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Home My WebLink About20180838.tiff;motiebst ._totpoef, USE BY SPECIAL REVIEW (USR) APPLICATION DEPARTMENT OF PLANNING SERVICE * 1555 N. 17TH AVENUE * GREELEY, CO 80631 w. eidgov1corn * 970-353-6100 EXT 3540 * FAX 970-304-6498 FOR PLANNING_ DEPARTMENT USE: AMOUNT $ APPLICATION RECEIVED BY DATE RECEIVED: CASE # ASSIGNED: PLANNER ASSIGNED: Parcel Number*: 1 2 1 3 5 4. 0 0_ 0 1 6 Address of site° Legal Description: EI/2 825 103N R65W 6TH PM (*A 12 digit number on Tax I . information, obtainable at w w w ..w SIdow.corn). Section: 25 Township: 03N N Range: 65WW Zone District: 13 Acreage. 44.51 Flood,plain:OYON Geological Hazard:0Y O Airport O rlay:0Y FEE OWNER SIOF THE PROPERTY: Name: Lilo White Company: Discovery Midstream Partners Phone #: 720-378-6592 Street Address: 4041 Bruin Blvd, Unit #3 Email: Zito@disccveryrnidsiream.com City/State/Zp Code: Frederick, CO 80504 Name: Company: Phone #: Street Address: Email: City/State/Zip Code: Name. Company: Phone #: Email: Street Address: CitylState/ap Code: APPLICANT OR AUTHORIZED AGENT: (See below: Authorization must accorrpanyall applications signed b yAuthorized Agents) Name: Chris Morrison Company: PSI Phone #: 719-424-4021 Email: cmorrison@psi-I1c.com Street Address: 110 S. Sierra Madre St City/State/Zip Code: Colorado Springs, Co 80903 PROPOSED USE: Crude Oil Storage (vie) hereby Depose and state under penalties of perjury that all statements, proposals, and/or plans SU3Illitt-emit r contained within the application are true and correct to the bostof my (our)knowledge. Signatures of all fee owners of property rnustsign this application If an Authorized Agent signs, a letter of authorization from all fee owners must be included with the application. If a corporation is the fee owner, notarized evidence must be included indicating that the signatory has to legal authority to sign for the corporation. Z._ iespas)474,---- ellAIA ?re Signature: Owner or Authorized Agent Date Signature: Owner or Authorized Agent Date Lito White Chris Morrison Print Name Print Name Rev 412016 DEPARTMENT OF PLANNING SERVICES 1555 N 17th AVE GREELEY, Co 80631 PHONE: (9711) 353-6100, Ext. 3540 FAX: (97Q) 304-6498 AUTHORIZATION FORM I PSI represent Discovery Midstream (Agent/Applicant) (Owner) located at WCR 30 and WCR 49 for the property LEGAL DESCRIPTION SEC 25 SUBDIVISION NAME: I can be contacted at the following JTWN. 3N RNG 65W LOT _ BLK Home Work 719-424-4021 Email: CMorrison@psi.Ilc.com The property owner can be contacted at the following Home Work rk 7120-717-9808 17.9808 Email: lito@discoverymidstrearn.com Corre6pondende ernailed to: (Check one) DATE ?/'-f let" OWNER'S SIGNATURE C.-• C-0) Ei Agent/Applicant � Property Owner OFFICE OF THE SECRETARY OF STATE OF THE STATE OF COLORADO CERTIFICATE OF FACT OF GOOD STANDING I, Wayne W. Williams, as the Secretary of State of the State of Colorado, hereby certify that, according to the records of this office, PIPELINE STRATEGIES AND INTEGRITY, L.L.C. is a Limited Liability Company formed or registered on 09/07/2001 under the law of Colorado, has complied %vith all applicable requirements of this office, and is in good standing with this ofrfice. This entity has been assigned entity identification number 20011175326 . This certificate reflects facts established or disclosed by documents delivered to this office on paper through 07/26/2017 that have been posted, and by documents delivered to this office electronically through 07/27/2017 @ 13:21:43 I have affixed hereto the Great Seal of the State of Colorado and duly generated, executed, and issued this official certificate at Denver, Colorado on 07/27/2017 @, 13:21:43 in accordance with applicable law. This certificate is assigned Confirmation Number 10364253 Seerei:ary or State of ilac State of Coloi ado ***************.******************************End of Certifiea.te******************************************* Voila '> critical(' a c all eAi` 14?w i/rr = vii ruin Seca- - of Stair's Web ..i'it Lc try!' an tr t,&PilrareI4'' valid mid di "tl ►�e Jimvever, as an option, the issuance and validity of a certificate obtained electronically may be established by visiting the Validate a Certificate page of the Secretary of State's Web site, lrttp: //wis'w sos.st ate cry us/hit/Cedi}ica teSearch .'titers do entering the certificate's confirmation number displayed on the certificate, and following the instructions displayed. • onfir'rsnn_ r rise -iirunt'e of a irertuJrr1 frjjnerr*: sill rao i4 iw: _lleces&on. rta :1w vaitd anaa rfiesc.tivr hymnals of it eagf li i ir; For more information, visit our Web site, http:l/ 4a ii' sos_state toms/ click "Businesses, tradetnarks, trade names" and select "Frequently Asked Questions." DISC 0 VERY MIDSTREAM PAR T'NERS Planning Questions: I. Explain, in detail., the proposed use of the property: USR QUESTIONNAIRE Response: The proposed site will be used for crude oil storage. The site is approximately 50 acres and is comprised of several parcels of land currently owned by Wes Moser Inc. The property will be leased for the duration of this installation, The site will be accessed from the north via Weld County Road 30. There is an existing access to a separate facility and the road will be extended to the north western border of the new parcel. A tank farm will be constructed to store stable crude before delivery to the White Cliffs facility to the north. Three (3) 1OOOO0 barrel tanks and two (2) 250,000 barrel tanks will be installed on the site, outside of the flood plain. The tanks will be constructed within a dirt berm containment area complying with NFPA and federal regulations. A pipeline connection will be on -site for receiving crude from the gathering system and discharging crude to a downstream terminal. The operation and control of the terminal will be conducted from a building that will be constructed adjacent to the tank containment area. This building will consist of a workshop/warehouse for spare part storage and maintenance. There will also be an office area with a kitchen and break room. A separate Use by Special Review application will be submitted to Weld County for the adjacent pipeline. A Subdivision Exemption (SE) permit will be submit along with this USR permit. 