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Home My WebLink About20252972.tiffDocuSign Envelope ID: 4AD20009-222B-4B53-AEDB-53OO531 D833F Use by Special Review (USR) Application Planning Department Use: Date Received: Amount $ Case # Assigned: U S R24-0019 Application Received By: Planner Assigned: P roperty Information Is the property currently in violation? No / ■ Yes Violation Case Number: Parcel Number: 1 4 7 1 _ 2 8 _ 1- 0 0- 0 1 3 and 012 S ite Address: As well as Weld County Parcel Number 147128100012 Le al Descri tion: Lots A and B of RECX17-0182 g P Section: 28 , Township 1 N, Range 66 Within subdivision or townsite? No / ■ Yes Name: W Zoning District: Ag Acreage: 32.87 Water (well permit # or water district tap #): Water Well Permit # 89154- F Sewer (On -site wastewater treatment system permit # or sewer account #): Septic Proposed Floodplain No / • Yes Geological Hazard V No / • Yes Airport Overlay V1 No / • Yes P roject U SR Use being applied for: Agricultural Support N ame of proposed business: CR6 Biochar Facility P roperty Owner(s) (Attach additional sheets if necessary.) N ame: Doug White Company: NGL Water Solutions DJ LLC Phone #: (720) 213-1521 Email: Jim.Winter©nglep.com Street Address: 865 North Albion Street, Suite 500 City/State/Zip Code: Denver, CO 80220 APPLICANT/AUTHORIZED AGENT (Authorization Form must be included if there is an Authorized Agent) N ame: Bob Demaree Company: Blackfoot Properties LLC Phone #: (317) 306-9823 Email: bob.demareepkw.com Street Address: 1142 Judson Street City/State/Zip Code: Longmont, CO 80501 I (We) hereby depose and state under penalties of perjury that all statements, proposals, and/or plans submitted with or contained within the application are true and correct to the best of my (our) knowledge. All fee owners of the property must sign this application or if an Authorized Agent signs, an Authorization Form signed by all fee owners must be included with the application. If the fee owner is a corporation, evidence must be included indicating the signatory has the legal authority to sign for the corporation. DocuSigned by: 151) `�00EC23A1 DCDC43D... �Ignature Bob Demaree OUdikaktt. 6/27/2024 I 16:15 EDT Date Signature Date Print Print 01/24 9 Legal Description LOTS A AND B OF RECORDED EXEMPTION NO. 1471-28-01-RECX17-0182, RECORDED APRIL 11, 2018 AT RECEPTION NO. 4390255 AND SURVEYOR'S AFFIDAVIT OF CORRECTION RECORDED SEPTEMBER 4, 2018 AT RECEPTION NO. 4428199, LOCATED IN THE THE WEST 1/2 OF THE NORTHEAST 1/4 AND IN THE EAST 1/2 OF THE NORTHWEST 1/4 OF SECTION 28, TOWNSHIP 1 NORTH, RANGE 66 WEST OF THE 6TH PRINCIPAL MERIDIAN, COUNTY OF WELD, STATE OF COLORADO. Departments of Planning Building, Development Review and Environmental Health 1402 N 17TH Avenue P.O. Box 758 Greeley, CO 80632 Authorization Form I, (We), NGL Water Solutions DJ LLC permission to Bob Choate giveI (Owner — please print) (Authorized Agent/Applicant—please print) to apply for any Planning, Building, Access, Grading or OWTS permits on our behalf, for the property located at (address or parcel number) below: Weld County Parcel Numbers 147128100013 and 147128100012 Legal Description: of Section 28 , Township 1 N, Range 88 W Subdivision Name: Lot Block Property Owners Information: Address: 865 North Albion Street, Suite 500, Denver, CO 80220 Phone: (72d) 213-1521 E-mail: Jim.Winter@nglep.com Authorized Agent/Applicant Contact Information: Address: 103 W. Mountain Ave Ste. 200 Fort Collins, CO 80524 Phone: (970) 449-8120 E-mail: bchoate@cp2law.com Correspondence to be sent to: Owner X Authorized Agent/Applicant X by: Mail Email X Additional Info: I (We) hereby certify, under penalty of perjury and after carefully reading the entire contents of this docume at the information stated above is true and correct to the best of my (our) knowledge. Date 72 iris 7e, Date Owner Signature nature Subscribed and sworn to before me this \as a Id My commission expires Ptrmi 11 ao.).-7 I AMANDA DILGER NOTARY PUBLIC - STATE OF COLORADO NOTARY ID 20234018665 MY COMMISSION EXPIRES MAY 19, 2027 • -_ day of 01/24 Notary Public • 20 211 by 11 Departments of Planning Building, Development Review and Environmental Health 1402 N 17TH Avenue P.O. Box 758 Greeley, CO 80632 Authorization Form (We),NGL Water Solutions DJ LLC , give permission to Bob Demaree (Owner -- please print) (Authorized Agent/Applicant—please print) to apply for any Planning, Building, Access, Grading or O'WTS permits on our behalf, for the property located at (address or parcel number) below: Weld County Parcel Numbers 147128100013 and 147128100012 Legal Description: of Section 28 , Township" 1 N, Range 66 W Subdivision Name: Lot Block, Property Owners Information: Address: 865 North Albion Street, Suite 500, Denver, CO 80220 Phone: (720) 213-1521 E-mail: Jim.Winter@nglep.com Authorized Agent/Applicant Contact Information: Address: 1142 Judson Street, Longmont, CO 80501 Phone: (317) 306-9823 E -Mail: bob.demaree@kw.com Correspondence to be sent to: Owner X Authorized Agent/Applicant X by: Mail Email X Additional Info: I (We) here docu edify, under penalty of perjury and after carefully reading the entire contents of this information stated above is true and correct to the best of my (our) knowledge. ture ate 7�1',�1� Date Owner Signature Subscribed and sworn to before me this t L day of �vky co\Jrs W\AA%(/ • My commission expires ,May VI, 3t).7 AMANDA DILGER NOTARY PUBLIC - STATE OF COLORADO NOTARY ID 20234018665 MY COMMISSION EXPIRES MAY 19, 2027 Notary Public ,20 p.m by 01/24 w Ns- -qmp- 11 Departments of Planning Building, Development Review and Environmental Health 1402 N 17TH Avenue P.O. Box 758 Greeley, CO 80632 Authorization Form We NGL Water Solutions DJ LLC , give permission to Michael Dente I, c), (Owner — please print) (Authorized Agent/Applicant—please print) to apply for any Planning, Building, Access, Grading or OWTS permits on our behalf, for the property located at (address or parcel number) below: Weld County Parcel Numbers 147128100013 and 147128100012 Legal Description: of Section 28 , Township 1 N, Range 66 W Subdivision Name: Lot Block Property Owners Information: Address: 865 North Albion Street, Suite 500, Denver, CO 80220 Phone: (720) 213-1521 E-mail: Jim,Winter@nglep.com Authorized Agent/Applicant Contact Information: Address: 1142 Judson Street, Longmont, CO 80501 Phone: (720) 841-7275 E -Mail: Michael.dente@kw.com Correspondence to be sent to: Owner X Authorized Agent/Applicant X by: Mail Email X Additional Info: I (We) he docu ature ify, under penalty of perjury and after carefully reading the entire contents of this e information stated above is true and correct to the best of my (our) knowledge. 10Z2-leb Date 7�.f�fl Date Owner Signature Subscribed and sworn to before me this \to day of a-5J‘y DbM#S (Alit My commission expires Plal I'1, a0017 AMANDA DILGER NOTARY PUBLIC - STATE OF COLORADO NOTARY ID 20234018665 MY COMMISSION EXPIRES MAY 19, 2027 01/24 Notary Public 201` by 11 Departments of Planning Building, Development Review and Environmental Health 1402 N 17TH Avenue P.O. Box 758 Greeley, CO 80632 Authorization Form I We NGL Water Solutions DJ LLC , give permission to Michael Hall (Owner — please print) (Authorized Agent/Applicant—please print) to apply for any Planning, Building, Access, Grading or O"V'TS permits on our behalf, for the property located at (address or parcel number) below: Weld County Parcel Numbers 147128100013 and 147128100012 Legal Description: of Section 28 , Township 1 N, Range 66 W Subdivision Name: Lot Block Property Owners Information: Address: 865 North Albion Street, Suite 500, Denver, CO 80220 Phone: (720) 213-1521 E -main: Jim.Winter@nglep.com Authorized Agent/Applicant Contact Information: Address: 1142 Judson Street, Longmont, CO 80501 Phone: (970) 391-9585 E -Mail: pagoda.mapping@gmail.com Correspondence to be sent to: Owner X Authorized Agent/Applicant X by: Mail, Email X Additional Info: I (We) h - .' certify, under penalty of perjury and after carefully reading the entire contents of this docu the information stated above is true and correct to the best of my (our) knowledge. 7#72"--"—e. Date nature Owner Signature Subscribed and sworn to before me this l� day of Z5ut'j polka Oilit My commission expires 01/24 frfety 12,0):7 AMANDA DILGER NOTARY PUBLIC - STATE OF COLORADO NOTARY ID 20234018665 MY COMMISSION EXPIRES MAY 19, 2O27 Notary Public Date , 2042i1 by 11 Energy Partners LP 6120 S. Yale Avenue • Suite 1300 • Tulsa • OK • 74136-4217 Phone 918-481-1119 • Fax 918-481-5896 Direct Dial 918-236-4785 Kurston.McMurrav@nglep.com July 9, 2024 Weld County Planning Department Post Office Box 758 Greeley, CO 80632 RE: NGL Water Solutions DJ, LLC To Whom It Concerns: I, Kurston P. McMurray, the duly appointed Executive Vice President, General Counsel and Secretary of NGL Water Solutions DJ, LLC, a Colorado limited liability company ("Company"), do hereby certify that: 1. That, H. Michael Krimbill is the duly elected, qualified and acting Chief Executive Officer with the authority to sign on behalf of the Company; 2. That, Doug White is the duly elected, qualified and acting Executive Vice President with the authority to sign on behalf of the Company; 3. That each of H. Michael Krimbill and Doug White are an "Authorized Officer" of the Company; 4. The Authorized Officer(s) is empowered and directed in the name and on behalf of the Company to do, or cause to be done, all acts and things (including the approval, execution and delivery of such agreements, instruments, certificates, and other documents and amendments, supplements or other modifications thereto) as the Authorized Officer(s) deems necessary, desirable or appropriate to effect the purposes and intent of the Company's business. 5. That, a copy of the Company minutes showing the appointment of the Authorized Officers is attached hereto as Exhibit A. IN WITNESS WHEREOF, I have executed this Letter requested by the Weld County Planning Department as of July 9, 2024. Kurston P. McMurray Executive Vice President, General Counsel and Secretary of the Company Weld County Planning Department July 9, 2024 Page 2 STATE OF OKLAHOMA ) COUNTY OF TULSA ) The foregoing letter was acknowledged before me on July 9, 2024, by Kurston P. McMurray, as Executive Vice President, General Counsel and Secretary of NGL Water Solutions DJ, LLC. SEAL ,`,'11011{111111!1/►O��lo,' �� 409 slAt � L. P 1' Obis``res t e..i• �P � • kO �'�°°•.` ' Notary Public Mao . # S Y ••. Ws • a• V • gip May 13, 2026 0a • o .a SP o s o a y °41. Vis O°G Ub.■.°° i�►,�►1lliiiill`{,, Document must be filed electronically. Paper documents are not accepted. Fees & forms are subject to change. For more information or to print copies of filed documents, visit www.sos.state.co.us. Colorado Secretary of State Date and Time: 03/27/2014 02:52 PM ID Number: 20111160724 Document number: 20141204160 Amount Paid: $25.00 ABOVE SPACE FOR OFFICE USE ONLY Articles of Amendment filed pursuant to §7-90-301, et seq. and §7-80-209 of the Colorado Revised Statutes (C.R.S.) ID number: 1. Entity name: 2. New Entity name: (if applicable) 20111160724 High Sierra Water Services, LLC (If changing the name of the limited liability company, indicate name before the name change) 3. Use of Restricted Words (f any of these terms are contained in an entity name, true name of an entity, trade name or trademark stated in this document, mark the applicable box) : 4. Other amendments, if any, are attached. 5. If the limited liability company's period of duration as amended is less than perpetual, state the date on which the period of duration expires: or NGL Water Solutions DJ, LLC "bank" or "trust" or any derivative thereof "credit union" "savings and loan" "insurance", "casualty", "mutual", or "surety" (rnm/dd/yyyY) If the limited liability company's period of duration as amended is perpetual, mark this box: 6. (Optional) Delayed effective date: 03/31/2014 11:59 PM (mm/dd/yyyy) Notice: Causing this document to be delivered to the secretary of state for filing shall constitute the affirmation or acknowledgment of each individual causing such delivery, under penalties of perjury, that the document is the individual's act and deed, or that the individual in good faith believes the document is the act and deed of the person on whose behalf the individual is causing the document to be delivered for filing, taken in conformity with the requirements of part 3 of article 90 of title 7, C.R.S., the constituent documents, and the organic statutes, and that the individual in good faith believes the facts stated in the document are true and the document complies with the requirements of that Part, the constituent documents, and the organic statutes. This perjury notice applies to each individual who causes this document to be delivered to the secretary of state, whether or not such individual is named in the document as one who has caused it to be delivered. 7. Name(s) and address(es) of the individual(s) causing the document to be delivered for filing: Laughlin William G. (Last) (First) (Middle) (Suffix) AMD_LLC Page 1 of 2 Rev. 12/01/2012 3773 Cherry Creek North Drive Suite 1000Street name and number or Post Office Box information) Denver CO 80209 (City) u nhec )States (Postal/Zip Code) (Province — if applicable) (Country — if not US) (The document need not state the true name and address of more than one individual. However, if you wish to state the name and address of any additional individuals causing the document to be delivered for filing, mark this box name and address of such individuals.) and include an attachment stating the Disclaimer: This form, and any related instructions, are not intended to provide legal, business or tax advice, and are offered as a public service without representation or warranty. While this form is believed to satisfy minimum legal requirements as of its revision date, compliance with applicable law, as the same may be amended from time to time, remains the responsibility of the user of this form. Questions should be addressed to the user's attorney. AMD_LLC Page 2 of 2 Rev. 12/01/2012 Document must be filed electronically. Paper documents will not be accepted. Document processing fee Fees & forms/cover sheets are subject to change. To access other information or print copies of filed documents, visit www.sos.state.co.us and select Business. $25.00 Colorado Secretary of State Date and Time: 04/15/2011 04:10 AM ID Number: 20111160724 Document number: 20111227973 Amount Paid: $25.00 ABOVE SPACE FOR OFFICE USE ONLY Articles of Amendment filed pursuant to §7-90-301, et seq. and §7-80-209 of the Colorado Revised Statutes (C.R.S.) ID number: 1. Entity name: 2. New Entity name: (if applicable) 3. Use of Restricted Words (f any of these terms are contained in an entity name, true name of an entity, trade name or trademark stated in this document, mark the applicable box) : 4. Other amendments, if any, are attached. 5. If the limited liability company's period of duration as amended is less than perpetual, state the date on which the period of duration expires: OR 20111160724 High Sierra Water Services Niobrara, LLC (If changing the name of the limited liability company, indicate name BEFORE the name change) High Sierra Water Services, LLC "bank" or "trust" or any derivative thereof "credit union" "savings and loan" "insurance", "casualty", "mutual", or "surety" (mm/dd/yyyy) If the limited liability company's period of duration as amended is perpetual, mark this box: 6. (Optional) Delayed effective date: Notice: (mm/dd/yyyy) Causing this document to be delivered to the secretary of state for filing shall constitute the affirmation or acknowledgment of each individual causing such delivery, under penalties of perjury, that the document is the individual's act and deed, or that the individual in good faith believes the document is the act and deed of the person on whose behalf the individual is causing the document to be delivered for filing, taken in conformity with the requirements of part 3 of article 90 of title 7, C.R.S., the constituent documents, and the organic statutes, and that the individual in good faith believes the facts stated in the document are true and the document complies with the requirements of that Part, the constituent documents, and the organic statutes. This perjury notice applies to each individual who causes this document to be delivered to the secretary of state, whether or not such individual is named in the document as one who has caused it to be delivered. AMD LLC Page 1 of 2 Rev. 5/01/2010 7. Name(s) and address(es) of the individual(s) causing the document to be delivered for filing: Gognat Richard J (Last) (First) 3773 Cherry Creek North Drive (Middle) (Suffix) Suite 100o name and number or Post Office Box information) Denver CO 80209 (City) U n1fec)States (Postal/Zip Code) (Province — if applicable) (Country — if not. US) (The document need not state the true name and address of more than one individual. However, if you wish to state the name and address of any additional individuals causing the document to be delivered for filing, mark this box name and address of such individuals.) Disclaimer: and include an attachment stating the This form, and any related instructions, are not intended to provide legal, business or tax advice, and are offered as a public service without representation or warranty. While this form is believed to satisfy minimum legal requirements as of its revision date, compliance with applicable law, as the same may be amended from time to time, remains the responsibility of the user of this form. Questions should be addressed to the user's attorney. AMD LLC Page 2 of 2 Rev. 5/01/2010 Document processing fee If document is filed on paper $10.00 If document is filed electronically Currently Not Available Fees & forms/cover sheets are subject to change. To file electronically, access instructions for this form/cover sheet and other information or print copies of filed documents, visit www.sos.state.co.us and select Business. Paper documents must be typewritten or machine printed. ABOVE SPACE FOR OFFICE USE ONLY Statement of Change Changing Information Other Than Principal Office Address or Registered Agent Information filed pursuant to §7-90-305.5 and, if applicable, §7-90-804 of the Colorado Revised Statutes (C.R.S.) ID number: 1. Entity name: 2. True name: (if different from the entity name) 0111160724 High Sierra Water Services Niobrara, LLC Complete lines 3 - 9 as applicable. You must complete section 10. 3. Document number: (required for change(s) to 4, 5, 6, 7 and/or 8 below) 20111160724 4. Change of entity name of record (LLP, art. 61 LLLP or foreign entity only): New entity name: High Sierra Water Services, LLC 5. Change of true name of record (LLP, art. 61 LLLP, general partnership or foreign entity only): New true name: 6. Change of jurisdiction of formation of record (foreign entity only): New jurisdiction of formation: 7. Change of entity form of record (foreign entity only): New entity form: CHANGE_OTHER Page 1 of 2 Rev. 12/01/2009 8. Other change(s) not provided for above: If other information contained in the filed document is being changed, mark this box and include an attachment stating the information to be changed and each such change. If other information is being added or deleted, mark this box and include an attachment stating each addition or deletion. 9. (Optional) Delayed effective date: Notice: (mm/dd/yyyy) Causing this document to be delivered to the Secretary of State for filing shall constitute the affirmation or acknowledgment of each individual causing such delivery, under penalties of perjury, that such document is such individual's act and deed, or that such individual in good faith believes such document is the act and deed of the person on whose behalf such individual is causing such document to be delivered for filing, taken in conformity with the requirements of part 3 of article 90 of title 7, C.R.S. and, if applicable, the constituent documents and the organic statutes, and that such individual in good faith believes the facts stated in such document are true and such document complies with the requirements of that Part, the constituent documents, and the organic statutes. This perjury notice applies to each individual who causes this document to be delivered to the Secretary of State, whether or not such individual is identified in this document as one who has caused it to be delivered. 10. The true name and mailing address of the individual causing this document to be delivered for filing are Gognat Richard J (Last) (First) (Middle) (Suffix) 3773 Cherry Creek North Drive, Suite 1000 (Street number and name or Post Office Box information) Denver (City) CO 80209 (State) U.S. (ZIP/Postal Code) (Province — if applicable) (Country) (If applicable, adopt the following statement by marking the box and include an attachment.) This document contains the true name and mailing address of one or more additional individuals causing the document to be delivered for filing. Disclaimer: This form/cover sheet, and any related instructions, are not intended to provide legal, business or tax advice, and are furnished without representation or warranty. While this form/cover sheet is believed to satisfy minimum legal requirements as of its revision date, compliance with applicable law, as the same may be amended from time to time, remains the responsibility of the user of this form/cover sheet. Questions should be addressed to the user's legal, business or tax advisor(s). CHANGE_OTHER Page 2 of 2 Rev. 12/01/2009 Mail form to: Colorado Secretary of State 1700 Broadway Ste 200 Denver, CO 80290 Make checks payable to: Colorado Secretary of State Do not include this page with your filing. Document must be filed electronically. Paper documents will not be accepted. Document processing fee Fees & forms/cover sheets are subject to change. To access other information or print copies of filed documents, visit www.sos.state.co.us and select Business Center. $50.00 Colorado Secretary of State Date and Time: 03/16/2011 03:10 PM ID Number: 20111160724 Document number: 20111160724 Amount Paid: $50.00 ABOVE SPACE FOR OFFICE USE ONLY Articles of Organization filed pursuant to § 7-80-203 and § 7-80-204 of the Colorado Revised Statutes (C.R.S.) 1. The domestic entity name of the limited liability company is High Sierra Water Services Niobrara, LLC (The name of a limited liability company must contain the term or abbreviation "limited liability company ", "ltd. liability company ", "limited liability co. ", "ltd. liability co.", "limited", "l.l.c. ", "llc ", or "ltd.". See §7-90-601, C.R.S.) (Caution: The use of certain terms or abbreviations are restricted by law. Read instructions for more information.) 2. The principal office address of the limited liability company's initial principal office is Street address Mailing address (leave blank if same as street address) (Street number and name or Post Office Box information) 3773 Cherry Creek Drive North Suite 1000 (Street number and name) Denver (City) CO 80209 (State) (ZIP/Postal Code) United States (Province — if applicable) (Country) (City) (State) (ZIP/Postal Code) (Province — if applicable) (Country) 3. The registered agent name and registered agent address of the limited liability company's initial registered agent are Name (if an individual) OR (if an entity) (Caution: Do not provide both an individual and an entity name.) (Last) (First) (Middle) High Sierra Water Services, LLC (Suffix) Street address 3773 Cherry Creek Drive North Suite 1000 (Street number and name) Denver CO 80209 (City) (State) (ZIP Code) ARTORG_LLC Page 1 of 3 Rev. 02/28/2008 Mailing address (leave blank if same as street address) (Street number and name or Post Office Box information) CO (The following statement is adopted by marking the box.) The person appointed as registered agent has consented to being so appointed. (City) (State) (ZIP Code) 4. The true name and mailing address of the person forming the limited liability company are Name (if an individual) OR (if an entity) (Caution: Do not provide both an individual and an entity name.) 3773 Cherry Creek Drive North (Last) (First) High Sierra Water Services, LLC (Middle) (Suffix) Mailing address Suite 100 6Street number and name or Post Office Box information) Denver CO 80209 (City) (State) (ZIP/Postal Code) United States (Province — if applicable) (Country) (If the following statement applies, adopt the statement by marking the box and include an attachment.) The limited liability company has one or more additional persons forming the limited liability company and the name and mailing address of each such person are stated in an attachment. 5. The management of the limited liability company is vested in (Mark the applicable box.) one or more managers. ✓ OR �I the members. 6. (The following statement is adopted by marking the box.) There is at least one member of the limited liability company. 7. (If the following statement applies, adopt the statement by marking the box and include an attachment.) ❑ This document contains additional information as provided by law. 8. (Caution: Leave blank if the document does not have a delayed effective date. Stating a delayed effective date has significant legal. consequences. Read instructions before entering a date.) (If the following statement applies, adopt the statement by entering a date and, if applicable, time using the required format.) The delayed effective date and, if applicable, time of this document is/are (mm/dd/yyyy hour: minute am/pm) ARTORG_LLC Page 2 of 3 Rev. 02/28/2008 Notice: Causing this document to be delivered to the Secretary of State for filing shall constitute the affirmation or acknowledgment of each individual causing such delivery, under penalties of perjury, that the document is the individual's act and deed, or that the individual in good faith believes the document is the act and deed of the person on whose behalf the individual is causing the document to be delivered for filing, taken in conformity with the requirements of part 3 of article 90 of title 7, C.R.S., the constituent documents, and the organic statutes, and that the individual in good faith believes the facts stated in the document are true and the document complies with the requirements of that Part, the constituent documents, and the organic statutes. This perjury notice applies to each individual who causes this document to be delivered to the Secretary of State, whether or not such individual is named in the document as one who has caused it to be delivered. 9. The true name and mailing address of the individual causing the document to be delivered for filing are Spector Barry (Last) 1050 17th Street (First) w (Middle) (Siff x) (Street number and name or Post Office Box information) Suite 1660 Denver CO 80265 (City) (State) (ZIP/Postal Code) United States (Province — if applicable) (Country) (If the following statement applies, adopt the statement by marking the box and include an attachment.) This document contains the true name and mailing address of one or more additional individuals causing the document to be delivered for filing. Disclaimer: This form/cover sheet, and any related instructions, are not intended to provide legal, business or tax advice, and are furnished without representation or warranty. While this form/cover sheet is believed to satisfy minimum legal requirements as of its revision date, compliance with applicable law, as the same may be amended from time to time, remains the responsibility of the user of this form/cover sheet. Questions should be addressed to the user's legal, business or tax advisor(s). ARTORG_LLC Page 3 of 3 Rev. 02/28/2008 SE005--2001 09:56 t Please include a typed self-addressed envelope MUST BE TYPED FILING FEE: $25.00 MUST SUBMIT TWO COPIES CT CORPORATION SYS Mail, to: Secretary of State Corporations Section 1560 Broadway, Suite 200 Denver, CO 80202 (303) 894-2251 Fax (303) 894-2242 fTle F34li11D411.4ORAMENDED AUTHORITY oHpt4GE �F HPiLN%IPPL1CATION Pursuant to the provisions of the Colorado Business Corporation Act, the undersigned corporation hereby applies for an Amended Authority and states:: r 3148630794 P.02 For office use only 012 PIED LONETTA DAVID$ON COLORADO SECRETARY OF STATE 20011173391 SECRETARY OF STATE 09415-2001 11:13:55 FIRST; The name of the corporation is: HS RESOURCES, INC. gee • SECOND: if the corporate name was not available , the assumed name of the corporation is: THIRD: IMO • 4 I v 1 (Check if Applicable) The corporate name of the corporation has become available in Colorado and the corporation desires to amend its Authority to reflect the corporate name on the records of the Secretary of State. The corporation has amended the period of duration In its Articles of Incorporation to The corporation has changed its name to KERR-MCGEE ROCKY MOUNTAIN CORPORATION The name which It elects to use in Colorado Is: KERR-MCGEE ROCKY MOUNTAIN CORPORATION V (If its corporate name is not available for use in Colorado) The corporation has redomesticated from to • r FOURTH: This application is accompanied by a Certificate of Fact, duly authenticated by the proper officer in the state or country of incorporation (or redomestication as the case may be) certifying the statement(s) made above. ■ • • KERR-MCGEE ROCKY MOUNTAIN CORPORATION Na nye of Corporation Signature Title Don Hager, Asst, Secy. I Revised 7195 • • • • • cant - CT Son online SEP-05-2001 09:32 3148630794 99'4 P.02 .4 • • SEAS -2001 09:56 • • • a • • I' • • St • Ps- • • • CT CORPORATION SYS 3148530794 P.03 . State of Delaware fflceof the Secretary of State PAGE 1 • I, HARRIET SMITH WINDSOR, SECRETARY OF STATE OF THE STATE OF DELAWARE, DO HEREBY CERTIFY THAT TUE SAID "HS RESOURCES , INC • ", • r•: b:'• WI 4ti1.:.• . • ... FILED A CERTIFICATE OF AM umnimm, ••: .....�CRANGIN.G ITS NAME TO ry ♦N. • f •., • • . •• •r *es tr Y y,.• • •s •P• ..."A . t /. • ''�' ,•7 i. • •' la t J 1•i1.� �• • •• • :~• • , PS' • �•:Z I.4 • �.. fl• •• rt * KERR-MCGEE ROCKY MOUNTAIN Z 'CORPofj AT•I ONE' , � •TIDE TWENTY a THIRD DAY ' OF • • , • AUGUST, A.,,D: ;..00:1 , :.AT 12 0' CLOCK P.M. . .l • • ••• AND ;I DO HEREBY FURTHER CERTIFY THAT THE :ANN-0AL 'REPORTS HAVE 3 1.4.; 1 s • S. • • • •• L •" • • • • BEEN • • . :• ' l n •• ••..e TILED TO'� DATE ° de . • - / • • ▪ _. �•. • 44 • • .'•. • '• • 0. •- • a • 7 .• •. •Z• ��• •.• r:. i. . .. • HEREBY: CETSIFY - erURTHER T;.;-"i#E CHI SE } ;'SAXES • • ft • tis•vim • •.• • f 7 Sal. vs 4 ., . •.* • • • • - f S • • • •• • fi• • • t • • • • • . • • • } + • HAVE cBEEN PAID TO • DATE •.. • . - • • • • •'• ••• • � •. • • • :•• • • • • • • �. •••• ▪ • • �1 • ▪ .:.r . •3f ' ▪ • • • • •. 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'j• l • • O7 •• -I >14 • ji . • K Y • ••• • I• S. • • 7 '7 r • • S. • aW '-1 .•"?/J w • .• e • • • ' t. ••. • 1.l •... , • , i Y • • t KA a - ••c •. • . • 'A ••s • St �• • J. s;i .•• •` }rift N . • •.• •d f 4 •• .. •r • 01 .5 a se 1 f :•a S• • • 3 • . 1•.• i �. •• • ••• 1• • Si • •r • .. • • set Smith Vim&.,, Secretary O, f Statc . • • 2115773 .8320 010417905 SEP-05-2001 09:32 AUTHENTICATION : 1310817 3148630794 99% DATE: 08-23 -01 P.03 EXHIBIT A NGL ENERGY HOLDINGS LLC RESOLUTION OF THE BOARD OF DIRECTORS Concerning thaAppointment of Omnibus Officers April 23, 2024 At the duly called meeting of the Board of Directors ("Board'") on April 23, 2024, at which a quorum was present, the Omnibus Officer Resolutions currently in effect ("Resolution") were updated and adopted by NGL Energy Holdings LLC, a Delaware limited liability company ("Company") and the general partner of NGL, Energy Partners LP, a Delaware limited partnership ("Partnership"); a n d WHEREAS Company is the parent company of all named subsidiaries (collectively "NGL companies"), and its Board is the Board for all named NGL Companies as follows: NGL WATER SOLUTIONS DJ, LLC Revolutions Appointing Omnibus Officea April 23, 2024 = Page 1 WHEREAS, the Board deems it to be in the best interest ofthe NGL Companies to appoint, wanfinn and reaffirm the officers as set forth herein to serve until their successors shall be duly elected or chosen and qualified, or until their earlier death, resignation or removal; WHEREAS, the Board deems it to be in the best interest of the NGL Companies to authorize its officers with the title ofExecutive Vice President and above to act on behalfof the NOL Company appearing beside their none as well as the Company and the Partnership; WHEREAS, Company hereby confirms the following actions and adopts the following resolutions effective April 22, 2024 in accordance with applicable law; RESOLVED, that the persons appearing below are confirmed as the current officers of the L Companies as set forth opposite their respective names, to serve until such time as their successors shall be duly elected or chosen and qualified, or until their earlier death, resignation or removal: Name office _ .. H. Michael Krimbill Chief Executive Officer ICurston P. McMurray Executive Vice President, General. Counsel Corporate Secretary Doug White Executive Vice President Resolutions Appointing Otte n April 23, 2024 at Page 2 FURTHER RESOLVED, ED, any officer of the NGL Companies (each an "Officer") is authorized, empowered and directed to do or cause to be done all such action as such officer in their discretion may consider necessary or appropriate in order to carry out the Resolutions set forth herein and the transactions contemplated hereby and in accordance with the current Financial Authority Delegation; FURTHER RESOLVED, that each of the lawful acts of the officers taken prior to the date hereof, be, and hereby are, authorized, ratified, approved, adopted, and confirmed; FURTHER RESOLVED, that the Secretary, is hereby authorized, empowered and directed to update these Resolutions as necessary in the event that Officers are appointed to, or removed from, official positions by management and/or the Board during the normal course of business; end FURTHER RESOLVED, that the Secretary, Assistant Secretary and any other appropriate Officer are, and each hereby is, authorized, empowered and directed to certify and furnish such copies of these resolutions and such statements as to the incumbency of the Company's Officers, under Company seal if necessary, as may be requested, and any person receiving such certified. copy is and shalt be authorized to rely upon the contents thereof. Kurston P. McMurray, cretary knobs dons Appointing Omnibus OfficersApri123, 2024. 'e 3 BIOCHAR NOW, LLC USE BY SPECIAL REVIEW (USR) PLANNING QUESTIONNAIRE Ma 20, 2024 Answer the following questions per Section 23-2-260. A, B, C & E of the Weld County Code. Please type on a separate sheet. If a question does not pertain to your proposal, please respond with an explanation — do not leave questions blank. 1. Explain the proposed use and business name. RESPONSE: A Biochar Now facility is proposed on this property may be permitted by a USR in the Ag zone district. The Biochar facility is an expansion site, which will take the waste wood from Vestas and other companies on the US -85 corridor and convert it to biochar, being a carbon dense raw product which is used in a variety of agricultural and industrial applications. This conversion facility will only be used for storage and recycling of waste wood via kilns. The resulting biochar will then be trucked to the current Biochar location in Berthoud for processing, sorting by size and packaging. 2. Explain the need for the proposed use. RESPONSE: There is a high demand from numerous industrial and manufacturing enterprises in the area for a facility where raw wooden waste materials (primarily wooden pallets) may be diverted. The Biochar facility will accept and convert this waste wood into a saleable product. 3. Describe the current and previous use of the land. RESPONSE. The property has historically been vacant and is unimproved. The property is currently zoned Ag and is being leased to a local resident for agricultural purposes, namely flood -irrigated farming. There are also 3 existing Class II injection wells on the site. These are existing injection wells but they are not operational at this time. 4. Describe the proximity of the proposed use to residences. RESPONSE: There are two rural residences relatively close to the site. 14760 CR 6 is located approximately 200' east of the subject property and over 350' from the facility itself. 