2. Explain how this proposal is consistent with the intent of the Weld County Code, Chapter 22 of the Comprehensive Man: Response: Section 22-2-10(D) of the Weld County Code states that "extraction of natural resources is an important part of the economy of the County," The proposed oil storage terminal will contribute to the expansion of the county's industrial economic base by providing increased capacity for future marketing of oil and gas production in Weld County, Section 22-2-80(C) states that "The land use applicant should demonstrate that the roadway facilities associated with the proposed industrial development are adequate in width, classification and structural capacity to serve the development proposal!' The attached Traffic Memo indicates that the new development proposal will not impact traffic in such a way as to conflict with current transportation infrastructure. The facility will comply with all federal, state, and local policies and legislation per Section 22-2-80(E). Per Chapter 22, oil and gas storage facilities are allowed as a use by right in the A (Agricultural) Zone District. However, oil and gas storage facilities, oil and gas support, and associated services require a Use by Special Review (USR) permit in Weld County, 3. Explain how this proposal is consistent with the intent of the Weld County Code, Chapter 23 (Zoning) and the zone district in which it is located: Response; Section 23-3-10 indicates that uses that are "more intense and have a potentially greater impact" are permitted within the A (Agricultural) Zone District, The operation of an oil storage facility, while minimally intrusive, is more suited for less densely populated areas such as the proposed site, In addition, the parcel currently has oil and gas production and other oil and gas infrastructure within close proximity. Section 23-3-40 also indicates that oil and gas storage facilities are acceptable as a Use by Special Review within the district. DISC 0 VERY MIDSTREAM PARTNERS USR QUESTIONNAIRE 4. Describe what type of land uses surround the site. Explain how the proposed use is consistent and compatible with surrounding land uses. Response: The surrounding land usage for the site in question is primarily agriculture. The new terminal will not interfere with agricultural production. The terminal will be regulated and compliant with environmental code as to not affect drainage into surrounding areas. 5. What are the hours and days of operation? Response: The terminal will be in operation for twenty-four (24) hours a day, seven (7) days a week. 6. List the number of full time and/or part time employees proposed to work at this site: Response: The terminal will have two (2) part time employees. There will be no full time employees, 7. If shift work is proposed, include the number of employees per shift: Response: Shift work will not be employed at this site. List the number of people who will use this site. Include contractors, truck drivers, customers, volunteers, etc.: Response: Contractors will be used on the site for initial construction and occasional maintenance. During these periods, there will be approximately ten (10) additional workers on site. The facility will have minimal throughput during hours of operation. An expected two (2) part time employees will use the site throughout the week to ensure proper operation of the facility. 9. If this is a dairy, livestock confinement operation, kennel, etc,, list the number and type of animals: Response: No animals will be onsite. 10. Describe the type of lot surface and the square footage of each type. (e.g. asphalt, gravel, landscaping, dirt, grass, buildings): Response: Area of Undeveloped/Agricultural Area of Gravel Area of Roof/Building 39,83 acres 0S8 acres 3,69 acres 11. How many parking spaces are proposed? How many handicapped (ADA) parking spaces are proposed? Response; The only parking on site will be area parking around the operations building, No allocated parking spots will be designated for handicap or otherwise, 12. Explain the existing and proposed landscaping for the site; DISC VERY MIDSTREAM PARTNERS USR QUESTIONNAIRE Response: The existing site is an agricultural field. The field will be landscaped and graded to accommodate the new storage tanks. The tanks will be constructed inside a dike containment area compliant with 40 CFR 264,193. Inside the containment area will not be graveled but will be sloped away from the tanks to the berm toe. Inter -site roadways will be gravel. 13. Describe the type of fence proposed for the site (e.g. 6 foot chain link with earth tone slats): Response: A six (6) foot chain link fence will be constructed around the property borders. A single vehicle gate will be constructed in -The with the fence at the access point to monitor entry/exit to the terminal. Adjacent to the vehicle gate will be a man gate for emergency egress, 14. Describe the proposed screening for all parking and outdoor storage areas: Response: No screening will be implemented at this facility. 15. Explain any proposed reclamation procedures when termination of the Use by Special Review activity occurs: Response: Upon termination of the Use by Special Review, the facility and the proposed development area will be returned to its original state. All equipment, grading, and structures will be evaluated at that time for demolition and reclamation. 16. Who will provide fire protection to the site? ; Response: Fire protection to be provided by Southeast Weld Fire Protection District. 17. List ail proposed on -site and off -site improvements associated with the use (e.g. landscaping, fencing, buildings, drainage, turn lanes, etc) and a timeline of when you will have each one of the improvements completed: Response: New on -site improvements with completion dates will be as follows: a. Site grading — July 2018 b. New Gravel Roadways —July 2018 c. Fencing —July 2018 d. Area lighting —July 2018 e. Operations building/warehouse — December 2018 f. Communications building with antenna tower July 2018 g. 100,000 bbl tank July 2018 h. 2x additional 100,000 bbl tanks — May 2019 it 2x additional 250/000 bbl tanks May 2019 j. Pump station with suction/discharge manifold —July 2018 k. Sump tank -, July 2018 Engineering Questions: 1. Describe how many roan dtrrips/day are expected for each vehicle type: Passenger Cars/Pickups, Tandem Trucks, Serni- Truck/Trailer/R V (Roundtrip =1 trip in and 1 trip out of site): DISC o VERY M IDS TlEAM PARTNERS Response: Vehicle daily trips will be as follows: a. Passenger cars — 2 vehicles/day (4 trips) b. Tandem Trucks — 0 vehicles/day c. Semi -trucks — 0 vehicles/1day 2, Describe the expected travel routes for the site traffic: USR QUESTIONNAIRE Response: Site access will be through the following routes: a. Access Route 1 1. From Hudson, CO, take Interstate 76 Frontage Rd. NE ii. Turn North onto County Rd 49 iii. Go approximately 7 miles due north iv. Turn West onto County Rd 30 v. In 0.5 miles, take the access road south/ just past the White Cliffs Facility vi. The new terminal will be 0,67 miles down the access road b. Access Route 2 i. From County Rd 43, turn east onto County Rd 30 ii. Travel approximately 2 5 miles along County Rd 30, take the access road south, just past the White Cliffs Facility iii. The new terminal will be 0.67 miles down the access road 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): Response: The access routes above will distribute expected traffic 50% from Access Route 1 and 50% from Access Route 2. 