14512 CR 6 is located approximately 300' south of the subject property and over 500' from the facility itself. There are several other rural residential properties in the area, but all are over 1000' from the site. 5. Describe the surrounding land uses of the site and how the proposed use is compatible with them. RESPONSE: Page 1 of 6 North: agricultural land with a waterbody and vegetation; no residences; historic farming. The proposed u se will not harm or create any nuisance conditions that would directly affect this site. South: rural residential property with horse operations. The proposed use will make every effort to respect and protect the existing land uses to the south. We have obtained a noise study with mitigation options that will facilitate making this site compatible with this property, such as opaque screening and sound walls. All lighting will be directed away from residential. properties. West: agricultural land with a waterbody and vegetation; no residences; grazing land. The proposed use will not harm or create any nuisance conditions that would directly affect this site. East: rural residential. property. The proposed use will make every effort to respect and protect the existing land uses to the east. We have obtained a noise study with mitigation options that will facilitate making this site compatible with this property, such as opaque screening and sound walls. All lighting will be directed away from residential properties. 6. Describe the hours and days of operation (i.e. Monday thru Friday 8:00 a.m. to 5:00 p.m.). RESPONSE. The facility will be in operation 24 hours per day, year-round. However, all truck traffic (inbound and outbound) will occur during normal business hours, typically corresponding to daylight hours (6am-8pm April through October and 7am to 7pm November -March). No nuisance generating activities will occur at n ight, with the only activity during this time being kiln cycles. 7. Describe the number of employees including full-time, part-time and contractors. If shift work is proposed, detail number of employees, schedule and duration of shifts. RESPONSE: Approximately 6-12 full-time employees total will be based on -site. Three 8 -hour shifts per day with 2-4 e mployees per shift are anticipated. 8. Describe the maximum number of users, patrons, members, buyers or other visitors that the site will accommodate at any one time. RESPONSE: The maximum number at any given moment will be 18 people. The number of employees and third -party drivers on -site at any given time will be up to 10, although n ormally this will be much less. Employees will access the site in a staggered manner. At any given time, approximately 2-4 employees will be on site. Throughout the week there will be trucks dropping off waste wood (during normal business hours). Third - party companies and suppliers will deliver raw material to the site. Once every few weeks, Biochar will deliver their mobile shredder and mobile screener to break down the waste wood and sort it into piles to then be loaded into kilns. Throughout the week, trucks will pick up the biochar final product from this site and deliver it to their Berthoud location to be processed, sorted and bagged. Company employees will truck biochar to the Berthoud facility. Page 2 of 6 No customers or visitors (not a retail location) 9. List the types and maximum numbers of animals to be on the site at any one time (for dairies, livestock confinement operations, kennels, etc.). RESPONSE: None. Not applicable. 10. List the types and number of operating and processing equipment. RESPONSE. 1 Mobile Shredder 1 Mobile Screener 40 Kilns and electrical controls (which includes backup kilns and electrical controls) 1 Skid Steer and 1 Loader 11. List the types, number and uses of the existing and proposed structures. RESPONSE: There are currently three sheds covering the injection wells. One proposed modular office building (approx. 1,500sf) 12. Describe the size of any stockpile, storage or waste areas. RESPONSE: Stockpiles of raw wood materials will be distributed, organized and managed throughout the site, as depicted on the map. Stockpiles will be up to 20' in height. Waste will be collected in dumpsters. 13. Describe the method and time schedule of removal or disposal of debris, junk and other wastes associated with the proposed use. RESPONSE: Reference the separate Waste Handling Plan document. 14. Include a timetable showing the periods of time required for the construction of the operation. RESPONSE: Construction will take approximately 4-6 months. 15. Describe the proposed and existing lot surface type and the square footage of each type (i.e. asphalt, gravel, landscaping, dirt, grass, buildings). RESPONSE: An approximately 100'x100' concrete pad will be installed on -site. Driving areas as well as the operations area (where the active kilns are) will be graveled. Modular office will be approx. 1,500sf (exact size tbd). This is addressed in more detail in the preliminary drainage report. 16. How many parking spaces are proposed? How many handicap -accessible parking spaces are proposed? Page 3 of 6 RESPONSE: Unmarked employee parking will be provided around the modular office trailer. Space for 12 vehicles. No handicap stalls are proposed, as this is not a public facility. 17. Describe the existing and proposed fencing and screening for the site including all parking and outdoor storage areas. RESPONSE: The defined perimeter of the facility will be secured with an opaque metal fence, 8' in height. 18. Describe the existing and proposed landscaping for the site. RESPONSE: No landscaping is existing or proposed. 19. Describe reclamation procedures to be employed as stages of the operation are phased out or upon cessation of the Use by Special Review activity. RESPONSE: Should the facility close and cease to operate, all equipment and materials would be removed from the site within six months. The site surface would be reclaimed to the pre -operational state. 20. Describe the proposed fire protection measures. RESPONSE: We have preemptively engaged with Brighton Fire Rescue District on this site. No chemicals are used in the conversion of wood. Standard fire -fighting methods are appropriate for this site. 21. Explain how this proposal is consistent with the Weld County Comprehensive Plan per Chapter 22 of the Weld County Code. RESPONSE: This proposal is supported by the following Weld County Comprehensive Plan citations: Section 22-2-10.8. Respecting Private Property Rights. One of the basic principles upon which the United States was founded is the right of citizens to own and utilize property so long as that use complies with local regulations and does not interfere with or infringe upon the rights of others. By requesting this USR, we are attempting to exercise our private property rights to develop this property. The proposed facility is allowed on this subject property, provided that compliance with the USR review criteria can be demonstrated. The facility will be designed to not impact the rights of others, most importantly the surrounding property owners. Section 22-2-10. C. Promoting Economic Growth and Stability. Land use policies have a significant impact on economic conditions in the County and should be structured to encourage economic prosperity. To ensure the continued strength of Weld County's economy, land use processes and decisions based on this plan shall be consistent and promote fiscally responsible growth. The proposed Biochar facility will provide economic growth and prosperity to Weld County. Given this operation is a necessary partner to many other existing County businesses, such as Vestas and Republic, by offering this conversion facility, there is an increased likelihood that other businesses will remain and Page 4 of 6 flourish in Weld County, as their needs are met in part by the development of this site. This idea is supported by Section 22.2.40.A.5 of the Comprehensive Plan, which states: "Encourage agglomeration economies of synergistic businesses." The proposed Biochar facility integrates with and supports the existing industrial and manufacturing business presence in southern Weld County, which further reinforces the industry as a whole. Additionally, more than ten jobs will be generated by this site, not including construction crews and truck drivers. Biochar is committed to remaining in Weld County, as their existing facility is located within the municipal limits of Berthoud. As part of the current expansion effort, Biochar explored a number of sites within the broader northern Colorado region, including in other Counties and decided to continue and focus their growth efforts in Weld County. 22. Explain how this proposal is consistent with the intent of the zone district in which it is located. (Intent statements can be found at the beginning of each zone district section in Article III of Chapter 23 of the Weld County Code.) RESPONSE: Section 23-3-10. Agriculture in the county is considered a valuable resource which must be protected from adverse impacts resulting from uncontrolled and undirected business, industrial and residential land uses. The A (Agricultural) Zone District is established to maintain and promote agriculture as an essential feature of the county. The A (Agricultural) Zone District is intended to provide areas for the conduct of agricultural activities and activities related to agriculture and agricultural production, and for areas for natural resource extraction and energy development, without the interference of other, incompatible land uses. This USR is directly related to agriculture. The proposed site will take raw wood materials and convert them to biochar. The biochar that is produced is further processing and sorted in Berthoud. The final biochar product is used for agriculture applications including soil amendments and carbon capture and also to support the energy development industry, as the biochar is used in soil amendments as part of oil and gas production site reclamation, which is rapidly occurring in Weld County. 23. Explain how this proposal will be compatible with future development of the surrounding area or adopted master plans of affected municipalities. RESPONSE: This property is located in the CPA of Fort Lupton. However, this property is south of CR 6, so there is no annexation potential due to restrictions in other jurisdictional agreements. In addition to Fort Lupton, this property is located within the Future Land Use Map area of the City of Brighton. On this map, this property is designated as "Agriculture (Adams/Weld)" likely indicating its current unincorporated status. Per the FLUM notes, "This map is intended to serve as a guide for future land use patterns within Brighton's GMA and is advisory in nature. Land use patterns depicted on the map are generalized, recognizing that development proposals may contains mixture of land uses and density levels..." In this way, a specific land use application does not necessarily have to comply with the FLUM, although it does, as described below. Accordingto the 2016 Brighton Comprehensive Plan, Chapter 3 — Future Land Use Plan, explains the future land use designations. The "Agriculture" designation states: "Agricultural land uses are expected to Page 5 of 6 remain in the County and are primarily adjacent to ditches, open space, estate residential, and industrial land uses. The agricultural landscape provides separation from adjacent municipalities." As the subject USR application is for an agricultural support and service operation, is separated from adjacent municipalities, is nearby ditches, open spaces, rural. residential and industrial land uses, the subject use is directly compatible with both the designation itself and the existing surrounding land uses. It is clear that the Brighton Comprehensive Nan does not characteristically object to the proposed facility. Note, further to the east of Brighton, is the Town of Lochbuie. However, the Lochbuie Future Land Use Map does not extend west of CR 33 and does not include the subject site. 24. Explain how this proposal impacts the protection of the health, safety and welfare of the inhabitants of the neighborhood and the County. RESPONSE: Mitigation is a key element to this proposed facility. The Waste Handling Nan, Dust Abatement Nan, Lighting Nan, Screening Nan, Site Plan and Noise Study and measures, are all being developed to account for the protection of the health, safety and welfare of the inhabitants of the neighborhood and the County. 25. Describe any irrigation features. If the proposed use is to be located in the A (Agricultural) Zone District, explain your efforts to conserve prime agricultural land in the locational decision for the proposed use. RESPONSE. The property is currently flood irrigated. This water may be used elsewhere for agricultural purposes and will not be sold as part of this project. This property contains soil classified as farmland of statewide importance and prime farmland if irrigated. However, this classification depends on soil erodibility and climate factor. Furthermore, this is a small site, at approximately 33 acres and there is not a significant reduction in farmland from this application. 26. Explain how this proposal complies with Article V and Article XI of Chapter 23 if the proposal is located within any Overlay Zoning District (Airport, Geologic Hazard, or Historic Townsites Overlay Districts) or a Special Flood Hazard Area identified by maps officially adopted by the County. RESPONSE: This property is not located within an Airport, Geologic Hazard, or Historic Townsites Overlay District or within a Special Flood Hazard Area or MS4 area. 27. Detail known State or Federal permits required for your proposed use(s) and the status of each permit. Provide a copy of any application or permit. RESPONSE: Air Permits through the CDPHE will be obtained as well as a Stormwater Permit and Grading Permit, as applicable. Page 6 of 6 BIOCHAR NOW, LLC USE BY SPECIAL REVIEW (USR) DEVELOPMENT REVIEW QUESTIONNAIRE May 20, 2024 Answer the following questions per Section 8-11-40, Appendix 8-Q, and Section 8-14-10 of the Weld County Code. Please type on a separate sheet. If a question does not pertain to your proposal, please respond with an explanation — do not leave questions blank. 1. Describe the access location and applicable use types (i.e., agricultural, residential, commercial/industrial, and/or oil and gas) of all existing and proposed accesses to the parcel. Include the approximate distance each access is (or will be if proposed) from an intersecting county road. State that no existing access is present or that no new access is proposed, if applicable. RESPONSE: There are two existing access points for this site. One access exists off CR 6 at the far eastern point of the property, at the location of a shared easement, used for residential and ag purposes, located approx. 1300' west of CR 31. The other access is on the diagonal portion of CR 6 and was used to build the NGL injection wells, located approx. 2300' west of CR 31. 2. Describe any anticipated change(s) to an existing access, if applicable. RESPONSE: Neither of the above access points are proposed to be used in the future. We propose to close and reclaim the western access on the diagonal and will not use the eastern access point, which is used for residential and agricultural purposes, as we do not want to create any vehicular conflicts. We are requesting a new access point, to be used for both Lots A and B, to be located at least 330' west of the existing eastern access point. 3. Describe in detail any existing or proposed access gate including its location. RESPONSE: Proposed gating will be located on site, setback from the CR 6 roadway so that the longest vehicle to enter the site will not project onto the County Road. Final site design TBD. 4. Describe the location of all existing accesses on adjacent parcels and on parcels located on the opposite side of the road. Include the approximate distance each access is from an intersecting county road. RESPONSE: There is one existing ag access on the opposite side of CR 6, at the rough location where CR 6 bends from W -E to SW -NE, approx. 2100' west of CR 31. 5. Describe any difficulties seeing oncoming traffic from an existing access and any anticipated difficulties seeing oncoming traffic from a proposed access. RESPONSE: There are no sight issues or anticipated difficulties with identifying oncoming traffic from the proposed access point. The proposed point will provide safety by relocating the access point that is located on the diagonal portion of CR 6, where the road curves around an adjacent waterbody. Page 1 of 2 6. Describe any horizontal curve (using terms like mild curve, sharp curve, reverse curve, etc.) in the vicinity of an existing or proposed access. RESPONSE: There is sharp curve on CR 6 as it goes around a pond, which is located in the middle of the CR 6 section line. 7. Describe the topography (using terms like flat, slight hills, steep hills, etc.) of the road in the vicinity of an existing or proposed access. RESPONSE: The road is quite flat. There are no hills on this portion of the CR 6 roadway. Page 2 of 2 BIOCHAR NOW, LLC USE BY SPECIAL REVIEW (USR) ENVIRONMENTAL HEALTH QUESTIONNAIRE May 29, 2024 Answer the following questions per the Weld County Code, Chapters 14, 23 and 30. Please type on a separate sheet. If a question does not pertain to your proposal, please respond with an explanation - do not leave questions blank. 1. Discuss the existing and proposed potable water source. If utilizing a drinking water well, include either the well permit or well permit application that was submitted to the State Division of Water Resources. If utilizing a public water tap, include a letter from the Water District, a tap or meter number, or a copy of the water bill. RESPONSE: No existing water source is on the property. The applicant team is in the process of applying for a commercial on -site water well to serve potable water needs. 2. Discuss the existing and proposed sewage disposal system. What type of sewage disposal system is on the property? If utilizing an existing on -site wastewater treatment system, provide the on -site wastewater treatment permit number. (If there is no on -site wastewater treatment permit due to the age of the existing on -site wastewater treatment system, apply for a on -site wastewater treatment permit through the Department of Public Health and Environment prior to submitting this application.) If a new on -site wastewater treatment system will be installed, please state "a new on -site wastewater treatment system is proposed." (Only propose portable toilets if the use is consistent with the Department of Public Health and Environment's portable toilet policy.) RESPONSE: An on -site wastewater treatment system is proposed to serve the facility. The OWTS will be designed and permitted following approval of the USR application. 3. If storage or warehousing is proposed, what type of items will be stored? RESPONSE: Raw wood will be stored on the property. No warehousing. Following conversion to Biochar, totes may temporarily remain on -site until picked -up and removed from the site. 4. Describe where and how storage and/or stockpile of wastes, chemicals, and/or petroleum will occur on this site. RESPONSE: No chemicals will be stored on site. Fuel storage (diesel and propane) will occur in above -ground fuel containers in accordance with CDPHE regulations. Waste materials will be disposed of per the Waste Handling Plan. 5. If there will be fuel storage on site, indicate the gallons and the secondary containment. State the number of tanks and gallons per tank. Page 1 of 2 RESPONSE: 500 gallon diesel fuel tank with secondary containment 18,000 gallon propane tank with secondary containment 6. If there will be washing of vehicles or equipment on site, indicate how the wash water will be contained. RESPONSE: N o washing of vehicles will occur on site. 7. If there will be floor drains, indicate how the fluids will be contained. RESPONSE: N o building or structures with floor drains are proposed. Besides fuel, no fluids are proposed to be handled or utilized as part of operations. 8. Indicate if there will be any air emissions (e.g. painting, oil storage, etc.). RESPONSE: Yes, kilns will produce air emissions. State air permitting with CDPHE will occur prior to operation. Please see attached emissions report, on pages 8-10 there is the summary for total emissions results for each kiln tested. Any visible emission (smoke) would be detailed there along with non -visible emissions. As you can see there were 0.0 visible emissions. The pyrolysis process designed by Biochar Now utilizes a sealed emissions flaring system. The propane fired emissions stack maintains a constant temperature, which was developed in conjunction with air emissions monitoring equipment to maintain minimal emission during the pyrolysis process and no visible emissions. The pyrolysis equipment remains sealed during the process and a vacuum is pulled on the system so there are no emissions from the pyrolysis equipment other than the emissions control stack. 9. Provide a design and operations plan if applicable (e.g. composting, landfills, etc.). RESPONSE: N/A 10. Provide a nuisance management plan if applicable (e.g. dairies, feedlots, etc.). RESPONSE: N/A 11. Additional information may be requested depending on the type of land use requested. RESPONSE: N o additional information was requested in pre -application meeting. Page 2 of 2 Addendum PUBLIC HEALTH COMMENTS: 1. Will the facility need to register as a recycler/end user with CDPHE Recycling/Beneficial Use Program? If so, please provide proof of registration. The facility will need to be registered as an Industrial Recycling Facility. This will be done prior to construction/operations on the site 2. Will the facility be taking treated wood? If so, are there concerns with storage of treated wood on bare ground? Also, will this complicate the CDPHE Air Permit that is required. Yes it will be taking treated wood. No there are not concerns with the storage as it will not sit on site for extended periods of time before being disposed. The CDPHE Air Permit will include treated wood and all of the testing for including treated wood in the air permit has been completed. See additional documents in the google drive link 3. Please provide proof of submittal for the CDPHE Air Permit. We will be submitting for the air permit prior to construction/operations on the site. This is a relatively expensive process and it does not make sense to submit for the air permits prior to approval of the USR. All of the data for treated wood air emissions tests have been done though. See the treated wood air emission test report provided 4. Will a Spill Prevention Control, and Countermeasures Plan (SPCC) be on site due to the diesel and propane tank? Yes SPCC will be on site for the tanks. We will consult with the diesel and propane tank manufactures on the appropriate SPCC and implement best practices. This will be addressed prior to construction. 5. What type of wood waste will the facility be accepting? I see wood pallets, but are there other specific types of wood material? (Treated wood for example). This facility will primarily take waste wood which will include treated wood. Wood pallets is an example of the type of wood that will be supplied by Republic, Vestas and others companies. 6. Will the BIOCHAR facility commit to the proposed mitigation methods listed in the Noise Study? Yes 7. Weld County EH will recommend that the facility implement these mitigation strategies to bring noise levels down due to nearby residential homes. Also, will the addition of the 8 -foot metal wall around the south and east side of the facility also help lower noise levels in addition to other mitigation that is suggested in the noise study? Yes BIOCHAR PROCESSING CR 6, LLC USE BY SPECIAL REVIEW (USR) COMMUNICATION PLAN JULY 1, 2024 Biochar Processing CR 6, LLC is pursuing a Use by Special. Review permit for a wood conversion facility, using kilns. In order to provide transparency and accountability to the surrounding property owners regarding this facility, Biochar will implement the following Communication Plan, as part of standard site operations. The objectives of the Communication Plan are to: • Initiate and maintain communication with nearby landowners. ■ Provide landowners along CR 6 with pertinent and timely information. ■ Identify and respond to landowner's issues as it relates to the proposed site. ■ Meet the requirements of Weld County Department of Planning Services. • Monitor, report and make public the effectiveness of this Plan. Communication Plan Details: Phase 1: Preliminary communication will be initiated by the Weld County Department of Planning Services, who will send mailed notice to the identified surrounding property owners within 500 feet of the proposed USR boundary. Any responses received back will be reviewed by Biochar and responded to, as warranted. Phase 2: Secondary communication will address the property owners included in the preliminary communication, as well as identified landowners outside of 500 feet of the proposed USR boundary and located along CR 6. To accomplish the above -stated objectives, the following strategies will be implemented: ■ This Communication Plan, which will be included in the publicly available USR application package, shall serve as Biochar's invitation to surrounding property owners to opt into an email distribution group that will be used to disseminate relevant updates and information. • Biochar will maintain an active email account to provide this information and to receive correspondence from the public. Currently, this email is: bob.demaree@kw.com, but may change as the operator group assumes control of the property. • For allthose surrounding property owners who wish to be actively informed as the facility develops and operates, they may email the above address, to be placed on a list of people who will received periodic emails when select construction activities are planned including the anticipated duration, when the site will begin operations, when any atypical site operations will occur, when any major changes to the site will occur and if the facility closes for an extended period of time, when operations will resume. • Biochar will conduct an annual review of landowners to search for and will contact additional landowners, if possible, for inclusion in the ongoing communications. ■ Biochar will post signage on the front of the property, adjacent to the primary access on County Road 6, including a 24/7 phone number of the site manager. Biochar is committed to maintaining open and active communications with Weld County and the landowners proximate to our operations. Biochar encourages surrounding landowners to solicit feedback, questions and concerns directly to Biochar, so we may quickly address legitimate problems in a timely and reasonable manner. While the code enforcement process will always remain available for neighboring residents to voice complaints, it is our intention to take this a step further by allowing the landowners to directly reach out to Biochar with concerns, as we want to maintain positive relationships with the community and act in good faith. Page 1 of 1 NGL / BIOCHAR FACILITY LOTS A & B OF RECORDED EXEMPTION 1471-28-01 RECX17-0182 IN THE NORTHEAST 1/4 OF SECTION 28, TOWNSHIP 1 NORTH, RANGE 66 WEST OF THE 6TH P.M. COUNTY OF WELD, STATE OF COLORADO. Preliminary Drainage Report Prepared for: Mr. Bob Demaree Biochar Processing CR 6 LLC 1142 Judson Street Longmont CO 80501 Email: bob. demaree a,kw. corn Prepared by: C IVILARTS Patrick K High, PE Ph: 303.682.1131 1500 Kansas Ave., Suite 2-E Longmont, Colorado 80501 CivilArts Project No. E437 Original Submittal: 05/29/2024 Revision #1 Submittal Date: 05/30/2024 Professional Engineers Certification County of Weld, Colorado Compliance Statement I Patrick E. High, Consultant Engineer for NGL/Biochar (Applicant), understand and acknowledge that the applicant is seeking land use approval of the case and parcel in the description above. I have designed or reviewed the design for the proposed land use set for in the application. I hereby certify, on behalf of the applicant, that the design will meet all applicable drainage requirements of the Weld County Code with the exception of the variance(s) described on the attached exhibits. This certification is not a guarantee or warranty either expressed or implied. Engineer's Stamp: Patrick E. High, Registered Professional Engineer State of Colorado No. 55300 (Affix Seal) - 2 - CivilArts, Inc. Table of Contents 1. Site Description...........................................................................................5- 6 A. Site Location Description B. Property Description C. Drainage description 2. Drainage Basin Description............................................................................7- 8 A. Major Drainage Basin B. Site Drainage Basins 3. Drainage Design Criteria..............................................................................8- 9-10 A. Regulation Applicability B. Site Planning and Constraints C. Hydrologic and Hydraulic Criteria D. Post Construction Stormwater Quality Criteria 4. DRAINAGE PLAN..............................................................................10-11 A. GENERAL CONCEPT B. SPECIFIC DETAILS 5. Stream, Wetland, and Waterbody Impacts..................... OOOOO . OOOOO . OOOOO . OOOOO .............12 A. Description of Floodplain Impacts B. Required modification studies. C. Applicable permits obtained. 6. Stormwater Conveyance Design................................................................... A. Description of proposed conveyance system B. Conveyance path to major drainageway and capacity evaluation C. Storm sewer, culvert, and inlet design D. Open channel design E. Outfall design F. Street drainage G. Easement requirements - 3 - CivilArts, Inc. H. Maintenance requirements 7. Detention and Post -Construction Stormwater Quality Design.. ..... ....... ..... ...........12- 13 A. Description of each proposed facility B. Description of design compliance with detention and water quality requirements C. Inlet design D. Basin and outlet design E. Description of vegetation coverage and planting plan F. Description of filter media selection and underdrain configuration G. Easement requirements H. Description of maintenance requirements 8. Conclusions........................................................................................................................1 A. Drainage plan effectiveness B. Compliance with requirements C. Exclusions and variances 9. References..........................................................................................................................1 A. Standards, criteria, guidance documents, master plans, and technical reports used. 10. Appendices.........................................................................................................................13-18 - 4 - CivilArts, Inc. 1. Site Description A. Site Location Description L City, county, section, township, range, and quarter section NGL Biochar is located within the Southwest corner of Northwest of Weld County Road 6. This property lies within a parcel of land in Section 28, Township 1 N, Range 66 West of the 6th principal meridian, County of Weld, State of Colorado. H. Site vicinity and legal boundaries map Locatin Map III. Adjacent developments and associated land use NGL Biochar is located at 14508 Weld County Road 6, Fort Lupton, 80621. The Surrounding developments are: At the North; Weld County RD 6. At the South, Private Propriety called Yarborough. At the East; Existing Private Property. At the West, Field used as agricultural. IV. Roadways located within or adjacent to the site. No roadways exist within the site. To the north is a public street, Weld County Road 6. B. Property Description I. Site area and proposed area of disturbance in acres The site area is 143,312 square feet or 32.9acres. The total disturbed area is 143,312 square feet or 32.9 acres. See drainage maps in the appendix. - 5 - CivilArts, Inc. II. Existing and proposed site uses. The existing site use is commercial, and the proposed site use is commercial. III. Land surface. IV. The existing land surface is field grass area and 3 buildings. V. Easements within or adjacent to the site Several public easements exist within the site for public utilities. C. Drainage Description I. Major and minor drainageways There are no major or minor drainageways adjacent to the site, but the water eventually drains to the Kalloga Lake at the corner of the NW of the Site. II. Natural drainage features The existing natural drainage features of the site are from the corner of the southeast to the northwest corner. The Pre -Development basin "EX - 1" contains 14.77 acres, basin "EX -2" contains 17.34 acres and basin "OS -1" contains 16 acres. The site is covered with grass and wet areas at slope ranging from 0 to 2%. This can be seen from a review of the Pre -Development Drainage Map prepared by CivilArts and located in the appendices. III. Irrigation ditches No irrigation ditches are within or adjacent to the site. IV. Regulatory floodplain extents No regulatory flood plains exist within the site or adjacent to the site. The site is in FEMA flood zone X and outside the 100 -year flood. The FEMA Map is. identified as FIRM Panel 08123C2120E; Effective date 01/20/2016. V. Known drainage issues. During our research, we did not find any adverse drainage issues associated with the site. VI. Hydrologic soil group map and description The Custom Soil Resource Report for the site shows the existing soils are classified as (46), 23.2% Olney fine sandy loam, 0 to 1 percent slopes, (47), 12.6% Olney fine sandy loam, 1 to 3 percent slopes, (56), 22.3% Renohill clay loam, 0 to 3 percent slopes, (75) 35.0% Vona sandy loam, 0 to 1 percent slopes, (76) 1.8% Vona sandy loam, 1 to 3 percent slopes, and (85) 5.2% Water. These soils are classified respectively as hydrologic soil group "B, D & A" and are described as Olney fine sandy loam, Olney fine sandy loam, Renohill clay loam, and Vona sandy loam. The current development is taking place on the well -drained Vona sandy loam Soil Group "A". The soils report is attached in the appendix and the on -site Pre -Development Drainage Map report is also attached. - 6 - CivilArts, Inc. VII. Geotechnical and groundwater site investigation results N/A. VIII. Preliminary infiltration Feasibility Screening results and map N/A 2. Drainage Basin Description A. Major Drainage Basin I. General description of major drainage basin characteristics and flow pattern The major drainage basin for the site will mimic the existing flow patterns of the historic drainage foi• the site. The site will continue to drain southwest to northeast towards. The existing site will continue to serve as a detention area. IL Flow conveyance from site to receiving major drainageway. N/A. III. Reference and description of applicable planning studies for the major drainageway This proposed drainage system conforms with the goals, policies, and standards. outlined in Weld County Code, Chapter "8" Public Works, Article XI "Storm Drainage." It also provides the required treatment and post development analysis. IV. Impact of site development on upstream and downstream properties We can certify that the impact of the site development on upstream and downstream. properties are negligible because we are limiting the post -development discharge and volume to be equal to or less than the pre -development discharge rate and volume. The pre & post development discharge, (CFS) for the 5-, 10-, and 100 -Year events are outlined in the appendices. B. Site Drainage Basins I. Existing and proposed basin and sub -basin characteristics for the site The existing and proposed basin and sub -basin characteristics for the site are shown on the drainage maps within this report. The weighted "C" values are listed in the appendix. II. Acceptance and conveyance of off -site storm water The existing property has passed through drainage from the south identified in this. report as OS -1. The city drainage records indicated 16 acres un-detained. pass -through drainage, with a 100 -year rate of approximately 5.84 CFS. Research of the site revealed an actual l6acre un-detained direct discharge. through the site. We have modeled the offsite discharge at 2% impervious. - 7 - CivilArts, Inc. with the C factors outlined in the Counties Drainage Manual. III. Overview of all existing and proposed stormwater facilities and rationale The overview of all existing and proposed stormwater facilities for the site and adjacent properties is overland flow which eventually transitions to shallow concentrated flow and is retained on -site. We plan to generally continue to maintain and improve in some cases the existing flow paths. 