4, Describe the time of day that you expect the highest traffic volumes: Response: The traffic volume will be minimal throughout working hours {7 a.m. to 7 p,m.), The estimated four (4) trips a day will occur between at 7 a.m. and at 7 p.m, 5. Describe where the access to the site is planned: Response: The site access is planned at the northwestern corner of the property line, This will tie into the access road off of County Rd 30 due north. 6. Drainage Design: Detention pond summarized in a drainage report is required unless the project falls under an exception to storrnwater detention requirements per code section 23-12-30 1.1. A. Does the site qualify for an exception to stormwater ter detention? If so, describe in a drainage narrative the following: 1. Which exception is being applied for and include supporting documentation. DISC o VERY WIIOSTr?EAM PARTNERS USR QUESTIONNAIRE 2. Where the water originates if it flows onto the property from an offsite source 3. Where it flows to as it leaves the property 4. The direction of flow across the property 5. If there have been previous drainage problems with the property Response: Per conversation with Weld County Department of Planning Services, a drainage variance request is being submitted with this USR application. The site does not fall under any of the exceptions listed in code section 23-12-30 FA 1, but based on engineering analysis, the development of this parcel of land will not increase the runoff onto the adjacent parcels. The variance report provides details to the above listed requirements. No stormwater detention pond will be constructed on site, Environmental Health Questions: 1. What is the drinking water source on the property? Response: Drinking water for the facility will be provided by commercially bottled water based on the following criteria: - The facility will have 10 or less customers or visitors per day - The facility will employ less than four (4) part time (20 hours/week) employees 2, what type of sewage disposal system is on the property? Response: There is no existing sewage disposal system on the property. Portable toilets will be used based on the following criteria: - The facility will have 10 or less customers or visitors per day - The facility will employ less than four (4) part time (20 hours/week) employees 3. If storage or warehousing is proposed, what type of items will be stored? Response: The primary purpose of the facility is for hydro -carbon storage in the on -site tankage. The storage tanks will solely be used to store non-volatile crude, The warehouse to be built on site will be used primarily as a workshop for equipment maintenance. The only items stored in this site will be spare parts including valve, instrumentation, pipe material and fittings, and other miscellaneous parts. 4. Describe where and how storage and/or stockpile of wastes, chemical, and/or petroleum will occur on this site: Response: No bulk waste products are to be expected. General trash will be gathered in dumpsters located either at the operations building, Any flammable or oily rags/debris will be disposed of in vapor safe, metal bins. 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: Response: N/A - No vehicle or equipment fuel stored on site. 6. If there will be washing of vehicles or equipment on site, indicate how the wash water will be contained: DISC o VERY 'liDSTREAM PARTNERS Response: There will be no vehicle washing facility at this facility. 7. If there will be floor drains, indicate how the fluids will be contained: Response: There will be no floor drains in the operations building. `, Indicate if there will be any air emissions (e.g. painting, oil storage, etc.): USR QUESTIONNAIRE Response: The facility will have fugitive air emissions that have been quantified in a fugitive emissionscount report. An air permit has been applied for and will be completed and approved prior to the start of any construction or site work at this location. 9. Provide a design and operations plan if applicable (e.g, composting, landfills, etc): Response: Facility operations will be conducted as follow: 1. Upstream crude will enter the parcel through the onsite pipeline. 2. After passing a pig launcher/receiver, the crude will move through an emergency shutdown valve. The valve will be designed to protect the parcel and the pipeline from hazardous material leakage in the case of corrosion or an emergency. 3. The crude will then move into the storage tanks on site and accumulate until enough volume is present to move the product to the White Cliffs facility to the north. 4. A central pumping manifold will be designed to gather product from any of the tanks and, using common pumps, discharge the product into the outlet pipeline and downstream to the White Cliffs facility. Operations will monitor product movements from the control room and be available to open and dose valves where necessary (facility operation capabilities will be local and remote). Instrumentation will be tied to the tanks, pumps, and shut down valves for remote control as well as for additional safety measures. 10. Provide a nuisance management plan if applicable; Response: Not Applicable 11. Additional information may be requested depending on type of land use requested: Response: Not Applicable Building Questions: 1. List the type, size (square footage), and number of existing and proposed structures. Show and label all existing and proposed structures on the USR drawing, Label the use of the building and the square footage. 2. Explain how the existing structures will be used for this USR. 3& List the proposed use(s) of each structure: Response: There are currently no structures on the property inquestion. A new operations facility will be installed and will be approximately SO' x 100' (5,000 square feet). This building will be used for monitoring of the storage tanks, signal gathering from local instrumentation, and area security, An office and breakroom will DISC 0 VERY MIDSTREAM PARTNERS USR QUESTIONNAIRE be installed in this building. Adjacent to the operations center (within the same building), a warehouse facility will be built. This warehouse will be used for spare part storage and maintenance of facility equipment. A second building will be constructed for the communications tower. This building will be approximately 20' x lo►' (200 square feet). The communications building will house the battery power for the tower, the power distribution for the tower and the radio equipment, the transmission equipment, and HVAC equipment. All power and instrument signals will be controlled/distributed from a third Power Distribution Center (PDC) building. This building will be approximately 20' x 20' (400 square feet). Weld County Public Works Dept. 1111 H Street P40. Box 758 Greeley, CO 80632 Phone: (970)304-5496 Fax: (970)304-6497 Applicant nt Nam Chris Morrison Company P1 Address 110 S Sierra Madre St ACCESS PERMIT APPLICATION FORM Property Owner (if different than Applicant) Name Lito White Address 4041 Bruin Blvd, unit #3 City Frederick State CO Zip 80504 Colorado SpringsCO 80903 720-378-6592 City State �p Phone 719424 Business Phone --01 Fax Fax E-mail em a rrison@psi-li c. corn Parcel Location & Sketch The access is on WCR 30 Nearest Intersection: WCR 30 & WCR49 Distance from Intersection 0 51 miles Parcel Number r leer 121325400016 Section/Township/Range S25 TO3N R65W Is there an existing access to the property YES NO Number of Existing Accesses Road Surface "Noe & Construction Information Asphalt la Gravel Treated n, Other Culvert Size & Type Materials used to construct Access Construction Start Date Finish Date Pr onoseci= fliemporary (Tracking Pad Required)/ $75 Small Commercial or Oil & Gas/$75 QField (Agriculture Only)/Exempt Is this access associated with a Planning Process? E-mail lito©discoverymidstream corn = Existing Access b►= Proposed Access t N U WCR' 0 WCR (Single Residential/$75 (Large Commercial/$150 Required Attached Documents - Traffic Control Plan -Certificate of Insurance Cr- co 3 Industrial/$150 Subdivision '$150 USR RE RICPUD Other - Access Pictures (From the Left, Right, & into the access) By accepting this permit, the undersigned Applicant, under penalty of perjury, verifies that they have received all pages of the permit application; they have read and understand all of the permit requirements and provisions set forth on ail pages; that they have the authority to sign for and bind the Applicant, if the Applicant is a corporation or other entity; and that by virtue of their signature the Applicant is bound by and agrees to comply with all said permit requirements and provisions, all Weld County ordinances, and state laws regarding facilities construction. Signature lie Printed Name Cu,) ,, Date gill I Approval or Denial will be issued in minimum of 5 days. Approved by Revised Date 6/29/10 AC.ORLI CERTIFICATE OF LIABILITY INSURANCE DATE IMMIDD/YYYY) 08/02/2017 THIS CERTIFICATE IS ISSUED AS A MATTER OF INFORMATION ONLY AND CONFERS NO RIGHTS UPON THE CERTIFICATE HOLDER. THIS CERTIFICATE DOES NOT AFFIRMATIVELY OR NEGATIVELY AMEND, EXTEND OR ALTER THE COVERAGE AFFORDED BY THE POLICIES BELOW. THIS CERTIFICATE OF INSURANCE DOES NOT CONSTITUTE A CONTRACT BETWEEN THE ISSUING INSURER(S), AUTHORIZED REPRESENTATIVE OR PRODUCER, AND THE CERTIFICATE HOLDER, IMPORTANT: If the certificate holder is an ADDITIONAL INSURED, the policy(ies) must be endorsed, If SUBROGATION IS WAIVED, sub act to the terms and conditions of the policy, certain policies may require an endorsement. A statement on this certificate does not confer rights to the certificate holder in lieu of such endorsernenttsL, PRODUCER IMAs Inc. - Colorado Division 1705 17th Street Suite 100 Denver, CO 80202 1a303 -534- 4567 INSURED Discovery Midstream Holdings, LLC 7859 Walnut Hill Ln suite 335 Dallas, TX 75230 COVERAGES CONTACT P EioN>; FAX ,�.No i NC N e•MAIADDRESS: denaocounttach9QirnaCorp • coin INSURER S AFFORDING COVERAG INSURER A' FEDERAL INS CO (Chubb) INSURER 8 : VIGILANT INS CO ( Chubb INSURER C : INSURER ID INSURER E INSURER F CERTIFICATE NUMBER; 50526563 NAIL 11 20261 20397 -VISION NUMBER: THIS IS TO CERTIFY THAT THE POLICIES OF INSURANCE LISTED BELOW HAVE BEEN ISSUED INDICATED. NOTWITHSTANDING ANY REQUIREMENT, TERM OR CONDITION OF ANY CONTRAC CERTIFICATE MAY BE ISSUED OR MAY PERTAIN, THE INSURANCE AFFORDED BY THE POL EXCLUSIONS AND CONDITIONS OF SUCH POLICIES LIMITS SHOWN MAY HAVE BEEN REDUCE I TO ES Y E1 t5 O De stumpHEREIN PAID C TIR +� ICE H DOCUMENT mid, ED ABOVE FOR THE POLICY WITH RESPECT TO WHICH IS SUBJECT TO ALL THE PERIOD THIS TERMS, '�i. - INSR L,TR. TYPE OF INSURANCE DL O POLICY NUMBER ice_ i_ C -Y MIMIIO P1 LtC:�XP MM/QD I tvY I LIMITS A X COMMERCIAL GENERAL LIABILITY 36029589 , .?-C!S_ (5 / Q 4 '17 . 1 4S► ovis EACH OCCURRENCE 1 1,0000000 l ( I.t5 OCCUR r A-r T- RE=NITE5ICLAIMS-MADE P'RE oi,§:EEsika orcpwr ��r $ 10000,000 hiEc © E}:P (Any Q� person) 10, 000 - cs PERSONAL & ADV INJURY $ 1- r 000,000 GEM. AGGREGATE LI MIT APPLIES PER; ,. GENERAL AGGREGATE $ 2,000,000 POLICY P f LOC .o : PRODUCTS - COMP/OP AGG $ 100000000 $ OTHER: I A AUTOMOBILE LIABILITY I 7359385 ^-., 05104/17 45/04/10 l€0M%s1LEuMrt $ 1 j 000 r 000 X ANY AUTO `� BODILY INJURY Par person) $ 2thNED MS HEULEa AUTOS 'Nk; \ BODI LY INJURY {Per accident} $ PROPERTY O. 1MIAGE r auctuien( $ X I N+at�l OWNED HIRED AUTOS AUTOS(P $ rip-, i'yp A X UMBRELLA LIAR# X_ OCCUR9 94 05/04/17 05/04/1e EACH OCCURRENCE 1000000000 EXCESS LIAR CLAIMS -MADE '`► AGGREGATE 10 , 0 0 0 , 0 4 LI OED I I RETENTIONS 5 WORKERS COMPENSATION A NO EMPLOYERS' LIABILITY ' ,. i 'Ad: j r I PEE STATUTE I 101 I - ER El EACH ACCIDENT $ ► NY PROP'1;<IEtoRrPAnrr4E rtExrt . OFFICER/MEMBER EXCLUDED'? VC 44 '; N i A E L. DISEASE - EA EMPLOYEE'S $ (Mandatory In NH) If ydrDS, &Sum a under DESCRIPTION OF 'ERAT101i!1 b bw! '"a I E L DISEASE - POLICY LIMIT S E Sudden & 3Lac ide tai Po11uttor r 36042591 45/04/17 05/04/18 Deductible $1004000 Per accurence Si, 000, 4 4 0 Aggregate $21000,000 i DESCRIPTION Or 6PER4T10448I LOCATIONS I VEHICLES {ACORN 101, Additional Remarks Schedule, may be 'attached if more space $s required .� it b7 ' Y Y 1e! . F A 1' :, eERTIFICATE HOLDER CANCELLATION Nkt, For Information Only SHOULD ANY OF THE ABOVE DESCRIBED POLICIES BE CANCELLED BEFORE THE EXPIRATION DATE THEREOF, NOTICE WILL BE DELIVERED IN ACCORDANCE WITH THE POLICY PROVISIONS. AUTHORIZED REPRESENTATIVE /4//z ACORD 25 (2014/01) hogan24 4 50526563 O1999-2014 ACORD CORPORATION. All rights reserved. The ACORD name and logo are registered marks of ACORD (Engineer's Stamp) WELD COUNTY DRAINAGE CODE STANDARDS AND CRITERIA VARIANCE REQUEST FORM -FOR ENGINEERS CODE SECTION 23-12-150 Pre-Application/Case Number LAS n son 2. Parcel Number I 2 (3 - 2'`3'Li " (X)' D 1 Co Legal Description E t/2.. 52.5 TD34 R(�VJ (etb( PM Section/Township/Range -ro3gr/kosw f4A, I A Af P, Consultant Engineer for O\ f i 051:16:; ' mj ("Applicant"), understand and acknowledge that the Applicant is seeking land use approval of ifirt4 CLL :l (description of use) for the parcel described above. I have designed or reviewed the design ("Design") for the proposed land use set forth in the Application. I hereby certify, on behalf of Applicant, that the Design will ,etaitiHoIicable drainage requirements of the Weld County Code with the exception of variance(s) describe ealt edification is not a guarantee or warranty either expressed or implied.