3. Drainage Design Criteria A. Regulation Applicability L Detention requirements This project will meet the Stormwater Quality Design Standard and performance metric from the Weld County Code, Chapter "8" Public Works, Article XI "Storm Drainage". IL Construction stormwater management requirements We will provide a construction and drainage plan that provides control measures. during construction that prevents or reduces the discharge of pollutants to downstream receiving waters of the State as described in Weld County Code, Chapter "8" Public Works, Article XI "Storm Drainage". III. Post — construction stormwater management requirements. The post — construction stormwater management requirements are to keep the pavement and swales free of debris and garbage/refuse/trash and to maintain the proposed underdrain free of obstructions so it may function as intended. This will enable the system to function as intended and comply with regulations currently adopted by the County of Weld and State of Colorado. IV. Stream, Wetland, and Waterbody Protection Requirements This project complies with Weld County Code, Chapter "8" Public Works, Article XI "Storm Drainage". V. Other applicable criteria and perm its. This project complies with Weld County Code, Chapter "8" Public Works, Article XI "Storm Drainage". B. Site Planning and Constraints L Description of previous drainage studies or master plans This proposed drainage system conforms with the goals, policies, and standards. - 8 - CivilArts, Inc. outlined in Weld County Code, Chapter "8" Public Works, Article XI "Storm Drainage." IL Description of site constraints caused by structures, utilities, etc. No site constraints are caused by structures, utilities, etc. III. Description of LID techniques utilized for stormwater management. N/A C. Hydrologic and Hydraulic Criteria L Design storms. The design storms that apply to this project are in accordance with Weld County Code, Chapter "8" Public Works, Article XI "Storm Drainage". The design storms analyzed in this report were the 2 -year minor storm and the 100 -year major storm. Also included is the 5, & 10 -year storm for reference. IL Runoff calculation methods The runoff calculation methods used were the rational formula. III. Detention storage and discharge calculation method The detention storage and discharge calculations were obtained from the Mile High Drainage District and current software used in the local industry. IV. Velocity and capacity calculation methods for inlets and conveyances The velocity and capacity calculations were obtained utilizing current accepted software. utilized by the Mile High Drainage District and local governments. V. Water surface profile and hydraulic grade line (HGL) calculation methods The water surface profile and hydraulic grade line calculation methods were obtained utilizing current accepted software utilized by the Mile High Drainage District and local governments. VI. Calculation method Rainfall data from the Mile High Flood District (MHFD) may be used as an alternative and are as follows: Point Precipitation Frequency Estimates (NOAA Atlas 14) 2 -Year 5 -Year 10 -Year 25 -Year 50 -Year 100 - Year P1 0.83 1.11 1.38 1.81 2.19 2.61 Per the Weld County Drainage Criteria, the rainfall intensities were calculated. using the following equation: 9 CivilArts, Inc. A = the area of the catchment tributary to the storage facility (acres) C = the runoff coefficient QPO = the calculated 5 -year or 10 -year historic runoff release rate from pond (CFS) Tc = the time of concentration for the tributary catchment (see the RUNOFF chapter) (minutes) P1 = the 1 -hour design rainfall depth (inches) at the site taken from the NOAA Atlas website using a site -specific gage, for the relevant return frequency storms. The calculations are best set up in a tabular (spreadsheet) form with each 5 -minute increment in duration being entered in rows and the following variables being entered, or calculated, in each column: 1. Storm Duration Time, T (minutes), up to 180 minutes. 2. Rainfall Intensity, I (inches per hour), calculated using Equation RA -3 from the RAINFALL chapter. 3. Inflow volume, Vi (cubic feet), calculated as the cumulative volume at the given storm duration using the equation: V1=CIA (60T) 4. Outflow adjustment factor m (Guo 1999a): M k1 -F) 0.5 <m<1 andT≥Tc 5. The calculated average outflow rate, Qav (CFS), over the duration T: Qav = mQpo 6. The calculated outflow volume, Vo, (cubic feet), during the given duration and the adjustment factor at that duration calculated using the equation: Vs V1 V0 The value of Vs increases with time, reaches a maximum value, and then starts to decrease. The maximum value of Vs is the required storage volume for the detention facility. D. Post Construction Stormwater Quality Criteria I. Selected treatm en t approach and design standards The selected treatment approach conforms with Weld County Code, Chapter "8" Public Works, Article XI "Storm Drainage". - 10 CivilArts, Inc. 4. DRAINAGE PLAN. A. GENERAL CONCEPT I. Conveyance offsite drainage and downstream outfalls The "Grading" Overall Utility and Drainage Plan for the building, there are 2 basins: DA -1 and DA -2. Runoff from drive immediately from those basins are conveyed to the proposed outfall inlet by proposed swale on our north property line. Our drainage plan is proposing to collect the stormwater runoff and attenuate the storm events while maintaining the existing outfall to the existing structure in the NW Corner of the Site. II. Coordination with surrounding developments We anticipate the only coordination with the surrounding developments will be as required by the Site Plan Approval process the County has in place. III. Detention ponding/water quality BMP plan, identify ownership and maintenance responsibilities. Water quality will be achieved by multiple avenues. There are swales on the north, west property boundaries of the site which will contribute to water quality treatment. Additionally, all on- site basins runoff will be treated in the CDS pollution control devices in the west and west swales before being routed into the underground detention system which is also manufactured by Contech. Detention will be achieved with the proposed 6 -barrel (48" diameter) Contech underground detention system. Runoff will be first treated in the north and west swales then collected and treated again by the CDS structure before being diverted to the underground system. Within the underground system, the 5 - year and 100 -year events will be detained and released at or below the allowable release rates for detention ponds established by the Weld County. Per Criteria manual, the 5 -year release rate IS 0.63 CFS/AC, and the 100 -year release rate is 0.72 CFS/AC both for Vona Hydrologic soil group "A" soils. Therefore, the allowable discharge rate for the combined site (including offsite OS1 to the south) from the pond is: Storm Event = Allowable 5 Year = (32.90+4.90) x 0.63 = 100 Year = (32.90+4.90) x 0.72 23.80 CFS 23.70 CFS B. SPECIFIC DETAILS I. Existing and Proposed subbasin descriptions The Existing Drainage Map shows the following drainage areas: The first existing drainage area is EX -1 is a 32.90 AC area (impervious area=2%, Q100yr= 17.41 CFS) consisting of a vacant lot which generally flows from southeast to northwest and also has a tributary offsite flow from the west which is designated EX -1 on the Existing Drainage Map. The next drainage area is EX -2 = 2.30 AC (impervious area=2%, Q100= 1.27 CFS) which is located in - 11 CivilArts, Inc. the north ROW of the property. portion of the vacant lot where stormwater generally flows from east to northwest into the ROW of Weld County Road 19. In total, the total onsite area = 32.90 acres. The Existing Drainage Map shows the design point discharge P1 located at the point of discharge near the existing outfall structure located in the NW of the site. The Proposed Drainage Map shows the following drainage areas: The first post drainage area is DA -1 is a 32.90 AC area (impervious rea=81.0%, Q100yr== 113.5 5 cfs) consisting of a vacant lot which generally flows from southeast to northwest and also has a tributary offsite flow from the west which is designated DA -1 on the post Drainage Map. The next drainage area is DA -2 = 17.0 AC (impervious area=81.0%, Q100= 76.17 CFS) which is in the north ROW of the property. portion of the vacant lot where stormwater generally flows from east to northwest into the ROW of Weld County Road 19. In total, the total onsite area = 42.70 acres. The Existing Drainage Map shows the design point discharge P1 and P2 all located at the point of discharge near the existing outfall structure located in the NW of the site. 5. Stream, Wetland, and Waterbody Impacts A. Description of floodplain impacts N/A B. Required modification studies. N/A C. Applicable permits obtained. N/A 6. Stormwater Conveyance Design A. Description of proposed conveyance system Proposed grass buffer and on -site swale including underdrain for the treatment of stormwater runoff. See calculations and drainage plan in appendix. B. Conveyance path to major drainageway and capacity evaluation. Proposed on -site swale including to the depression area and conveyance. See calculations and drainage plan in appendix. C. Storm sewer, culvert, and inlet design N/A D. Open channel design See grass swale design in appendix. E. Outfall design N/A F. Street design N/A G. Easement requirements Easements will be provided if required. H. Maintenance requirements Easements will be provided if required. 7. Detention and Post Construction Stormwater Quality Design - 12 CivilArts, Inc. A. Description of each proposed facility Grass swale and underdrain as described in the drainage calculations and drainage plan found in the appendix. B. Description of design compliance with detention and water quality requirements The design meets the water quality standards set forth in Chapter 7 (CBDCS) and sound engineering principals. C. Inlet design N/A D. Basin and outlet design N/A E. Description of vegetation coverage and planting plan All disturbed areas shall be sodded and/or planted as shown on the plans and specifications found in the appendix. F. Description of filter media selection and underdrain configuration N/A G. Easement requirements Easements will be provided if required. 8. Conclusions A. Drainage plan effectiveness The proposed drainage plan meets the standards set forth in the Weld County Code, Chapter "8" Public Works, Article XI "Storm Drainage". The pre -development discharge rate and volume is approximately equivalent to the post -development rate and volume and therefore treatment is the only requirement. B. Compliance with requirements The proposed drainage plan and calculations comply with the standards set forth in Weld County Code, Chapter "8" Public Works, Article XI "Storm Drainage". C. Exclusions and variances N/A 9. References A. Standards, criteria, guidance documents, master plans, and technical reports used. 1. Weld County Design and Construction Standards. 2. United States Department of Agriculture, Natural Resources and Conservation Service (NRCS), May 2022, Web Soil Survey 3. Mile High Flood District, (USDCM) (Vol 1-2-3) 4. Colorado Discharge Permit System (CDPS) General Permit — Stormwater discharges associated with construction activities. 10. Appendices A. AFEMA — FIRMETTE B. Critical references information copied to create standalone document. - 13 CivilArts, Inc. C. Hydrologic calculations and tables D. Hydraulic calculations E. SOILS REPORT - 14 CivilArts, Inc. FEMA FIRMETTE PER THE FEMA FLOOD INSURANCE RATE MAPS (FIRM), MAP NO. 08005C0186K, HAVING A MAP REVISED DATE OF DEC. 17, 2010, INDICATES THE SUBJECT PROPERTY TO BE DESIGNATED AS ZONE X (OUTSIDE 0.2% CHANCE OF FLOOD) - 15 CivilArts, Inc. You can choose a new food map or move the location pin by selecting a l Brent location on the locator map b oo w or by entering a Go To new location in the search _field above, It may take a minute or more during peck hours to generate a dynamic P '+ 'et te, NFHL Viewer ),) Estli, USDA Perm Se t,a;ca Agency, Microi,oft Powered by Esri Pill MAP PANELS OTHER AREAS L f- friciticasnsi MVO Apprceolnate locatxmi based O.Ole Mpg arid Elm Not raprSEM efki but .l °rwtatikfe pinr►y^ fl Sitiiezed Dckurldarri Digital vita A',4 ab% So Ahariiabie Ilumappied Anti rzrr Minarmafl Fkk•d K1 *rid :D -EC Elf tarot LOWS Ala or imam:mated Word !Had Ociteeialse P tea k ea Ccagail Omer ResourceSystem T• 1/20/2016 Not Printe:datin SPECIAL FLOOD 'HAZARD AR LAS Jlthout Nat Mod E ll (StEp Ititaid A M. soft With ergot Depth Regalatory liustatay ansaitetkratt, vita OTHER AREA OF FISOO HAZARD 0.2% Annual Chance Rood Haza rd. Areas r ' 1% annual chance 'Mood ' th average !dp h Ins then one toot or with drainage nee or kiss than one totem mAla z -it Fauns Cometthors 1% Annual Chance Hood Hag! 2 4 Itter Area with h�I used Fl:&d Risk due to a Loa See Now a r Area with Flood Rica due to Levee OTHER FEATURES GENERAL STRUCTURES ICJ Cross Sections wIMh1% Annual Chance 175 'aver Surface Ul e+w'at)o n Coastal Waimea Sar floc Effmticin Lire (JIVED Unit of Study Jurledicilon Boundary -- ® 00314alihrsempetBawer Prairie Baseline tHydrographic Feature - Channel_ Culvert or Storm Sewrr slim A Levee Vie. or Filoodwal Copies of Graphs, Tables, and Nomographs Used - 16 CivilArts, Inc. TABLE 1 RUNOFF COEFFICIENTS AND PERCENTS IMPERVIOUS LAND CHARACTERISTICS USE OR SURFACE PERCENT IMPERVIOUS FREQUENCY 2 5 10 100 Business: Areas Areas 95 85 .87 .60 .87 .65 .88 .70 .89 .80 Commercial Neighborhood Residential: (detached) (attached) or (**) Larger (*) 60 75 (*) 80 .40 .45 .60 .30 .65 .45 .50 .65 .35 .70 • .50 .60 .70 .40 .70 .60 .70 .80 .60 .80 Single Acre -Family -Unit -Unit Lot Multi Multi 1/2 Apartments Industrial: 80 90 .• .71 .80 .72 .80 .76 .85 .82 .90 Light Heavy Areas Areas Parks, Cemeteries 5 .10 .10 .35 .60 Playgrounds 10 .15 .25 .35 .65 Schools 50 .45 .50 .60 .70 Railroad Yard Areas 15 .40 _ .45 .50 .60 Undeveloped Areas: defined) 2 45 .43 .47 (See "Lawns") .55 .65 Historic Greenbelts, Off (when -Site land Flow Flow Analysis, Agricultural Analysis use not 9.2010 TABLE 1 (continued) RUNOFF COEFFICIENTS AND PERCENTS IMPERVIOUS PERCENT IMPERVIOUS FREQUENCY LAND CHARACTERISTICS USE OR SURFACE _ 2 5 10 100 Streets: 100 40 _ .87 .15 .88 _ .25 .90 .35 .93 .65 Paved Gravel _ Concrete Drive and Walks 96 .87 .87 .88 .89 Roofs 90 .80 .85 .90 .90 Lawns, Sandy Soil (A and B Soils): 2 .05 .10 .15 .06 .11 .1 d .08 .13 .18 .10 .15 .20 2% Slope 2-7% >7% Slope Slope Lawns, Clay Soil (C and D Soils): 5 .13 .18 .25 .14 .19 .27 .15 .20 .30 .17 .22 .35 2% Slope 2-7% >7% Slope Slope NOTE: These Rational Formula coefficients may not be valid for large basins (*)See Figures RO-3 through RO-5 of USDCM Volume 1 for percent impervious. (**)Up to 5 units per acre. Single-family with more than 5 units per acre, use values for multi- unit/detached • 9.2010 TABLE 2 Roughness Coefficients ("n") for Channel Design (after Chow 1959) Channel Type Roughness Coefficient (n) Minimum Typical Maximum I. Excavated 1. Earth, or straight Dredged and uniform a. Gravel, uniform section, clean 0.022 0.025 0.030 b. With short grass, few weeds 0.022 0.027 0.033 2. Earth, winding and sluggish a. Grass, some weeds 0.025 0.030 0.033 b. Dense weeds or aquatic plants 0.030 0.035 0.040 c. Earthy 3. Channels not bottom maintained, and rubble/riprap weeds and brush sides uncut 0.028 0.030 0.035 a. Dense weeds, high as flow depth 0.050 0.080 0.120 b. Clean bottom, brush on sides 0.040 0.050 0.080 streams (top width at flood stage 140 ft) II. Natural 1. Streams on plain a. Clean, straight, full stage, no rifts or deep pools 0.025 0.030 0.033 b. Clean, and stones winding, some pools and shoals, some weeds 0.035 0.045 0.050 c. Very heavy weedy stand reaches, of timber deep and pools, underbrush or floodways with 0.075 0.100 0.150 or Built -Up Channels III. Lined 1. Concrete a. Towel/float finish 0.011 0.015 0.016 b. Shotcrete 0.016 0.020 0.025 2. Gravel bottom with sides of: a. Formed concrete 0.017 0.020 0.025 b. Random stone in mortar 0.020 0.023 0.026 c. Dry rubble or riprap 0.023 0.033 0.036 3. Wetland Bottom Channels See Figure 6 4. Grass -Lined Channels and Swales See Figure 7 (Source: USDCM, Volume 1, Maior Drainage, 04/2008) 9.2010 TABLE 2 (continued) Large Conduits: Concrete: Manning's n Precast concrete pipe, ordinary joint alignment 0.013 Poured in place, steel forms, projections 1/8" less or 0.013 Poured projections in place, smooth wood forms, 1/8" or less 0.013 Poured in place, ordinary work with steel forms 0.014 Poured in place, forms ordinary work with wood 0.015 Steel: Structural 5' to 20' diameter plate corrugated, 2"x6" corrugations, 0.0377 x,0.078 Corrugated diameter pipe, 1 "x3" corrugations, 3' to 8' 0.0306 D0.075 Plastic/HOPE: Pipe with smooth interior wall 0.012 9.2010 C P z z d 2 0.5 0.4 02 0,2 0.1 .08 .06 .05 _04 .03 020.1 0.2 0.3 0.4 0.5 0.6 0.8 1.0 2 Channel design capacity curve ii /-- / - (c) - Fetardance tpij1 11 o / II Limiting velocity design curve 3 4 5 6 6 10 20 30 VR, PRODUCTOF VELOCITYAND HYDRAULIC RADIUS From "Handbook of Channel Design For Soil and Water Conservation,: U.S. Department of Agriculture, Soils Conservation Service, No. SCS-TP-61 March, 1947, Rev. June, 1954 Figure MD-9b—Manning's n vs. VR for Two Retardances in Grass -Lined Channels. (Source: USDGM, Volume, Major Drainage, 04/2008) FIGURE 7 9.2010 NOAA Rainfall Tables - 17 CivilArts, Inc. 3/4/24, 12:19 PM Precipitation Frequency Data Server NOAA Atlas 14, Volume 8, Version 2 Location name: Fort Lupton, Colorado, USA* Latitude: 40.0295°, Longitude: -104.7797° Elevation: 5047 ft** * source: ESRI Maps ** source: USGS POINT PRECIPITATION FREQUENCY ESTIMATES Sanja Perica, Deborah Martin, Sandra Pavlovic, Ishani Roy, Michael St. Laurent, Carl Trypaluk, Dale Unruh, Michael Yekta, Geoffery Bonnin NOAA, National Weather Service, Silver Spring, Maryland PF tabular I PF _ graphical I Maps & aerials PF tabular PDS-based point precipitation frequency estimates with 90% confidence intervals (in inches)1 Duration 5 -min 10 -min 15 -min 30 -min 60 -min 2 -hr 3 -hr 6 -hr 12 -hr 24 -hr 2 -day I _ Average recurrence interval (years) 1 2 0.230 (0.177-0.299) 0.337 (0.259-0.438) 0.411 (0.316-0.535) 0.281 (0.216-0.366) 0.411 (0.316-0.535) 0.502 (0.386-0.653) 0.562 (0.433-0.731) 0.681 (0.524-0.886) 0.687 (0.528-0.893) 0.811 (0.631-1.04) 0.878 (0.687-1.12) 1.04 (0.822-1.31) 0.831 (0.638-1.08) 0.980 (0.761-1.26) 1.06 (0.825-1.35) 1.23 (0.973-1.56) 1.28 (1.02-1.60) 1.49 (1.19-1.86) 1.52 (1.23-1.88) 1.73 (1.41-2.12) 3 -day 1.89 (1.55-2.29) 4 -day 7 -day 10 -day 20 -day 30 -day 45 -day 60 -day 2.02 (1.66-2.44) 2.31 (1.92-2.76) 2.56 (2.14-3.04) 3.27 (2.77-3.84) 3.84 (3.27-4.48) 4.52 (3.87-5.23) 5.07 (4.36-5.84) 1.80 (1.45-2.22) 2.10 (1.71-2.57) 2.26 (1.86-2.75) 2.39 (1.97-2.88) 2.69 (2.24-3.22) 2.96 (2.47-3.52) 3.74 (3.15-4.39) 4.37 (3.71-5.10) 5.15 (4.41-5.97) 5.81 (4.99-6.70) 5 10 25 0.377 (0.289-0.492) 0.552 (0.423-0.720) 0.674 (0.516-0.878) 0.909 (0.697-1.19) 1.11 (0.849-1.44) 1.31 (1.01-1.69) 1.40 (1.09-1.80) 1.61 (1.27-2.04) 1.90 (1.51-2.38) 2.29 (1.84-2.83) 2.72 (2.20-3.33) 2.89 (2.36-3.52) 3.01 (2.47-3.65) 3.34 (2.76-4.00) 3.64 (3.03-4.33) 4.50 (3.78-5.30) 5.23 (4.43-6.11) 6.17 (5.26-7.17) , 6.99 (5.99-8.08) 0.470 (0.358-0.615) 0.688 (0.524-0.901) 0.839 (0.639-1.10) 1.13 (0.861-1.48) 1.38 (1.05-1.80) 1.63 (1.25-2.11) 1.75 (1.35-2.25) 1.98 (1.55-2.52) 2.29 (1.81-2.89) 2.73 (2.18-3.40) 3.24 (2.62-3.99) 3.43 (2.79-4.19) 3.55 (2.90-4.31) 3.89 (3.20-4.68) 4.21 (3.48-5.03) 5.13 (4.30-6.06) 5.94 (5.00-6.97) 7.00 (5.94-8.16) 7.94 (6.77-9.20) 1 0.615 (0.463-0.856) 0.901 (0.678-1.25) 1.10 (0.827-1.53) 1.48 (1.12-2.06) 1.81 (1.36-2.52) 2.14 (1.63-2.95) 2.30 (1.76-3.14) 2.58 (1.99-3.48) 2.92 (2.28-3.88) 3.41 (2.67-4.44) 3.99 (3.13-5.07) 4.19 (3.31-5.28) 4.31 (3.42-5.40) 4.67 (3.74-5.79) 5.01 (4.03-6.16) 6.01 (4.88-7.27) 6.90 (5.64-8.28) 8.12 (6.66-9.64) 9.20 (7.58-10.9) 50 0.743 (0.543-1.04) 1.09 (0.795-1.52) 1.33 (0.969-1.85) 1.79 (1.31-2.50) 2.19 (1.60-3.07) 2.59 (1.92-3.59) 2.78 (2.07-3.82) 3.10 (2.33-4.21) 3.47 (2.63-4.64) 3.98 (3.04-5.22) 4.59 (3.52-5.89) 4.80 (3.70-6.10) 4.92 (3.82-6.23) 5.29 (4.15-6.63) 5.65 (4.45-7.02) 6.69 (5.32-8.19) 7.65 (6.12-9.27) 8.96 (7.21-10.8) 10.1 (8.19-12.1) 100 200 500 0.883 (0.624-1.26) 1.29 (0.913-1.85) 1.58 (1.11-2.25) 2.13 (1.50-3.04) 2.61 (1.85-3.73) 3.10 (2.21-4.37) 3.32 (2.39-4.65) 3.68 (2.68-5.10) 4.08 (2.99-5.56) 4.60 (3.40-6.14) 5.20 (3.87-6.81) 5.42 (4.05-7.03) 5.55 (4.17-7.17) 5.93 (4.50-7.58) 6.30 (4.81-7.98) 7.38 (5.69-9.21) 8.39 (6.51-10.4) 9.78 (7.63-12.0) 11.1 (8.66-13.4) 1.04 (0.705-1.52) 1.52 (1.03-2.22) 1.85 (1.26-2.71) 2.50 (1.70-3.66) 3.08 (2.09-4.51) 3.66 (2.51-5.28) 3.92 (2.71-5.62) 1.26 (0.826-1.89) 1.85 (1.21-2.77) 2.26 (1.48-3.38) 3.06 (2.00-4.57) 3.77 (2.46-5.64) 4.48 (2.96-6.61) 4.80 (3.19-7.04) 4.34 (3.03-6.14) 5.29 (3.56-7.65) 4.75 (3.35-6.62) 5.26 (3.74-7.19) 5.84 (4.18-7.82) 5.73 (3.90-8.17) 6.20 (4.25-8.68) 6.71 (4.63-9.20) 6.06 (4.37-8.05) 6.94 (4.82-9.43) 6.20 (4.49-8.19) 7.10 (4.96-9.59) 6.60 (4.82-8.62) 6.97 (5.12-9.03) 8.08 (6.00-10.3) 9.13 (6.82-11.5) 10.6 (7.96-13.2) 11.9 (9.01-14.8) 7.51 (5.29-10.0) 7.88 (5.59-10.4) 9.02 (6.46-11.7) 10.1 (7.29-13.0) 11.6 (8.45-14.9) 13.1 (9.53-16.6) 1000 1.45 (0.918-2.17) 2.12 (1.34-3.18) 2.59 (1.64-3.88) 3.51 (2.22-5.26) 4.33 (2.74-6.49) 5.16 (3.30-7.62) 5.53 (3.56-8.11) 6.08 (3.96-8.80) 6.55 (4.31-9.34) 6.97 (4.64-9.80) 7.38 (4.97-10.2) 7.62 (5.16-10.5) 7.79 (5.31-10.6) 8.21 (5.65-11.1) 8.58 (5.94-11.5) 9.73 (6.81-12.8) 10.8 (7.64-14.2) 12.4 (8.82-16.1) 13.9 (9.92-17.9) 1 Precipitation frequency (PF) estimates in this table are based on frequency analysis of partial duration series (PDS). Numbers in parenthesis are PF estimates at lower and upper bounds of the 90% confidence interval. The probability that precipitation frequency estimates (for a given duration and average recurrence interval) will be greater than the upper bound (or less than the lower bound) is 5%. Estimates at upper bounds are not checked against probable maximum precipitation (PMP) estimates and may be higher than currently valid PMP values. Please refer to NOAA Atlas 14 document for more information. Back to Top PF graphical https://hdsc.nws.noaa.gov/pfds/pfds_printpage.html?Iat=40.0295&Ion=-104.7797&data=depth&units=english&series=pds 1/4 3/4/24, 12:19 PM Precipitation Frequency Data Server Precipitation depth (in) Precipitation depth (in) 14 12 10► a 6 4 2 0 14 12 10 PDS-based depth -duration -frequency (DOH curves Latitude: 40.0295 °, Longitude: -104.7'797' ' I - a In 5 10 25 50 100 200 NOM Atra; 14r Volume 6, Version., 2 .E 1' l t c to lab Duration L. 4 y� R�p 1CD NM V 0 VI Air 1• J 4 Average recurrence interval (years) C C. . ID t_ o tt 1 reacted tiSMTi Back to Top Maps & aerials Small scale terrain 6 6 6 500 1000 Mon Mar 4 19 H 11 262:i. Amerage recurrence interval Nrinrs) 1 2 5 10 25 50 100 200 500 1000 Duration Se - 5 -min 1 ail/�y 15 -min 3l -ruin 2 -hr 3-4ir 5 -hr 12-11 r 24-4 r 2 -day — _3 -day 4 -day 7 -day 20 -day 30 -day 60 -day https://hdsc. nws.noaa.gov/pfds/pfds_printpage.html?lat=40.0295&Ion=-104.7797&data=depth&units=english&series=pds 2/4 3/4/24, 12:19 PM Precipitation Frequency Data Server tis Pit g l ker Icer 3km 2m1 i • i Baseline Rd Large scale terrain 100km 1 60mi t_oioraao ri+JE u N Large scale map L ..• 100km 1 I 60mi hey inn rn S Greeley a Long, ont i D cirri er ler *fa do peon gs Large scale aerial https://hdscenws.noaa.gov/pfds/pfds_printpage.htmPlat=40.02958don=-104.77978tdata=depth&units=english&series=pds 3/4 3/4/24, 12:19 PM Precipitation Frequency Data Server Back to Top US Department of Commerce National Oceanic and Atmospheric Administration National Weather Service National Water Center 1325 East West Highway Silver Spring, MD 20910 Questions?: HDSC.Questions@noaa.gov Disclaimer https://hdscenws.noaa.gov/pfds/pfds_printpage.html?lat=40.02958don=-104.77978tdata=depth&units=english&series=pds 4/4 Hydrological Caics -18 CivilArts, Inc. Area -Weighted Runoff Coefficient Calculations Version 2.00 released May 2017 Designer: Patrick E. High Company: CivilArts Date: 4/3/2024 Project: NGL BIOCHAR (Pre -Development) Location: 14508 Weld County Road 6, Fort Lupton, 80621. Subcatchment Name LE STD : Flow Direction Gatos eat Bar Cells of this color are for required user -input Cells of this color are for optional override values Cells of this color are for calculated results based on overrides See sheet "Design Info" for imperviousness -based runoff coefficient values. Sub -Area ID Area (ac) NRCS Hydrologic Soil Group Imperviousness Percent Runoff Coefficient, C 2-yr 5-yr 10-yr 25-yr 50-yr 100-yr 500-yr EX -1 14.77 A 20.0 0.10 0.11 0.12 0.14 0.20 0.27 0.38 EX -2 17.34 A 2.0 0.01 0.01 0.01 0.01 0.04 0.13 0.27 OS -1 16.00 A 2.0 0.01 0.01 0.01 0.01 0.04 0.13 0.27 Total Area (ac) 48.11 Area -Weighted C Area -Weighted Override C 0.04 0.04 0.04 0.05 0.09 0.17 0.30 0.04 0.04 0.04 0.05 0.09 0.17 0.30 PRE-DEVELOPMENTUD-WORKBOOK-UD-RATIONAL-2.00.xlsm, Weighted C 4/3/2024, 12:47 PM Calculation of Peak Runoff using Rational Method Designer: Company: Patrick E. High CivilArts Date: 4/3/2024 Project: Location: NGL BIOCHAR (Pre -Development) 14508 Weld County Road 6, Fort Lupton, 8 Version 2.00 released May 2017 Cells of this color are for required user -input Cells of this color are for optional override values Cells of this color are for calculated results based on overrides 0.395(1.1 - C5)y+Li 50.33 t _ Lt _ Lt tt 60K St 60Vt Computed tc = ti + tt Regional t, = (26 — 17i) + 60(14i + 9)A tminimum ( ban) tminimum®-(loon-urban) Selected tc, = max{tminimum , min(Computed , Regional tc) 4 Select UDFCD location for NOAA Atlas 14 Rainfall Depths from the pulldown list OR enter your own depths obtained from the NOAA website (click this link) 2-yr 5-yr 10-yr 25-yr 50-yr 100-yr 500-yr 1 -hour rainfall depth, P1 (in) = Rainfall Intensity Equation Coefficients = 0.83 1.11 1.38 1.81 2.19 2.61 3.77 a b c 28.50 10.00 0.786 I(in/hr) _ a*P1 (b + tc)y Q(cfs) = CIA Subcatchment Name Area (ac) NRCS Hydrologic Soil Group Percent mperviousness Runoff Coefficient, C Overland (Initial) Flow Time Channelized (Travel) Flow Time Time of Concentration Rainfall Intensity, I (in/hr) Peak Flow, Q cfs) 2-yr 5-yr 10-yr 25-yr 50-yr 100-yr 500-yr Overland Flow Length L; (ft) U/S Elevation (ft) (Optional) D/S Elevation (ft) (Optional) Overland Flow Slope Si (ft/ft) Overland Flow Time t; (min) Channelized Flow Length Lt (ft) U/S Elevation (ft) (Optional) D/S Elevation (ft) (Optional) Channelized Flow Slope St (ft/ft) NRCS Conveyance Factor K Channelized Flow Velocity Vt (ft/sec) Channelized Flow Time tt (min) Computed tc (min) Regional tc (min) Selected tc (min) 2-yr 5-yr 10-yr 25-yr 50-yr 100-yr 500-yr 2-yr 5-yr 10-yr 25-yr 50-yr 100-yr 500-yr EX -1 14.77 A 20.0 0.10 0.11 0.12 0.14 0.20 0.27 0.38 300.00 0.012 29.14 857.00 0.012 7 0.77 18.63 47.77 33.65 33.65 1.21 1.63 2.02 2.65 3.21 3.82 5.52 1.84 2.65 3.59 5.67 9.28 15.01 31.24 EX -2 17.34 A 2.0 0.01 0.01 0.01 0.01 0.04 0.13 0.27 300.00 0.012 32.22 1268.00 0.012 7 0.77 27.56 59.78 46.45 46.45 0.99 1.33 1.65 2.17 2.62 3.12 4.51 0.09 0.13 0.20 0.41 1.91 6.80 20.88 OS -1 16.00 A 2.0 0.01 0.01 0.01 0.01 0.04 0.13 0.27 300.00 0.012 3222 1600.00 0.012 7 0.77 34.78 66.99 51.89 51.89 0.92 1.24 1.54 2.02 2.44 2.91 4.20 0.08 0.12 0.17 0.35 1.64 5.84 17.92 PRE -DEVELOPMENT DRAINAGE RUNOFF SUMMARY DESIGN POINTS DRAINAGE BASINS Hydrologic Group Soil AREA (AC) IMPERVIOUS (%) C2 CS C10 C100 Q2 CFS Q5 CFS Q10 CFS Q100 CFS P1 EX -1 A 25.7 20 0.10 0.11 0.12 0.27 1.84 2.65 3.59 15.01 P2 EX -2 A 17 2 0.01 0.01 0.01 0.13 0.09 0.13 0.20 6.80 P3 OS -1 A 16 2 0.01 0.01 0.01 0.13 0.08 0.12 0.17 5.84 Area -Weighted Runoff Coefficient Calculations Version 2.00 released May 2017 Designer: Patrick E. High Company: CivilArts Date: 4/3/2024 Project: NGL BIOCHAR (Post -Development) Location: 14508 Weld County Road 6, Fort Lupton, 80621. Subcatchment Name LE STD : Flow Direction Gatos eat Bar Cells of this color are for required user -input Cells of this color are for optional override values Cells of this color are for calculated results based on overrides See sheet "Design Info" for imperviousness -based runoff coefficient values. Sub -Area ID Area (ac) NRCS Hydrologic Soil Group Imperviousness Percent Runoff Coefficient, C 2-yr 5-yr 10-yr 25-yr 50-yr 100-yr 500-yr DA -1 14.30 A 20.0 0.10 0.11 0.12 0.14 0.20 0.27 0.38 DA -2 17.90 A 41.0 0.26 0.28 0.29 0.32 0.38 0.43 0.52 OS -1 16.00 A 2.0 0.01 0.01 0.01 0.01 0.04 0.13 0.27 Total Area (ac) 48.20 Area -Weighted C Area -Weighted Override C 0.13 0.14 0.15 0.17 0.21 0.28 0.39 0.13 0.14 0.15 0.17 0.21 0.28 0.39 POST-DEVELOPMENT-UD-WORKBOOK-2.00.xlsm, Weighted C 4/3/2024, 12:53 PM Calculation of Peak Runoff using Rational Method Designer: Company: Patrick E. High CivilArts Date: 4/3/2024 Project: Location: NGL BIOCHAR (Post -Development) 14508 Weld County Road 6, Fort Lupton, 8 Version 2.00 released May 2017 Cells of this color are for required user -input Cells of this color are for optional override values Cells of this color are for calculated results based on overrides 0.395(1.1 - C5)y+Li 50.33 t _ Lt _ Lt tt 60K St 60Vt Computed tc = ti + tt Regional t, = (26 — 17i) + 60(14i + 9)A tminimum ( ban) tminimum®-(loon-urban) Selected tc, = max{tminimum , min(Computed , Regional tc) 4 Select UDFCD location for NOAA Atlas 14 Rainfall Depths from the pulldown list OR enter your own depths obtained from the NOAA website (click this link) 2-yr 5-yr 10-yr 25-yr 50-yr 100-yr 500-yr 1 -hour rainfall depth, P1 (in) = Rainfall Intensity Equation Coefficients = 0.83 1.11 1.38 1.81 2.19 2.61 3.77 a b c 28.50 10.00 0.786 I(in/hr) _ a*P1 (b + tc)y Q(cfs) = CIA Subcatchment Name Area (ac) NRCS Hydrologic Soil Group Percent mperviousness Runoff Coefficient, C Overland (Initial) Flow Time Channelized (Travel) Flow Time Time of Concentration Rainfall Intensity, I (in/hr) Peak Flow, Q cfs) 2-yr 5-yr 10-yr 25-yr 50-yr 100-yr 500-yr Overland Flow Length L; (ft) U/S Elevation (ft) (Optional) D/S Elevation (ft) (Optional) Overland Flow Slope Si (ft/ft) Overland Flow Time t; (min) Channelized Flow Length Lt (ft) U/S Elevation (ft) (Optional) D/S Elevation (ft) (Optional) Channelized Flow Slope St (ft/ft) NRCS Conveyance Factor K Channelized Flow Velocity Vt (ft/sec) Channelized Flow Time tt (min) Computed tc (min) Regional tc (min) Selected tc (min) 2-yr 5-yr 10-yr 25-yr 50-yr 100-yr 500-yr 2-yr 5-yr 10-yr 25-yr 50-yr 100-yr 500-yr DA -1 14.30 A 20.0 0.10 0.11 0.12 0.14 0.20 0.27 0.38 300.00 0.015 27.07 857.00 0.010 7 0.70 20.40 47.47 34.70 34.70 1.19 1.60 1.98 2.60 3.15 315 5.42 1.75 2.52 3.41 5.39 8.82 14.26 29.69 DA -2 17.90 A 41.0 0.26 0.28 0.29 0.32 0.38 0.43 0.52 300.00 0.015 22.54 1268.00 0.010 7 0.70 30.19 52.73 33.37 33.37 1.21 1.63 2.03 2.67 3.22 3.84 5.55 512 8.07 10.59 15.48 21.65 29.54 51.52 OS -1 16.00 A 2.0 0.01 0.01 0.01 0.01 0.04 0.13 0.27 300.00 0.012 3222 1600.00 0.012 7 0.77 34.78 66.99 51.89 51.89 0.92 1.24 1.54 2.02 2.44 2.91 4.20 0.08 0.12 0.17 0.35 1.64 5.84 17.92 Hydraulic Calcs - 19 CivilArts, Inc. AREA INLET IN A TRAPEZOIDAL GRASS -LINED CHANNEL BIOCHAR Basin OS -1, Design Point (P-3) anIN J TMAX T Ci SE - a I d Grass Type Limiting Manning's n A 0.06 B 0.04 C 0.033 D 0.03 E 0.024 Analysis of Trapezoidal Grass -Lined Channel Using SCS Method NRCS Vegetal Retardance (A, B, C, D, or E) Manning's n (Leave cell D16 blank to manually enter an n value) Channel Invert Slope Bottom Width Left Side Slope Right Side Slope Check one of the following soil types: Soil Type: Sandy Non -Sandy Max. Velocity (VMAx) 5.0 fps 7.0 fps Max Froude No. (FMAx) 0.50 0.80 Max. Allowable Top Width of Channel for Minor & Major Storm Max. Allowable Water Depth in Channel for Minor & Major Storm A, B, C, D or E n= So = B= Z1 = Z2 = TMAX = dMAx = C see details below 0.0080 0.00 3.00 3.00 rr Choose One: O Sandy Non -Sandy ft/ft ft ft/ft ft/ft Minor Storm Major Storm 6.00 12.00 1.00 2.00 feet feet Maximum Channel Capacity Based On Allowable Top Width Max. Allowable Top Width Water Depth Flow Area Wetted Perimeter Hydraulic Radius Manning's n based on NRCS Vegetal Retardance Flow Velocity Velocity -Depth Product Hydraulic Depth Froude Number Max. Flow Based On Allowable Top Width Maximum Channel Capacity Based On Allowable Water Depth Max. Allowable Water Depth Top Width Flow Area Wetted Perimeter Hydraulic Radius Manning's n based on NRCS Vegetal Retardance Flow Velocity Velocity -Depth Product Hydraulic Depth Froude Number Max. Flow Based On Allowable Water Depth Allowable Channel Capacity Based On Channel Geometry MINOR STORM Allowable Capacity is based on Depth Criterion MAJOR STORM Allowable Capacity is based on Depth Criterion Water Depth in Channel Based On Design Peak Flow Design Peak Flow Water Depth Top Width Flow Area Wetted Perimeter Hydraulic Radius Manning's n based on NRCS Vegetal Retardance Flow Velocity Velocity -Depth Product Hydraulic Depth Froude Number Minor storm max. allowable capacity GOOD - greater than flow given on sheet 'Q -Peak' Major storm max. allowable capacity GOOD - greater than flow given on sheet 'Q -Peak° Trim = d= A= P= R= n= V= VR = D= Fr = QT= dMAx = T= A= P= R= n= V= VR = D= Fr = Qd= Qallow = dallow = Q0= d= T= A= P= R= n= V= VR = D= Fr = Minor Storm Major Storm 6.00 12.00 1.00 2.00 3.00 12.00 6.32 12.65 0.47 0.95 0.430 0.052 0.19 2.49 0.09 2.36 0.50 1.00 0.05 0.44 0.57 a 29.91 Minor Storm Major Storm 1.00 2.00 6.00 12.00 3.00 12.00 6.32 12.65 0.47 0.95 0.430 0.052 0.19 2.49 0.09 2.36 0.50 1.00 0.05 0.44 0.57 29.91 Minor Storm Major Storm 0.57 29.91 1.00 2.00 0.12 5.84 0.56 1.48 3.35 8.87 0.94 6.55 3.53 9.35 0.27 0.70 0.430 0.118 0.13 0.89 0.03 0.62 0.28 0.74 0.04 0.18 ft ft sg ft ft ft fps ft^2/s ft cfs feet feet square feet feet feet fps ft"2/s feet cfs cfs ft cfs feet feet square feet feet feet fps ft^2/s feet Basin OS -1, Design Point Swale (P-3).xlsm, Area Inlet 4/3120241 5:14 PM Soils Information - 21 CivilArts, Inc. USDA United States Department of Agriculture N RCS Natural Resources Conservation Service A product of the National Cooperative Soil Survey, a joint effort of the United States Department of Agriculture and other Federal agencies, State agencies including the Agricultural Experiment Stations, and local participants Custom Soil Resource Report for Weld County, Colorado, Southern Part NGL / BIOCHAR FACILITY May 30, 2024 Preface Soil surveys contain information that affects land use planning in survey areas. They highlight soil limitations that affect various land uses and provide information about the properties of the soils in the survey areas. Soil surveys are designed for many different users, including farmers, ranchers, foresters, agronomists, urban planners, community officials, engineers, developers, builders, and home buyers. Also, conservationists, teachers, students, and specialists in recreation, waste disposal, and pollution control can use the surveys to help them understand, protect, or enhance the environment. Various land use regulations of Federal, State, and local governments may impose special restrictions on land use or land treatment. Soil surveys identify soil properties that are used in making various land use or land treatment decisions. The information is intended to help the land users identify and reduce the effects of soil limitations on various land uses. The landowner or user is responsible for identifying and complying with existing laws and regulations. Although soil survey information can be used for general farm, local, and wider area planning, onsite investigation is needed to supplement this information in some cases. Examples include soil quality assessments (http://www.nrcs.usda.gov/wps/ portal/nrcs/main/soils/health/) and certain conservation and engineering applications. For more detailed information, contact your local USDA Service Center (https://offices.sc.egov.usda.gov/locator/app?agency=nrcs) or your NRCS State Soil Scientist (http://www.nres.usda.gov/wps/portal/nres/detail/soils/contactus/? cid=nrcs142p2_053951). 