�`� Ole)I-��• �$' C • • (17• Ph Engineer of Re I OE) S I 0 k 'Saki i Applicant, understand and agree: that the intention of the Weld County Code is to reduce impacts of development on neighboring downstream properties and the public, that I am responsible to ensure no negative impacts to offsite properties occur, and that Weld County does not assume liability for damages from storm drainage. If this variance request is approved it is not precedent setting and is based on site specific constraints. Applicant Signature Please attach a separate document (Exhibit A) .addressing the following: 1. Describe the design criteria of the Weld County Code of which a variance is being requested. 2. Describe the proposed alternative with engineering rationale which supports the intent of the Weld County Code. . Meet the design intent of the Weld County Code. 4. Demonstrate that granting of the variance will still adequately protect public health, safety, and general welfare. 5. Demonstrate there are no adverse impacts, from stormwater runoff, to the public rights of way and/or offsite properties as a result of the ,project. Planning Director Approval indicated when signed by Director or appointee: Planning Director Name Signature Date of Approval 11/03/2015 mot eL Lotsnley Colorado pep tirtment afP!ar rfing,,SeivIces DeVerpplizen1'RingioW f 7l-fh.Ay rice. arettoy, CO 80631 I Pry, 0701;35443 p' [ so le.. t i eiDgtie 'rtirrt etl ina il DISC o VERY MIDSTREAM PARTNER'S DRAINAGE VARIANCE REQUEST drainage Variance Request Narrative Discovery Midstream Partners ("Discovery") proposes to construct an oil terminal facility located in the East section of Section 25, TORN, R65W west of the 6Ih Principal Meridian in Weld County, Colorado. The site is approximately 44.5 acres in area and sits south of Weld County Road 30 and west of Weld County Road 49 The facility will contain three 100,000 barrel storage tanks, two 250,000 barrel storage tanks, 7 pumps, one launcher, and one receiver. This document summarizes the site drainage with the intent of requesting a waiver from the Weld County Department of Public Works requirements for a full drainage report and design and construction of a detention pond(s) for the proposed site The existing site, which is currently zoned as agricultural use, drains from the southwest corner of the site to the northeast corner of the site and is completely featureless, Currently, the existing location has less than 0.7% grade for all areas other than the northwest corner, which is 1.2% slope. Flow across the proposed site is sheet flow with no natural drainage channels or ditches evident on site. Drainage of the site flows toward the parcel to the northeast where it moves onto the continuation of the Wes Moser agricultural property. Slopes on the site average 1-1,5 across the site with some slightly steeper sections sloping around 3,5%. The purposed site sits on the edge of an FEMVMA flood zone; therefore, all equipment is situated outside of the flood zone to minimize effects to this area. Proposed grading for the site is designed, in general, to follow the natural drainage and to smooth out the slight rises and depressions across the site to give an even sheet flow draining from southwest to northeast. The proposed grading is only for the 0.40 acres dedicated to the plant area and access road and 3.7 acres will contain building and tanks, The remaining acreage will be left undisturbed. In addition to the grading of the site for drainage, structural fill will be imported to construct a secondary containment berm around the planned storage tanks. The area inside the containment berm will drain to the northeast end of the containment where it can be pumped out of the containment area in the case of a major storm. The inside area of the containment berms totals approximately 10.45 acres and is not designed to have an outlet to public drainage facilities. The existing imperviousness of the site is 2.0%. The total imperviousness for the proposed site is 11%, taking into consideration the areas of gravel for vehicle access, buildings, and the tank containment area. Therefore, the proposed changes only increase the imperviousness of the site by 9%. The imperviousness calculation is included in the tables located on page 2, 3, and 4. In addition to the increase in total site imperviousness being small, the site soils have very low potential for runoff. The site, according to NRCS soils maps, consists of 59.9% Colombo clay loam (0 to 1i% slopes), 19.8% Valent Sand (0 to 3% slopes), 15.0% Vona loamy sand (0 to 3% slopes), 3.7% Loup-Boel loamy sands (0 to 3% slopes), 1,1 Vona loamy sand (3 to 5% slopes), and 03% Otero sand loam (1 to 3% slopes), A NRCS soils report and map are included at the end of this report. The predominant soils on the site are the Colombo clay loam, which is considered slow to medium run off class and valent sand which is considered low run off class. The remaining soils range from "low" to "negligible" runoff classes as well. All soil types on the site range from "excessively drained" to "well -drained" for the natural drainage class. Because of the proposed site location in the northwest corner of the parcel, additional runoff due to the increase in imperviousness will have approximately 500' to travel before leaving the property. This distance, combined with the agricultural property to the north east, provides adequate time for runoff to infiltrate the soil based on the soil type. The calculated infiltration rate of the site, using the Horton model, is 1.32 in/hr. According to the Drainage Criteria Manual, this area produces 2.? of rain for 100 -year, 1 -hour storm. Therefore, a peak rate of runoff was calculated at 22.3 ft /sec. Since this is an agricultural area it will create minimal run off, See the attached drainage calculations for both the infiltration rate and the peak rate of run off. DISC VERY MIDSTREAM PARTNERS DRAINAGE VARIANCE REQUEST In our estimation, the proposed grading and drainage for the project will adequately protect public health, safety and general welfare and will not cause adverse impacts from storm water runoff to public rights of way or offsite properties. The increase in imperviousness and peak run off rate of the site are minimal and should not cause any undue burden on storm water systems or adjacent properties. Furthermore, the analysis provided in this report indicates that the need for a detention pond will be unnecessary. i References Urban Storm DrainageCriterria Manual Volume 1 Input Cell Rcommended Value Calculated Result Iterative Cell imperviQasuess Client: Rev D Discovery Oy Checked JM ivi CRhli I Project: Discovery O i l Terminal Description issued for Permit Date 8/2/2017 Varlob/e Value Units Notes Existing Conditions Area of Undevel aped (Agri eul tura I I mpervi ousnes s Factor imperviousness Proposed Conditions Area of Undeveloped/Agricultural Impervious nes s Factor Area of Gravel Imperviousness Factor Area of Roof Imperviousness Factor Tota I Ac rea ge tmpervlou mess Infiltration Rate Area ix ft Area lY Area Area t1 Area lr Variable NRCS Soil Class Per cengage of Site Initial Infiltration Rate Final Infiltration Rate Dec.3y Coefficient Time infiltration