142p2_053951). Great differences in soil properties can occur within short distances. Some soils are seasonally wet or subject to flooding. Some are too unstable to be used as a foundation for buildings or roads. Clayey or wet soils are poorly suited to use as septic tank absorption fields. A high water table makes a soil poorly suited to basements or underground installations. The National Cooperative Soil Survey is a joint effort of the United States Department of Agriculture and other Federal agencies, State agencies including the Agricultural Experiment Stations, and local agencies. The Natural Resources Conservation Service (NRCS) has leadership for the Federal part of the National Cooperative Soil Survey. Information about soils is updated periodically. Updated information is available through the NRCS Web Soil Survey, the site for official soil survey information. The U.S. Department of Agriculture (USDA) prohibits discrimination in all its programs and activities on the basis of race, color, national origin, age, disability, and where applicable, sex, marital status, familial status, parental status, religion, sexual orientation, genetic information, political beliefs, reprisal, or because all or a part of an individual's income is derived from any public assistance program. (Not all prohibited bases apply to all programs.) Persons with disabilities who require 2 alternative means for communication of program information (Braille, large print, audiotape, etc.) should contact USDA's TARGET Center at (202) 720-2600 (voice and TDD). To file a complaint of discrimination, write to USDA, Director, Office of Civil Rights, 1400 Independence Avenue, S.W., Washington, D.C. 20250-9410 or call (800) 795-3272 (voice) or (202) 720-6382 (TDD). USDA is an equal opportunity provider and employer. 3 Contents Preface 2 How Soil Surveys Are Made 5 Soil Map 8 Soil Map 9 Legend 10 Map Unit Legend 11 Map Unit Descriptions 11 Weld County, Colorado, Southern Part 13 46 Olney fine sandy loam, 0 to 1 percent slopes 13 47 Olney fine sandy loam, 1 to 3 percent slopes 14 56 Renohill clay loam, 0 to 3 percent slopes 15 75 Vona sandy loam, 0 to 1 percent slopes 16 References 18 4 How Soil Surveys Are Made Soil surveys are made to provide information about the soils and miscellaneous areas in a specific area. They include a description of the soils and miscellaneous areas and their location on the landscape and tables that show soil properties and limitations affecting various uses. Soil scientists observed the steepness, length, and shape of the slopes; the general pattern of drainage; the kinds of crops and native plants; and the kinds of bedrock. They observed and described many soil profiles. A soil profile is the sequence of natural layers, or horizons, in a soil. The profile extends from the surface down into the unconsolidated material in which the soil formed or from the surface down to bedrock. The unconsolidated material is devoid of roots and other living organisms and has not been changed by other biological activity. Currently, soils are mapped according to the boundaries of major land resource areas (MLRAs). MLRAs are geographically associated land resource units that share common characteristics related to physiography, geology, climate, water resources, soils, biological resources, and land uses (USDA, 2006). Soil survey areas typically consist of parts of one or more MLRA. The soils and miscellaneous areas in a survey area occur in an orderly pattern that is related to the geology, landforms, relief, climate, and natural vegetation of the area. Each kind of soil and miscellaneous area is associated with a particular kind of landform or with a segment of the landform. By observing the soils and miscellaneous areas in the survey area and relating their position to specific segments of the landform, a soil scientist develops a concept, or model, of how they were formed. Thus, during mapping, this model enables the soil scientist to predict with a considerable degree of accuracy the kind of soil or miscellaneous area at a specific location on the landscape. Commonly, individual soils on the landscape merge into one another as their characteristics gradually change. To construct an accurate soil map, however, soil scientists must determine the boundaries between the soils. They can observe only a limited number of soil profiles. Nevertheless, these observations, supplemented by an understanding of the soil -vegetation -landscape relationship, are sufficient to verify predictions of the kinds of soil in an area and to determine the boundaries. Soil scientists recorded the characteristics of the soil profiles that they studied. They noted soil color, texture, size and shape of soil aggregates, kind and amount of rock fragments, distribution of plant roots, reaction, and other features that enable them to identify soils. After describing the soils in the survey area and determining their properties, the soil scientists assigned the soils to taxonomic classes (units). Taxonomic classes are concepts. Each taxonomic class has a set of soil characteristics with precisely defined limits. The classes are used as a basis for comparison to classify soils systematically. Soil taxonomy, the system of taxonomic classification used in the United States, is based mainly on the kind and character of soil properties and the arrangement of horizons within the profile. After the soil 5 Custom Soil Resource Report scientists classified and named the soils in the survey area, they compared the individual soils with similar soils in the same taxonomic class in other areas so that they could confirm data and assemble additional data based on experience and research. The objective of soil mapping is not to delineate pure map unit components; the objective is to separate the landscape into landforms or landform segments that have similar use and management requirements. Each map unit is defined by a unique combination of soil components and/or miscellaneous areas in predictable proportions. Some components may be highly contrasting to the other components of the map unit. The presence of minor components in a map unit in no way diminishes the usefulness or accuracy of the data. The delineation of such landforms and landform segments on the map provides sufficient information for the development of resource plans. If intensive use of small areas is planned, onsite investigation is needed to define and locate the soils and miscellaneous areas. Soil scientists make many field observations in the process of producing a soil map. The frequency of observation is dependent upon several factors, including scale of mapping, intensity of mapping, design of map units, complexity of the landscape, and experience of the soil scientist. Observations are made to test and refine the soil -landscape model and predictions and to verify the classification of the soils at specific locations. Once the soil -landscape model is refined, a significantly smaller number of measurements of individual soil properties are made and recorded. These measurements may include field measurements, such as those for color, depth to bedrock, and texture, and laboratory measurements, such as those for content of sand, silt, clay, salt, and other components. Properties of each soil typically vary from one point to another across the landscape. Observations for map unit components are aggregated to develop ranges of characteristics for the components. The aggregated values are presented. Direct measurements do not exist for every property presented for every map unit component. Values for some properties are estimated from combinations of other properties. While a soil survey is in progress, samples of some of the soils in the area generally are collected for laboratory analyses and for engineering tests. Soil scientists interpret the data from these analyses and tests as well as the field -observed characteristics and the soil properties to determine the expected behavior of the soils under different uses. Interpretations for all of the soils are field tested through observation of the soils in different uses and under different levels of management. Some interpretations are modified to fit local conditions, and some new interpretations are developed to meet local needs. Data are assembled from other sources, such as research information, production records, and field experience of specialists. For example, data on crop yields under defined levels of management are assembled from farm records and from field or plot experiments on the same kinds of soil. Predictions about soil behavior are based not only on soil properties but also on such variables as climate and biological activity. Soil conditions are predictable over long periods of time, but they are not predictable from year to year. For example, soil scientists can predict with a fairly high degree of accuracy that a given soil will have a high water table within certain depths in most years, but they cannot predict that a high water table will always be at a specific level in the soil on a specific date. After soil scientists located and identified the significant natural bodies of soil in the survey area, they drew the boundaries of these bodies on aerial photographs and 6 Custom Soil Resource Report identified each as a specific map unit. Aerial photographs show trees, buildings, fields, roads, and rivers, all of which help in locating boundaries accurately. Soil Map The soil map section includes the soil map for the defined area of interest, a list of soil map units on the map and extent of each map unit, and cartographic symbols displayed on the map. 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Blowout r, O 0 v •m 4 4 Borrow Pit Clay Spot Closed Depression Gravel Pit Gravelly Spot Landfill Lava Flow Marsh or swamp Mine or Quarry Miscellaneous Water Perennial Water Rock Outcrop Saline Spot Sandy Spot Severely Eroded Spot Sinkhole Slide or Slip Sodic Spot a Spoil Area Stony Spot Very Stony Spot Wet Spot Other Special Line Features Water Features Streams and Canals Transportation Rails Interstate Highways US Routes Major Roads Local Roads Background iair°§1 Aerial Photography MAP INFORMATION The soil surveys that comprise your AOI were mapped at 1:24,000. Warning: Soil Map may not be valid at this scale. Enlargement of maps beyond the scale of mapping can cause misunderstanding of the detail of mapping and accuracy of soil line placement. The maps do not show the small areas of contrasting soils that could have been shown at a more detailed scale. Please rely on the bar scale on each map sheet for map measurements. Source of Map: Natural Resources Conservation Service Web Soil Survey URL: Coordinate System: Web Mercator (EPSG:3857) Maps from the Web Soil Survey are based on the Web Mercator projection, which preserves direction and shape but distorts distance and area. A projection that preserves area, such as the Albers equal-area conic projection, should be used if more accurate calculations of distance or area are required. This product is generated from the USDA -MRCS certified data as of the version date(s) listed below. Soil Survey Area: Weld County, Colorado, Southern Part Survey Area Data: Version 22, Aug 24, 2023 Soil map units are labeled (as space allows) for map scales 1:50,000 or larger. Date(s) aerial images were photographed: Mar 1, 2023 -Sep 1, 2023 The orthophoto or other base map on which the soil lines were compiled and digitized probably differs from the background imagery displayed on these maps. As a result, some minor shifting of map unit boundaries may be evident. 10 Custom Soil Resource Report Map Unit Legend Map Unit Symbol Map Unit Name Acres in AOI Percent of AOI 46 Olney fine sandy percent slopes loam, 0 to 1 15.1 38.2% 47 Olney fine sandy percent slopes loam, 1 to 3 5.9 14.8% 56 Renohill percent clay slopes loam, 0 to 3 10.6 26.8% 75 Vona sandy loam, percent slopes 0 to 1 8.0 20.2% Totals for Area of Interest 39.5 100.0% Map Unit Descriptions The map units delineated on the detailed soil maps in a soil survey represent the soils or miscellaneous areas in the survey area. The map unit descriptions, along with the maps, can be used to determine the composition and properties of a unit. A map unit delineation on a soil map represents an area dominated by one or more major kinds of soil or miscellaneous areas. A map unit is identified and named according to the taxonomic classification of the dominant soils. Within a taxonomic class there are precisely defined limits for the properties of the soils. On the landscape, however, the soils are natural phenomena, and they have the characteristic variability of all natural phenomena. Thus, the range of some observed properties may extend beyond the limits defined for a taxonomic class. Areas of soils of a single taxonomic class rarely, if ever, can be mapped without including areas of other taxonomic classes. Consequently, every map unit is made up of the soils or miscellaneous areas for which it is named and some minor components that belong to taxonomic classes other than those of the major soils. Most minor soils have properties similar to those of the dominant soil or soils in the map unit, and thus they do not affect use and management. These are called noncontrasting, or similar, components. They may or may not be mentioned in a particular map unit description. Other minor components, however, have properties and behavioral characteristics divergent enough to affect use or to require different management. These are called contrasting, or dissimilar, components. They generally are in small areas and could not be mapped separately because of the scale used. Some small areas of strongly contrasting soils or miscellaneous areas are identified by a special symbol on the maps. If included in the database for a given area, the contrasting minor components are identified in the map unit descriptions along with some characteristics of each. A few areas of minor components may not have been observed, and consequently they are not mentioned in the descriptions, especially where the pattern was so complex that it was impractical to make enough observations to identify all the soils and miscellaneous areas on the landscape. 11 Custom Soil Resource Report The presence of minor components in a map unit in no way diminishes the usefulness or accuracy of the data. The objective of mapping is not to delineate pure taxonomic classes but rather to separate the landscape into landforms or landform segments that have similar use and management requirements. The delineation of such segments on the map provides sufficient information for the development of resource plans. If intensive use of small areas is planned, however, onsite investigation is needed to define and locate the soils and miscellaneous areas. An identifying symbol precedes the map unit name in the map unit descriptions. Each description includes general facts about the unit and gives important soil properties and qualities. Soils that have profiles that are almost alike make up a soil series. Except for differences in texture of the surface layer, all the soils of a series have major horizons that are similar in composition, thickness, and arrangement. Soils of one series can differ in texture of the surface layer, slope, stoniness, salinity, degree of erosion, and other characteristics that affect their use. On the basis of such differences, a soil series is divided into soil phases. Most of the areas shown on the detailed soil maps are phases of soil series. The name of a soil phase commonly indicates a feature that affects use or management. For example, Alpha silt loam, 0 to 2 percent slopes, is a phase of the Alpha series. Some map units are made up of two or more major soils or miscellaneous areas. These map units are complexes, associations, or undifferentiated groups. A complex consists of two or more soils or miscellaneous areas in such an intricate pattern or in such small areas that they cannot be shown separately on the maps. The pattern and proportion of the soils or miscellaneous areas are somewhat similar in all areas. Alpha -Beta complex, 0 to 6 percent slopes, is an example. An association is made up of two or more geographically associated soils or miscellaneous areas that are shown as one unit on the maps. Because of present or anticipated uses of the map units in the survey area, it was not considered practical or necessary to map the soils or miscellaneous areas separately. The pattern and relative proportion of the soils or miscellaneous areas are somewhat similar. Alpha -Beta association, 0 to 2 percent slopes, is an example. An undifferentiated group is made up of two or more soils or miscellaneous areas that could be mapped individually but are mapped as one unit because similar interpretations can be made for use and management. The pattern and proportion of the soils or miscellaneous areas in a mapped area are not uniform. An area can be made up of only one of the major soils or miscellaneous areas, or it can be made up of all of them. Alpha and Beta soils, 0 to 2 percent slopes, is an example. Some surveys include miscellaneous areas. Such areas have little or no soil material and support little or no vegetation. Rock outcrop is an example. 12 Custom Soil Resource Report Weld County, Colorado, Southern Part 46 —Olney fine sandy loam, 0 to 1 percent slopes Map Unit Setting National map unit symbol: 362t Elevation: 4,600 to 5,200 feet Mean annual precipitation: 11 to 15 inches Mean annual air temperature: 46 to 54 degrees F Frost -free period: 125 to 175 days Farmland classification: Prime farmland if irrigated and the product of I (soil erodibility) x C (climate factor) does not exceed 60 Map Unit Composition Olney and similar soils: 85 percent Minor components: 15 percent Estimates are based on observations, descriptions, and transects of the mapunit. Description of Olney Setting Landform: Plains Down -slope shape: Linear Across -slope shape: Linear Parent material: Mixed deposit outwash Typical profile H1-0to10 inches: H2- 10 to 20 inches. H3 - 20 to 25 inches H4 - 25 to 60 inches fine sandy loam ▪ sandy clay loam : sandy clay loam : fine sandy loam Properties and qualities Slope: 0 to 1 percent Depth to restrictive feature: More than 80 inches Drainage class: Well drained Runoff class: Low Capacity of the most limiting layer to transmit water (Ksat): Moderately high to high (0.57 to 2.00 in/hr) Depth to water table: More than 80 inches Frequency of flooding: None Frequency of ponding: None Calcium carbonate, maximum content: 15 percent Maximum salinity: Nonsaline to very slightly saline (0.0 to 2.0 mmhos/cm) Available water supply, 0 to 60 inches: Moderate (about 7.0 inches) Interpretive groups Land capability classification (irrigated): 3e Land capability classification (non irrigated): 4c Hydrologic Soil Group: B Ecological site: R067BY024CO - Sandy Plains Hydric soil rating: No 13 Custom Soil Resource Report Minor Components Zigweid Percent of map unit: 8 Hydric soil rating: No Vona Percent of map unit: 7 Hydric soil rating: No percent percent 47 Olney fine sandy loam, 1 to 3 percent slopes Map Unit Setting National map unit symbol: 362v Elevation: 4,600 to 5,200 feet Mean annual precipitation: 11 to 15 inches Mean annual air temperature: 46 to 54 degrees F Frost -free period: 125 to 175 days Farmland classification: Prime farmland if irrigated and the product of I (soil erodibility) x C (climate factor) does not exceed 60 Map Unit Composition Olney and similar soils: 85 percent Minor components: 15 percent Estimates are based on observations, descriptions, and transects of the mapunit. Description of Olney Setting Landform: Plains Down -slope shape: Linear Across -slope shape: Linear Parent material: Mixed deposit outwash Typical profile H1 - 0 to 10 inches: fine sandy loam H2 - 10 to 20 inches: sandy clay loam H3 - 20 to 25 inches: sandy clay loam H4 - 25 to 60 inches: fine sandy loam Properties and qualities Slope: 1 to 3 percent Depth to restrictive feature: More than 80 inches Drainage class: Well drained Runoff class: Low Capacity of the most limiting layer to transmit water (Ksat): Moderately high to high (0.57 to 2.00 in/hr) Depth to water table: More than 80 inches Frequency of flooding: None Frequency of ponding: None Custom Soil Resource Report Calcium carbonate, maximum content: 15 percent Maximum salinity: Nonsaline to very slightly saline (0.0 to 2.0 mmhos/cm) Available water supply, 0 to 60 inches: Moderate (about 7.0 inches) Interpretive groups Land capability classification (irrigated): 3e Land capability classification (nonirrigated): 4c Hydrologic Soil Group: B Ecological site: R067BY024CO - Sandy Plains Hydric soil rating: No Minor Components Zigweid Percent of map unit: 10 percent Hydric soil rating: No Vona Percent of map unit: 5 percent Hydric soil rating: No 56 Renohill clay loam, 0 to 3 percent slopes Map Unit Setting National map unit symbol: 3635 Elevation: 4,850 to 5,200 feet Mean annual precipitation: 11 to 16 inches Mean annual air temperature: 46 to 48 degrees F Frost -free period: 100 to 160 days Farmland classification: Farmland of statewide importance Map Unit Composition Renohill and similar soils: 85 percent Minor components: 15 percent Estimates are based on observations, descriptions, and transects of the mapunit. Description of Renohill Setting Landform: Plains Down -slope shape: Linear Across -slope shape: Linear Parent material: Residuum weathered from shale Typical profile H? - 0 to 9 inches: clay loam H2 - 9 to 32 inches: clay loam H3 - 32 to 36 inches: unweathered bedrock Properties and qualities Slope: 0 to 3 percent Depth to restrictive feature: 20 to 40 inches to paralithic bedrock 15 Custom Soil Resource Report Drainage class: Well drained Runoff class: Low Capacity of the most limiting layer to transmit water (Ksat): Moderately low to moderately high (0.06 to 0.20 in/hr) Depth to water table: More than 80 inches Frequency of flooding: None Frequency of ponding: None Calcium carbonate, maximum content: 5 percent Available water supply, 0 to 60 inches: Low (about 5.6 inches) Interpretive groups Land capability classification (irrigated): 3e Land capability classification (non irrigated): 4e Hydrologic Soil Group: D Ecological site: R067BY042CO - Clayey Plains Hydric soil rating: No Minor Components Ulm Percent of map unit: 10 percent Hydric soil rating: No Shingle Percent of map unit: 5 percent Hydric soil rating: No 75 Vona sandy loam, 0 to 1 percent slopes Map Unit Setting National map unit symbol: 363v Elevation: 4,650 to 4,950 feet Mean annual precipitation: 13 to 15 inches Mean annual air temperature: 48 to 55 degrees F Frost -free period: 130 to 160 days Farmland classification: Farmland of statewide importance Map Unit Composition Vona and similar soils: 85 percent Minor components: 15 percent Estimates are based on observations, descriptions, and transects of the mapunit. Description of Vona Setting Landform: Terraces Down -slope shape: Linear Across -slope shape: Linear Parent material: Alluvium Custom Soil Resource Report Typical profile HI - 0 to 6 inches: sandy loam H2 - 6 to 28 inches: fine sandy loam H3 - 28 to 60 inches: sandy loam Properties and qualities Slope: 0 to 1 percent Depth to restrictive feature: More than 80 inches Drainage class: Well drained Runoff class: Very low Capacity of the most limiting layer to transmit water (Ksat): High (1.98 to 6.00 in/hr) Depth to water table: More than 80 inches Frequency of flooding: None Frequency of ponding: None Calcium carbonate, maximum content: 15 percent Maximum salinity: Nonsaline to slightly saline (0.0 to 4.0 mmhos/cm) Available water supply, 0 to 60 inches: Moderate (about 6.8 inches) Interpretive groups Land capability classification (irrigated): 3e Hydrologic Soil Group: A Ecological site: R067BY024CO - Sandy Plains Hydric soil rating: No Minor Components Remmit Percent of map unit: 11 percent Hydric soil rating: No Olney Percent of map unit: 4 percent Hydric soil rating: No References American Association of State Highway and Transportation Officials (AASHTO). 2004. Standard specifications for transportation materials and methods of sampling and testing. 24th edition. American Society for Testing and Materials (ASTM). 2005. Standard classification of soils for engineering purposes. ASTM Standard D2487-00. Cowardin, L.M., V. Carter, F.C. Golet, and E.T. LaRoe. 1979. Classification of wetlands and deep -water habitats of the United States. U.S. Fish and Wildlife Service FWS/OBS-79/31. Federal Register. July 13, 1994. Changes in hydric soils of the United States. Federal Register. September 18, 2002. Hydric soils of the United States. Hurt, G.W., and L.M. Vasilas, editors. Version 6.0, 2006. Field indicators of hydric soils in the United States. N ational Research Council. 1995. Wetlands: Characteristics and boundaries. Soil Survey Division Staff. 1993. Soil survey manual. Soil Conservation Service. U .S. Department of Agriculture Handbook 18. http://www.nrcs.usda.gov/wps/portal/ nres/detai I/national/soils/?cid=nres 142p2_054262 Soil Survey Staff. 1999. Soil taxonomy: A basic system of soil classification for making and interpreting soil surveys. 2nd edition. Natural Resources Conservation Service, U.S. Department of Agriculture Handbook 436. http:// www.nres. usda.gov/wps/portal/nres/detail/national/soils/?cid=n res142p2_053577 Soil Survey Staff. 2010. Keys to soil taxonomy. 11th edition. U.S. Department of Agriculture, Natural Resources Conservation Service. http:// www.nres.usda.gov/wps/portal/nres/detail/national/soils/?cid=n res142p2_053580 Tiner, R.W., Jr. 1985. Wetlands of Delaware. U.S. Fish and Wildlife Service and Delaware Department of Natural Resources and Environmental Control, Wetlands Section. U nited States Army Corps of Engineers, Environmental Laboratory. 1987. Corps of Engineers wetlands delineation manual. Waterways Experiment Station Technical Report Y-87-1. U nited States Department of Agriculture, Natural Resources Conservation Service. N ational forestry manual. http://www.nres.usda.gov/wps/portal/nres/detail/soils/ home/?cid=nrcs142p2_053374 U nited States Department of Agriculture, Natural Resources Conservation Service. N ational range and pasture handbook. http://www.nrcs.usda.gov/wps/portal/nrcs/ detail/national/landuse/rangepastu re/?cid=stel prdb 1043084 18 Custom Soil Resource Report U nited States Department of Agriculture, Natural Resources Conservation Service. N ational soil survey handbook, title 430 -VI. http://www.nrcs.usda.gov/wps/portal/ nres/detai I/soils/scientists/?cid=nres 142p2 054242 U nited States Department of Agriculture, Natural Resources Conservation Service. 2006. Land resource regions and major land resource areas of the United States, the Caribbean, and the Pacific Basin. U.S. Department of Agriculture Handbook 296. http://www.nres.usda.gov/wps/portal/nres/detail/national/soils/? cid=nrcs142p2_053624 U nited States Department of Agriculture, Soil Conservation Service. 1961. Land capability classification. U.S. Department of Agriculture Handbook 210. http:// www.nres.usda.gov/Internet/FSE_DOCUMENTS/nres142p2_052290.pdf 19 NGL / BIOCHAR FACILITY LOTS A & B OF RECORDED EXEMPTION 1471-28-01 RECX17-0182 IN THE NORTHEAST 1/4 OF SECTION 28, TOWNSHIP 1 NORTH, RANGE 66 WEST OF THE 6TH P.M. COUNTY OF WELD, STATE OF COLORADO. Preliminary Drainage Report Prepared for: Mr. Bob Demaree Biochar Processing CR 6 LLC 1142 Judson Street Longmont CO 80501 Email: bob.demaree c,kw.com Prepared by: C IVILARTS Daniel Alonzo, PE Ph: 303.682.1131 1500 Kansas Ave., Suite 2-E Longmont, Colorado 80501 CivilArts Project No. E437 Original Submittal: 05/30/2024 Revision #1 Submittal Date: 07/09/2024 Professional Engineers Certification County of Weld, Colorado Compliance Statement I Daniel Alonzo, Consultant Engineer for NGL/Biochar (Applicant), understand and acknowledge that the applicant is seeking land use approval of the case and parcel in the description above. I have designed or reviewed the design for the proposed land use set for in the application. I hereby certify, on behalf of the applicant, that the design will meet all applicable drainage requirements of the Weld County Code with the exception of the variance(s) described on the attached exhibits. This certification is not a guarantee or warranty either expressed or implied. Engineer's Stamp: Daniel Alonzo, Registered Professional Engineer State of Colorado No. 37550 (Affix Seal) - 2 - CivilArts, Inc. Table of Contents 1 . Site Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 A. Site Location Description B . Property Description C . Drainage description 2. Drainage Basin Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 A. Major Drainage Basin B . Site Drainage Basins 3. Drainage Design Criteria . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 A. Regulation Applicability B . Site Planning and Constraints C. Hydrologic and Hydraulic Criteria D . Post Construction Stormwater Quality Criteria 4. Drainage P1an . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 A. General Concept B . Specific Details 5. Stream , Wetland , and Waterbody Impacts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. .. . 12 A. Description of Floodplain Impacts B . Required modification studies . C . Applicable permits obtained. 6. Stormwater Conveyance Design . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 A. Description of proposed conveyance system B . Conveyance path to major drainageway and capacity evaluation C . Storm sewer, culvert, and inlet design D . Open channel design E . Outfall design F . Street drainage G. Easement requirements H. Maintenance requirements 7. Detention and Post- Construction Stormwater Quality Design . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 A. Description of each proposed facility B . Description of design compliance with detention and water quality requirements C. Inlet design D . Basin and outlet design - 3 - CivilArts, Inc. E . Description of vegetation coverage and planting plan F . Description of filter media selection and underdrain configuration G. Easement requirements H. Description of maintenance requirements 8. Conclusions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 A. Drainage plan effectiveness B . Compliance with requirements C . Exclusions and variances 9. References . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. .. . 13 A. Standards, criteria, guidance documents, master plans, and technical reports used. 10 . Appendices . .. .. .. .. .. . . .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. . 14 Appendix A - Soils Survey Appendix B - Fema Firmette Appendix C - NOAA Rainfall Tables Appendix D - Hydrological Calcs Appendix E - Hydraulic Calcs Appendix F - Drainage Maps Appendix G - Copies of Graphs , Tables, and Nomographs Used - 4 - CivilArts, Inc. 1 . Site Description A. Site Location Description I. City, county, section, township, range, and quarter section NGL Biochar is located within the Southwest corner of Narthwest of Weld County Road 6 . This property lies within a parcel of land in Section 28 , Township 1N, Range 66 West of the 6th principal meridian, County of Weld, State of Colorado. II. Site vicinity and legal boundaries map � , �� y� , � � ��/�� ; � ,kF— � �:� � + - �' " — , • / � v. a , . /,/� , � . , �/ � � .` � /� ; i �. � . ' •' . ; / - li / � ✓� iii . � • / /` . ' „ � �� I :' * �A ,1 7 ! ' ' // 7 � � • � � �` } . • r. � I �/�% , • %%� � � . � " '1' � � � //%/ �f . . . � ` - = � i - r. . , . �-�� , • , — ; ' Y;� _, ` zi. � ^ c , t . � x * cr — :� . .. , ; , � _ ' / ' . � I � , ,� � � �- • — � � _ — r ' — , � a�,�y1F a"�-��. - � - �+�-. - - � � �' � � 1 � - � � , ' �� I Locatin Map IIZ Adjacent developments and associccted land use NGL Biochar is located at 14508 Weld County Road 6, Fort Lupton, 80621 . The Surrounding developments are : At the North; Weld County RD 6 . At the South, Private Propriety called Yarborough. At the East; Existing Private Property. At the West, Field used as agricultural. IV. Roadways located within or ac�jacent to the site. No roadways exist within the site . To the north is a public street, Weld County Road 6 . B. Property Description I. Site area and proposed a�ea of disturbance in acres The site area is 143 , 312 square feet or 32 . 9acres . The total disturbed area is 143 , 312 square feet or 32 . 9 acres . See drainage maps in the appendix. - 5 - CivilArts , Inc. IL Existing ancl proposed site uses. The existing site use is commercial, and the proposed site use is commercial . IIZ Lancl surface. IV. The existing land surface is field grass area and 3 buildings . V. Easements within or adjacent to the site Several public easements exist within the site for public utilities . C. Drainage Description I. Major and minor drainageways There are no major or minor drainageways adjacent to the site , but the water eventually drains to the Kalloga Lake at the corner of the NW of the Site . IZ Natural drainage features The existing natural drainage features of the site are from the corner of the southeast to the northwest corner. The Pre-Development basin "EX- 1 " contains 14 . 77 acres , basin "EX-2" contains 17 . 34 acres and basin "OS - 1 " contains 16 acres . The site is covered with grass and wet areas at slope ranging from 0 to 2°/a . This can be seen from a review of the Pre-Development Drainage Map prepared by CivilArts and located in the appendices . IIL Irrigation ditches No irrigation ditches are within or adjacent to the site . IV. Regulatory floodplain extents No regulatory flood plains exist within the site or adjacent to the site . The site is in FEMA flood zone X and outside the 100-year flood. The FEMA Map is . identified as FIRM Pane108123C2120E ; Effective date 01 /20/2016 . V. Knoivn drainage issues. During our research, we did not find any adverse drainage issues associated with the site . VL Hydrologic soil group mup and clescription The Custom Soil Resource Report far the site shows the existing soils are classified as (46) , 23 . 2% Olney fine sandy loam, 0 to 1 percent slopes, (47), 12 . 6% Olney fine sandy loam, 1 to 3 percent slopes, (56), 223% Renohill clay loam, 0 to 3 percent slopes, (75 ) 35 . 0% Vona sandy loam, 0 to 1 percent slopes, (76) 1 . 8% Vona sandy loam, 1 to 3 percent slopes, and (85 ) 5 .2% Water. These soils are classified respectively as hydrologic soil group "B , D & A" and are described as Olney fine sandy loam, Olney fine sandy loam, Renohill clay loam, and Vona sandy loam. The current development is taking place on the well-drained Vona sandy loam Soil Group "A" . The soils report is attached in the appendix and the on-site Pre- Development Drainage Map report is also attached. - 6 - CivilArts, Inc. VIZ Geotechnical and groundwater site investigation results N/A. VIIL Preliminary infiltration Feasibility Screening results and map N/A 2 . Drainage Basin Description A. Major Drainage Basin I. General clescription of major drainage basin characteristics and flow pattern The major drainage basin for the site will mimic the existing flow patterns of the historic drainage for the site . The site will continue to drain southwest to northeast towards . The existing site will continue to serve as a detention area. IL Flow convey«nce from site to receiving major dr«inageivay. N/A. IIL Reference and description of applicable plc�nning studies for the major drninageway This proposed drainage system conforms with the goals, policies , and standards . outlined in Weld County Code, Chapter " 8" Public Works, Article XI " Storm Drainage . " It also provides the required treatment and post development analysis . IV. Impact of site clevelopment on upstreum ancl downstream properties We can certify that the impact of the site development on upstream and downstream. properties are negligible because we are limiting the post-development discharge and volume to be equal to or less than the pre -development discharge rate and volume . The pre & post development discharge, (CFS) far the 5 - , 10-, and 100-Year events are outlined in the appendices . B. Site Drainage Basins L Existing and proposed basin nncl sub-basin chc�rncteristics for the site The existing and proposed basin and sub-basin characteristics for the site are shown on the drainage maps within this report. The weighted "C" values are listed in the appendix. IL Acceptance and conveyance of off-site stormwater The existing property has passed through drainage from the south identified in this . report as OS - 1 . The city drainage records indicated 16 acres un-detained. pass -through drainage, with a 100-year rate of approximately 5 . 84 CFS . Research of the site revealed an actual 16acre un-detained direct discharge . through the site . We have modeled the offsite discharge at 2% impervious . with the C factors outlined in the Counties Drainage Manual . - 7 - CivilArts, Inc. IIL Overview of all existing and proposed stormwater facilities and rationale The overview of all existing and proposed stormwater facilities for the site and adjacent properties is overland flow which eventually transitions to shallow concentrated flow and is retained on-site . We plan to generally continue to maintain and improve in some cases the existing flow paths . 