Rate Peak Rate of Runoff NRCS Soil Class Design Storm Runoff Coefficient Value Variable 44,5 0.01 2.0% 39.8 0.02 1.0 0.40 3.7 1,00 44.5 11% acre acre acre acre a c re 4 Value Units add reference _,Area, *Jj) * (Area 2 1r)..J/Tota?Area add reference add reference add reference ft!J(AreaJ frfa) f(Area , ''f2)... Total Area Notes on/hr in/lit hec Sec ire/hr Units Table 6-7 Urban Storm? Drainage Criteria Manual volume 1 Table 6-7 Urban Storm Drainage Criteria Manual volume 1 f---10 * Cif - fo)e•0l Notes Average Intensity of Rainfall Time Concentration Area Peak Rate of Runoff C l to A A 100.0 0.20 3.7 I 1.0 In r 44.50 33.5 yea r calculated using Table 6-7 Urban Story, Drainage Criteria Moraual vvfume 1; see below baps /}r15+ invtic no ww rn/utilit a siunq/!dawjc j c1 / UMW V aC rtai lrr 4 RQiota ff r+da hr Table 6-7 Urban Storm Drainage Criteria Manual volume .t arce tt 1/sec = Cl; Q has a Urilt of inches per hour per acre (fn/hour/ach however, since this rate al acre inches /our differs from cubic feet per second Ws) by less than one percent, the more common wilts of cfs are used DISC o VERY MIDSTREAM PARTNERS DRAINAGE VARIANCE REQUEST Table 6-4. Runoff equations based on NRCS soil group and storm return period Storm Return Period NRCS Soil Group 2:Year 5 aYea r 10 -Year 25 -Year 50 -Year I - Year 500 -Year A CA= 0.84P12 CA- CA= CA= C CA= CA 0.86111216 0.87/1'212 0.84iiii24 0,85140.025 0.78130.110 0.6500.2 54 B s Cos Cisis= 0.8611-m j 0.8 1140.057 u 'r 0.631+0.249 ,!`may' 'fr 0.61+0328 .0 0.47140.426 CH 0,37140336 °Mill" OD `um= .83x',122 Cum it 't�. = C = ;in= 0.82/4 0.035 m 034140.132 it 0.561+0.319 CM 0.49140.393 CUD- 0.41140.484 Ca,) 0.32140.588 Where: % imperviousness (expressed as a decimal) `. T RunolYn flieient for Natural Resources Co;iscwvat ars Service (NRCS) I ISG A soils ( = Runoff coefficient for NRCS :I 15+ B soils Gm _ Runoff coefficient icienrt for NRCS 1 IS0] C and f) i ls. DISC o VERY MIDSTREAM PARTNERS DRAINAGE VARIANCE REQUEST RIFW ,�y 2.4 2.5 I 2 R 70 W 65 2..7 R $9 W 2.7 R 68 W R 2.' 67 i W R 66 W �s 2r65 R 66 1 2.7 R 64 W' R 113 W LONG 11�T i` it z - 04 NNW tsi Z .L3 AO 1 Illikwa k au. arm Y ,,,m IP, 1 Da _ ,, pont il iji 14 , : v, r4 V : tlfi lirdieN„,,, 1111%111 alLittEn till I 1 LA AO IM•Yri #1 in 64 Pr r-40elea lin Mg! WA- iin ailliS_ 1AJ4Lr'1 In rig" r rim' i42,1ill I JARAPA140E i ii lei., r vtal r Eth 60 la Ei 1 it in 9�ctEARAPAHO ,... 165 �* '6 2.05 NITER to fr-L° • 1 Ill in, i c _ , 4 I 4,tGIAS4: II . 1E: la it in lith I510.4O.4 miiii in l'`"' „2 6 p. illik MISES r moo R 7! R 70 35R83w 2.5 RE7V R id R86IV Rao Pi 1rfig w Figure RAR6-nRaintall Depuratlon-Frequency: 100 -Year, i-Hour Rainfall fu a. C V 4) `0o c ct C .t 0 0. i5 C o lei 2 MAP INFORMATION MAP LEGEND v a ED 2 o L v E 8 co Q tp r CO 0 Si if E 000aa 4.] ,Q -O 43 a iv 0 co3 E E E E C gic u. gco>E TA w day E Q 0) c 02 0 0 ea] en asia- m Q' L -G rl f"' ;) (0 a @• Q C C gay to en C G� d) Wc• urag al to 4 G 4 0 C (413 a� C d7 Very Stony Spat O to • r•`••� C Soil Map Unit Polygons Soil Map Unit Lines Sod Map Unit Points U Special Line Features a B!i3.c 4 0 ca 0. •— 2 0 o b EGI W 0 m�.t t�� V ...t 'ii C ^• - -v '= O 1g al -��ca. uri JO ci . 0 a 4 CO 4 CL d? 0 Jan 13 20 n ke 0 'a O 0 la'0 • zi 0:1 15 P cu_ .,_ "- 0 § iu fl ..:2 .......3 a .0 coa 71 0 c0 a `., a I 0 G5 to-i co c s .Q C O . rfa C ua t" C E a ri, CL E o)>C) W av< Mb -- c I co 0 •O JI Jr) _ (A et m E 0ce �w/ L as L it O 0 CC a *. - m ci it id • L. t g LII Special Point Features Local Roads 2 2 I" CO C O co O. a. 400 ICA Q. a' a ail >. _ ig a - i rte. E C • › la CO 0 t`3 0 0 —i a 0 K 0 A6 Aerial Photography i Marsh or swamp I Mine or Quarry Cu C 5 r CO _r T N N o 0) cto 4 C za 0 >4 43 Ilaneaus Water 01 tin a. E w tp its a ca Et) 2 EEC 0 CI w 0 E Ca CaO r Perennial Water O Mar let 2012 —Apr O. 0 a IC 2 8 a, CIS C•4 I a� au C La C c 0, E o_0 a c ou • adi r e 73 .C L N o 115s, g N � .{1)Et 0 *56 oc C3 o aal t 93 w C O '.Ei, Q C "- a EL 5 P a. .a+ 6 0 2. 0 6 (/) QJ >... ` tom] CC [Q� o cc to co co to tf� co It At V./ YJ O 0 cn Et? V1 a. z 0 U) y• "yfy�3l 0 In as is ce sere v to sea 20 11 a Soil Map -Weld County, Colorado, Southern Part Discovery Oil Terminal Map Unit Legend Weld County, Colorado, Southern Part (CO618 Map Unit Symbol Map Unit Name Acres in AO1 Percent of AOI 19 35 51 69 72 73 Totals for Area of interest Colombo clay loam, 0 to 1 percent slopes Loup-Boel loamy sands, 0 to 3 percent slopes Otero sandy loam, 1 to 3 percent slopes Valent sand* 0 to 3 percent slopes Vona loamy sand, 0 to 3 percent slopes Vona loamy sand, 3 to 5 percent slopes 123.2 76 10 401 30 9 2.4 205,8 59_9% 3 7% 0 5% USDA Natural Resources Web Soil Survey Conservation Service National Cooperative Soot Survey 7/17/2017 Page 3 of 3 Drainage Report Discovery Midstream Partners Oil Terminal Facility Weld County, Colorado Prepared for PSI LLC November 20, 2017 Daniel B. Stephens & Associates, Inc. 6020 Academy NE, Suite 100 • Albuquerque, New Mexico 87109 Daniel B. Stephens & Associates, Inc. Table of Contents Section Page Certification of Compliance ii 1. Introduction 1 2. Scope of Work 1 3. Drainage Analysis 2 3.1 Pre -Development Conditions 2 3.2 Post -Development Conditions 3 3.3 Off -Site Drainage Routing 4 4. Maintenance 5 5. Conclusions 5 List of Tables Table Page 1 Post -Development Land Use . 3 Appendix A NOAA Rainfall Map B Stormwater Drawings C MRCS Soil Map D Calculations E Maintenance Plan List of Appendices F:1 DB17-13191DrainageRpt. N-17\Fi nal_N20.docx i Daniel B. Stephens & Associates, Inc. Certification of compliance I hereby certify that this drainage report was prepared by me (or under my direct supervision) and meets the applicable drainage requirements of the Weld County Code. This certification is not a guarantee or warranty, either expressed or implied. 0-3o Lk: b''• { U1/4J ' 2 53043 rfai: e AeSS. gdf Po6a Kelly Isaacson Jayne, P.E. Registered Professional Engineer State of Colorado No. 53043 There is no variance request for this project. F:1 DB17-13191DrainageRpt. N-17\Fi nal_N20.docx i i Daniel B. Stephens & Associates, Inc. Drainage Report Discovery Midstream Partners Oil Terminal Facility Weld County, Colorado 1. Introduction Discovery Midstream Partners (Discovery) proposes to construct an oil terminal facility located in the East section of Section 25, T03N, R65W west of the 6th Principal Meridian in Weld County, Colorado (the site). The site is approximately 32.5 acres in area and sits south of Weld County Road 30 and west of Weld County Road 49. The facility will contain four 100,000 -barrel storage tanks, one 250,000 -barrel storage tanks, seven pumps, one launcher, and one receiver. This drainage report summarizes the stormwater infrastructure to be installed for the proposed development, and has been prepared in accordance with Weld County regulations and the Urban Drainage and Flood Control District (UDFCD) guidelines. 