3. Drainage Design Criteria A. Regulation Applicability L Detention requirements This project will meet the Stormwater Quality Design Standard and performance metric from the Weld County Code, Chapter " 8" Public Works, Article XI " Storm Drainage" . IL Construction stormivater m«nagement rerjuirements We will provide a construction and drainage plan that provides control measures . during construction that prevents or reduces the discharge of pollutants to downstream receiving waters of the State as described in Weld County Code , Chapter " 8" Public Works, Article XI " Storm Drainage" . IIL Post — construction stormwater manugement re�uirements. The post — construction stormwater management requirements are to keep the pavement and swales free of debris and garbage/refuse/trash and to maintain the proposed underdrain free of obstructions so it may function as intended. This will enable the system to function as intended and comply with regulations currently adopted by the County of Weld and State of Colorado . IV. Stream, Weticrncl, ancl Waterbody Protection Requirements This project complies with Weld County Code, Chapter " 8" Public Works , Article XI " Storm Drainage" . V. Other applicable criteriu ancl permits. This project complies with Weld County Code, Chapter " 8" Public Works , Article XI " Storm Drainage" . B. Site Planning and Constraints Z Description of previous drainage studies or master plans This proposed drainage system conforms with the goals, policies , and standards . outlined in Weld County Code, Chapter " 8" Public Works, Article XI " Storm Drainage. " IZ Description of site constraints caused by structures, utilities, etc. No site constraints are caused by structures, utilities, etc . IIZ Description of LID techniques utilized for stormwater management. N/A - 8 - CivilArts, Inc. C. Hydrologic and Hydraulic Criteria L Design stornzs. The design storms that apply to this project are in accordance with Weld County Code , Chapter " 8" Public Works, Article XI " Storm Drainage" . The design storms analyzed in this report were the 2 -year minor storm and the 100-year major storm. Also included is the 5 , & 10-year storm for reference. II. Runoff calculntion metho�ls The runoff calculation methods used were the rational formula. IIZ Detention storage and discharge calculation method The Rational Formula-Based Moddified FAA M obtained from the Mile High Drainage District and current software used in the local industry. IV. Velocity and capacity calculation methods for inlets and conveyances The velocity and capacity calculations were obtained utilizing current accepted software utilized by the Mile High Drainage District and local governments . V. Wnter surf�zce profile and hydraulic grade line (HGL) calculation methods The water surface profile and hydraulic grade line calculation methods were obtained utilizing current accepted software utilized by the Mile High Drainage District and local governments . VI. Calculation method Rainfall data from the Mile High Flood District (MHFD) may be used as an alternative and are as follows : Point Precipitation Frequency Estimates (NOAA Atlas 14) 2 -Year 5 -Year 10-Year 25 -Year 50-Year 100- Year P1 0 . 83 1 . 11 1 . 38 1 . 81 2 . 19 2 . 61 Per the Weld County Drainage Criteria, the rainfall intensities were calculated. using the following equation: A — the area of the catchment tributary to the storage facility (acres) C = the runoff coefficient QPO — the calculated 5 -year or 10-year historic runoff release rate from pond (CFS) Tc — the time of concentration for the tributary catchment (see the RUNOFF chapter) (minutes) P1 — the 1 -hour design rainfall depth (inches) at the site taken from the NOAA At1as website using a site-specific gage, for the relevant return frequency storms. The calculations are best set up in a tabular (spreadsheet) form with each 5-minute increment in duration being entered in rows and the following variables being entered, or calculated, in each column: - 9 - CivilArts, Inc. 1 . Storm Duration Time , T (minutes), up to 180 minutes . 2 . Rainfall Intensity, I (inches per hour), calculated using Equation RA-3 from the RAINFALL chapter. 3 . Inflow volume, Vi (cubic feet), calculated as the cumulative volume at the given storm duration using the equation: Vs = CIA (60T) 4 . Outflow adjustment factor m (Guo 1999a) : Mz( 1 +�) 0 . 5 ≤ m ≤ 1andT ≥ Tc 5 . The calculated average outflow rate, Qav (CFS) , over the duration T : Qav — mQpo 6 . The calculated outflow volume , Vo, (cubic feet) , during the given duration and the adjustment factor at that duration calculated using the equation : VS = V1 — Vo The value of Vs increases with time , reaches a maximum value, and then starts to decrease . The maximum value of Vs is the required storage volume for the detention facility. D. Post Construction Stormwater Quality Criteria I. Selected treatment approach and design standards The selected treatment approach conforms with Weld County Code, Chapter " 8" Public Works , Article XI "Storm Drainage" . 4. Drainage Plan . A. General Concept I. Conveyance offsite drainage and downstrecrm outfalls The "Grading" Overall Utility and Drainage Plan for the building, there are 2 basins : DA- 1 and DA-2 . Runoff from drive immediately from those basins are conveyed to the proposed outfall inlet by proposed swale on our north property line . Our drainage plan is proposing to collect the stormwater runoff and attenuate the storm events while maintaining the existing outfall to the existing structure in the NW Corner of the Site. IL Coordinatzon with surrounding developments We anticipate the only coordination with the surrounding developments will be as required by the Site Plan Approval process the County has in place . IIL Detention pondingiN�ater qi�ality BMP plan, zdentify o�vnership and - 10 CivilArts, Inc. maintenance responsibilzties. Water quality will be achieved by multiple avenues. There are swales on the north, west property boundaries of the site which will contribute to water quality treatment. Additionally, all on- site basins runoff will be treated in the CDS pollution control devices in the west and west swales before being routed into the underground detention system which is also manufactured by Contech. Detention will be achieved with the proposed 6-barrel (48" diameter) Contech underground detention system. Runoff will be first treated in the north and west swales then collected and treated again by the CDS structure before being diverted to the underground system. Within the underground system, the 5 -year and 100-year events will be detained and released at or below the allowable release rates for detention ponds established by the Weld County. Per Criteria manual, the 5 -year release rate IS 0 .63 CFS/AC , and the 100-year release rate is 0 .72 CFS/AC both for Vona Hydrologic soil group "A" soils . Therefore, the allowable discharge rate for the combined site (including offsite OS 1 to the south) from the pond is : Storm Event = Allowable 5 Year = (32 . 90+4. 90) x 0. 63 - = 23 . 80 CFS 100 Year — (32 . 90+4. 90) x 0 . 72 = = 23 . 70 CFS B. Specific Details L Existing and PNoposed sz� bbaszrz descrzptions The Existing Drainage Map shows the following drainage areas : The first existing drainage area is EX- 1 is a 14 .77 AC area (impervious area-20%, Q100yr— 14 .95 CFS) consisting of a vacant lot which generally flows from southeast to northwest and also has a tributary offsite flow from the west which is designated EX- 1 on the Existing Drainage Map . The next drainage area is EX-2 — 1734 AC (impervious area-2%, Q 100= 10 . 10 CFS ) which is located in the north ROW of the property . portion of the vacant lot where stormwater generally flows from east to northwest into the ROW of Weld County Road 19 . In total, the total onsite area = 32 . 90 acres . The Existing Drainage Map shows the design point discharge P 1 located at the point of discharge near the existing outfall structure located in the NW of the site. The Proposed Drainage Map shows the following drainage areas : The first post drainage area is DA- 1 is a 1430 AC area (impervious rea-20. 0%, Q100yr— 14 . 72cfs) consisting of a vacant lot which generally flows from southeast to northwest and also has a tributary offsite flow from the west which is designated DA- 1 on the post Drainage Map . The next drainage area is DA-2 — 17 . 90 AC (impervious area=41 .0%, Q 100= 22 . 16 CFS) whic h is in the north ROW of the property. partion of the vacant lot where stormwater generally flows from east to northwest into the ROW of Weld County Road 19 . In total, the total onsite area = 33 .20 acres . The Existing Drainage Map shows the design point discharge P1 and P2 all located at the point of discharge near the existing outfall structure located in the NW of the site . 5. Stream , Wetland , and Waterbody Impacts A. Description of floodplain impacts N/A - 11 CivilArts, Inc. B. Required modifica�ion studies . N/A C. Applicable permits obtained . N/A 6 . Stormwater Conveyance Design A. Description of proposed conveyance system Proposed grass buffer and on- site swale including underdrain for the treatment of stormwater runoff. See calculations and drainage plan in appendix. B. Conveyance path to major drainageway and capacity evaluation . Proposed on-site swale including to the depression area and conveyance . See calculations and drainage plan in appendix. C. Storm sewer, culvert, and inlet design N/A D. Open channel design See grass swale design in appendix. E. Outfall design N/A F. Street design N/A G. Easement requirements Easements will be provided if required. H. Maintenance requirements Easements will be provided if required. 7 . Detention and Post Construction Stormwater Quality Design A. Description of each proposed facility Grass swale and underdrain as described in the drainage calculations and drainage plan found in the appendix. B. Description of design compliance with detention and water quality requirements The design meets the water quality standards set forth in Chapter 7 (CBDCS) and sound engineering principals . C. Inlet design N/A D. Basin and outlet design N/A E. Description of vegetation coverage and plan�ing plan All disturbed areas shall be sodded and/or planted as shown on the plans and specifications found in the appendix. F. Description of filter media selection and underdrain configuration N/A G. Easement requirements Easements will be provided if required. 8 . Conclusions - 12 CivilArts, Inc. A. Drainage plan effectiveness The proposed drainage plan meets the standards set forth in the Weld County Code, Chapter " 8" Public Works , Article XI " Storm Drainage" . The pre-development discharge rate and volume is approximately equivalent to the post-development rate and volume and therefore treatment is the only requirement. B. Compliance with requirements The proposed drainage plan and calculations comply with the standards set forth in Weld County Code, Chapter " 8" Public Works, Article XI " Storm Drainage" . C. Exclusions and variances N/A 9. References "Weld County Engineering and Construction Criteria", Weld County Planning Department, January 2021 United States Department of Agriculture, Natural Resources and Conservation Service (NRCS) , May 2022 , Web Soil Survey Urban Storm Drainage Criteria Manual, Volumes 1 ,2 , and 3 , Urban Drainage and Flood Control District, and http : //www .udfcd. or�/ Colorado Discharge Permit System (CDPS) General Permit — Stormwater discharges associated with construction activities , https : //cdphe . colorado . gov/ 10. Appendices A. Soils Report B. Fema — Firmette C. Hydrologic calculations and tables D. Hydraulic calculations E. Drainage Maps F. Critical references information copied to create standalone document. - 13 CivilArts, Inc. Soils Survey - 14 CivilArts, Inc. �J� [�,,"� UnitedStates AproductoftheNational Custom Soil Resource `� Department of Cooperative Soil Survey, � Agriculture a joint effort of the United Report for � �� States Department of Agriculture and other We I d C o u n ty Federal agencies, State � Natural agencies including the C o I o ra d o � Resources Agricultural Experiment Conservation Stations, and local Service participants S o u t h e rn P a rt NGL / BIOCHAR FACILITY .- _ _ _ - , - i � S, � - � �d� —_ _ — - ' — ' _ _ � � � _ _ _ � , T � �.�e > . � J � -Y� � ' �L � ' � �, � I 1' . �M r'fsif�w�Yl � • _ �_. -� � � T _ ' � y �� e" � L. J� • � � . . mY . ..'I � � -. � • yn . . ) -..� � � � � q �� . � � u � L - I� � I. �� . � � ;t � . . \ r f r� ti � ..r�. . , . i. . , ,,. � - � : � � ' ` � . ��N �� " . . . ` ^•I � _ _ - a" , . . I� ', �.r - � i . - � � r ' . . . ' - ' - ' u' ' � 7 � ��!i .. ' �-. � �• Y - �v� �=i * � �� - ' " � ' � « � :' . �. . � z � � . L . l, - _ ' . — ,� . , • � ,�r ��'y ` ' �. . � , ' . . � . > - � � �4 . _, , . `��`. � � . � : '��! r -<- �—S�?.� � — - = ' .. - d " " v S i � i �� ryt , � II � � � T}�� :y � . . •� �,� . . • � � � • � y � ' - ' � �� ' l ♦ � , �� a� � I _ � I� ��i _ _ ` 1 � • � 1 � 1�- , " � � ,1 , � . � r, ' � � G \'. � � , , . � I . - � . �� `i 1 �. - RF � -. y' . -- �, . ;�- . s1 �1 _� ' ti - � � �S ' �~j" `.i ''� .—i�"'� ;i ' I �1 — ^ � ` � . ., r � e ^ � t:. _ . . — A .t --�_tt.._ � �� , — . . s. 4 . .- _ ' "_ � . ._ . 1 � , � r� . . i�� y . '� � Ti � i . . . ! . � . s i. . . . . . � i � � � . I.�l S_5 ._' . Y � � q yl • i '•1 r . _ ' .i. Y _ r . - - May 30 , 2024 Preface Soil surveys contain information that affects land use planning in survey areas . They highlight soil limitations that affect various land uses and provide information about the properties of the soils in the survey areas . Soil surveys are designed for many different users , including farmers , ranchers , foresters, agronomists , urban planners , community officials , engineers , developers , builders , and home buyers . Also , conservationists , teachers , students, and specialists in recreation , waste disposal , and pollution control can use the surveys to help them understand , protect, or enhance the environment. Various land use regulations of Federal , State , and local governments may impose special restrictions on land use or land treatment. Soil surveys identify soil properties that are used in making various land use or land treatment decisions . The information is intended to help the land users identify and reduce the effects of soil limitations on various land uses . The landowner or user is responsible for identifying and complying with existing laws and regulations . Although soil survey information can be used for general farm , local , and wider area planning , onsite investigation is needed to supplement this information in some cases . Examples include soil quality assessments (http : //www. nres . usda . gov/wps/ portal/nres/main/soils/health/) and certain conservation and engineering applications . For more detailed information , contact your local USDA Service Center (https : //offices . sc. egov. usda . gov/locator/app?agency= nres) or your NRCS State Soil Scientist (http : //www. nres . usda . gov/wps/portal/nres/detail/soils/contactus/? cid =nres142p2_053951 ) . Great differences in soil properties can occur within short distances . Some soils are seasonally wet or subject to flooding . Some are too unstable to be used as a foundation for buildings or roads . Clayey or wet soils are poorly suited to use as septic tank absorption fields . A high water table makes a soil poorly suited to basements or underground installations. The National Cooperative Soil Survey is a joint effort of the United States Department of Agriculture and other Federal agencies, State agencies including the Agricultural Experiment Stations , and local agencies . The Natural Resources Conservation Service ( NRCS) has leadership for the Federal part of the National Cooperative Soil Survey. Information about soils is updated periodically. Updated information is available through the NRCS Web Soil Survey, the site for official soil survey information . The U . S . Department of Agriculture ( USDA) prohibits discrimination in all its programs and activities on the basis of race , color, national origin , age , disability, and where applicable , sex, marital status , familial status , parental status , religion , sexual orientation , genetic information , political beliefs , reprisal , or because all or a part of an individual's income is derived from any public assistance program . ( Not all prohibited bases apply to all programs . ) Persons with disabilities who require 2 alternative means for communication of program information ( Braille , large print, audiotape , etc. ) should contact USDA's TARGET Center at (202 ) 720-2600 (voice and TDD ). To file a complaint of discrimination , write to USDA, Director, Office of Civil Rights , 1400 Independence Avenue , S .W. , Washington , D . C . 20250-9410 or call (800) 795-3272 (voice ) or (202 ) 720-6382 (TDD ). USDA is an equal opportunity provider and employer. 3 Contents Preface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 How Soil Surveys Are Made . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 SoilMap . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 SoilMap . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 Legend . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 MapUnit Legend . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 MapUnit Descriptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 Weld County, Colorado , Southern Part. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 46—Olney fine sandy loam , 0 to 1 percent slopes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 47—Olney fine sandy loam , 1 to 3 percent slopes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 56—Renohill clay loam , 0 to 3 percent slopes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 75—Vona sandy loam , 0 to 1 percent slopes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 References . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 4 How Soil Surveys Are Made Soil surveys are made to provide information about the soils and miscellaneous areas in a specific area . They include a description of the soils and miscellaneous areas and their location on the landscape and tables that show soil properties and limitations affecting various uses . Soil scientists observed the steepness, length , and shape of the slopes ; the general pattern of drainage ; the kinds of crops and native plants ; and the kinds of bedrock. They observed and described many soil profiles . A soil profile is the sequence of natural layers , or horizons , in a soil . The profile extends from the surface down into the unconsolidated material in which the soil formed or from the surface down to bedrock. The unconsolidated material is devoid of roots and other living organisms and has not been changed by other biological activity. Currently, soils are mapped according to the boundaries of major land resource areas ( MLRAs) . MLRAs are geographically associated land resource units that share common characteristics related to physiography, geology, climate , water resources , soils, biological resources , and land uses ( USDA, 2006) . Soil survey areas typically consist of parts of one or more MLRA. The soils and miscellaneous areas in a survey area occur in an orderly pattern that is related to the geology, landforms , relief, climate , and natural vegetation of the area . Each kind of soil and miscellaneous area is associated with a particular kind of landform or with a segment of the landform . By observing the soils and miscellaneous areas in the survey area and relating their position to specific segments of the landform , a soil scientist develops a concept, or model , of how they were formed . Thus , during mapping , this model enables the soil scientist to predict with a considerable degree of accuracy the kind of soil or miscellaneous area at a specific location on the landscape . Commonly, individual soils on the landscape merge into one another as their characteristics gradually change . To construct an accurate soil map , however, soil scientists must determine the boundaries between the soils . They can observe only a limited number of soil profiles . Nevertheless, these observations, supplemented by an understanding of the soil-vegetation -landscape relationship , are sufficient to verify predictions of the kinds of soil in an area and to determine the boundaries . Soil scientists recorded the characteristics of the soil profiles that they studied . They noted soil color, texture , size and shape of soil aggregates , kind and amount of rock fragments , distribution of plant roots , reaction , and other features that enable them to identify soils . After describing the soils in the survey area and determining their properties , the soil scientists assigned the soils to taxonomic classes (units) . Taxonomic classes are concepts . Each taxonomic class has a set of soil characteristics with precisely defined limits . The classes are used as a basis for comparison to classify soils systematically. Soil taxonomy, the system of taxonomic classification used in the United States , is based mainly on the kind and character of soil properties and the arrangement of horizons within the profile . After the soil 5 Custom Soil Resource Report scientists classified and named the soils in the survey area , they compared the individual soils with similar soils in the same taxonomic class in other areas so that they could confirm data and assemble additional data based on experience and research . The objective of soil mapping is not to delineate pure map unit components ; the objective is to separate the landscape into landforms or landform segments that have similar use and management requirements. Each map unit is defined by a unique combination of soil components and/or miscellaneous areas in predictable proportions . Some components may be highly contrasting to the other components of the map unit. The presence of minor components in a map unit in no way diminishes the usefulness or accuracy of the data . The delineation of such landforms and landform segments on the map provides sufficient information for the development of resource plans . If intensive use of small areas is planned , onsite investigation is needed to define and locate the soils and miscellaneous areas . Soil scientists make many field observations in the process of producing a soil map . The frequency of observation is dependent upon several factors, including scale of mapping , intensity of mapping , design of map units , complexity of the landscape , and experience of the soil scientist. Observations are made to test and refine the soil-landscape model and predictions and to verify the classification of the soils at specific locations . Once the soil-landscape model is refined , a significantly smaller number of ineasurements of individual soil properties are made and recorded . These measurements may include field measurements , such as those for color, depth to bedrock, and texture , and laboratory measurements , such as those for content of sand , silt, clay, salt, and other components . Properties of each soil typically vary from one point to another across the landscape . Observations for map unit components are aggregated to develop ranges of characteristics for the components. The aggregated values are presented . Direct measurements do not exist for every property presented for every map unit component. Values for some properties are estimated from combinations of other properties . While a soil survey is in progress , samples of some of the soils in the area generally are collected for laboratory analyses and for engineering tests . Soil scientists interpret the data from these analyses and tests as well as the field-observed characteristics and the soil properties to determine the expected behavior of the soils under different uses . Interpretations for all of the soils are field tested through observation of the soils in different uses and under different levels of management. Some interpretations are modified to fit local conditions , and some new interpretations are developed to meet local needs. Data are assembled from other sources , such as research information , production records , and field experience of specialists . For example , data on crop yields under defined levels of management are assembled from farm records and from field or plot experiments on the same kinds of soil . Predictions about soil behavior are based not only on soil properties but also on such variables as climate and biological activity. Soil conditions are predictable over long periods of time , but they are not predictable from year to year. For example , soil scientists can predict with a fairly high degree of accuracy that a given soil will have a high water table within certain depths in most years, but they cannot predict that a high water table will always be at a specific level in the soil on a specific date . After soil scientists located and identified the significant natural bodies of soil in the survey area , they drew the boundaries of these bodies on aerial photographs and 6 Custom Soil Resource Report identified each as a specific map unit. Aerial photographs show trees , buildings , fields , roads , and rivers , all of which help in locating boundaries accurately. 7 Soi I Map The soil map section includes the soil map for the defined area of interest, a list of soil map units on the map and extent of each map unit, and cartographic symbols displayed on the map . Also presented are various metadata about data used to produce the map , and a description of each soil map unit. 8 Custom Soil Resource Report � � Soil Map M M � � o a g � .. .. 51E420 518500 518580 518E60 518740 518820 518900 518�0 519060 519140 40° 1' 4T� N $i � . .� _ � _ � _ _ .�. �.. - -_ _ C _ I � � c � 40° 1' 47" N � � �: ' - - — � { - -. - =_ . - - - - �- �' � ,r� � a - -�� - -» z-. _ T `� �� -- � . _ - � - � T� � � — JS� ".Fn. �:J �17 � ��i� ` .et .w.,"�`i� _f .. ��y��II yiij�Y� � � w i � � ��-L-�"<"` � � ww,. . __ ��+ � � �. P�,.,�y�,, �. �� lei�l� � ��'� � s . � �� I -.; �- _ , y � ,� ' p .+ . : , . � '.r� 1. _ �� 7 . � a r�. _ _ -� � �� c�i _ i •- . � , I I f , , ' . . I . f. � � 6 •�� i .� : �. .a�f�' I i ,1�' �_'�T - t i - .�+.�� -'� - � i _ � �:• yY .' + :�l'r� ` . r .. i�� , n � y. � . �' -� - -� e �( L� .1'I �F Q � � ��F�T � � �/��. � �. . . . � 1 � . � 4' , t._ . , •._ - - _ r, �- ��y; , p - � � _ � t:.. ��. . ry � , ..�' . � ra.. � �'Y' i' 'I�' F.. ' ` O � p :n � v� �Y � � � .. : . ' �� ' r . y :�� . . _ .- _ � � ��'G � ��' � J. ' - ' �r�.��: , { `, , � � . . .' o . - � � . � � .�.� , � � � � � v �,, � � �. . r f � { � ��, �, N� , � L _ . �. . : � .e t .. S. ' . . . � 'y ' : , � i �y� . . '• - y� � .f'.`� . _ . . l . � � 90 . �; _ \ i n � — ) � i i � � . e,+ ` /��• V � �� •, �� — _ '� � � ' t ' ♦ , 'I�� ''' � � � � � ~ � � � �,�'1tr �� \ � ' ' . - _ �:�� e �.f . . 1. _ �� i � I� r�� F..�:- �� :. ��"r' �� , � _ a_ � , � � _- _ _. - ,.. _ ; � . � i _ . y:, '�' � '� " i . '� �/ �(,r .. ��}�_ �- 1 �� .� � � G. . ' ' „ , � ' t . . .• �+ � � �' ��'' y _ . _..- �wf� �4 rf . _ - .. . . . .. q � ` , . � .� � . . . . � � �.� _ _ :. . � ' . _ _ — . '/ . i {� . .' ' b I'. h � � i' cc . = � - �i _ i , � f p _ :� � . . \ _ . . ,. �c�. t' �` :_�. 1' � � �{ Il�:r'n � { �� . _ '� , � � . - , .. +i � 1 ^ �� . i . . _ . . �� r ' $;''. ' -�' - . . ; . � . . . -- � - i , �,. . P � y i � , � . tT ..�t . c. � . —. . ,. - •: ;i' s �u � . �.., � . . '_ • .�� 4 � � S�lli � � . � � ' � ��v �� .� � �`�' �- � ��. �� jhl: �. . ' - _ _ � . �S� �� v, -� . x � - . 1'" .�� .. 7 _ _ _ _ .� . . . "v '� ! . ..`� — . �` v � i _ . - J " - , . . :� .� , : � {tii - ' �,ir i. � • '- .'. .C .. � �� , � , ' , � - ,� '� ��-m. � i ,� � � rT r .. - " . . _ !m a .- � ' .. ._ �3�-- 1� ' � • � .� � . i 4 . - ' a 11 -� _ . � T� � .� L i �l' T •.� . 1' . ; ; � � � 3 �_.. � � '�', . _ �__ ._ .c s • � • Y,� � ' . - .� y i - k . _y�"je,f � : ' i ' �� . � .. - _ . � .- . I ' _ w , . . `.:�.... _ iyS,,� � � a ��`T�.,. _ p _ � y i � _ � � . . . � � r� � � i - � . � 1 I '°'� 1 , yZ _ '� � ��' . � � ;�' , �� '�� • - °' -- :, � , a S , _ � 'a � � ` K ,; � , .-, " � � ^-�, , . . Il ..(� :`��,� .. r � . � � i �.... . . _ c -. . . . . " -. . ., -. - � 1.� .. . . � u . r , � t . �Ii �� .� . t II T ! L. _14 - .. _ ��. � � � � — � I` �� -r� ;� -� i _-�. � :� �1 � � . r . .V . • i '9�� . � � � Y � '^ ' I t ' ! � ' . . . � y . ,T^I . _ �1. � . 4 __ _ , I_t - - . � i . . .Q .. . .. - . �IJp -.r� i - - . . . . _ . - ' " . . _ . � � . � ' _ _� !IP ' . - � . 'uC . �..iova ir < � 9 �� i � . w .� , . . ' � t . . -w. rr. :- . •'�'. . . . � . . . � �� i.�Fti - ' . � � . ' �' . i . . i - --1� � t - � . 1 4 , ' .! � � . ., I� . ` c o , `r Soil Map may not be v b� th'i� ��al�. , ' . ` y- , �� ,� y>� ' - ,� . � ' �. ��p . _ .. _ . . _ _ _ . � , -. � - + r . -:. . . � �f-� o � .: . . � . ,- � � . . , . -_ - _ . . . _. . . . •. .. � r - . , ._ `8 � J�� . . � . -�:.s . . � � ]1[� _ � . _ . _ " . : . � , .. _ _ . . . - - 1 ' i n � ..` `_ 1 .. .� '� _°- 1 �JTJ � 4�..� _'_ _ �� . 1Y1(L— � T"'� . . • � ( -_ — � . _ :Fr . � �} �' T� � O � M i � _ � 40° 1 31 N V I I 7 I I � �� I- � ao i 3i N 518420 518�0 518580 5186� 518740 518�0 518900 518�0 519060 519140 3 3 M ;. a Map Scale: 1 : 3,480 if printed on A landsca� (11" x 8.5") sheet � g N Meters a � 0 50 100 200 300 � � � 0 150 300 600 900 Map projedion: Web Mercator Corner mordinates: WG584 Edge tics: UTM Zone 13N WGS84 9 Custom Soil Resource Report MAP LEGEND MAP INFORMATION Area of Interest (AOq � Spoil Area The soil surveys that comprise your AOI were mapped at Area of Interest (AOI) 1 : 24 ,000 . � Stony Spot Soils Very Stony Spot Soil Map Unit Polygons Warning : Soil Map may not be valid at this scale. `• Wet Spot � : � Soil Map Unit Lines Enlargement of maps beyond the scale of mapping can cause other misunderstandin of the detail of ma in and accurac of soil O Soil Map Unit Points g pp g y Special Line Features line placement. The maps do not show the small areas of Special Point Features � contrasting soils that could have been shown at a more detailed cz Blowout Water Features 5Cale . Streams and Canals � , Borrow Pit Transportation Please rely on the bar scale on each map sheet for map � Clay Spot Rails measurements. i-hF „, ; Closed Depression � Interstate Highways , , Source of Map: Natural Resources Conservation Service - Gravel Pit US Routes Web Soil Survey URL: ; ;: Gravelly Spot Major Roads Coordinate System : Web Mercator (EPSG :3857) '-' Landfill �•=�` Local Roads Maps from the Web Soil Survey are based on the Web Mercator � Lava Flow gackground projection, which preserves direction and shape but distorts distance and area . A projection that preserves area , such as the � Marsh or swamp �� Aerial Photography Albers equal-area conic projection , should be used if more /��M1 - Mine or cluarry accurate calculations of distance or area are required . ,;; . �,_, Miscellaneous Water This product is generated from the USDA-NRCS certified data as � - Perennial Water of the version date(s) listed below. Rock outcrop Soil Survey Area: Weld County, Colorado, Southern Part �_ Saline Spot Survey Area Data : Version 22 , Aug 24, 2023 Sandy Spot Soil map units are labeled (as space allows) for map scales ^, Severely Eroded Spot 1 : 50 ,000 or larger. Sinkhole Date(s) aerial images were photographed : Mar 1 , 2023-Sep 1 , �• Slide or Slip 2023 ��,,? Sodic Spot The orthophoto or other base map on which the soil lines were compiled and digitized probably differs from the background imagery displayed on these maps. As a result, some minor shifting of map unit boundaries may be evident. 10 Custom Soil Resource Report Map Unit Legend Map Unit Symbol Map Unit Name Acres in AOI Percent of AOI 46 Olney fine sandy loam , 0 to 1 15 . 1 38 .2% percent slopes (Prime Farmla d) 47 Olney fine sandy loam , 1 to 3 5 .9 14 .8% percent slopes (Prime Farmla d) 56 Renohill clay loam , 0 to 3 10 .6 26 .8% percent slopes (Farmland of tatewide Importance) 75 Vona sandy loam , 0 to 1 8 .0 20 .2% percent slopes (Farmland of tatewide Importance) Totals for Area of Interest 39.5 100.0% Map Unit Descriptions The map units delineated on the detailed soil maps in a soil survey represent the soils or miscellaneous areas in the survey area . The map unit descriptions , along with the maps , can be used to determine the composition and properties of a unit. A map unit delineation on a soil map represents an area dominated by one or more major kinds of soil or miscellaneous areas . A map unit is identified and named according to the taxonomic classification of the dominant soils . Within a taxonomic class there are precisely defined limits for the properties of the soils . On the landscape , however, the soils are natural phenomena , and they have the characteristic variability of all natural phenomena . Thus, the range of some observed properties may extend beyond the limits defined for a taxonomic class. Areas of soils of a single taxonomic class rarely, if ever, can be mapped without including areas of other taxonomic classes . Consequently, every map unit is made up of the soils or miscellaneous areas for which it is named and some minor components that belong to taxonomic classes other than those of the major soils . Most minor soils have properties similar to those of the dominant soil or soils in the map unit, and thus they do not affect use and management. These are called noncontrasting , or similar, components . They may or may not be mentioned in a particular map unit description . Other minor components , however, have properties and behavioral characteristics divergent enough to affect use or to require different management. These are called contrasting , or dissimilar, components . They generally are in small areas and could not be mapped separately because of the scale used . Some small areas of strongly contrasting soils or miscellaneous areas are identified by a special symbol on the maps. If included in the database for a given area , the contrasting minor components are identified in the map unit descriptions along with some characteristics of each . A few areas of minor components may not have been observed , and consequently they are not mentioned in the descriptions , especially where the pattern was so complex that it was impractical to make enough observations to identify all the soils and miscellaneous areas on the landscape . 11 Custom Soil Resource Report The presence of minor components in a map unit in no way diminishes the usefulness or accuracy of the data . The objective of mapping is not to delineate pure taxonomic classes but rather to separate the landscape into landforms or landform segments that have similar use and management requirements. The delineation of such segments on the map provides sufficient information for the development of resource plans . If intensive use of small areas is planned , however, onsite investigation is needed to define and locate the soils and miscellaneous areas . An identifying symbol precedes the map unit name in the map unit descriptions . Each description includes general facts about the unit and gives important soil properties and qualities . Soils that have profiles that are almost alike make up a soil series. Except for differences in texture of the surface layer, all the soils of a series have major horizons that are similar in composition , thickness , and arrangement. Soils of one series can differ in texture of the surface layer, slope , stoniness , salinity, degree of erosion , and other characteristics that affect their use . On the basis of such differences , a soil series is divided into soil phases. Most of the areas shown on the detailed soil maps are phases of soil series . The name of a soil phase commonly indicates a feature that affects use or management. For example , Alpha silt loam , 0 to 2 percent slopes , is a phase of the Alpha series. Some map units are made up of two or more major soils or miscellaneous areas . These map units are complexes, associations , or undifferentiated groups . A complex consists of two or more soils or miscellaneous areas in such an intricate pattern or in such small areas that they cannot be shown separately on the maps . The pattern and proportion of the soils or miscellaneous areas are somewhat similar in all areas. Alpha- Beta complex, 0 to 6 percent slopes , is an example . An association is made up of two or more geographically associated soils or miscellaneous areas that are shown as one unit on the maps . Because of present or anticipated uses of the map units in the survey area , it was not considered practical or necessary to map the soils or miscellaneous areas separately. The pattern and relative proportion of the soils or miscellaneous areas are somewhat similar. Alpha- Beta association , 0 to 2 percent slopes , is an example . An undifferentiated group is made up of two or more soils or miscellaneous areas that could be mapped individually but are mapped as one unit because similar interpretations can be made for use and management. The pattern and proportion of the soils or miscellaneous areas in a mapped area are not uniform . An area can be made up of only one of the major soils or miscellaneous areas , or it can be made up of all of them . Alpha and Beta soils, 0 to 2 percent slopes , is an example . Some surveys include miscellaneous areas. Such areas have little or no soil material and support little or no vegetation . Rock outcrop is an example . 12 Custom Soil Resource Report Weld County, Colorado , Southern Part 46-Olney fine sandy loam , 0 to 1 percent slopes Map Unit Setting National map unit symbol: 362t Elevation: 4 , 600 to 5 , 200 feet Mean annual precipitation: 11 to 15 inches Mean annual air temperature: 46 to 54 degrees F Frost-free period: 125 to 175 days Farmland classification: Prime farmland if irrigated and the product of I (soil erodibility) x C (climate factor) does not exceed 60 Map Unit Composition Olney and similar soils: 85 percent Minor components: 15 percent Estimates are based on observations, descriptions, and transects of the mapunit. Description of Olney Setting Landform: Plains Down-slope shape: Linear Across-slope shape: Linear Parent material: Mixed deposit outwash Typical profile H1 - 0 to 10 inches: fine sandy loam H2 - 10 to 20 inches: sandy clay loam H3 - 20 to 25 inches: sandy clay loam H4 - 25 to 60 inches: fine sandy loam Properties and qualities Slope: 0 to 1 percent Depth to restrictive feature: More than 80 inches Drainage class: Well drained Runoff class: Low Capacity of the most limiting layer to transmit water (Ksat) : Moderately high to high (0 . 57 to 2 . 00 in/hr) Depth to water table: More than 80 inches Frequency of flooding: None Frequency of ponding: None Calcium carbonate, maximum content: 15 percent Maximum salinity.• Nonsaline to very slightly saline (0 . 0 to 2 . 0 mmhos/cm ) Available water supply, 0 to 60 inches: Moderate (about 7 . 0 inches) Interpretive groups Land capability classification (irrigated): 3e Land capability classification (nonirrigated) : 4c Hydrologic Soil Group: B Ecological site: R067BY024CO - Sandy Plains Hydric soil rating: No 13 Custom Soil Resource Report Minor Components Zigweid Percent of map unit: 8 percent Hydric soil rating: No Vona Percent of map unit: 7 percent Hydric soil rating: No 47—Olney fine sandy loam , 1 to 3 percent slopes Map Unit Setting National map unit symbol: 362v Elevation: 4 , 600 to 5 , 200 feet Mean annual precipitation: 11 to 15 inches Mean annual air femperature: 46 to 54 degrees F Frost-free period: 125 to 175 days Farmland classification: Prime farmland if irrigated and the product of I (soil erodibility) x C (climate factor) does not exceed 60 Map Unit Composition Olney and similar soils: 85 percent Minor components: 15 percent Estimates are based on observations, descriptions, and transects of fhe mapunit. Description of Olney Setting Landform: Plains Down-slope shape: Linear Across-slope shape: Linear Parent material: Mixed deposit outwash Typical profile H1 - 0 to 1 D inches: fine sandy loam H2 - 10 to 20 inches: sandy clay loam H3 - 20 fo 25 inches: sandy clay loam H4 - 25 to 60 inches: fine sandy loam Properties and qualities Slope: 1 to 3 percent Depth to restrictive feature: More than 80 inches Drainage class: Well drained Runoff class: Low Capacity of the most limiting layer to transmit water (Ksat) : Moderately high to high (0 . 57 to 2 . 00 in/hr) Depth to water table: More than 80 inches Frequency of flooding: None Frequency of ponding: None 14 Custom Soil Resource Report Calcium carbonate, maximum content: 15 percent Maximum salinity.• Nonsaline to very slightly saline (0 . 0 to 2 . 0 mmhos/cm ) Available water supply, 0 fo 60 inches: Moderate (about 7 . 0 inches) Interpretive groups Land capability classification (irrigated): 3e Land capability classification (nonirrigated) : 4c Hydrologic Soil Group: B Ecological site: R067BY024CO - Sandy Plains Hydric soil rating: No Minor Components Zigweid Percent of map unit: 10 percent Hydric soil rating: No Vona Percent of map unit: 5 percent Hydric soil rating: No 56—Renohill clay loam , 0 to 3 percent slopes Map Unit Setting National map unit symbol: 3635 Elevation: 4 , 850 to 5 , 200 feet Mean annual precipitation: 11 to 16 inches Mean annual air temperature: 46 to 48 degrees F Frost-free period: 100 to 160 days Farmland classification: Farmland of statewide importance Map Unit Composition Renohill and similar soils: 85 percent Minor components: 15 percent Estimates are based on observations, descriptions, and transects of the mapunit. Description of Renohill Setting Landform: Plains Down-slope shape: Linear Across-slope shape: Linear Parent material: Residuum weathered from shale Typical profile H1 - 0 to 9 inches: clay loam H2 - 9 to 32 inches: clay loam H3 - 32 to 36 inches: unweathered bedrock Properties and qualities Slope: 0 to 3 percent Depth to restrictive feature: 20 to 40 inches to paralithic bedrock 15 Custom Soil Resource Report Drainage class: Well drained Runoff class: Low Capacity of the most limiting layer to transmit water (Ksat) : Moderately low to moderately high (0 . 06 to 0 . 20 in/hr) Depth to water table: More than 80 inches Frequency of flooding: None Frequency of ponding: None Calcium carbonate, maximum content: 5 percent Available water supply, 0 to 60 inches: Low (about 5 . 6 inches) Interpretive groups Land capability classification (irrigated): 3e Land capability classification (nonirrigated) : 4e Hydrologic Soil Group: D Ecological site: R067BY042CO - Clayey Plains Hydric soil rating: No Minor Components Ulm Percent of map unit: 10 percent Hydric soil rating: No Shingle Percent of map unit: 5 percent Hydric soil rating: No 75—Vona sandy loam , 0 to 1 percent slopes Map Unit Setting National map unit symbol: 363v Elevation: 4 , 650 to 4 , 950 feet Mean annual precipitation: 13 to 15 inches Mean annual air temperature: 48 to 55 degrees F Frost-free period: 130 to 160 days Farmland classification: Farmland of statewide importance Map Unit Composition 1/ona and similar soils: 85 percent Minor components: 15 percent Estimates are based on observations, descriptions, and transects of the mapunit. Description of Vona Setting Landform: Terraces Down-slope shape: Linear Across-slope shape: Linear Parent material: Alluvium 16 Custom Soil Resource Report Typical profile H1 - 0 to 6 inches: sandy loam H2 - 6 to 28 inches: fine sandy loam H3 - 28 to 60 inches: sandy loam Properties and qualities Slope: 0 to 1 percent Depth to restrictive feature: More than 80 inches Drainage class: Well drained Runoff class: Very low Capacity of the most limiting layer to transmit water (Ksat) : High ( 1 . 98 to 6 . 00 in/hr) Depth to water table: More than 80 inches Frequency of flooding: None Frequency of ponding: None Calcium carbonate, maximum content: 15 percent Maximum salinity.• Nonsaline to slightly saline (0 . 0 to 4 . 0 mmhos/cm ) Available water supply, 0 to 60 inches: Moderate (about 6 . 8 inches) Interpretive groups Land capability classification (irrigated): 3e Hydrologic Soil Group: A Ecological site: R067BY024CO - Sandy Plains Hydric soil rating: No Minor Components Remmit Percent of map unit: 11 percent Hydric soil rating: No OI ney Percent of map unit: 4 percent Hydric soil rating: No 17 Refe re n ces American Association of State Highway and Transportation Officials (AASHTO) . 2004 . Standard specifications for transportation materials and methods of sampling and testing . 24th edition . American Society for Testing and Materials (ASTM ) . 2005 . Standard classification of soils for engineering purposes . ASTM Standard D2487-00 . Cowardin , L . M . , V. Carter, F. C . Golet, and E . T. LaRoe . 1979 . Classification of wetlands and deep-water habitats of the United States. U . S . Fish and Wildlife Service FWS/OBS-79/31 . Federal Register. July 13 , 1994 . Changes in hydric soils of the United States . Federal Register. September 18 , 2002 . Hydric soils of the United States . Hurt, G . W. , and L . M . Vasilas, editors . Version 6 . 0 , 2006 . Field indicators of hydric soils in the United States. National Research Council . 1995 . Wetlands : Characteristics and boundaries . Soil Survey Division Staff. 1993 . Soil survey manual . Soil Conservation Service . U . S . Department of Agriculture Handbook 18 . http : !/www. nres. usda . gov/wps/portal/ nres/detail/national/soils/?cid= nres142p2_054262 Soil Survey Staff. 1999 . Soil taxonomy: A basic system of soil classification for making and interpreting soil surveys . 2nd edition . Natural Resources Conservation Service , U . S . Department of Agriculture Handbook 436 . http :// www. nres . usda . gov/wps/portal/nres/detail/national/soils/?cid =nres142p2_053577 Soil Survey Staff. 2010 . Keys to soil taxonomy. 11th edition . U . S . Department of Agriculture , Natural Resources Conservation Service . http :// www. nres . usda . gov/wps/portal/nres/detail/national/soils/?cid =nres142p2_053580 Tiner, R. W. , Jr. 1985 . Wetlands of Delaware . U . S . Fish and Wildlife Service and Delaware Department of Natural Resources and Environmental Control , Wetlands Section . United States Army Corps of Engineers , Environmental Laboratory. 1987 . Corps of Engineers wetlands delineation manual . Waterways Experiment Station Technical Report Y-87- 1 . United States Department of Agriculture , Natural Resources Conservation Service . National forestry manual . http : //www. nres . usda . gov/wps/portal/nres/detail/soils/ home/?cid =n res 142p2_053374 United States Department of Agriculture , Natural Resources Conservation Service . National range and pasture handbook. http ://www. nres . usda . gov/wps/portal/nres/ detail/national/landuse/rangepasture/?cid =stelprdb1043084 18 Custom Soil Resource Report United States Department of Agriculture , Natural Resources Conservation Service . National soil survey handbook, title 430-VI . http ://www. nres . usda . gov/wps/portal/ nres/detai I/soi Is/scientists/?cid =nres 142p2_054242 United States Department of Agriculture , Natural Resources Conservation Service . 2006 . Land resource regions and major land resource areas of the United States, the Caribbean , and the Pacific Basin . U . S . Department of Agriculture Handbook 296 . http : //www. nres . usda . gov/wps/portal/nres/detail/national/soils/? cid =nres142p2_053624 United States Department of Agriculture , Soil Conservation Service . 1961 . Land capability classification . U . S . Department of Agriculture Handbook 210 . http : // www. n res . usda . gov/I nternet/FS E_D OC U M E NTS/n res 142 p2_052290 . pdf 19 Fema Firmette PER THE FEMA FLOOD INSURANCE RATE MAPS ( FIRM ), MAP NO . 08005C0186K, HAVING A MAP REVISED DATE OF DEC. 17, 2010, INDICATES THE SUBJECT PROPERTY TO BE DESIGNATED AS ZONE X (OUTSIDE 0 . 2% CHANCE OF FLOOD ) - 15 CivilArts, Inc. 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'� . � PIt�Lf�.4ECi WBi �STMEFi ARE,� � €x,as�� rn.�r �u�ce �r;ti�rn A�su� NOAA Rainfall Tables - 16 CivilArts, Inc. 3/4/24 , 12: 19 PM Precipitation Frequency Data Server NOAAAtIas 14, Volume 8, Version 2 JM]5.�� `� Location name: Fort Lupton, Colorado, USA* � ' � ° Latitude : 40.0295°, Longitude: -104.7797° � ?`"' ; ' � � � e Elevation : 5047 ft** � " ' � °� � ; ` " source: ESRI Maps `'a ` . � �� "" source: USGS "`" " POINT PRECIPITATION FREQUENCY ESTIMATES Sanja Perica , Deborah Martin, Sandra Pavlovic, Ishani Roy, Michael St. Laurent, Carl Trypaluk, Dale Unruh, Michael Yekta, Geoffery Bonnin NOAA, National Weather Service, Silver Spring, Maryland PF tabular � PF graphical � Maps & aerials PF tabular PDS -based point precipitation frequency estimates with 90% confidence intervals ( in inches) � Average recurrence interval (years) Duration � �, �I 10 25 50 100 200 500 1000 � z � � 5 �5-min 0.230 0.281 0. 377 0.470 0.615 0.743 0. 883 1 .04 1 .26 1 .45 (0. 177-0.299)� (0.216-0.366)� (0.289-0.492)� (0.358-0. 615) (0.463 0.856) (0. 543- 1 .04)I (0.624- 1 .26)I (0705-1 .52); (0.826- 1 . 89)'; (0.918-2. 17) �10-min 0.337 0.411 0 .552 0.688 0.901 1 .09 1 .29 1 .52 1 .85 2. 12 �0.259-0.438) (0.316-0.535) (0.423-0.720) (0.524-0.901 ) (0.678- 1 .25) (0. 795- 1 .52) (0.913- 1 .85) ( 1 .03-2.22) ( 1 .21 -2.77) (1 . 34-3. 18) �15-min 0.411 0.502 0 .674 0.839 1 .10 1 .33 1 .58 1 .85 2.26 2.59 (0.316-0. 535) (0.386-0.653) (0. 516-0.878) (0.639- 1 . 10) (0.827-1 . 53) (0. 969- 1 .85) ( 1 . 11 -225) ( 1 .26-2 .71 ) ( 1 .48-3.38) ( 1 .64-3.88) �30-min � 0.562 I 0.681 J 0. 909 1 . 13 1 .48 1 .79 2 . 13 2.50 � 3.06 3.51 (0.433 0. 731 ) (0.524-0.886)? (0.697 1 . 19) , (0.861 - 1 .48) ( 1 . 12-2 .06) ( 1 .31 -2. 50) ( 1 .50-3.04) (170-3.66) (2. 00-4.57) � (2.22-5.26) �60-min 0.687 0.831 1 . 11 1 .38 1 .81 2. 19 I 2.61 3.08 3.77 4.33 (0.528-0. 893) (0.638- 1 . 08) (0.849 1 .44) ( 1 A5- 1 . 80) ( 1 . 36 2.52) ( 1 .60-3.07) ( 1 .85-373) (2.09-4.51 ) , (2.46-5.64) I (2. 74-6.49) i �2-hr 0.811 0.980 131 1 .63 2. 14 2.59 3 . 10 3.66 4.48 5. 16 l (0. 631 - 1 .04) (0761 - 1 .26) (1 .01 - 1 .69)_ _( 1 .25-2. 11 )� _( 1 .63 2.95) I ( 1 .92-3. 59) (2 .21 -4.37) I (2.51 -5.28) I (2.96-6.61 ) (3. 30-7.62)1 �3-hr D.878 1 .06 1 .40 1 .75 2.30 2.78 3 .32 I 3.92 4.80 5.53 (0. 687- 1 . 12) (0.825- 1 . 35) (1 .09- 1 .80) ( 1 .35-2.25) ( 1 76-3. 14) (2.07-3.82) I (2 .39-4.65) (2.71 -5.62) (3. 19-7.04) (3.56-8. 11 ) 6-hr 1 .04 1 .23 1 .61 1 .98 2.58 3. 10 3 .68 4.34 5.29 6.08 (0. 822- 1 .31 ) (0.973- 1 . 56) (1 .27 2 .04) ( 1 .55-2. 52) ( 1 . 99-3.48) (2 .33-4.21 ) (2 .68-5. 10) (3.03-6. 14) (3. 56-7.65) (3. 96-8.80) 12-hr � .28 1 .49 I 1 .90 2.29 I 2.92 3.47 4.08 4.75 5.73 6.55 I ( 1 .02- 1 . 60) ( 1 . 19- 1 .86) (1 .51 -2 .38) ( 1 .81 -2.89) (2.28-3.88) (2 .63-4.64) (2 .99-5.56) (3.35-6.62) (3. 90-8. 17) (4. 31 -9.34) �24-hr � •52 1 .80 2 .29 2.73 3.41 3.98 4.60 5.26 6.20 6.97 ( 1 .23- 1 .88) i ( 1 .45-2.22) (1 .84-2.83) (2. 18-3.40) (2. 67-4.44) (3.04-5.22) i (3.40-6. 14) (374-7. 19) (4.25-8.68) , (4. 64-9.80) �2-day 1 .73 2. 10 2 .72 3.24 3.99 4.59 5.20 5.84 6.71 7.38 ( 1 .41 2. 12) I ( 1 71 -2 .57)_ (2 .20 3.33) (2_62-3.99) (3. 13-5.07) I (3.52-5. 89) (3.87-6.81) (4. 18-7.82) (4. 63-9.20) (4. 97 10.2) �3-day � '89 Z•26 2 .89 3.43 4. 19 4.80 5.42 6.06 6.94 7.62 ( 1 .55-2.29) ( 1 . 86-275) (2 .36 3.52) (279-4. 19) (3. 31 5.28) I (370-6. 10) (4.05-7.03) (4.37-8.05) (4. 82-9.43) I (5. 16- 10.5) 4-day � Z•02 2.39 3 .01 J 3.55 4.31 4.92 5.55 I 6.20 7. 10 7.79 ) 1 66-2.44) ( 1 . 97-2.88) (2 .47-3.65) i (2.90-4. 31 ) (3.42-5.40) � (3.82-6.23) (4. 17-7. 17) (4.49-8. 19) (4. 96-9.59) (5. 31 - 10.6 �7-day z.31 2.69 3 .34 3.89 4.67 5.29 5.93 6.60 7.51 8.21 ( 1 .92-2.76) (2.243.22) (2 .76-4.00) (3.20-4. 68) (3.74-5.79) I (4. 15-6.63) (4.50-7.58) (4.82-8.62) (5.29-10.0) (5.65- 11 . 1 ) �10-day Z•56 � 2.96 3 .64 ' 4.21 5.01 5.65 i 6.30 6.97 7.88 � 8.58 (2 . 14-3.04) (2.473.52) (3.03-4.33) (3.48-5.03) (4. 03-6. 16) (4.45-7. 02) (4.81 -7.98) , (5. 12-9.03) , (5. 59-10.4) (5.94- 11 .5) �20-day 3.27 3.74 4.50 5. 13 6.01 6.69 7.38 8.08 9.02 9.73 (2.77-3.84)e� (3. 15-4.39)=� (378-5.30) V (4.30-6. 06)� (4.88-7.27)� (5.32-8. 19) � (5.69-9.21 ) � (6.00- 10. 3) � (6.46- 11 . 7)� (6. 81 - 12.81 �30-day 3.84 4.37 5.23 5.94 6.90 7.65 8 .39 9. 13 10. 1 10.8 �3.27-4.48) (3. 71 -5. 10) (4.43-6. 11 ) .: . �5.00-6. 97) (5_64-8.28) . . �6. 12-9.27) .. �6.51 - 10.4) : �6.82- 11 .5) , �7.29-13. 0) (7. 64- 14.2) 45-day � 4.52 5. 15 6. 17 7.00 8. 12 8.96 9 .78 10.6 11 .6 12.4 3 87-5.23) (4.41 -5.97) (5.26-7. 17) (5.94-8. 16) (6. 66-9.64) (7.21 - 10.8) (7.63- 12.0) (7.96- 13.2) (8.45-14. 9) (8. 82- 16. 1 ) 60-day � 5.07 5.81 6.99 ) ( 7.94 9.20 I 10 . 1 ) 11 . 1 ) 11 .9 13. 1 13.9 ) 4 36-5.84) (4. 99-6.70) (5.99-8.08 6 77-9.20) (7. 58-10.9) (8. 19- 12 . 1 (8.66-13.4 (9.01 -14. 8) (9. 53-16.6) (9. 92- 17.9 � Precipitation frequency (PF) estimates in this table are based on frequency analysis of partial duration series (PDS). Numbers in parenthesis are PF estimates at lower and upper bounds of the 90% confidence interval. The probability that precipitation frequency estimates (for a given duration and average recurrence interval) will be greater than the upper bound (or less than the lower bound) is 5%. Estimates at upper bounds are not checked against probable maximum precipitation (PMP) estimates and may be higher than currently valid PMP values. Please refer to NOAAAtIas 14 document for more information. Back to Top PF graphical https://hdsc. nws . noaa . gov/pfds/pfds_printpage. html? 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Area -Weighting for Runoff Coefficient Calculation Project Title : NGL BIOCHAR ( PRE -DEVELOPMENT) 5YR Catchment ID : Illustration � �� i..Ec;�vn : Pxo.v nire�a� � �e� �` � Subanea 3 Ca�c�me� �aniaAau�y Instructions: For each catchment subarea, enter values for A and C. Subarea Area Runoff Product ID acres Coeff. A C* CA input input input output EX- 1 14 . 77 0 . 13 1 . 92 EX-2 17 . 34 0 . 01 0 . 17 OS- 1 16 . 00 0 . 01 0 . 16 Sum : 48 . 11 Sum : 2 .25 Area-Weighted Runoff Coefficient (sum CA/sum A) = 0 .05 * See sheet " Design Info" for inperviousness -based runoff coefficient values . (updated )Biochar. peak-runoff-prediction-workbook, Weighted C (5YR) 7/8/2024 , 10 : 12 AM Area -Weighting for Runoff Coefficient Calculation Project Title : NGL BIOCHAR ( PRE -DEVELOPMENT) 100YR Catchment ID : Illustration � �� i..Ec;�vn : Pxo.v nire�a� � �e� �` � Subanea 3 Ca�c�me� �aniaAau�y Instructions: For each catchment subarea, enter values for A and C. Subarea Area Runoff Product ID acres Coeff. A C* CA input input input output EX- 1 14 . 77 0 . 33 4 . 87 EX-2 17 . 34 0 . 22 3 . 81 OS- 1 16 . 00 0 . 22 3 . 52 Sum : 48 . 11 Sum : 12 .21 Area-Weighted Runoff Coefficient (sum CA/sum A) = 0 .25 * See sheet " Design Info" for inperviousness -based runoff coefficient values . (updated )Biochar. peak-runoff-prediction-workbook, Weighted C ( 100YR) 7/8/2024 , 10 : 13 AM Area -Weighting for Runoff Coefficient Calculation Project Title : NGL BIOCHAR ( POST-DEVELOPMENT) 5YR Catchment ID : Illustration � �� i..Ec;�vn : Pxo.v nire�a� � �e� �` � Subanea 3 Ca�c�me� �aniaAau�y Instructions: For each catchment subarea, enter values for A and C. Subarea Area Runoff Product ID acres Coeff. A C* CA input input input output DA- 1 14 . 30 0 . 13 1 . 86 DA-2 17 . 90 0 . 25 4 .48 OS- 1 16 . 00 0 . 01 0 . 16 Sum : 48 .20 Sum : 6 .49 Area-Weighted Runoff Coefficient (sum CA/sum A) = 0 . 13 * See sheet " Design Info" for inperviousness -based runoff coefficient values . (updated )Biochar. peak-runoff-prediction-workbook, Weighted C (5YR) ( POST) 7/8/2024 , 10 : 13 AM Area -Weighting for Runoff Coefficient Calculation Project Title : NGL BIOCHAR ( POST-DEVELOPMENT) 100YR Catchment ID : Illustration � �� i..Ec;�vn : Pxo.v nire�a� � �e� �` � Subanea 3 Ca�c�me� �aniaAau�y Instructions: For each catchment subarea, enter values for A and C. Subarea Area Runoff Product ID acres Coeff. A C* CA input input input output DA- 1 14 . 30 0 . 33 4 . 72 DA-2 17 . 90 0 .41 7 . 34 OS- 1 16 . 00 0 . 13 2 . 08 Sum : 48 .20 Sum : 14. 14 Area-Weighted Runoff Coefficient (sum CA/sum A) = 0 .29 * See sheet " Design Info" for inperviousness -based runoff coefficient values . (updated )Biochar. peak-runoff-prediction-workbook, Weighted C ( 100YR) ( POST) 7/8/2024 , 10 : 14 AM STAGE-STORAGE SIZING FOR DETENTION BASINS Project: Post-Development Basin DA-1 1 BIORCHAR Basin ID: DA-1 o� saes� z su� s� z p� Side Slepe z A �, F7ow �� Flmv A W� � Wy W� � V Side Slope Z � < > SideSlopeZ E � � Slopev <_ _ _ _ _ _ _> L L Desiqn Information (Input): Check Basin Sha e W idth of Basin Bottom , W = 134.32 ft Right Triangle OR. . . Length of Basin Bottom , L = 229.00 ft Isosceles Triangle OR. . . Dam Side-slope (H:V), Zd = 0.02 ft/ft Rectangle OR. . . Circle / Ellipse OR. . . Irregular (Use Overide values in cells G32:G52) MINOR MAJOR Storage Requirementfrom Sheet 'Modified FAA': � 0.12 D.67 acre-ft. Stage-Storage Relationship: Storage Requirement from Sheet 'Hydrograph': � acre-ft. Storage Requirement from Sheet 'Full-Spectrum': � ' acre-ft. Labels Water Side Basin Basin Surface Surface Volume Surface Volume Target Volumes for WQCV, Minor, Surface Slope Width at Length at Area at Area at Below Area at Below for WQCV, Minor, & Major Storage Elevation (H:V) Stage Stage Stage Stage Stage Stage Stage 8 Major Storage Stages ft ft/ft ft ft ftz ft2 User ft acres acre-ft Volumes (in ut in ut Below EL (out ut (out ut) out ut Overide (out ut out ut lout ut for oal seek 5042.00 (input) 134.32 229.00 30,351 0.697 0.000 5043.00 0. 17 0.00 0.00 � 32,500 31 ,426 � 0.746 �� 0.721 5044.00 0. 17 0.00 0.00 � 34,719 65,035 0.797 1 .493 _ 5045.00 0. 17 0.00 0.00 � 37,011 100,900 � 0.850 2.316 5046.00 0. 17 0.00 � 0.00 39,500 139, 156 � D.907 I 3. 195 � #N/A I I.. #N/A � #N/A - � #N/A #N/A � #N!A #N/A I #N/A #N/A I #N/A #N/A � #N/A #N/A � � #N/A #N/A I #N/A #N/A I #N/A #N/A � #N/A #N/A I � #N/A #N/A I #N/A #N/A I #N/A #N/A � #N/A #N/A I � #N!A #N/A I #N/A #N/A � #N/A #N/A � � #N/A #N/A I I #N/A #N/A I � #N/A #N/A � I_ #N/A #N/A I I #N/A #N/A � � #N/A #N/A I � #N/A #N/A I I_ #N/A #N/A � � #N/A #N/A � � #N/A #N/A I � � #N/A #N/A I I.. #N/A #N/A � � #N/A #N/A � � #N/A #N/A I � #N/A #N/A I I.. #N/A #N/A � � #N/A #N/A I � #N/A #N/A I � � #N/A #N/A � I_. #N/A � #N/A - #N/A I #N/A #N!A DA-1 Detention-basin-volume-estimating-workbook, Basin 7/3/2024, 11 :20 AM STAGE-STORAGE SIZING FOR DETENTION BASINS Project: Basin ID: STAGE-STORAGE CURVE FOR THE POND 5046.50 - 5046.00 5045.50 5045.00 .-. � 5044.50 — d . � � �. d � 5044.00 � � 5043.50 5043.00 5042.50 5042.00 0.00 0.50 1 .00 1 .50 2.00 2.50 3.00 3.50 Storage (acre -feet) DA-1 Detention-basin-volume-estimating-workbook, Basin 7/3/2024, 11 :20 AM DETENTION VOLUME BY THE MODIFIED FAA METHOD Project: Post-Development Basin DA-1 , NGL I BIOCHAR Basin ID: DA-1 (For catchments less than 160 acres only. For larger catchments, use hydrograph routing method) (NOTE: for catchments larger than 90 acres, CUHP hydrograph and routing are recoinmended) Determination of MINOR Detention Volume Using Modified FAA Method Determination of MAJOR Detention Volume Using ModiTied FAA Method Desiqn Information (Inputl: Design Intormation (Inputl: Ca[chmentDrainagelmperviousness la = 20.00 percent CatchmentDreinagelmperviousness la = Z0.00 percen[ CatchmentDrainageArea A = 14.300 acres Catchment �rainageArea A = 14.300 acres Predevelopment NRCS Soil Group Type = A A, 6, C, or D Predevelopment NRCS Soil Group Type = A A, B, C, or D ReNrn Period for Detention Control T = 5 years (2, 5, 10, 25, 50, or 100) Relurn Period for �e[en[ion Control T = 100 years (2, 5, 10, 25, 50, or 100) Tme of Concentration of Wa[ershed Tc = 10 minutes Time of Concentration of Watershed Tc = 10 minutes Allowable Unit Release Rate q = 0.07 cfslacre Allowable Unit Release Rate q = 0.50 cfs/acre One-hour Precipifa[ion P� = 1 .11 inches One-hour Precipifation P� = 2.61 inches Design Rainfall IDF Formula i = C�* P�/�Ci+T�)^C3 Design Rainfall IDF Formula i = C�* P�/�Ci+T�)^C3 Coefficient One C� = 28.50 Coefficien[ One C� = 28.50 Ccefficient Two C� = 10 Coefficient Two Cz = 10 Coefficient Three C3 = 0789 Coefficien[ Three C3 = 0789 Determination of Averaqe Outilow from the Basin (Calculatedl: Determination of Averaae Outflow from the Basin (Calculatedl: RunoffCoefficient C = 0.13 RunofFCoeffcient C = 0.33 Inflow Peak Runoff Qp-in = 5.53 cfs InFlow Peak Runoff Qp-in = 33.02 cfs Allowable Peak Oulflow Rate Qp-out = 1.00 cfs Allowable Peak Oulflow Rate Qp-out = 7.15 cfs Mod. FAA Minor Storege Volume = 5,403 cu6ic feet Mod. FAA Major Storage Volume = � 29,304 cu6ic feet Mod. FAA Minor S[orage Volume = 0.124 acre-ft Mod. FAA Major S[orage Volume = 0.673 acre-ft 5 <- Enlzr Rainfall Duration Incrementsl Inmease Value Here (e.g. 5 for 5-Minu[es) � Rainfall Rainfall Inflow Adjus[men[ Average Ou[flow Storage Rainfall Rainfall Inflow Adjustment Average OuNlow Storage Duration In[ensity Volume Factor Ou[flow Volume Volume Duration Intensity Volume Factor Ou[flow Volume Volume minutes inches / hr acre-Feet "m" cfs acre-feet acre-feet minu[es inches / hr acre-feet "m" cfs acre-fee[ acre-feet (inpul.) (outpuq (outpuq (output) (output) (outpuq (outpuq (input) (output) (outpuq (outpuq (output) (output) (outpuq p 0.00 � 0.000 0.00 0.00 0.000 � 0.000 0 0.00 0.000 � 0.00 0.00 0.000 0.000 5 3.73 0.048 1 .00 1 .00 0.007 0.041 5 8.78 0.285 1 .00 7.15 0.049 0.236 10 2.98 0.076 1 .00 1 .00 0.014 0.062 10 7.00 0.455 1 .00 7.15 0.098 0.356 15 2.50 0.096 0.83 0.83 0.017 0.079 15 5.87 0.572 0.83 5.96 0. 123 0.449 20 2.16 0. 111 0.75 0.75 0.021 0.090 20 5.08 0.661 0.75 5.36 0. 148 0.513 25 1 .91 0. 123 0.70 0.70 0.024 0.098 25 4.50 0.731 0.70 5.01 0. 172 0.559 30 1 .72 0. 132 0.67 0.67 0.028 0. 105 30 4.05 0.790 0.67 4.77 0. 197 0.593 35 1 .57 0. 141 O.fi4 0.64 0.031 0. 110 35 3.69 0.840 0.64 4.60 0.222 0.618 40 1 .44 0. 148 O.fi3 0.63 0.034 0. 113 40 3.40 0.883 0.63 4.47 0.246 0.637 45 1 .34 0. 154 0.61 0.61 0.038 0. 116 45 3.15 0.921 0.61 4.37 0.271 0.651 50 125 0. 160 O.fiO 0.60 0.041 0. 119 50 2.94 0.956 0.60 429 0.295 0.660 55 1 . 17 0. 165 0.59 0.59 0.045 0. 121 55 2.76 0.987 0.59 4.23 0.320 0.667 60 1 . 11 0. 170 0.58 0.58 0.048 0. 122 fi0 2.60 1 .016 0.58 4. 17 0.345 0.671 65 1 .05 0.175 0.58 0.58 0.052 0. 123 65 2.47 1 .042 0.58 4. 13 0.369 0.673 70 1 .00 0.179 0.57 0.57 0.055 0.124 70 2.34 1 .066 0.57 4.09 0.394 0.673 75 0.95 0.1ffi 0.57 0.57 0.059 0.124 75 2.23 1 .089 0.57 4.05 0.419 0.671 80 0.91 0.iS6 0.56 0.56 0.062 0.124 80 2. 14 1 .111 0.56 4.02 0.443 O.6fi8 85 0.87 0.189 0.56 0.56 0.065 0.124 85 2.05 1 .131 0.56 4.00 0.468 0.663 90 0.84 0.193 0.56 0.56 0.069 0.124 90 1 .97 1 .150 0.56 3.97 0.492 0.657 95 0.80 0.196 0.55 0.55 0.072 0.123 95 1 .89 1 .168 0.55 3.95 0.517 0.651 100 0.78 0.199 0.55 0.55 0.076 0.123 100 1 .ffi 1 .185 0.55 3.93 0.542 0.643 105 0.75 0201 0.55 0.55 0.079 0.122 105 1 .76 1201 0.55 3.92 0.566 0.635 110 0.72 0204 0.55 0.55 O.OS3 0.121 110 1 .70 1217 0.55 3.90 0.591 0.626 115 0.70 0206 0.54 0.54 0.086 0.120 115 1 .65 1232 0.54 3.89 0.616 0.617 120 0.68 0209 0.54 0.54 0.090 0.119 120 1 .60 1246 0.54 3.87 0.640 0.606 125 0.66 0211 0.54 0.54 0.093 0.118 125 1 .55 1260 0.54 3.86 0.665 0.596 130 0.64 0213 0.54 0.54 0.097 0.117 130 1 .51 1274 0.54 3.85 0.689 0.584 135 0.62 0216 0.54 0.54 0. 100 0. 116 135 1 .47 1287 0.54 3.84 0.714 0.572 140 0.61 0.218 0.54 0.54 0. 103 0. 114 140 1 .43 1 .299 0.54 3.83 0.739 0.560 145 0.59 0.220 0.53 0.54 0. 107 0. 113 145 1 .39 1 .311 0.53 3.82 0.763 0.548 150 0.58 0.222 0.53 0.53 0. 110 0. 111 150 1 .36 1 .323 0.53 3.81 0.788 0.535 155 0.56 0.223 0.53 0.53 0. 114 0. 110 155 1 .32 1 .334 0.53 3.81 0.813 0.521 ifi0 0.55 0.225 0.53 0.53 0. 117 0. 108 160 129 1 .345 0.53 3.80 0.837 0.508 165 0.54 0.227 0.53 0.53 0. 121 0. 106 165 126 1 .356 0.53 3.79 0.862 0.494 170 0.53 0.229 0.53 0.53 0. 124 0. 105 170 124 1 .366 0.53 3.79 0.886 0.480 175 0.51 0.231 0.53 0.53 0. 128 0. 103 175 121 1 .376 0.53 3.78 0.911 0.465 180 0.50 0.232 0.53 0.53 0. 131 0. 101 180 1 .18 1 .386 0.53 3.77 0.936 0.450 185 0.49 0.234 0.53 0.53 0. 134 0.099 185 1 .16 1 .396 0.53 3.77 0.960 0.435 190 0.48 0.235 0.53 0.53 0. 138 0.097 190 1 .14 1 .405 0.53 3.76 0.985 0.420 195 0.47 0.237 0.53 0.53 0. 141 0.096 195 1 .12 1 .414 0.53 3.76 1 .009 0.405 200 0.47 0.238 0.53 0.53 0. 145 0.094 200 1 .09 1 .423 0.53 3.75 1 .034 0.389 205 0.46 0.240 0.52 0.52 0. 148 0.092 205 1 .07 1 .432 0.52 3.75 1 .059 0.373 210 0.45 0.241 0.52 0.52 0.152 0.090 210 1 .06 1 .440 0.52 3.75 1.083 0.357 215 0.44 0243 0.52 0.52 0.155 0.088 215 1 .04 1 .449 0.52 3.74 1 .108 0.341 220 0.43 0244 0.52 0.52 0.159 0.086 220 1 .02 1 .457 0.52 3.74 1 .133 0.324 225 0.43 0245 0.52 0.52 0.162 0.083 225 1 .00 1 .465 0.52 3.73 1 .157 0.308 230 0.42 0247 0.52 0.52 0.165 0.081 230 0.99 1 .473 0.52 3.73 1 .182 0291 235 0.41 0248 0.52 0.52 0.169 0.079 235 0.97 1 .481 0.52 3.73 1206 0274 240 0.41 0249 0.52 0.52 0.172 0.077 240 0.95 1 .488 0.52 3.72 1231 0257 245 0.40 0251 0.52 0.52 0.176 0.075 245 0.94 1 .496 0.52 3.72 1256 0240 250 0.39 0252 0.52 0.52 0.179 0.073 250 0.92 1 .503 0.52 3.72 1280 0223 255 0.39 0253 0.52 0.52 0.183 0.070 255 0.91 1 .510 0.52 3.72 1 .305 0205 2fi0 0.38 0254 0.52 0.52 0.186 0.068 260 0.90 1 .517 0.52 3.71 1 .330 0.188 265 0.38 0255 0.52 0.52 0. 190 0.066 265 0.88 1 .524 0.52 3.71 1 .354 0.170 270 0.37 0.256 0.52 0.52 0. 193 0.063 270 0.87 1 .531 0.52 3.71 1 .379 0. 152 275 0.37 0.258 0.52 0.52 0. 196 0.061 275 0.86 1 .538 0.52 3.71 1 .403 0. 134 280 0.36 0.259 0.52 0.52 0.200 0.059 280 0.85 1 .544 0.52 3.70 1 .428 0. 116 285 0.36 0.260 0.52 0.52 0.203 0.056 285 0.84 1 .551 0.52 3.70 1 .453 0.098 290 0.35 0.261 0.52 0.52 0.207 0.054 290 O.S3 1 .557 0.52 3.70 1 .477 0.080 295 0.35 0.262 0.52 0.52 0.210 0.052 295 0.82 1 .564 0.52 3.70 1 .502 0.062 300 0.34 0.263 0.52 0.52 0.214 0.049 300 0.81 1 .570 0.52 3.69 1 .527 I 0.043 Mod. FAA Minar S[orage Volume (cubic R.) = 5,403 Mod. FAA Major Sforage Volume (cu6ic R.) = 29,304 Mod. FAA Minor Storage Volume (acre-ft.) = 0.1240 Mod. FAA Majar Storage Volume (acre-ft.) = 0.6727 UDFCD DETENTION BASIN VOLUME ESTIMATING WORKBOOK Version 2.35, Released January 2015 �A-1 �etention-basin-volume-estimating-workbook, Mod'rfled FAA 7I3l2024, 11 :18 AM DETENTION VOLUME BY THE MODIFIED FAA METHOD Project: Post-Development Basin DA-1 , NGL I BIOCHAR Basin ID: DA-1 Inflow and Outflow Volumes vs. Rainfall Duration 1 .s 1 .6 1 .4 � II 12 � � ,-. V v 1 w � v � U f0 . . . . . . . . . . . . . . .-. W . . . . . . . . . . . . . . £ �.8 7 � f • • • • � � � � � � � � • !f • � 0.6 � • • � � � � � • � • • � � • 0.4 � • � � � • � • � _ _ _ _ _ _, - - 02 _ _ - : - - - - ' _ _ „ - - � , � - - � • - „ � � � ,-, r� , , • �� '`� Or� u � , riC� C J + � _ J ClO � niiOi� � _ ._ � �� 3OO �� i � • OnOV � � � � � . . � . . . . . GC� �:� i " i � � �: nr� O �� lw , . 0 - - 0 50 100 150 200 250 300 350 Duration (Minutes) =.—Minor5mrminflowVolume �Minar5rormOuttlowVolume o Minor5rorm5rorageVolume �Major5mrminflowVolume �Majar5mrm0uHlowVolume e Major5mrm5mrageVolume UDFCD DETENTION BASIN VOLUME ESTIMATING WORKBOOK Version 2.35, Released January 2015 �A-1 �etention-basin-volume-estimating-workbook, Mod'rfled FAA 7I3l2024, 11 :18 AM DETENTION VOLUME BY THE MODIFIED FAA METHOD Project: Post-Development asin DA-2, NGL I BIOCHAR Basin ID: DA-2 (For catchments less ihan 160 acres only. For larger catchments, use hydrograph routing method) (NOTE: for catchinents larger than 90 acres, CUHP hydrograph and routing are recoinmended ) Determination of MINOR Detention Volume Using Modified FAA Method Determination of MAJOR Detention Volume Using Modified FAA Method Desian Information flnautl: Desian Information (Inoutl: CalchmenlDrainagelmperviousness la = 41 .00 percenl CalchmenlDrainagelmperviousness I, = 41 .00 percenl CalchmenlDrainageArea A = 17.900 acres CalchmenlDrainageArea A = 17.900 acres Predevelopmenl NRCS Sail Group Type = A A, B, C, or D Predevelopmenl NRCS Soil Graup Type = A A, B, C, or D ReWrn Period for Delenlion Conlrol T = 5 years (2, 5, 10, 25, 50, or 100) ReWrn Period for Delenlion Control T = 100 years (2, 5, 10, 25, 50, or 100) TimeofConcentralionofWalershed Tc = 10 minules TimeofConcentralionofWalershed Tc = 10 minutes Allowable Unit Release Rale q = 0.07 cfs/acre Allowable Unil Release Rale q = 0.50 cfs/acre One-hourPrecipi�alion P� = 1 .11 inches One-hourPrecipi�alion P� = 2.61 inches Design Rainfall IDF Formula i = C{ P�1�Cz+T�)^C3 Design Rainfall IDF Formula i = C{ P�1�Ci+T�)^C3 CoefficienlOne C� = 28.50 CoefficienlOne C� = 28.50 CoefficienlTwo C� = 10 CoefficienlTwo Ci =10 CoefficienlThree Ca = 0789 CoefficienlThree Ca - 0789 Determination of Averaae Outilow from ihe Basin (Calculatedl: Determination of Averaae Outtlow from the Basin (Calculatedl: Runoff Coefficienl C = 025 Runoff Coefficienl C = 0.41 Inflow Peak Runoff �p-in = 13.32 cfs InFlow Peak Runoff Qp-in = 5136 cfs Allowa6lePeakOulflowRale Qp-oul = 123 cfs AllowablePeakOulflowRale op-oul = 6.95 cfs Motl. FAA Minar S[orage Volume = 17,237 cubic feet Motl. FAA Major S[orege Volume = 51 ,100 cu6ic fee[ Motl. FAA Minor S[orage Volume = 0.396 acre-H Motl. FAA Major S[orage Valume = 1.173 acre-ft 5 <- EnlerRainfallDuralionlncremenlallncreaseVaCieHere e. . 5for5-Minutes) Rainfall Rainfall Inflow Adjuslmenl Average Oulflow Slorage Rainfall Rainfall Inflow AdjusUnenl Average Outflow Slorage Duration Intensity Volume Factor Oulflow Volume Volume Duralion Inlensity Volume Factor Outf�ow Volume Volume minutes inches / hr acre-feel "m" cfs acre-feel acre-feel minutes inches / hr acre-feel "m" cfs acre-feel acre-feel (inF'.�0 ou[ ul out ul ou ul oul ul ou[ ut oul ul in ul oul ul ou[ ul oul ut ou ul oul ut ou[ ul 0 0.00 0.00o a.oa o.oa o.000 o.oao a o.oa o.000 I o.00 o.oa o.000 o.000 5 373 0.115 1 .00 125 0.009 0.106 5 B78 0.444 1 .00 8.95 0.062 03ffi 10 2.98 0.183 1 .00 125 0.017 0.166 10 7.00 0707 1 .00 8.95 0.123 0.584 15 250 0231 0.83 1 .04 0.022 0209 15 5.87 0.890 0.83 7.46 0.154 0736 20 2.16 0266 075 0.94 0.026 0241 20 5.08 1 .027 075 671 0.185 0.843 25 1 .91 0295 070 0.88 0.030 0265 25 4.50 1 .137 070 627 0216 0.922 30 172 0.319 0.67 0.84 0.035 0284 30 4.05 1228 0.67 5.97 0247 0.982 35 L57 0.339 0.64 0.81 0.039 0.300 35 3.69 1 .306 0.64 575 0277 1 .028 40 1 .44 0.356 0.63 078 0.043 0.313 40 3.40 1 .373 0.63 5.59 0.308 1 .065 45 1 .34 0.372 0.61 077 0.047 0.324 45 3.15 1 .433 0.61 5.47 0339 1 .094 50 125 0.386 0.60 075 0.052 0.334 50 2.94 1 .487 0.60 5.37 0.370 1 .117 55 1 .17 0.398 0.59 074 0.056 0.342 55 276 1 .535 0.59 529 0.401 1 .135 60 1 .11 0.410 0.58 0.73 0.060 0.349 60 2.60 1 .580 0.58 522 0.431 1 .148 65 iD5 0.420 0.58 072 0.065 0.356 65 2.47 1 .621 0.58 5.16 0.462 1 .158 70 1 .00 0.430 0.57 072 0.069 0.361 70 2.34 1 .659 0.57 5.11 0.493 1 .166 75 0.95 0.439 0.57 071 0.073 0.366 75 223 1 .694 0.57 5.07 0.524 1 .170 80 0.91 0.448 0.56 070 0.078 0.370 80 2.14 1727 0.56 5.03 0.555 1 .173 85 0.87 0.456 0.56 070 0.082 0.374 85 2D5 1759 0.56 5.00 0.586 1 .173 90 0.84 0.464 0.56 070 0.086 0.377 90 1 .97 1788 0.56 4.97 0.616 1 .172 95 0.80 0.471 0.55 0.69 0.091 0.380 95 1 .89 1 .816 0.55 4.95 0.647 1 .169 100 078 0.478 0.55 0.69 0.095 0.383 100 1 .82 1 .843 0.55 4.92 0.678 1 .165 105 075 0.485 0.55 0.69 0.099 0.385 105 176 1 .868 0.55 4.90 0709 1 .160 110 072 0.491 0.55 0.68 0.104 0.387 110 170 1 .893 0.55 4.88 0740 1 .153 115 070 0.497 0.54 0.68 0.108 0.389 115 iB5 1 .916 0.54 4.86 0770 1 .146 120 0.68 0.503 0.54 0.68 0.112 0.391 120 1 .60 1 .938 0.54 4.85 0.801 1 .137 125 0.66 0.508 0.54 0.68 0.116 0.392 125 1 .55 1 .960 0.54 4.83 0.832 1 .128 130 0.64 0.514 0.54 0.67 0.121 0.393 130 1 .51 1 .981 0.54 4.82 0.863 1 .118 135 0.62 0.519 0.54 0.67 0.125 0.394 135 1 .47 2.001 0.54 4.81 0.894 1 .107 140 0.61 0.524 0.54 0.67 0.129 0.394 140 1 .43 2.020 0.54 479 0.925 1 .096 145 0.59 0.529 0.53 0.67 0.134 0.395 145 1 .39 2.039 0.53 478 0.955 1 .083 150 0.58 0.533 0.53 0.67 0.138 0.395 150 1 .36 2.057 0.53 . 477 0.986 1 .071 155 0.56 0.538 0.53 0.67 0.142 0.396 155 1 .32 2.075 0.53 476 1 .017 1 .057 160 0.55 0.542 0.53 0.67 0.147 0.396 160 129 2.092 0.53 475 1 .048 1 .044 165 0.54 0.547 0.53 0.66 0.151 0.396 165 126 2.108 0.53 475 1 .079 1 .030 170 0.53 0.551 0.53 0.66 0.155 0.396 170 124 2.124 0.53 474 1 .110 1 .015 175 0.51 0.555 0.53 0.66 0.160 0.395 175 121 2.140 0.53 473 1 .140 1 .000 180 0.50 0.559 0.53 0.66 0.164 0.395 180 1 .18 2.155 0.53 . 472 1 .171 0.984 185 0.49 0.563 0.53 0.66 0.168 0.395 185 1 .16 2.170 0.53 472 1202 0.968 190 0.48 0.567 0.53 0.66 0.173 0.394 190 1 .14 2.185 0.53 . 471 1233 0.952 195 0.47 0.570 0.53 0.66 0.177 0.393 195 1 .12 2.199 0.53 470 1264 0.936 200 0.47 0.574 0.53 0.66 0.181 0.393 200 1 .09 2213 0.53 470 1294 0.919 205 0.46 0.577 0.52 0.66 0.186 0.392 205 1 .07 2227 0.52 4.69 1325 0.901 210 0.45 0.581 0.52 0.66 0.190 0.391 210 1 .06 2240 0.52 4.69 1 .356 0.884 215 0.44 0.584 0.52 0.66 0.194 0.390 215 1 .04 2253 0.52 4.68 1 .387 0.866 220 0.43 0.588 0.52 0.65 0.198 0.389 220 1 .02 2266 0.52 4.68 1 .418 0.848 225 0.43 0.591 0.52 0.65 0203 0.388 225 1 .00 2278 0.52 4.67 1 .449 0.830 230 0.42 0.594 0.52 0.65 0207 0.387 230 0.99 2290 0.52 4.67 1 .479 0.811 235 0.41 0.597 0.52 0B5 0211 0.386 235 0.97 2303 0.52 4.67 L510 0792 240 0.41 0.600 0.52 0.65 0216 0.384 240 0.95 2.314 0.52 4.66 1 .541 0773 245 0.40 0.603 0.52 0B5 0220 0.383 245 0.94 2326 0.52 4.66 L572 0754 250 0.39 0.606 0.52 0.65 0224 0.382 250 0.92 2.337 0.52 4.65 1 .603 0735 255 0.39 0.609 0.52 0.65 0229 0.380 255 0.91 2.348 0.52 4.65 1 .633 0.715 260 0.38 0.612 0.52 0.65 0233 0.379 260 0.90 2.359 0.52 4.65 1 .664 0.695 265 0.38 0.615 0.52 0B5 0237 0.377 265 0.88 2.370 0.52 4.64 1 .695 0.675 270 0.37 0.617 0.52 0.65 0242 0.376 270 0.87 2.381 0.52 4.64 1726 0.655 275 0.37 0.620 0.52 0B5 0246 0.374 275 0.86 2.391 0.52 4.64 1757 0.635 280 0.36 0.623 0.52 0.65 0250 0.373 280 0.85 2.402 0.52 4.63 1788 0.614 285 0.36 0.625 0.52 0.65 0255 0.371 285 0.84 2.412 0.52 4.63 1 .818 0.593 290 0.35 0.628 0.52 0.65 0259 0.369 290 0.83 2.422 0.52 4.63 1 .849 0.573 295 0.35 0.631 0.52 0.65 0.263 0.367 295 0.82 2.432 0.52 4.63 1 .880 0.552 300 0.34 0.633 0.52 0.65 0268 i 0.366 300 0.81 2.441 0.52 4.62 1 .911 0.530 Motl. FAA Minor S[orage Volume (cubic tt.) = 17,277 MOU. FAA Major Storege Volume (cubic ft.) = 51 ,100 Motl. FAA Minor Storage Volume (acred[.) = 0.7957 Motl. FAA Major Storege Volume (acredt.) = 1 .1777 UDFCD DETENTION BASIN VOLUME ESTIMATING WORKBOOK Version 2.35, Released January 2015 DA-2 Detention-basin-volume-eslimating-work600k, Modified FAA �/3/2024, 1220 PM DETENTION VOLUME BY THE MODIFIED FAA METHOD Project: Post-Development asin DA-2, NGL I BIOCHAR Basin ID: DA-2 Inflow and Outflow Volumes vs. Rainfall Duration 3 � � i _ ��- 2.5 II 2 Y . . -.- . . . . . l . . . . . . ._ I � � W � . . . . . . . . . . . . . . � L � 1 .5 m � v E � j � _� I • • • � � � � � � � � • � � � � � • • • • • • 1 � � • • • � • � � � • � • � • • � • � • - ; _ � - � � � -�� - - • 0.5 _ _ - � �� l 1 �� 1 ' 1 i n r� � 1 1 I 1 IJ � � 1 J ! IJ U V G G �.� l.� � � � ` rl !�l U O D O Q 1'1 rl � - - . . . . � � , (1 � n �- � _ ' . _ . . i.l JO V �� l �J � 17 � ( . ;_i l '� - . . . . . . . -� I J 0 � - � u 0 50 100 150 200 250 300 350 Duration (Minutes) TMinor5mrminflowVolume �Minor5rormOutllowVolume . Minor5mrmSmrapeVolume �Major5rorminflowVolume —�Major5rorm0utflowVolume • MajarSmrm5mnpeValume UDFCD DETENTION BASIN VOLUME ESTIMATING WORKBOOK Version 2.35, Released January 2015 DA-2 Detention-basin-volume-eslimating-work600k, Modified FAA �/3/2024, 1220 PM STAGE-STORAGE SIZING FOR DETENTION BASINS Project: Post-Development Basin DA-21 BIORCHAR Basin ID: DA-2 o� saes� z su� s� z p� Side Slepe z A �, F7ow �� Flmv A W� � Wy W� � V Side Slope Z � < > SideSlopeZ E � � Slopev <_ _ _ _ _ _ _> L L Desiqn Information (Input): Check Basin Sha e W idth of Basin Bottom , W = 291 .00 ft Right Triangle OR. . . Length of Basin Bottom , L = 214.00 ft Isosceles Triangle OR. . . Dam Side-slope (H:V), Zd = 0.02 ft/ft Rectangle OR. . . Circle / Ellipse OR. . . Irregular (Use Overide values in cells G32:G52) MINOR MAJOR Storage Requirementfrom Sheet 'Modified FAA': � 0.40 1 . 17 acre-ft. Stage-Storage Relationship: Storage Requirement from Sheet 'Hydrograph': � acre-ft. Storage Requirement from Sheet 'Full-Spectrum': � ' acre-ft. Labels Water Side Basin Basin Surface Surface Volume Surface Volume Target Volumes for WQCV, Minor, Surface Slope Width at Length at Area at Area at Below Area at Below for WQCV, Minor, & Major Storage Elevation (H:V) Stage Stage Stage Stage Stage Stage Stage 8 Major Storage Stages ft ft/ft ft ft ftz ft2 User ft acres acre-ft Volumes (in ut in ut Below EI . (out ut (out ut out ut Overide (out ut (out ut lout ut for oal seek 5042.00 (input) 291 .00 214.00 62,533 1 .436 0.000 5043.00 0. 17 0.00 0.00 �� 65,463 63,998 � 1 .503 � � � 1 .469 5044.00 0. 17 0.00 0.00 � 68,450 130,955 1 .571 3.006 5045.00 0. 17 0.00 0.00 � 71 ,452 200,906 � 1 .640 � 4.612 5046.00 0. 17 0.00 � 0.00 74,650 274,057 �� 1 .718 I 6.291 � #N/A � I.. #N/A � #N/A � #N/A #N/A � #N!A #N/A I #N/A #N/A I #N/A #N/A � #N/A #N/A � � #N/A #N/A I #N/A #N/A I #N/A #N/A � #N/A #N/A I � #N/A #N/A I #N/A #N/A I #N/A #N/A � #N/A #N/A I � #N!A #N/A I #N/A #N/A � #N/A #N/A � � #N/A #N/A I I #N/A #N/A I � #N/A #N/A � I_ #N/A #N/A I I #N/A #N/A � � #N/A #N/A I � #N/A #N/A I I_ #N/A #N/A � � #N/A #N/A � � #N/A #N/A I � � #N/A #N/A I I.. #N/A #N/A � � #N/A #N/A � � #N/A #N/A I � #N/A #N/A I I.. #N/A #N/A � � #N/A #N/A I � #N/A #N/A I � � #N/A #N/A � I_. #N/A � #N/A - #N/A I #N/A #N!A DA-2 Detention-basin-volume-estimating-workbook, Basin 7/3/2024, 12:21 PM STAGE-STORAGE SIZING FOR DETENTION BASINS Project: Basin ID: STAGE-STORAGE CURVE FOR THE POND 5046.50 - 5046.00 5045.50 5045.00 .-. � 5044.50 — d . � � �. d � 5044.00 � � 5043.50 5043.00 5042.50 5042.00 0.00 1 .00 2.00 3.00 4.00 5.00 6.00 7.00 Storage (acre -feet) DA-2 Detention-basin-volume-estimating-workbook, Basin 7/3/2024, 12:21 PM Hydraulic C alcs - 18 CivilArts, Inc. AREA INLET IN A TRAPEZOIDAL GRASS -LINED CHANNEL BIOCHAR Basin OS-1 , Design Point (P-3) � TM� � f Grass Type Limiting Manning's n T � I A 0. 06 ,,� � B 0 .04 �� - ,�` � d C 0 .033 . "A°'`h D 0 .03 a_ d z,: 1 1 E 0 .024 � I - B �I, Malvsis of Trapezoidal Grass-Lined Channel Usinq SCS Method NRCS Vegetal Retardance (A, B, C, D, or E) A, B, C, D or E C Manning's n (Leave cell D16 blank to manually enter an n value) n = see details below Channel Invert Slope So = 0. 0080 ft/ft Bottom Width B = 0.00 ft Left Side Slope Z1 = 3.00 fUft Right Side Slope Z2 = 3.00 ft/ft Check one of the following soil types: Choose One: Soil Tvpe: Max. Velocitv (V��oY) Max Froude No. (F��oy) Q Sandy Sandy 5. 0 fps 0.50 Q Non-Sandy Non-Sandy 7. 0 fps 0.80 Minor Storm Major Storm Max. Allowable Top Width of Channel for Minor & Major Storm TM,,,X = 6.00 12.00 feet Max. Allowable Water Depth in Channel for Minor & Major Storm dM,,,X = 1 .00 2.00 feet Maximum Channel Capacitv Based On Allowable Top Width Minor Storm Major Storm Max. Allowable Top Width TM,,,X = 6.00 12.00 ft Water Depth d = 1 .00 2. 00 ft Flow Area A = 3.00 12.00 sq ft Wetted Perimeter P = 6.32 12.65 ft Hydraulic Radius R = 0.47 0. 95 ft Manning's n based on NRCS Vegetal Retardance n = 0.430 0. 052 Flow Velocity V = 0. 19 2.49 fps Velocity-Depth Product VR = 0.09 2. 36 ft^2/s Hydraulic Depth D = 0.50 1 .00 ft Froude Number Fr = 0.05 0.44 Max. Flow Based On Allowable Top Width QT = 0.57 29.91 cfs Maximum Channel Capacitv Based On Allowable Water Depth Minor Storm Major Storm Max. Allowable Water Depth dM,,,x = 1 .00 2.00 feet Top Width T = 6.00 12.00 feet Flow Area A = 3.00 12.00 square feet Wetted Perimeter P = 6.32 12.65 feet Hydraulic Radius R = 0.47 0. 95 feet Manning's n based on NRCS Vegetal Retardance n = 0.430 0. 052 Flow Velocity V = 0. 19 2.49 fps Velocity-Depth Product VR = 0.09 2. 36 ft^2/s Hydraulic Depth D = 0.50 1 . 00 feet Froude Number Fr = 0.05 0.44 Max. Flow Based On Allowable Water Depth Qd = 0.57 29.91 cfs Allowable Channel Capacitv Based On Channel Geometry Minor Storm Major Storm MINOR STORM Allowable Capacity is based on Depth Criterion Qa��ow = 0.57 29.91 cfs MAJOR STORM Allowable Capacity is based on Depth Criterion da��ow = 1 .00 2.00 ft Water Depth in Channel Based On Desiqn Peak Flow Design Peak Flow Qo = 0.12 5.84 cfs Water Depth d = 0.56 1 .48 feet Top Width T = 3.35 8.87 feet Flow Area A = 0.94 6. 55 square feet Wetted Perimeter P = 3.53 9. 35 feet Hydraulic Radius R = 0.27 0.70 feet Manning's n based on NRCS Vegetal Retardance n = 0.430 0. 118 Flow Velocity V = 0. 13 0. 89 fps Velocity-Depth Product VR = 0.03 0. 62 ft^2/s Hydraulic Depth D = 0.28 0.74 feet Froude Number Fr = 0.04 0. 18 Minor storm max. allowable capacity GOOD - greater than flow given on sheet 'Q-Peak' Major storm max. allowable capacity GOOD - greater than flow given on sheet 'Q-Peak' Basin OS-1 , Design Point Swale (P-3) .xlsm , Area Inlet 4/3/2024, 5: 14 PM AREA INLET IN A TRAPEZOIDAL GRASS -LINED CHANNEL BIOCHAR Basin OS-1 , Design Point (P-3) Inlet Desiqn Information (Inputl Type of Inlet Inlet Type = Angle of Inclined Grate (must be <= 30 degrees) 6 = degrees Width of Grate W = feet r Length of Grate L = feet Open Area Ratio . ARATio = 4nJ . ! . Height of Inclined Grate / HB = feet x ` �_ o Clogging Factor - - f Cf = Grate Discharge Coefficient '� _ 1��— I f�� Ctl = Orifice Coefficient " -_____ - - -- --�_ `� � � —� Co = Weir Coefficient - � - - _ �""- - _ R Cw = � -- .�"•i ��.o� S�. _. � 1 ��1�� 1 ' MINOR MAJOR Water Depth at Inlet (for depressed inlets, 1 foot is added for depression ) d = Grate Capacity as a Weir Submerged Side Weir Length X = feet Inclined Side Weir Flow Q� = cfs Base Weir Flow Qwe = cfs Interception without Clogging Qw; = cfs Interception with Clogging Qwa = cfs Grate Capacity as an Orifice Interception without Clogging Qo; = cfs Interception with Clogging Qoa = cfs Total Inlet Interception Capacity (assumes clogged condition) 4a = cfs Bypassed Flow, Qb = cfs Capture Percentage = Q,/Qe = C% % Basin OS-1 , Design Point Swale (P-3) .xlsm , Area Inlet 4/3/2024, 5: 14 PM DRAINAGE MAPS PRE -DEVELOPMENT DRAINAGE MAP POST -DEVELOPMENT DRAINAGE MAP - 19 CivilArts, Inc. � � � USE BY SPEC AL REV EW N0 . USR24 - XX - XXXX < � � a N � L0TS A & B 0F REC0RDED EXEMPTI0N 1471 - 28- 01 RECX17- 0182 IN THE N1 /2 0F SECTI0N 28, T1N , R66W 0F THE 6TH P . M . , C0UNTY 0F WELD , STATE 0F C0L0RAD0. AREA = 32. 870 ACRES, MORE OR LESS. � � > � z ; s , o `o Lo � .. f � � g0�`� o h : Q J F � � n I = � z �� l SOS � = � � ! i ; � �xaw �N�E �R��r.oF.wA�E��EMFOR � � � ;'� SITE S0ILS MAP � � � � EXISTINGAGGESS _! UNIO @RQFIGEIEGTRIGAS50GIATION REG NO. 2029483 � ' � �� i POIM(IN�USTRIAL� ui5x� � �� —T ' CyJ v,ne �BW FENCE � � � � C > > • ' I N8995'0] E 822.11' � '. I � ��, � _rn E�. � _.� ,� �_ . — . . I � � � / ; � ;: o,� r�a FeNce � oircH i ' I l 85 � ,'uz � � • I � �`. - — — s o��w — — � o �TLPFENCE ' � 85 ; ��1 � � ,' �o � � ,.4z�o � � � � , � � y�� . . � � � � %, 12 CMP CULVERT . . � � � � � 56 w @' � P • VI �iQTE . LV ��b � �A seor � �. ...� � 50�A�COESSEASEMENT . 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NO. 31081]6 ♦ . .. � � � I� �� o .�� -�� .�' �� '�.�� # GROUP SOIL CLASSIFICATION exisnNcmiNORcoNroua � � � `n� �I � ♦ � OWEY FlNE SANOY LOAM, � 7C . i I �i �� ea5iNFlowuNerc � 46 e o io 1 PeRceNi 5LOPe5 PROPOSEDFENCE � : :� I J � � I I � �� r��i ��ry� �� ■ �� aave�aono ' ' � � , � oude7 �FiRe 5nNov �onM, � � SWALEFLOWLINE � V � � � o �� /'r� � �� p 47 B 1 TO 3 PERCENT SLOPES � � • I E%GWH �ROYSW�M3 /\ � /� 1� I 1 � PRIME FARMLAND � � � � 1 � � / � � � � � � 11 � � � � � 11 � � � SOILDELINEATIONLINE � OWNER'. � � I I' � o j � NGL �PBPN�ONE�)V d Q,Q� 0.13 '9� �� STLPFENCE Q i J[+tIEYMBRWGH I '� a j a� `' 0.136.49 ' �1� " RENOHILL CLAY LOAM, � � � � � LIMITSOFSUB-BASIN � �RIVEINAY � h� �� . 58 D 0 TO 3 FERCENT SLOPES � � � � � I � I� I /�� FARMLAND OF STATEWIDE IMPORTANCE � � � � f �0 '7. 72°0' 1 � = A % � �p � ' s VONA SANDY LOAM. 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Sc5a �1 � — ' _ r— _��— '��i - � ♦ ��r s��,�� ;o, ° � PRE - DEVELOPMENT DRAINAGE RUNOFF SUMMARY -�- - _ _ _ _ -� _ _ _ _ _ - - - - - - — �,9..U,.-- - - s'is� - - — — �— I� - - - - � I I � I � � ,�,� N �� ... . _. wFouce 0S- 1 .'�� . ,' �\ � � , � DESIGN DRAINAGE AREA HYDROLIC IMPERVIOUS p2 p5 410 4100 '�`v o C2 C5 C10 C100 � o „�r�� ', � YARBFOUGHAG`tES, IMPFRVI USAREA5: R ♦ ^' '^^ �\ � '�� BWLOINGS 1I2WSF O� 0010.12 �� ' 1 .� POWT BASINS (AC) SOILGROUP (/o) CFS CFS CFS CFS � • ORNEWAYS= 30,8IPSF �`�9\ 0 �35.8Q �� zo �V � � � " � �� " � . � � P1 EX-f 257 A 20 0.1 0.11 0.12 027 1 .77 2.54 3.44 14.37 . � � U�� o *� �� I � �; `O � � p � EX-2 17 A 2.0 0.01 0.01 0.01 OA3 0.08 0.13 OA9 6.49 � � -.. � �' _ - �� I . P � � � �� f, O O .Q � - , - '�� ' � ,' � 3 OS-1 16 A 2.0 0.01 0.01 0.01 0.13 0.08 0.12 0.17 5.84 � � � W � POND ♦ . � � �I I �� "'� O C7 � � �.. �i � BPSWFLOW �1,� P� ��, �� w �1� I � ��\�� LWETG - � �y z z , . ��rr� `. � , .A.��N�� ` �I II �, � -. o .,.,,,....... : �c , i ' QJ� FEMA MAP � � � q w '�pu��u�u� �r� � u� nu.ur� �� . . ��' F� � ,� ♦ '• �� ` \ � � � y � PER THE FEMA FLOOD INSURANCE RATE MAPS (FIRM), MAP NO. 08005C0186K; � O O � � O �� ` ` � �'�, II �' O� � HAVINGAMAPREVISEDDATEOFDEC. 17: 2010; INDICATESTHESUBJECT /1 a w � 46 � � ;� ��. `\ '�. 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ALPHAENGRGL5259371998" � � � � , I� C -4 . 1 wwz � � 0.3' BGL. � LL3 � � a � o � dEo Of � � � USE BY SPEC AL REV EW N0 . USR24 - XX - XXXX < � � a N � L0TS A & B 0F REC0RDED EXEMPTI0N 1471 - 28- 01 RECX17- 0182 IN THE N1 /2 0F SECTI0N 28, T1N , R66W 0F THE 6TH P . M . , C0UNTY 0F WELD , STATE 0F C0L0RAD0. 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ALPHAENG�RGL525937 ?996" - /� wowz � ��'�_� - 0.3' BGL - � �� . /� � LL3 � � a � o � d E o n�` Copies of Graphs , Tables , and Nomographs Used - 20 CivilArts, Inc. TABLE 1 RUNOFF COEFFICIENTS AND PERCENTS IMPERVIOUS LAND USE OR SURFACE PERCENT FREQUENCY CHARACTERISTICS IMPERVIOUS 2 5 10 100 Business: Commercial Areas 95 . 87 . 87 . 88 . 89 Neighborhood Areas 85 .60 . 65 . 70 . 80 Residential: Single-Family (* *) (*) .40 .45 . 50 .60 Multi-Unit (detached) 60 .45 . 50 .60 .70 Multi-Unit (attached) 75 .60 . 65 . 70 . 80 1/2 Acre Lot or Larger ( *) .30 . 35 .40 .G0 Apartments 80 .65 . 70 . 70 . 80 Industrial: Light Ai•eas 80 .71 . 72 .76 . 82 Heavy Areas 90 . 80 . 80 . g5 90 Parks, Cemeteries 5 . 10 . 10 .35 .60 Play�counds 10 . 15 25 35 .65 Schools 50 .45 . 50 .60 .70 Railroad Yard Areas 15 .40 .45 . 50 .G0 Undeveloped Areas : Historic Flow Analysis, Gceenbelts, Agricultural 2 (See °Lawns") Off=Site Flow Analysis (when land use not defined) 45 .43 .47 .55 . 65 9 . 2010 TABLE 1 (continued) RUNOFF COEFFICIENTS AND PERCENTS IMPERVIOUS LAND USE OR SURFACE PERCENT FREQUENCY CHARACTERISTICS IMPERViOUS 2 5 10 100 Streets: Paved 100 . 87 . 88 . 90 .93 Grave l 40 . 15 . 25 . 3 5 .65 Concrete Drive and Walks 96 . 87 . 87 . 88 . 89 Rooi's 90 . 80 . 85 . 90 90 Lawns, Sandy Soil (A and B Soils) : 2 2% Slope .0S . 06 . 0g . 10 2-7% Slope . 10 . 1 l . 13 . 15 >7% Slope . 15 . 16 . 1 g . 20 Lawns, Clav Soil (C and D Soils) : 5 2% Slope . 13 . 14 . 15 . 17 2-7% Slope . 18 . 19 20 . 22 >7% Slope 25 .27 . 30 .35 NOTE : These Rational Formula coefficients may not be valid for large basins (*)See Figures RO-3 throi��h RO-5 of USDCM Volume 1 for percent impervious. (* *)Up to 5 units per acre . Single-family with more than 5 units per acre, use values for multi - unit/detached 9 . 2010 TABLE 2 Roughness Coefficients ("n ") for Channel Design (after Chow 1959) Roughness Coefficient (n) Channel Type Minimum Typical Maximuin I. Excavated or Dredged 1 . Earth, straight and uniform a. Gravel, uniform section, clean 0. 022 0. 025 0.030 b . With short grass, few weeds 0. 022 0. 027 0.033 2. Earth, winding and sluggish a. Grass, some weeds 0. 025 0. 030 0.033 b . Dense weeds or aquatic plants 0. 030 0. 035 0.040 c. Earthy bottom and rubble/riprap sides 0. 028 0. 030 0.035 3 . Channels not maintained, weeds and biush uncut a. Dense weeds, high as flow depth 0 . 050 0. 0g0 0. 120 b. Clean bottom, brush on sides 0 . 040 0. 050 0.080 T[. Natural streams (top width at flood stage l00 ft) 1 . Streams on plain a. Clean, straight, full stage, no rifts or deep pools 0. 025 0. 030 0.033 b. Clean, winding, some pools and shoals, some weeds 0. 035 0. 045 0.050 and stones c. Very weedy reaches, deep pools, or floodways with 0. 075 0. 100 0. 150 heavy stand of timber and underbrush III. Lined ar Built-Up Channels 1 . Concrete a. Towel/float finish 0 . 011 0. 015 0.016 b. Shotcrete 0 . 016 0. 020 0.025 2. Gravel bottom with sides of: a. Formed concrete 0 . 017 0. 020 0.025 b. Random stone in mortar 0 . 020 0. 023 0.026 c. Dry rubble or riprap 0 . 023 0. 033 0.036 3 . Wetland Bottom Channels See Fi�ure 6 4. Grass-Lined Channels and Swales See Fi�ure 7 (Source: USDCM, ltolume 1, Majar Drazna�e, 04/2008) 9 . 2010 TABLE 2 (continued) Lar�e Conduits : Conci-ete: Manning ' s n Precast concrete pipe, ord 'ulary joint alignment 0 . 013 Poured in place, steel forms, projections 1 /8 " or 0 . 013 less Poured in place, smooth wood forms, 0 . 013 projections 1 /8 " or less Poured in place, ordinary work with steel forms 0 . 014 Poured in place, ordinary wark with wood 0 . 015 forms Steel : Structural plate corrugated, 2 "X6 " corrugations, 0 . 0377 5 ' to 20' diameter D0 . 078 Corrugated pipe, 1 "x3 " corrugations, 3 ' to 8 ' 0 . 0306 diameter �0 . 075 Plastic/HDPE : Pipe with smooth interior wall 0 . 012 9 . 2010 o.s - � - I �� - o a j—�— — � I _ os � � , Channe! capacity ;' design curve � o.z f : � _ _ ! I � ` I _ � I � � � Z �.1 (C) ! Retardance I I Z os � . , ! D . � � li I Os r _ _l J I a , � .as i / f , _ i ; 04 - - , . � , Limrting velacity -- � I �� 03 F desigM curve �� I 02 — I� ' o. r o.2 a.3 a a o.s o.e o.a � .0 2 s a s s s ia z� s4 VR, PRODUCTOF VELOCITYANQ HYDRAULIC RADIUS �rom "Hanclbook o( Channet Design For Soii and Waler Conservalion,� U .S. Department of AgriculCura, Solls Conservatio� Sertvice. No• SCS-TP-61 March , 1947, Rev. June, 1954 Figure MD-9b—Manning's n vs. VR for Two Retardances in Grass-Lined Channels. (Souv�ce: ZISDCM, Vvlume, Mczjor� Dr•aiy2age, 04/2008) FIGURE 7 9 . 2010 BIOCHAR PROCESSING CR 6 , LLC DUSTABATEi�iENT PLAN M a rc h 20, 2024 The proposed operation has the potential to create dust from the following sources : - The conversion of biomaterials into biochar - The movement and stockpiling of biomaterials and equipment - Truck, vehicle traffic on internal site �ravel roadways and parkin � areas As such , the facility operator is committed to abatement of dust, in order to protect the health , safety and welfare of surrounding property owners and facility users. A contracted water truck will be used to spray on - site roadways, dust prone areas, storage and parking areas and areas where biochar is transferred from kilns to transit containers on a periodic basis, yet to be established . As needed , mag chloride may be utilized , to be applied by a third - party provider. The frequency of water and supplemental chemical applications are expected to vary based on seasons and weather patterns, with increased abatement necessary in warmer and drier times of the year. Any dust complaint will be properly evaluated and abated should conditions and source warrant action . Page 1 of 1 BIOCHAR PROCESSING CR 6 , LLC LIGHTING PLAN M a rc h 20, 2024 The facility will be operated with minimal obtrusive lighting . All lighting will be downcast and shielded and/or the light producing features will be recessed into the lightin � fixture housing to prevent any direct light from becoming visible outside of the property boundary. Li �hting is anticipated to be LEDs and a mid - ran �e color temperature of 3000-5000K. All lighting will be automated with the abilityfor manual operation . Building- mounted Li�hting The proposed modular office building and control buildin � will each have wall- pack lighting, as required per building codes and for safety. Such li�htingfixtures may be retroactively attached or may be pre -installed into the structure . Pole - mounted Lighting Pole - mounted lighting will be present on the property, as needed . Standalone light poles are proposed at the entrance of the facility and in the main operations yard , for safety and identification purposes. Electric and building permits will be obtained . Any light pole will be 25-feet or less, with the light fixture at or below that hei�ht. Equipment Lighting The proposed master power distribution center will have light, as well as on all power control centers, which serve a group of four kilns, for safety and operational purposes . Li�hts will be located on poles, extendin � out of the equipment, up to 20-feet in height. Truck Li�hts Truck lights will not impact surrounding properties owners, once a truck has entered into the proposed facility, the proposed fencing will block direct truck lightin � from adjacent properties . Page 1 of 1 Facility Operational Noise Modeling Report May 22, 2024 Prepared for : BioChar Processing CR 6 LLC 1142 Judson St. Longmont, Colorado 80501 Prepared by: Behrens and Associates, Inc . 2320 Alaska Avenue El Segundo, California 90245 � ,. - � F � • Y • �� I " --•�_ �. � Simon Kim Jason Peetz Senior Acoustical Engineer Engineering Manager Corporate Office: EI Segundo, California Garson, California � Aledo, Texas � Longrnont, Colorado � Smithton, Pennsylvania � Red Deer, Alberta Oakland, California � Johnson City, Tennessee Phone 800-679-8633 � Fax 310-331 - 1538 www.environmental-noise-control. com � www.drillingnoisecontroLcom Behrens and Associates , Inc . ' Erzvironmental Nozse Corzti•ol �' `�° �" .; 1 . Introduction The purpose of this report is to provide a noise assessment of the facility operations associated with the proposed site located in Weld County, Colorado . The facility site is shown in Figure 1 - L The following is provided in this report: • A brief introduction of the fundamentals of noise • A review of the noise standards applicable to the project • A discussion of noise modeling methodology • An assessment of the potential noise impacts associated with the proposed facility operations adjacent to the site. '�4� r 91 - - - - - - - - `'`� « �" �� _ � ; , =E `:- , w� .# ._: � � � - � ) �y , � . � � �;L' ' � , � � � i�y ��-,�.�'J. _ . • _ 1 ' .r_ y __ 1`L il� I i �q-1 ' h 'NY^�1F �'�' ti' .I Y . 1�� r . y �i '�.�- y �1 • •�' , . • I� � 1 • ♦ � Y Y � It `, . Y � } �� i � � � . h �' � / / . /� '� I� � I� � I � � � ny�. � � � � �! (�y � � � �M � . — . � � � • � � . � .r . . ' � '�• � j � �•L Y �I � ' 4�� . i � (I� _ � + . . . I . 3��yi I '� � !� �J1 1 �_ � � *.� . A . . . � �, � . �i `-. 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LYilrll� i � ..� '� . .-�. � ; g � ��1111lI � . • � �� y � � . r �� _ M . � �'f'J� ,�, • l .- ' ` �' . � '. � '� � 6 ` . . � ,. � r � � " ' �r -f�i/ � ' . ' � .. ��. i '.�� ,t.. �� . � , �!� ,[ � �•I ' I G�� _ + ' � ` `� . . � . ' J � �T ' _ �� -� . . � I f �� 1 "� K r . � .v � U . � � �. Y � � �T S �.� � �� . � �' � �� IF �� i �. .. �1 ' J • ` �� . _ ` � ��t . " n ,_., * L' __ I i �� ' '.. � • . • ry , 1 � � ' �r a � ' `-r �� : +� -� y � ' ? �� >� i y• ` ': J _ '�i' a . .�; � il; r'5 � �, � „ . ' ' I� t f .� �.i I .n 1�t��!), . �k1 ' . � � V �t - � � . ' � ;., /`��'� f. � -.. f�• � � . � � y � . r [ � n ._��.� WX� F� i ' 4 '.I��J � . fi ` � . '. �.� � I�� .� 4 � — ' _ c. � - � > > : � r '� " . . � � 6 ,k:a� . _ � �� . --. . . - ,r� i r . � � 1 ��1 7 . �� I._ . � � .� . • � -. . _ •` 1� �� . . I � �i ��y , i 'v'1� __ � �� - - �yI�. . � . '� '� � ��4 _' _, Myl.. 1 _, r i I ' , r' . ': ��A �I1I � �� f � _ �i t�� ,. f tiy ' II� � ��I �ud �il� i . �\ r �� I � � S�. � . �' ��_� , . _ _ � 7� R*�4��. �'-�J`� s_�+ � .:.,, , ♦ . ds: eR _ . - � F �� +� .. �_ �- .. way ..e.�r ..r � ' ..�� N �_ .- _ . j :� '� ' I � �y " . h,�� . �; :: 1N ' - - _ � ... - _ h . � ` � .._ . ,..., � . - �' }� . .� - '�: • .. . Y :. . .� ��{/ � .. +� v�r�',n . �� ^� � , � �t, _ . �� ?.�_� " � _ ! �'� �> • � . _ ��11� . Figure 1 -1 Proposed Facility Site and Surroundings Introduction Behrens and Associates , Inc . ' Erzvironmental Nozse Corzti•ol �' `�° �" .; 2 . Noise Fundamentals Sound is most commonly experienced by people as pressure waves passing through air. These rapid fluctuations in air pressure are processed by the human auditory system to produce the sensation of sound. The rate at which sound pressure changes occur is called the frequency. Frequency is usually measured as the number of oscillations per second or Hertz (Hz) . Frequencies that can be heard by a healthy human ear range from approximately 20 Hz to 20,000 Hz . Toward the lower end of this range are low-pitched sounds, including those that might be described as a "rumble" or "boom". At the higher end of the range are high-pitched sounds that might be described as a "screech" or "hiss" . Environmental noise generally derives, in part, from a combination of distant noise sources . Such sources may include common experiences such as distant traffic, wind in trees, and distant industrial or farming activities . These distant sources create a low-level "background noise" in which no particular individual source is identifiable. Background noise is often relatively constant from moment to moment but varies slowly from hour to hour as natural forces change or as human activity follows its daily cycle. Superimposed on this low-level, slowly varying background noise is a succession of identifiable noisy events of relatively brief duration. These events may include the passing of single-vehicles, aircraft flyovers, screeching of brakes, and other short-term events . The presence of these short-term events causes the noise level to fluctuate. Typical indoor and outdoor A-weighted sound levels are shown in Figure 2- 1 . CQMMON 4JUTQQQR NOISE L�WEL �QMh"ION ff� �OdR ,a;r SOUP�D LEVELS d8 (A} 5OUND LEVELS " , . . �, � � �� r .� . ' 3'l D Rock eand _ ,� � ��' I Z _ - �v%� �`� �� 1QU Inside Subway Train •�..� _ 6-7d7-2OD Takeoff at 2 mi. (New York} y;3 Gas Lawrr Mower at 3 ft. Qiesel Truck at 1S0 ft. g� Food Blender at � ft. DC-9�-30 7akeoff at 2 mi. Naisy Urban Oaytime — $,� Garbage C]isposaE at 3 ft. Shoufir�g a1 3 ft. �� B-757 Takeoff af 2 mi. Vacuum Cleaner� ; ; �fl at 90 R. - _ g �`-� ,, � r e �� Gommercial ,4rea �� I+ J �` . ---', � ., .. Nprmal Speech t,s �I_ �� ul �� ' � . ` �'� 6G a[ 3 ft. �� E.._4' _ ` . "�- - � '� �t J ��Qui ke llr6an aaytime �� -$�9e Business Office �ishwasher Next Room c�uiet t#rban N�ghnime _ dQ Small Theatre, Large Conferer�ce Raom •y„� QuSet Sutiurban Nighttime (Backgrouo�d� '� I an Library ,�-�,�� Qwiel Rurai NighStime ,� , Bedraom at klight -�r�d Cancert Hall (BackgroundN�l . . 2p � :� ' ' °d : _ _,� �roadcast 8 Recording "'. z , t �'� - � Sfudiv . '- - 10 P��_ - Y � �� I♦ ' - �4 � V . ' � ' . . J '�� _ � �� ' . �' .. I��r': . . . '� 0. 3hreshold flf He�ring Figure 2-1 Typical Indoor and Outdoor A-Weighted Sound Levels Noise Fundamentals Behrens and Associates , Inc . Erzvironmental Nozse Corzti•ol �' `�° �" .; 3 . Noise Standards 3 . 1 Noise Standards The proposed site is located within Weld County and not within the limits of the City of Fort Lupton nor the City of Brighton. Therefore, the Weld County Municipal Code, which applies to unincorporated county land, has been used in this assessment. The Weld County Municipal Code states noise limits as below: CHAPTER 14 — Health and Animals ARTICLE IX Noise Sec . 14-9-40 . Maximum pennissible noise levels . A. Sound levels shall be measured as provided for in Section 14-9-50 below. B. Sound levels are hereby established for each type of property during specific hours of the day. Any sound level which exceeds the level set for a type of property at any time of day is prohibited. Land Use Maximum Noise (dB(A)) Maximum Noise (dB(A)) 7 : 00 a.m. — 9 : 00 .m. 9 : 00 .m. — 7 : 00 a.m. Residential Pro e or Commercial Area 55 dB A) 50 dB A) Industrial Area or Construction Activities 80 dB(A) 75 dB(A) Nonspecified Areas 55 dB(A) 50 dB(A) C . Between the hours of 9 : 00 p.m. and 7 : 00 a.m. , the noise levels set forth above may be exceeded by up to ten ( 10) decibels for up to fifteen ( 15 ) minutes in a one-hour period. Sec . 14-9 -50 . Measurement and classification of noise A. For the purposes of ineasuring a noise to detertnine if a person has violated Section 14-9-40 above, the following requirements for measurements must be met: 2 . A noise originating on private property sha11 be measured at or within the boundary of the property from which the noise complaint is made. 3 . A noise shall be measured on a weighting scale on a sound level meter of standard design and quality and in an accordance with the standards promulgated with the American National Standards Institute . The operation will occur only during the daytime. Therefore, the operational noise will be assessed against the Weld County Daytime noise limit of 55 dBA. Noise Standards Behrens and Associates , Inc . ' Erzvironmental Nozse Corzti•ol �' `�° �" .; The proposed site is categorized as agricultural zoning from the Weld County property portal data as shown in Figure 3 - l . _ � �, ��i �'� , �, e��r: rc�vl?.e��iax�N Y�9 I. 9� I� _ �� : . . . . i �� i �\ - � � V�, � 61 �� 1 . , vwnnm9 Gose�. P.L; A Conl� f - �_un..,(w.i .. :w�..�,n��:�el .=�imal'. . ;Hei9noeeneoa !ammenisl � ' -� �1p11PIMICS�I'�11IInIGLYI' ■ _: ��ITC5f l.1lnAlf'IC1�1 ■ bilFO.]11Yiry CJfnmNaa�l �. E �Ei1Nr1 �-� I�n�uslnall � < I��•t�ll511ixIY -i �.. i � .Li' Ip M1 I1 �) Figure 3-1 Zoning Map Noise Standards Behrens and Associates , Inc . Erzvironmental Nozse Corzti•ol �' `�° �" .; 4 . Operational Noise Modeling 4. 1 Noise Modeling Methodology The noise modeling was completed with use of three-dimensional computer noise modeling software. All models in this report were developed with SoundPLAN 9 . 0 software using the ISO 9613 -2 standard. Noise levels are predicted based on the locations, noise levels and frequency spectra of the noise sources, and the geometry and reflective properties of the local terrain, buildings and barriers . To ensure a conservative assessment and compliance with ISO 9613 -2 standards, light to moderate winds are assumed to be blowing from the source to receptor. The predicted noise levels represent only the contribution of the pyrolysis processes and do not include ambient noise or noise from other facilities. Actual field sound level measurements may vary from the modeled noise levels due to other noise sources such as traffic, other facilities, other human activity, or environmental factors . Sound level data utilized in the noise model was derived from field sound level data measured on Tuesday, March 26, 2024, while normal pyrolysis processes were occurring at an existing site located at 19500 County Road 7 , Berthoud, CO . The predicted modeling results are dependent on the biochar equipment layout, orientation, and operating conditions . Changes or additions to any equipment (e. g. , generators, motors, log loader trucks, pumps, etc .) or enclosures housing equipment may result in operational noise levels that are inconsistent with the modeling results . Based on the provided layout of the proposed site shown in Figure 4- 1 and Figure 4-2 , the facility operational noise model was constructed. The noise model was created to represent the full and normal facility equipment operation (in terms of noise) including 10 KILNs, one shredder, one screen, and diesel generator at the proposed site. Operational Noise Modeling Behrens and Associates , Inc . ` , '� Erzvironmental Nozse Corzti•ol �' `�° �" USR2 �F - 0 [1XX �, LISE 6Y SPEGIAL REVIEW {�� r}rf �-• Fc,�.. s .�.,. ! �� , -. . Z y� 1.. .. ] I. 4. . . Li�L{ ' !' ii' 1 . . . � . . . . . a��—u .•r .v� F �eY a�i— s YNIUJa [CK'. �, � � � ., � .. LCGCMO �� . � - . i . � w � i _ 5 �. ♦ • � � �� ' -`L . . s �.... . rRi ... _ . � � .n.� �.. . 1 .♦ r � • . . . I iE.��.S: �s.E � �. � • e �wl� �....�.. I - � � ��is��. � . . C�1 _tiCr. � � LF .— - '� � ' y: " _ � � � �� • � � � - - � 4Gbl'8'+l I eh r" . �}�-\�'V�j�''�� — iRJl1 y �} 4` t � �� I • . ('ikL'Ii4rL lT �i/ I'�� . / � I • <�.' I? � r � 4�L� � y I �W . I w �e.�i.w. rr� � � ' e�t_ �� Cne" ��'MW' _✓i ; a.�Ju'[ re�z�.w n I I r� qOdCN'bE I �-+axc; �i q a Y • ` �-�.�-� I �/ e � _ I �. � .. � � Gi�l'� Fn1G { � � � I I I I .�qeQtxC�] }R' � � � � � � ^ � � � . / � � � I , � - `= " � � y �.. . ..n. �. . � .:�' . . � / � ,\ ! tP�+AYYM�aui � . �.• —� � . IArRQY[S�EMT LI'JTI Iwi �e f XJ n . � . r.e.-� �. . :.. � . .. .. • I ff� L r _ __ �f Y�� • � l v. .. e , i. ' . . - � .. . - . � � �� 1 T� $$ ♦ • . .�. . . � _ _ _ } J LY� FG 1 8 � I� C� 'n .� N�NI 9 . � . - � l��..� . � uuv� �V � � I ^�v-. wau� 0 �i.�n�- . -.. .. c_�. '. I . 1' .r, �. I - .' ILY�1[ � � � I • i _ � ' \ . � n �.xie��a_W:� � • . . :� . . �cci� u.:.• h. � �iE. l I �� I � � , .L_ L �IS\ 1 [uNa�l � ' I I �I�.�PIC�\V !� lYit.�l \�fiYl��i� � .I:�G�..� 1 urccamonwm ..J ��fuanu. r•l n �j � . � .�r.� ��a �� i I I rO �Yuuu. l ( v �_� � / •Y. 1 '} : Y .�\ �w ; � � ♦ —� _ �, ��:�:� . .., f I .run a�.�rti�am'.:. � I 1 I � . �v vl�� . .� A i . W01 �^ � ' ' — j -T f - �: . . _ _ _ 56y.:'.JMi . �uf . i � • i� v ��e�s� � • ^f 1 niN �Y' a � . I S 1p . I��W 1(tV ' , , �_Y • i�i N� I�..Y� f." • .. . � I ' . . . . �. . . ' . .. . . . . • . . . a- .. _ .�n� r�', i . �1 � +1".lL . bYM r i . • .• ' '. .. . �a. � Fi�� , v . . • � ] MISC MoiCO uL�+�' Z�_��x� ` � �, 2 - — . ., _ _ �.. . _ . . . . ._ _ t .. � PAG [iOA �` � �l . . � , . ;.'� .c. . site n�sw e n.ere��s M A iP RI M G � .�.1 . - . _ . 4 •. .. I C /�. .. .: N4. Y \� �� _.� . a c . . a \[ I . l ,� I c • ! v .�n � v . - Figure 4-1 Proposed Site Layout „ � �C�NY�I��IC7fJ F�4�GILJ�Y �'�, ` ��, � .. . . . .. , �. , , : , :_ � � . . , _ „ , , r, 's I , . . , , .. . . . � � II � �s� "� � �- ''� � � - � � � � � I {.? � Q � — 4 " ' C7 . Y�o ;4,� , . • � ='� ,- '.; HF�,YY �qUIPMEhT. FLd:T�EG�.�ER � � _ � ' - ' - " .- fR�.V�s� ENaLC�b.7ER. F�^��+:l.�P C} 9. � � = . ' 7� ��. . = , ' ` :PJ �._ FCi '..M.$�{��;� : ' '� � . , . . ., 1 ! I J y 6„'l y e 1 ! 1 iJ . i.a� .. .. =i �'111�LIE SC' �' �'�'1 _� 4 � 1 . 4 � � . " � f .. � " . . � ' • x ` � I ! � J _ ! '4 �� I ��, � �M1 .. I �� k '. - . ` �.� � — �ti � bF � �~ � 5 ;f�nnrP�s rnec '�' �� r � � � t "e�� --. f� �r '�/ - � 1 l5,L� r='^� a-`� - � �y r , � �T .T� �5S �1 �I�_ �..J ��II�JY$ � h, _'{ #+� h; #�=h *!� #�3 #ti � � �,�� _ . I • , p �, s�� 'v� �c, � �oo `_ p - � .. , 4 � _ y � ' �YI1 � ' . • I L * I � � rrt , �. ,� I �,� ; _ ._ � _ . m. .� ,� ,a e-:�e. �.+�r.w un,�:.,; •,� Figure 4-2 Modeled Equipment Locations Operational Noise Modeling Behrens and Associates , Inc . Erzvironmental Nozse Corzti•ol �' `�° �" Three scenarios (Scenario 1 , 2 & 3) were created to represent each operation at the proposed site. The details of three scenarios can be seen in Table 4- 1 . Table 4- 1 Predicted Noise Levels (dBA) Operation Scenario 1 A Screener Scenario 2 A Shredder Scenario 3 Pyrolysis process ( 10 KILNs and 1 Generator) The sound power level and quantities of equipment for each modeled scenario included in the noise modeling is provided in Table 4-2 . Table 4-2 Sound Power Levels of Equipment of Each Scenario Operation Equipment Quantity in Model Sound Power Level (dBA) Scenario 1 Screener 1 111 . 7 Lw/Unit Screener Operation Scenario 2 Shredder 1 109 . 9 Lw/Unit Shredder Operation Shredder Engine 1 100 . 0 Lw/Unit Blower of KiLN 10 923 Lw/Unit Scenario 3 Exhaust of KILN 10 97 .0 Lw/Unit Pyrolysis Process MQ Power 45 Unit 1 86 . 1 Lw/Unit MQ Power 45 Unit 1 93 . 8 Lw/Unit E�aust The noise modeling includes a berm along the north side of the site as shown in Figure 4- 1 . 4. 2 Noise Sensitive Receptors The noise levels were assessed at adjacent and nearby properties . Figure 4-3 shows the locations of Receptor 1 through Receptor 8 . Operational Noise Modeling Behrens and Associates , Inc . ` , '� Erzvironmental Nozse Corzti•ol �' `�° �" 1L�{U, ti'.� �°�, "" � - '. -- , - - .net. ' � 1� A :. , • ' �Y6{ ` 4 . ,� �� '� � .� ' �l`� � � M i � � � h� 4. #�.' i. . . . . ♦4 ' ' S .. � a � . M ` I � � Y � - ' • � ' 1�'a . w • �� ; t I . _� � i Y � � . .ff� � �^� . - n . . . � ' �. �� ;. `�+�` i ; . � * ,. , ;_. � , • � r e� :��'',e��,� '� �` . `:�''' _ '�d -` ,� �ti,�V- 1 ; .'�9� . " " . _ i, = V. i4�I� . t : :� . -.� ,S _ � _ ��,� � . � � , " •- ,''� i � rr� � _ �S }� , .. 1;501� , ��- -� -- - � - - - T - - -� , �.,��3�3 .� .. . � . >. . � � I ` . , ,� , � 14�52 " « 1d'19 ? '�'"�� ` 144 i 2 , 1 �i -r : I I � . _ - -,i'a - --.. ...s � . . .f . `. . � . � `18,78' , t §A"s , � , i I - ,�� :,� �-_' ' , _ ��G. � � 369 . �. +r - , � - .+r:ll �� f - � .a ^ , . 1�869 _ �"-� r . _ ._,. • �� _ , :;,- � > � +'� ^• - � \ ��. . R � . Y �: �- � �.u� ' � . �� . rJ� F ��f_ � � _ T � . �� N�. fi �F ` ` 2_ � ' � . . . ' . . , .� � : i � ��. �� .�—� � _ r; . . _ .. _e ,�I , � J � �. _ L� � � . �� ,�y�� . �= - . _ � ' ��..�. � �'..�1R�� : �-, — ,.�— .F�s i- - '�, - � �. �r , r s : "^ �',�.— �,_'�� 14�ti�'t . . . ' - �. .._ - � .. . ,. _ �714� '- ' ;�/ � , _ � � _ . ; ,; l.` �� i i; � �, - �� r + �-�; ` � -0 _� � �� i l��'I � . . . - _ . . ' �' � ` � �. - f_� •�` �� , �IN We� rir �I��' � A�� i i� . , � _ — . � . � . � . i � ❑ � I � � ` LL � '. / � � � �� . � � � .. : � c \Si��' � � . . � . �f .i � ' .t 0 ,/ �f J + , 7 : �i �a . � ' yy! ; ' _ � �' � ' ' � 1 ' ' , , 'r`- - . r - � �111 � I . iC - R �- . � - � �/. ' , t �� . '- 4 l , i (` -r � � � . _ . - . � �/, - _ � � - �1 L - I y�A"� X, II' ', ' f� . . _ � ' � �i� � �f ` - :e•�f•�ylr'� � �' ,` ��•rJl ��J � �lii Figure 4-3 Receptor Locations Operational Noise Modeling Behrens and Associates , Inc . Erzvironmental Nozse Corzti•ol �' `�° �" 4. 3 Noise Modeling Results The operational noise modeling is based off the provided proposed facility operational plans . The results of the unmitigated operational noise modeling are presented in Table 4-3 . The locations in the table correspond to the locations identified in Figure 4-3 . The predicted noise levels represent only the contribution of the project operations and do not include ambient noise or noise from other facilities . The results of the unmitigated noise modeling indicate that the Shredder Operation (Scenario 2) is predicted to comply with the noise limit of 55 dBA. However, the Screener Operation (Scenario 1 ) is predicted to exceed the noise limits of 55 dBA by up to 1 .3 dB at Receptor 06 and the Pyrolysis Process (Scenario 3) is predicted to exceed the noise limits of 55 dBA by up to 1 . 7 dB at Receptor 06 . Table 4-3 A-Weighted Unmitigated Noise Modeling Results (dBA) Receptor Scenario 1 Scenario 2 Scenario 3 (A Screener) (A Shredder) (Pyrolysis Process) 01 49 .7 47 . 8 44 . 3 02 46 . 0 42 . 3 42 .4 03 45 .4 42 . 1 43 .0 04 53 . 5 48 . 6 50 . 3 0S 42 . 8 42 . 9 43 .0 06 56 . 3 53 . 5 56 . 7 07 51 .4 46 . 2 45 . 6 08 55 . 2 50 . 9 47 . 1 Noise Limit 55 Figure 4-4, Figure 4-5 and Figure 4-6 show resulting noise contour map in dBA. The noise contours are provided in 5 dB increments with the color scale indicating the sound level of each contour. Operational Noise Modeling Behrens and Associates , Inc . 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Y . •�3� - 'Zv+i�� . } Figure 4-4 Scenario 1 — Unmitigated Facility Operational Noise Contour Map (dBA) Operational Noise Modeling Behrens and Associates , Inc . � Erzvzroramer�tal Nozse Co�trol ' ,�' �` � '� Y. � '�j� • � � � ° � � Noise Level , dBA r ��-•..`� . • �. � . i �\ , � • ':�d ' � �� -' <= � a �; ,�t t>�-0 ; , , � _ , �- � , : �o - s � . , _ ' . �• r r � _ � ,,,., ,I � _ 35 - 40 i ' ��- , - � :��c�' . . ° � � ^�: +� ; � � - 40 - 45 � , x. .� . � � . • - :v 'w. � �N y .. y � � � -� 45 - 50 �_ _ . . . r � �t:�1� /dt� i a . - _• � . . 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F � � ` n ^ —. . . . ' � , � / •� �. . � • . . . i �Y ( .�. • • � � A— r � • ,� . l^': � � / SY� �� ✓ � �� 4 ' r . . . � . ir . ,. . � � � R ; J n i . � I . � fi �. c ' ' . r l� , : . � � ' • ! . _ ' . - • � L � , , I � � .. �� ` . o � . _ � � �, � �� r '� � � ' 0 200 400 6�0 - . '� t[t - ' r" ' �� ` ' ': ��. �—� feet i..� , , - . . ��i . • � 4�; �..�� .� , +� � � � ` � N � i . _ � � 1' _1 -;.�:"�P! ia.�r.... 1,'_ � ' _-. . "� � f � _ _ , � Figure 4-5 Scenario 2 — Unmitigated Facility Operational Noise Contour Map (dBA) Operational Noise Modeling Behrens and Associates , Inc . � Erzvzroramer�tal Nozse Co�trol ' ,�' �` � � ,, , '�t, � ° ; � Noise Level , dBA ,�� . � ��. �,::. , _ � ;r � ' . g ,h�i� ''� 7� � '� _ <= 3 � : �� - � 1:, , -- , � � �� - � J . ' � ° �:, . ,.� " � ' 35 4 (} � ; � __ - :.1. � ♦ . 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Figure 4-6 Scenario 3 — Unmitigated Facility Operational Noise Contour Map (dBA) Operational Noise Modeling Behrens and Associates , Inc . , Erzvironmental Nozse Corzti•ol �' `�° �" 4.4 Noise Modeling Results - Mitigated Based on the unmitigated noise model of each scenario, mitigation measures were developed and added to the noise modeling. The modeled noise mitigation options for Scenario 1 (Figure 4-7) and Scenario 3 (Figure 4-8) are shown below. The modeled mitigation has a minimum STC value 25 and an NRC of . 55 . _. . _ .. _ _ f G�IV1r'ERSI�JhI Fa"�GILI'Y �ti, � �, , ` - � _ �i i - � ` �' � ti _ .. . . .. .. ..d . '' � i - � � n.. �s� � � _ � . Iv � �J ' � ��V �- i'I y � I �I I F1 y _ _ b � _ � _�� .10 i.4�� ; .", ,�,' �' .',' NEA45 E�3IJIPME � = • ' _ '- � - • ' � = co.., ' CpDI �� ' • _ ' r"' � ' ' . SJd�� TfX � . � .'. • :�'. J, • � . � f3YFK:�NGB � • 1 ' . � c_-'-- � . � . —. '�P -� '_' ' - . c '.�l ' � � fvP . .�p�G.G,�]' ; . � • 1"J _ _ _ _ _ ' ^. �—— h � GF'ER4i±�#!5 '+AFG '�` `� r} ��;'.� � 'k'i � (ia� fOi �a�w ,� �� r�. ,�. n � f �'-� �,� � � 1 —� r9� � � i ❑ . t.� J � ' 1 � - . - - 0 f,-- — — - , . — -- — � , � I _�� . _ _ ! � �•� _ :i - - - 4 Y .LL: C.-:�1 �. dtiry{ :P4 . Figure 4-7 Scenario 1 — Mitigation Location . _ .er,a� ,. � . �',CJN�r'ERSIDN FACILJ'Y ' ti'� .. . _ ..:: . � '. .. . '� . '`I � I ' I . . . _. . .. . . _ _. . . _ . .. . .. .. _ . �-�N-�, � 0000 t,, , �s� � ii 1, � __ I�— i . - �I��s t u I _�` � � �— — � � 4 � � y —� _a i �—a a � a- � i3 1 — — '"^`, ��.'..10 �ral�. '- �_�.^ _'L' �' . � '_ IiGNlYE''.�UIPMEhT. FIAT3E6'eRd.LEN. �j I ,� � O ' ' . � . Pd�t6zENDlCuA7Ql, f{}��fl.iFf O `�. " . '. �1'j . ' . �EW.?� ifI,TNSfHAII.F�1 � N �-�_L ��,. � . i , : w ' � • � . � fM'.F%�'!� d °,i�7PhGEbF:d. � ' ; ', '- " = �� ; , , . . . " � . . . ,. . _ ._ ; 7 . f�,�� . � .� �.d-q = . � - - - - - - - � z - � T TkJiTAN5 �'ARL� `�` sk`_;} . �l r.�, IAI.� r`=l � �'...� ,-� . '} 4' �/ � y( �. ♦ r ' � � 1 `il ��.1 �'V•`�� ' 1�� y • • �`_� �} � � � � � � � 1 � � �li� �J �i�l �� 1 � �S � �`5 � f �. � / l~ � I � � I �:nwM.+sr�ain_ srxKa�� . I I � 8 �'d'lERALSf0R4GE &A s 1 � . ' � '. `. , � 1 � . ' " I . �. � - - - . a� ,� ,�. Figure 4-8 Scenario 3 — Mitigation Location Operational Noise Modeling Behrens and Associates , Inc . Erzvironmental Nozse Corzti•ol �' `�° �" .; The results of the mitigated noise modeling indicate that Screener Operation (Scenario 1 ) and KILN & Generator Operation (Scenario 3 ) are predicted to comply with the noise limits of 55 dBA at all receptors . Table 4-4 Mitigated Predicted Noise Levels (dBA) — Scenario 1 (A Screener) Rece tor Unmiti ated Miti ated 01 49 . 7 50 . 9 02 46 . 0 46 . 8 03 45 .4 46 . 8 04 53 . 5 54 . 1 0S 42 . 8 40 . 9 06 56 . 3 44 . 0 07 51 .4 45 . 9 08 55 . 2 48 . 1 Noise Limit 55 Table 4-5 Miti ated Predicted Noise Levels (dBA) — Scenario 3 (P rol sis Process) Rece tor Unmiti ated Miti ated 0 1 44 . 3 44 . 3 02 42 .4 42 .4 03 43 . 0 43 . 0 04 50 . 3 50 . 3 0S 43 . 0 41 . 9 06 56 . 7 54 . 1 07 45 . 6 44 . 5 08 47 . 1 47 . 1 Noise Limit 55 The predicted noise levels represent only the contribution of the project operations and do not include ambient noise or noise from other facilities . Figure 4-9 and Figure 4- 10 show the resulting noise contour map in dBA. The noise contours are provided in 5 dB increments with the color scale indicating the sound level of each contour. Operational Noise Modeling Behrens and Associates , Inc . � Erzvzroramer�tal Nozse Co�trol ' ,�' �` � � . _ — - � � � � ' , � • N L BA �. : � � ,� � oise evel , d � , �, . ' ^ � � •rd � d , 3 ' . A „_ : _ �� . �! ;�',�� ' �•�i .'y'i k ; ' �— . � �� ''� t. � - � ; �� - � J � . I - f_t� ' M / 'd 1 ' r . � , - " '� i + ' " � " �i � � � � 35 - 4 (} � �C �� T �. r_, ,-�';rr. � ' , �y 1 . _ _ , - 40 - 45 . . � `; � :S_ _. � . . � . �, � � �, , . � „ 45 - � a .` l� ' ` : . �� -'' - � ' - '+ F �„ �.�. � � . •" 50 - 55 ��T�, � �' ,: � � t �� , . , , � �. e � Tj �`. s �JJ� - 6a . , , . f, r _ , � - E � ALqFu1CV � � �� . y/��./, �1 {/�� qr � �:f , .. _ , . _cnu+�z_ 42 - ... . w ,� , V V V V ' _ _ � �: . . __ _ _.. �` n _ . _ . . e _ — _ . � �� I�� F�I+��rJ .�. fJ5 ' 7U i � 1 . . �� ' � � . 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Y. � J 1 I , �� r r � • ' i� �• -��. . � � • �• 0 LQ� Y0� VQQ � , , 'r�'j _ ' r�' , ` �' �—� feet . . ir , ., . � . . , � �! % ^ h..—r . . . ._ � . .�;' � � � . . r.:t;�":;1„'_ '. � (—'�, � ` .. � _ .: � .. . . . _ _ . . � _ Figure 4-9 Scenario 1 — Mitigated Facility Operational Noise Contour Map (dBA) Operational Noise Modeling Behrens and Associates , Inc . � Erzvzroramer�tal Nozse Co�trol ' ,�' �` � � ,, �t. � � ; � Noise Level , dBA ,�� . � '`�. �,::. • �r � � �� .� „ � <= 3f� ,. . . ,. , �� _ ' ' , 3� - 35 � � , � � . . _ , � ;a ' � i .� - 35 — 4 (} ' ,. : . , . � . � . � .�,�' '` - -� �` � .�, . `_ � �� ' �- '��'�'�� . 45 - � a --- � � -= � I�r � � .�; � a.� . n . _ . . ,, ,_ . . r . . � � .. � 50 - 55 __ " , ra'�� _ ��;. ,r.-� . • � �� _— � : , �., , �� - 6a } ,. . 1 - . !' � �d � � . . 1 "=aR24 QOXIC �� -.+ N "_�r yr'I ' i /l/� /� . �� - l. 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" �b � ti��Y� -'1 �y . � - _ . �1I � _ - '� . . ---/-�-'�M� ' P}�i . � . X�-. . - . .�_�_ Figure 4-10 Scenario 3 — Mitigated Facility Operational Noise Contour Map (dBA) Operational Noise Modeling Behrens and Associates , Inc . Erzvironmental Nozse Corzti•ol �' `�° �" 5 . Conclusion A noise assessment was conducted to identify and analyze the potential noise impacts associated with facility operation associated with the proposed new site located in Weld County, Colorado . For Scenario 1 (Screener Operation) , the results of the unmitigated noise modeling indicate that the Screener Operation is predicted to exceed the noise limit of 55 dBA by up to 1 . 3 dB at Receptor 06 . With implementation of the mitigation showing in Figure 4-7 , the results of the mitigated noise modeling indicate the Screener Operation is predicted to comply with the exterior noise limits of 75 dBA at all receptors . For Scenario 2 (Shredder Operation) , the results of the unmitigated noise modeling indicate that the Shredder Operation is predicted to comply with the noise limits of 55 dBA at all receptors . Therefore, mitigation is not required for the Shredder operations . For Scenario 3 (Pyrolysis Process), the results of the unmitigated noise modeling indicate that the Pyrolysis Process is predicted to exceed the noise limit of 55 dBA by up to 1 .7 dB at Receptor 06 . With implementation of the mitigation showing in Figure 4-8 , the results of the mitigated noise modeling indicate the Pyrolysis Process is predicted to comply with the noise limits of 55 dBA at all receptors . Conclusion Behrens and Associates , Inc . " ' Erzvironmental Nozse Corzti•ol �' `�° �" Appendix A - Glossary of Acoustical Terms Glossary of Acoustical Terms Behrens and Associates , Inc . Erzvironmental Nozse Corzti•ol �' `�° �" Ambient Noise The all-encompassing noise associated with a given environment at a specified time, usually a composite of sound from many sources both near and far. Average Sound Level See Equivalent-Continuous Sound Level Ambient Noise The all-encompassing noise associated with a given environment at a specified time, usually a composite of sound from many sources both near and far. Average Sound Level See Equivalent-Continuous Sound Level A-Weighted Sound Level, dB(A) The sound level obtained by use of A-weighting. Weighting systems were developed to measure sound ina way that more closely mimics the ear' s natural sensitivity relative to frequency so that the instrument is less sensitive to noise at frequencies where the human ear is less sensitive and more sensitive at frequencies where the human ear is more sensitive . C-Weighted Sound Level, dBC The sound level obtained by use of C -weighting. Follows the frequency sensitivity of the human ear at very high noise levels . The Gweighting scale is quite flat and therefore includes much more of the low-frequency range of sounds than the A and B scales . In some jurisdictions, C -weighted sound targets are used to target the low-frequency content of noise sources . Community Noise Equivalent Level (CNEL) A 24-hour A-weighted average sound level which takes into account the fact that a given level of noise may be more or less tolerable depending on when it occurs . The CNEL measure of noise exposure weights average hourly noise levels by 5 dB for the evening hours (between 7 : 00 pm and 10 : 00 pm), and 10 dB between 10 : 00 pm and 7 : 00 am, then combines the results with the daytime levels to produce the final CNEL value . It is measured in decibels , dB . Day-Night Average Sound Level (Ldn) A measure of noise exposure level that is similar to CNEL except that there is no weighting applied to the evening hours of 7 : 00 pm to 10 : 00 pm. It is measured in decibels, dB . Daytime Average Sound Level The time-averaged A-weighted sound level measured between the hours of 7 : 00 am to 7 : 00 pm. It is measured in decibels , dB . Decibel (dB) The basic unit of ineasurement for sound level . Glossary of Acoustical Terms Behrens and Associates , Inc . Erzvironmental Nozse Corzti•ol �' `�° �" . Direct Sound Sound that reaches a given location in a direct line from the source without any reflections . Divergence The spreading of sound waves from a source in a free field, resulting in a reduction in sound pressure level with increasing distance from the source . Energy Basis This refers to the procedure of summing or averaging sound pressure levels on the basis of their squared pressures . This method involves the conversion of decibels to pressures, then performing the necessary arithmetic calculations , and finally changing the pressure back to decibels . Equivalent-Continuous Sound Level (Leq) The average sound level measured over a specified time period. It is a single -number measure of time - varying noise over a specified time period. It is the level of a steady sound that, in a stated time period and at a stated location, has the same A -Weighted sound energy as the time-varying sound. For example, a person who experiences an Leq of 60 dB (A) for a period of 10 minutes standing next to a busy street is exposed to the same amount of sound energy as if he had experienced a constant noise level of 60 dB (A) for 10 minutes rather than the time -varying traffic noise level . Fast Response A setting on the sound level meter that determines how sound levels are averaged over time. A fast sound level is always more strongly influenced by recent sounds, and less influenced by sounds occurring in the distant past, than the corresponding slow sound level . For the same non- steady sound, the maximum fast sound level is generally greater than the corresponding maximum slow sound level . Fast response is typically used to measure impact sound levels . Field Impact Insulation Class (FIIC) A single number rating similar to the impact insulation class except that the impact sound pressure levels are measured in the field. Field Sound Transmission Class (FSTC) A single number rating similar to sound transmission class except that the transmission loss values used to derive this class are measured in the field. Flanking Sound Transmission The transmission of sound from a room in which a source is located to an adjacent receiving room by paths other than through the common partition. Also, the diffraction of noise around the ends of a barrier. Frequency The number of oscillations per second of a sound wave Hourly Average Sound Level (HNL) The equivalent-continuous sound level, Leq, over a 1 -hour time period. Glossary of Acoustical Terms Behrens and Associates , Inc . , ` ° Erzvironmental Nozse Corzti•ol �' `�° �" Impact Insulation Class (IIC) A single number rating used to compare the effectiveness of floor/ceiling assemblies in providing reduction of impact-generated sound such as the sound of a person ' s walking across the upstairs floor. Impact Noise The noise that results when two objects collide . Impulse Noise Noise of a transient nature due to the sudden impulse of pressure like that created by a gunshot or balloon bursting. Insertion Loss The decrease in sound power level measured at the location of the receiver when an element (e . g. , a noise barrier) is inserted in the transmission path between the sound source and the receiver. Inverse Square Law A rule by which the sound intensity varies inversely with the square of the distance from the source . This results in a 6dB decrease in sound pressure level for each doubling of distance from the source . La Sound Level Time -varying noise environments may be expressed in terms of the noise level that is exceeded far a certain percentage of the total measurement time . These statistical noise levels are denoted L,,, where n is the percent of time . For example, the Lso is the noise level exceeded for 50°/o of the time . For a 1 -hour measurement period, the Lso would be the noise level exceeded for a cumulative period of 30 minutes in that hour. Masking The process by which the threshold of hearing for one sound is raised by the presence of another sound. Maximum Sound Level (Lmax) The greatest sound level measured on a sound level meter during a designated time interval or event . NC Curves (Noise Criterion Curves) A system for rating the noisiness of an occupied indoor space. An actual octave -band spectrum is compared with a set of standard NC curves to determine the NC level of the space . Noise Reduction The difference in sound pressure level between any two points . Noise Reduction Coefficient (NRC) A single number rating of the sound absorption properties of a material . It is the average of the sound absorption coefficients at 250, 500, 1000, and 2000 Hz, rounded to the nearest multiple of 0 . 05 . Glossary of Acoustical Terms Behrens and Associates , Inc . Erzvironmental Nozse Corzti•ol �' `�° �" Octave The frequency interval between two sounds whose frequency ratio is 2 . For example, the frequency interval between 500 Hz and 1 , 000 Hz is one octave . Octave-Band Sound Level For an octave frequency band, the sound pressure level of the sound contained within that band. One-Third Octave The frequency interval between two sounds whose frequency ratio is 2^( 1 /3 ) . For example, the frequency interval between 200 Hz and 250 Hz is one-third octave . One-Third-Octave-Band Sound Level For a one -third-octave frequency band, the sound pressure level of the sound contained within that band. Outdoor-Indoor Transmission Class (OITC) A single number rating used to compare the sound insulation properties of building fa�ade elements . This rating is designed to correlate with subjective impressions of the ability of fa�ade elements to reduce the overall loudness of ground and air transportation noise. Peak Sound Level (Lpk) The maximum instantaneous sound level during a stated time period or event. Pink Noise Noise that has approximately equal intensities at each octave or one -third-octave band. Point Source A source that radiates sound as if from a single point. RC Curves (Room Criterion Curves) A system for rating the noisiness of an occupied indoor space . An actual octave -band spectrum is compared with a set of standard RC curves to determine the RC level of the space . Real-Time Analyzer (RTA) An instrument for the determination of a sound spectrum. Receiver A person (or persons) or equipment which is affected by noise . Reflected Sound Sound that persists in an enclosed space as a result of repeated reflections or scattering. It does not include sound that travels directly from the source without reflections . Glossary of Acoustical Terms Behrens and Associates , Inc . , ` ° Erzvironmental Nozse Corzti•ol �' `�° �" Reverberation The persistence of a sound in an enclosed or partially enclosed space after the source of the sound has stopped, due to the repeated reflection of the sound waves . Room Absorption The total absorption within a room due to all objects , surfaces and air absorption within the room. It is measured in Sabins or metric Sabins . Slow Response A setting on the sound level meter that determines how measured sound levels are averaged over time . A slow sound level is more influenced by sounds occurring in the distant past that the corresponding fast sound level . Sound A physical disturbance in a medium (e . g. , air) that is capable of being detected by the human ear. Sound Absorption Coefficient A measure of the sound-absorptive property of a material . Sound Insulation The capacity of a structure or element to prevent sound from reaching a receiver room either by absorption or reflection. Sound Level Meter (SLM) An instrument used for the measurement of sound level, with a standard frequency-weighting and standard exponentially weighted time averaging. Sound Power Level A physical measure of the amount of power a sound source radiates into the surrounding air. It is measured in decibels . Sound Pressure Level A physical measure of the magnitude of a sound. It is related to the sound ' s energy. The terms sound pressure level and sound level are often used interchangeably. Sound Transmission Class (STC) A single number rating used to compare the sound insulation properties of walls , floors, ceilings, windows , or doors . This rating is designed to correlate with subjective impressions of the ability of building elements to reduce the overall loudness of speech, radio, television, and similar noise sources in offices and buildings . Source Room A room that contains a noise source or sources Glossary of Acoustical Terms Behrens and Associates , Inc . , ` ° Erzvironmental Nozse Corzti•ol �' `�° �" Spectrum The spectrum of a sound wave is a description of its resolution into components , each of different frequency and usually different amplitude . Tapping Machine A device used in rating different floor constructions against impacts . It produces a series of impacts on the floor under test, 10 times per second. Tone A sound with a distinct pitch Transmission Loss (TL) A property of a material or structure describing its ability to reduce the transmission of sound at a particular frequency from one space to another. The higher the TL value the more effective the material or structure is in reducing sound between two spaces . It is measured in decibels . White Noise Noise that has approximately equal intensities at all frequencies . Windscreen A porous covering for a microphone, designed to reduce the noise generated by the passage of wind over the microphone. Glossary of Acoustical Terms BIOCHAR PROCESSING CR 6 , LLC SCREENING PLAN M a rc h 20, 2024 It is the intention for the facility to be visually unintrusive and non -impactful to the surrounding properties and travelin � public. The Biocharfacilitywill be screened with a minimum of 8-foottall solid , opaque metalfencing with finished top rail. Fences will be painted a natural, compatible color to the surroundin � environment. Fencing will be raised approximately six-inches from grade to allow for natural drainage and small wildlife movement. Posts ( metal orwooden ) will be installed per manufacturer recommendations, likely between eight to sixteen feet apart . The draft USR map depicts the location of fencing, which may be further refined prior to approval and construction . This screeningwill also provide site security. Existin� berms will remain . Additional site securityfencingwill be installed around the proposed NGL injection well facility and may be the same metal fence type but more likely would be chain - link fencing. No vegetative landscaping is proposed . Additionally, the stockpiling of raw biomaterials, kiln line and modular building may provide indirect screening relative to the active operations yard includingtruck, equipment and transferrin � activities . Page 1 of 1 Diana Aungst From: Michael Hall < pagoda . mapping@gmail .com > Sent: Tuesday, September 9, 2025 7: 57 PM To: Diana Aungst Cc: Michael Dente; Bob Demaree/USA Subject: Re: Presentation images USR24-0019 This Message Is From an External Sender This email was sent by someone outside Weld County Government. Do not click links or open attachments unless you recognize the sender and know the content is safe . Hello Diana , We fully expect and intend to comply with the daytime and nighttime noise standard limitations , as described in the Noise Report . The screener and shredder , which generate the most relative noise , will only be operated appro;:imately one week out of a given month , during daytime hours . If mitigated per the noise report recommendations , the screener noise will not exceed 55 db . The shredder, whether unmitigated or not , is not e;:pected to e;:ceed 55 db , although the adjacent sould wall for the screener will also reduce noise of the shredder . The kiln area , referred to in the report as the pyrolysis process , does not e>:ceed 55 db . However , given this process is operating at night , the 50 db limit applies , which is why we are proposing a berm along a select area ( near receptor 6) , in addition to the sound wall in order to adequately mitigate noise . The other operational noises on site are comparatively low . For e;:ample , trucks will utilize low-tone back up indicators , the kilns themselves do not emit high - pitched or abrupt noise , the proposed sound wall located south of the kilns will reduce noise from the movement of kilns and inbound wood stockpile management and outgoingtrucks will be limited to daytime hours . Thankyou , Michael Hall On Sat , Sep 6 , 2025 at 7 : 52 PM Diana Aungst < daungst@weld . gov% wrote : Hi Michael, Thanks . I will go ahead and use some of these images in the PowerPoint . Also , are you meeting the nighttime noise restriction ? Thanks, I 1 M �� touNrx o0 i Diana Aunast, AICP � CFM Principal Planner Department of Planning Services Des k: 970 -400 -3524 P. O . Box 758 , 1402 N . 17th Avenue , Greeley, CO 80632 � � " � � Join Our T� �4, IMPORTANT: This electronic transmission and any attached documents or otherwritings are intended onlyfor the person or entity to which it is addressed and may contain information that is privileged , confidential or otherwise protected from disclosure . If you have received this communication in error, please immediately notify sender by return e - mail and destroy the communication . Any disclosure , copying, distribution or the taking of any action concerning the contents of this communication or any attachments by anyone other than the named recipient is strictly prohibited . From : Michael Hall < pa �oda . mappin � @ �mail . com > Sent : Friday, September 5 , 2025 5 : 05 : 00 PM To : Diana Aungst < daun �st@weld . �ov> Cc: Michael Dente < michael . dente@kw . com>; Bob Demaree/USA < Bob . Demaree@cushwake . com> Subject : Re : Presentation images USR24-0019 This Message Is From an External Sender This email was sent by someone outside Weld County Government. Do not click links or open attachments unless you recognize the sender and know the content is safe . Hello Diana , See below images : z . . I'y� . ` ��f, ,i hl,• �.� �� •� . . . s t , } . -, '., � � . : • ' . �� , � '� � � , . � ' r � �y - '_ • . � � . , , ti - . , . , Ii�R � r � .� y� � � . � . u t_ . �. ry I � _ ' � �.. - . � . � . a , * -'\ �� - �- � . 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' ; 9 .. �J , 4 . . .. n . � � . . I �. �. S i ,'� w� . � . `'- � - , . �1 ,� . �.Ay `:; ' . 'V -. i ♦ � \ � � ��' :�'�f 1 � a `� j � . �'. ` ' ' i . � . �( e/ ' i �.� lAl � ' / . . 1 . i . -. y'}� � � �� _ � '=' �. 1 � � i. � C � .. . - - 9 � �a�� rs • . � � � � - f f l !/ M1 1' .- I .I I �� . r� 4 ��' ' ' �� r- .. . . .. L \ � � •.'� � . � ♦ .i . 1 . Shredder close up being loaded by an e><cavator I F�►F��I-T�L��I � � �L�I� I"��f� � IE� I�J� ��Y� - a � � _'�= � � ` _ _ � � r ' ' , _ ., � �,__ , _ � - � , 5 Proposed opaque fencing - 8 ' tall � � ��. ° �: � Y , �� , — I •, �� i — i 11 .� �Y • �W ��( _, , '$. _ . _ . > ,��4� ' '�'i� � ld_ ' �R . ' ' .. . _ _ � _1r. : . �LLt,� . . ' � � �y � — _ _ _— ��- . . , . '� �' � ', _ �. .f�v I 1. _ i � �� 'W 1 x7 '�- � J l� � • - '�_ � I I I 1 � .' II _ �G�- 1 . 5 . . _ � _ � � j- • � � Sound walls to be at select locations on site , adjacent to shredder � screener , as depicted on the location recommendations in the Noise Study ( page 13) . In general, the walls will be 12-ft high adjacent to the screener and shredder and 20 -ft high adjacent to the active kiln line . However , given the kilns have a very low noise level, we may opt to lower those to 12-ft , to reduce the visual impact , as long as we can demonstrate compliance with the noise limits . Additionally, we are planning on an approximately 500-ft long, 8-ft tall earthen berm along the eastern aspect of the site , to offer a more natural screening method for the adjacent property owner , Mr . Tony Hale . In email conversations with him , this appeared to be the preferred approach . We also are planning on a separate 500-ft long, 8 -ft tall earthen berm along the southern property line , adjacent to Ms . Jeri Yarbrough ' s property, near that part of her propertywith built improvements , in order to reduce impacts and provide a natural barrier . Given the 8-ft anticipated height at a roughly 3 : 1 slope angle , each berm will be appro>cimately 50¢ -ft wide and will be established with a recommended native grass and vegetation mix and kept free from noxious weeds . See below image of the approximate e;ctent of this berming . All other areas will be screened with the above-described metal fence . Note , this fence is not a property perimeter fence , but will be around the facility, to reduce the visual e;:tent as much as possible . We are also planning on reducing stockpile height to limit the visual nuisance and viewshed concerns . 6 . � � � : . � ,�+. ' - _ . - �- � �+ - _ . - ' - -- � — - - - � • - _ � . _ , _ � r, � ' � � � �. . � � , , c. � , .. < .. , _ - ^ . . ; �. � .� - , _ , � - - � ' . � � � � f� . ^:: . . . . � �, _ .s , , , . � y � r' �.J '�' +� � .i � 1 T � y . . � I� ' _ �f . L .- - 1 i , . •f i� — � �• . ' y�.,. � � , � .. � . �.�i !.'� _ ... ,a. -'_ _. !. . F � .. - , a. �'._ -. • ' �.�-'� ..r o� � . - - ' . �` � ,f � _ ' Y . � . - �'1F-_ . > . - 9Y�Fi �i p� f ' 1 ' � � " - �� '� � 'I x�- I � � . - -. � ,- �; � I �oSal dcngkli : 50CY. 1fl #t~ � ".- , .� � . � ' y — '7 . - � . : �' � .. = i �� - � . cT�atal�Icr � tl�:,�,Od:£5_F,t� � � � 9 • _ rt � '� - - -- - - - - _ - - - , � - - �- - - - __ _ ;� � w - : � . , _ .,� _ . ,s - - '�-� � - - - , �_ - • ,_ " � i :;. � I , � _ � � . 1 _ '�w �. :s � 'I' � ' � i � �-�! �`2 �� -_ �-F ' z" ' � �� - w . �. � - - �' I: . �-- _' � , _ . , • � i . � f . , _ _ � �- - � � - �� . �� .vV . � , 1� � � �y�� .y^� � r�� .r � � f � 'Y � _.r � f� / .M ��•. . 4._ aa� f � . .�- . � . ' �' u � �W � Thankyou , Michael Hall On Mon , Aug 11 , 2025 at 1 : 36 PM Diana Aungst < daungst@weld . gov> wrote : Hi Could you please send me images of the items that will be on site . Specially, trucks , shredder , screener, sound walls � screening . Thanks, � � � �� Diana Aungst, AICP � CFM Principal Planner Department of PlanningServices Des k: 970 -400 -3524 P . O . Box 758 , 1402 N . 17th Avenue , Greeley, CO 80632 � � � � � Q Joir� C) ur Tearr� ..�__�.�� IIWPORTANT: This electronic transmission and any attached documents or otherwritings are intended onlyfor the person or entity to which it is addressed and may contain information that is privileged , confidential or otherwise protected from disclosure . If you have received this communication in error, please immediately notify sender by return e - mail and destroy the communication . Any disclosure , copying, distribution or the taking of any action concerning the contents of this communication or any attachments by anyone other than the named recipient is strictly prohibited . s Diana Aungst From: Michael Hall < pagoda . mapping@gmail .com > Sent: Friday, August 22, 2025 7 :01 PM To: Diana Aungst Subject: Re: Biochar USR24-0019 traffic This Message Is From an External Sender This email was sent by someone outside Weld County Government. Do not click links or open attachments unless you recognize the sender and know the content is safe . Diana , I confirmed with Biochar . . . There will be 4 employees per shift , 3 shifts per day . Total daily employee round trips would then be 12 . This is the anticipated shift breakdown : Shift St� rt End Shift 1 6 : � �I i � l7 �} Shift 2 1' �-: f� d� �� : (� � � hift 3 22 : � s� 6 : f10 Thankyou , Michael Hall On Wed , Aug 20 , 2025 at 6 : 28 PM Diana Aungst < daungst@weld . gov> wrote : Hi Michael : The application materials state 3 shifts with 4 employees each and the traffic narrative states that there will be eight (8 ) passenger cars per day with the concentration of traffic occurring at shift change 6 : 00 a . m . and 6 : 00 p . m . each day . — Which of these are correct? Thanks , � , c��, Diana Aunast, AICP � CFM Principal Planner i Department of Planning Services Desk: 970 -400 -3524 P . O . Box 758 , 1402 N . 17th Avenue , Greeley, CO 80632 � � � � � J�I�n Our T+�a�ym�� "s:��a �.�s��:.�_�aFaii„ IMPORTANT: This electronic transmission and any attached documents or other writings are intended only for the person or entity to which it is addressed and may contain information that is privileged, confidential or otherwise protected from disclosure . If you have received this communication in error, please immediately notify sender by return e- mail and destroy the communication . Any disclosure , copying, distribution or the taking of any action concerning the contents of this communication or any attachments by anyone other than the named recipient is strictly prohibited. 2 BIOCHAR PROCESSING CR 6 , LLC TRAFFIC NARRATIVE M a rc h 20, 2024 Per the Pre -application minutes, as provided by email, dated November 9, 2023, Development Review staff requires the submittal of a Traffic Narrative as detailed in the PreliminaryTraffic ImpactAnalysis Section of the Development Review pre -application packet. 1 . Describe how many roundtrips/day are expected for each vehicle type : Passenger Cars/Pickups, Tandem Trucks, Semi -Truck/Trailer/RV ( Roundtrip = One ( 1 ) trip in and One ( 1 ) trip out of site) . RESPONSE : Passenger Cars/Pickups : 8 per day, daily. Inbound/outbound at 6 : 00am and 6 : 00pm during shift change Tandem Trucks : 12 per day Monday — Friday; between the hours of 8 : 00am - 5 : 00pm Semi -Truck/Trailer: 3 per day Monday — Friday; between the hours of 8 : 00am - 5 : 00pm 2. Describe the expected travel routes or haul routes for site traffic . RESPONSE : Expected Route of inbound and outbound material trucks is west on CR 6, and north or south on US Highway 85 . Inbound material will come from the Vestas Brighton facility, as well as the Tower landfill. Outbound materialwill be transported directlyto the Biochar Berthoud facilityvia l -25 . 3 . Describe the travel distribution along the routes (e . g. 50% of traffic will come from the north , 20% from the south , 30% from the east, etc. ) . RESI�ONSE : All inbound and outbound traffic will arrive and depart from the site to the West on CR 6 . 50% of inbound material will come from the Vestas Bri� hton facility (West) and 50% will come from the Tower landfill (South ) . 100% of the outbound materialwill be sent to Biochar [3erthoud ( North ) . 4. Describe the time of day that you expect the highest traffic volumes. RESPONSE : The highest traffic volume will be from 10 : 00am - 2 : 00pm when inbound tandem trucks and outbound semi -truck/trailer will likely be crossin � paths. Page 1 of 1 BIOCHAR PROCESSING CR 6 , LLC WASTE HANDLING PLAN M a rc h 20, 2024 Overview Given the purpose of this facility is to convert nonmerchantable wooden biomaterial into a usable product, material and waste handling is a paramount consideration in operating the site. All incoming biomaterials will be stored in an or�anized , safe and standard manner, priorto processing . Althou �h the incomin � raw materials are typically sourced from other industrial users, such as pallets, timber and scrap wood , there are no express need to protect the biomaterials from impacting other properties, as the heavy, solid and stable materials will not blow onto other properties, degrade into any negative components, leach chemicals, or otherwise produce by- product waste streams that are not already accounted for in the processing of such raw materials. Described below are several other waste streams and waste related topics . Part 1 All recoverable solid waste streams, being primarily scrap metal, will be separated as part of the screening process of the raw biomaterials . On a monthly basis, it is expected that approximately 10 cubic yard of inetal scrap will be removed from biomaterials and will be captured in containers to be transported off-site . Metals will be recycled at an unaffiliated metal recycling facility. No processing besides biomaterial conversion will occur at this facility. Pa rt 2 All other non -value, scrap, refuse, trash , debris and waste streams from operations will be collected and appropriately stored in third - party owned receptacles, typically within 3-yard roll- off dumpsters . Employee trash will be collected and disposed of in the same, combined waste stream as process wastes. Biochar will enter into a contractual arrangement with a waste management company upon the time the facility is approved and priorto construction . Dumpsterswill be retrieved bythewaste providervia truckto betransported off-site for landfill disposal, on a weekly basis . No waste streams are expected to remain on -site, and no processing or long-term storage of solid wastes will occur. No produced waste streams are expected to attract pests, �enerate odors or create contamination concerns. Pa rt 3 Although not expected , any spill, harmful waste stream or those wastes with a potential to impact the community or environmentwill be appropriately reported , contained , managed and remediated in accordance with best mana �ement practices, SDS terms and government re�ulations . Pa rt 4 No liquid waste will be �enerated by this operation , beyond those which may be accepted by a septic system , such as sanitarywaste . See SEPTIC PLAN . Page 1 of 1 BIOCHAR PROCESSING CR 6, LLC SEPTIC PLAN M a rc h 20,2024 Under the current scope of operations, one modular office buildin�will be installed on-site.This buildin�will be utilized for office space for employees and will contain one standard restroom.Awaterwell is proposed to be drilled on-site to provide water needs for the restroom. Given this proposed setup, a commercial on-site wastewater treatment system will be en�ineered, desi�ned, permitted and constructed on site, in order to capture wastewater from the restroom. No other liquid waste will be diverted to the OWTS. The septic system will be inspected and pumped by a local septic cleanin� company,as needed. No public sanitary sewer systems are available for connection in the area. Pa�e 1 of 1 Hello