2. Scope of Work The following infrastructure will be installed as part of this development: • Five storage tanks • Secondary containment berm around the storage tanks • Pumps and measurement stations • Two small support buildings • Gravel access roads This drainage report describes the stormwater infrastructure that will be installed as part of the project, which includes the following: • Grass -lined channel to route off -site flows around the site • Grading to route on -site flows to the stormwater pond F:1 DB17-13191DrainageRpt. N-17\Fi nal_N20.docx di Daniel B. Stephens & Associates, Inc. • Extended detention basin that meets stormwater quality objectives and reduces post - development runoff to pre -development runoff peak discharges • Grass -lined channel to route on -site flows from the stormwater pond discharge pipe to an existing natural drainage feature 3. Drainage Analysis As discussed in detail below, the overall increase in impervious area on the site is 6.5 percent, from an assumed 2 percent in the undeveloped condition to 8.5 percent of the total acreage. Given the nature of the development, this project is considered "urbanizing." For all analyses, the rainfall depths were taken from National Oceanic and Atmospheric Administration (NOAA) Atlas 14 for the site (Appendix A). Impervious percentages were taken from the Weld County Engineering and Construction Criteria Manual (WCECCM) for the pre - development conditions and measured in AutoCAD for the post -development conditions (Appendix B). 3.1 Pre -Development Conditions The site is 32.5 acres zoned for agricultural use. Site drainage flows to the northeast, where it continues onto adjacent agricultural property owned by the same landowner as the site. Flow across the site is sheet flow with no natural channels or manmade stormwater management facilities. The site is generally very flat, with an overall slope of less than 1 percent. There is an area of steeper slope (approximately 3 percent) on the northern portion of the site. A portion of the site is designated as 100 -year floodplain on the applicable National Flood Insurance Program Flood Hazard Map (Zone A, Map Number 08123C1975E, Map Panel Number 1975E). All planned development on the site, including stormwater facilities, is located outside the designated floodplain. The site soils consist of clay loam, sand, and sandy Ioams (Appendix C). The on -site soils fall into Hydrologic Group A, which have a low runoff potential when wet. P:1_DB17-1319\arainageRpt.N-17\Final_N20.docx 2 Daniel B. Stephens & Associates, Inc. The regional topography around the site also has shallow slopes (less than 2 percent). The area contributing run-on flows that will be intercepted by site development is approximately 65 acres. 3.2 Post -Development Conditions Post -development, the site will have various land uses as described in this section. Table 1 summarizes the acreage of each land use. Table 1. Post -Development Land Use Land Use Area of Land Use (acres) Undisturbed 19.7 Secondary containment berm (no runoff) 9.1 Disturbed (contributing on -site drainage) 3.7 Total 32.5 There are significant portions of the site that will be undisturbed after construction. As the pre - and post -development runoff from these areas will remain the same, no stormwater infrastructure will be installed, and the runoff from these areas will be allowed to continue in its current (pre -development) patterns. Per NFPA 30 and 40 CFR 112, secondary containment is required around the storage tanks. The secondary containment planned for this site is an earthen berm with a minimum height of 4 feet. The secondary containment will retain stormwater that falls within the berm; this stormwater will infiltrate and evaporate, and will not runoff the site. The secondary containment berm for the tanks can easily store the 100 -year storm for this portion of the site. Therefore, there will be no runoff from this area. Development that will generate runoff is located mostly on the north side of the site, and includes the areas with the pump skid, buildings, and roads. Although flow out of the secondary containment berm is not anticipated, for conservativism the secondary containment area was included in the impacted site area runoff calculation (secondary containment area is 9.1 acres, P:1_DB17-1319\arainageRpt.N-17\Final_N20.docx 3 Daniel B. Stephens & Associates, Inc. for a total of 12.8 acres). The peak discharge for this area was determined using the UDFCD rational method calculation (Appendix D). The UDFCD detention calculation was used to size an extended retention basin to manage stormwater runoff from the site. Per UCFCD guidance, the UDFCD culvert calculation was used to size the discharge pipe from the basin. The basin's outlet structure has an orifice plate that restricts flows below the 100 -year storm to pre - development peak discharges and a restrictor plate on the discharge pipe that restricts the 100 - year storm to 90 percent of pre -development peak discharge (Appendix B). The road on the east side of the pond serves as the spillway for the pond, and can easily convey flows greater than the 100 -year peak discharge with less than 18 inches of flow depth, as required by WCECCM Section 5.6.1. The pond discharge pipe discharges to a grass -lined stormwater channel that routes water in its original natural flow path. The channel sizing calculations are included in Appendix D. Per WCECCM Table 5-9, analysis of flow depth, velocity, and Froude number were compared for two different Manning n values to assess channel capacity and stability in a variety of conditions. The channel design satisfies all applicable requirements for grass -lined channels in erosion resistant soils. This analysis was completed using Manning's Equation in the computer software Bentley FlowMaster. All relevant assumptions and calculated flow characteristics are included in Appendix D. As the UCFCD detention basin design is completed for the 100 -year peak discharge, the grass -lined channel receiving the pond discharge was also sized for the 100 -year peak discharge. Post -construction, the total impervious area of the site will be 2.8 acres, including 0.6 acre of gravel and 2.2 acres of building and tank roofs. The entirety of the gravel is in the disturbed watershed outside the secondary containment berm. Less than 0.1 acre of roof area is in the disturbed watershed outside the secondary containment berm; the remaining 2.1 acres of roof area is inside the secondary containment berm. 3.3 Off -Site Drainage Routing There is approximately 65 acres of land west of the property that drains onto the site. The peak discharge for this area was determined using the UDFCD rational method calculation (Appendix D). Per WCECCM Section 5.11.1, off -site flows cannot be routed through the F:1 DB17-13191DrainageRpt.N-17\Final_N20.docx 4 Daniel B. Stephens & Associates, Inc. detention pond outlet, and must be routed around the site or over the pond spillway. Given the site topography, routing off -site flow to the stormwater pond spillway is not viable. Therefore, a channel will be installed along the west and south sides of the containment berm to route off -site flow through the property. Per WCECCM Table 5-9, analysis of flow depth, velocity, and Froude number were compared for two different Manning n values to assess channel capacity and stability in a variety of conditions. The channel design satisfies all applicable requirements for grass -lined channels in erosion resistant soils. This analysis was completed using Manning's Equation in the computer software Bentley FlowMaster. All relevant assumptions and calculated flow characteristics are included in Appendix D. Per WCECCM Table 5-10, because the site land use is industrial, the channel was designed to convey the 10 -year peak discharge with the minimum freeboard. Given the very shallow slopes in the downstream watersheds, once the flow is routed through the property, the channel will fan out to return the water to sheet flow to continue in the pre - development flow paths. 4. Maintenance Stormwater infrastructure has been designed to be low maintenance to improve long-term performance. Maintenance, inspections, and repairs will be completed in accordance with the Maintenance Plan (Appendix E). Maintenance activities primarily consist of maintaining appropriate vegetation (through both revegetation and mowing), removal of sediment accumulation, and maintenance of the discharge structure to keep it free of obstructions. 5. Conclusions In general, impacts from this development are anticipated to be minimal, as the developed area contributing runoff is less than 10 percent of the total site acreage. As illustrated on the UDFCD detention spreadsheet, the peak discharge from the disturbed area for the 100 -year storm is 90 percent of the pre -development runoff rate per UDFCD requirements, and very near the pre - development runoff rate for other storms. After on -site routing, off -site and on -site flows will be F:1 DBI7-13191DrainageRpt.N-17\Final_N20.docx 5 Daniel B. Stephens & Associates, Inc. returned to their original flow paths similar to the pre -development conditions (shallow flow). In general, stormwater impacts from the site will be minimal due to the runoff reduction from stormwater contained within the secondary containment berm. F:1 DB17-13191DrainageRpt.N-17\Final_N20.docx 6 Appendix A NOAA Rainfall Map Precipitation Frequency Data Server Page 1 of 4 NOAA Atlas 14, Volume 8, Version 2 Location name: Hudson, Colorado, USA* Latitude: 40.1912°, Longitude: -104.6197° Elevation: 4836.4 ft** * source: ESRI Maps ** source: USGS POINT PRECIPITATION FREQUENCY ESTIMATES Sanja Perica, Deborah Martin, Sandra Pavlovic, Ishani Roy, Michael St. Laurent, Carl Try paluk, Dale Unruh, Michael Yekta, Geoffery Bonnin NGAA, 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 Average recurrence interval (years) 1 0.241 (Q.193 -0.3Q3 0.353 (0.283-0.443) 0.430 (Q.345 -0.54Q 0.578 (0.464-0.726 0.712 (0.571-0.894) 2 -hr 0.846 (0.684-1.05) 3 -hr 6 -hr l 12 -hr L 24 -hr 2 -day 3 -day [day 7 -day I 10 -day 20 -day 30 -day I45 -day 60 -day 0.923 (0.75Q-1.14 1.08 (0.887-1.33) 1.27 (1.05-1.55) 1.51 (1.26-1.82) 1.72 (1.44-2.05) 1.88 (1.58-2.23) 2.01 (1.70-2.37) 2.30 (1.96-2.69) 2.55 (2.18-2.97) 3.26 (2.81-3.76) 3.83 (3.32-4.39) 4.52 (3.94-5.15) 5.08 (4.44-5.77) 0.292 (0.234-0.367) 0.428 (0.343-0.538) 0.522 (0.418-0.656) 0.698 (0.559-0.877) 0.850 (0.681-1.07) 1.00 (0.809-1.25) 1.08 (0.878-1.34) 1.26 (1.03-1.54) r 1.50 (1.23-1.82) 1.78 (1.48-2.14) 2.06 (1.73-2.46) 2.23 (1.88-2.65) 2.36 (1.99-2.79) 2.68 (2.28-3.15) 2.96 (2.53-3.46) 3.75 (3.23-4.33) 4.39 (3.80-5.04) 5.18 (4.51-5.92) 5.85 (5.11-6.65) 5 0.390 (0.311-0.491) 0.571 (0.455-0.719) 0.696 (0.555-0.877) 0.929 (0.741-1.17) 1.12 (0.897-1.42) 1.32 (1.06-1.65) 1.41 (1.14-1.76) 1.62 (1.32-1.99) 1.92 (1.58-2.34) 2.26 (1.87-2.73) 2.65 (2.21-3.17) 2.83 (2.37-3.36) 2.96 (2.49-3.51) 3.33 (2.82-3.91) (3 3.66 .11-4.28) (3 4.54 .90-5.26) 5.28 (4.56-6.08) (5 6.23 .41-7.14) (6 7.06 .15-8.05) 10 0.484 (Q.383-0.612 0.708 (0.562-0.897 0.863 (0.685-1.09) 1.15 (0.914-1.46) 1.40 (1.11-1.77) 1.64 (1.31-2.06) 1.76 (1.41-2.19) 1.99 (1.61-2.46) 2.33 (1.90-2.86) 2.71 (2.23-3.29) 3.16 (2.62-3.80) 3.35 (2.79-4.00) 3.48 (2.91-4.14) 3.88 (3.27-4.58) 4.24 (3.59-4.97) 5.20 (4.44-6.04) 6.01 (5.16-6.95) 7.07 (6.10-8.13) 8.02 (6.94-9.18) 25 0.632 (0.491-0.853) 0.925 (0.719-1.25) 1.13 (0.877-1.52) 1.51 (1.17-2.04) 1.84 (1.44-2.50) 2.17 (1.71-2.93) 2.33 (1.85-3.13) 2.61 (2.09-3.48) 2.98 (2.39-3.88) 3.40 (2.73-4.34) 3.90 (3.14-4.88) 4.10 (3.31-5.09) 4.23 (3.44-5.23) 4.66 (3.80-5.69) 5.04 `(4.12-6.11) 6.09 (5.01-7.27) 6.99 (5.77-8.27) 8.19 (6.80-9.62) 9.27 (7.71-10.8) 50 0.761 (0.573-1.03) 1.12 (0.839-1.52) 1.36 (1.02-1.85) 1.82 (1.37-2.48) 2.24 (1.69-3.05) 100 0.904 (0.654-1.26) 1.32 (0.957-1.84) 1.61 (1.17-2.25) 2.17 (1.57-3.02) 2.68 (1.94-3.74) 200 1.06 (0.733-1.52) 1.56 (1.07-2.22) 1.90 (1.31-2.71) 2.55 (1.76-3.65) 3.17 (2.19-4.55) 500 1.29 (0.854-1.90 1.89 (1.25-2.78) 2.31 (1.52-3.39) 3.11 (2.06-4.57) 3.90 (2.58-5.74) 2.65 3.19 3.79 4.69 (2.02-3.59) (2.33-4.42) i (2.65-5.39) (3.14-6.83) 2.85 (2.18-3.84) 3.18 (2.46-4.25) 3.56 (2.76-4.66) 3.99 (3.11-5.14) 4.50 (3.53-5.70) 4.70 (3.70-5.91) 4.84 (3.83-6.06) 5.28 (4.20-6.53) 5.68 (4.53-6.97) (5. 6.77 44-8.19) 7.72 (6.24-9.27) (7. 9.01 32-10.7) 10.2 (8.29-12.1) 3.44 (2.53-4.74) 3.82 (2.84-5.22) 4.18 (3.13-5.61) 4.62 (a47-6.09) 5.13 (a88-6.65) 5.33 (4.Q5-6.86) 5.48 (4.18-7.02) 5.92 (4.54-7.49) 6.31 (4.87-7.93) 7.44 (5.78-9.21) 8.44 (6.59-10.4) 9.81 (7.70-12.0) 11.0 (8.70-13.4) 4.10 (2.89-5.80) 4.55 (3.23-6.37) 4.89 (3.49-6.72) 5.31 (3.82-7.19) 5.79 (4.19-7.70) 6.00 (4.36-7.92) 6.15 (4.49-8.08) 6.58 (4.84-8.55) 6.97 (5.15-8.99) 8.11 (6.04-10.3) 9.15 (6.85-11.5) 10.6 (7.96-13.2) 11.9 (8.97-14.8) 5.09 (3.43-7.38) 5.64 (3.83-8.07) 5.91 (4.04-8.33) 6.30 (4.34-8.75) 6.70 (4.65-9.16) 6.92 (4.83-9.38) 7.07 (4.96-9.55) 7.48 (5.28-9.98) 7.85 (5.57-10.4) 8.99 (6.44-11.7) 10.1 (7.25-13.0) 11.5 (8.36-14.8) 12.9 (9.37-16.5) 1000 1.48 (0.945-2.18 2.17 (1.38-3.20) 2.65 (1.69-3.90) 3.58 (2.28-5.26) 4.51 (2.87-6.64) 5.44 (3.50-7.93) 5.93 (3.84-8.57) 6.55 (4.28-9.36) 6.75 (4.46-9.55) 7.10 (4.74-9.93) 7.42 (5.01-10.3) 7.64 (5.18-10.5) 7.80 (5.32-10.7) 8.18 (5.62-11.1) 8.52 (5.89-11.5) 9.65 (6.74-12.8) 10.7 (7.55-14.2) 12.2 (8.67-16.0) 13.6 (9.68-17.7) 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 https://hdsc.nws.naaa.gov/hdsc/pfds/pfds_printpage.html`Plat=40.1912 &ion= -104.6197&d... 11/14/2017 Precipitation Frequency Data Sewer Page 2 of 4 5 10 25 50 100 200 PF graphical PDS-based depth -duration -frequency (DDF) curves Latitude: 40.191r , Longitude: -1.41.6197'' c c E IX1ration rdli -C be to Tits wri 111:1 cgi rtS 4 A 6 .-r • • • • • M • • • • • II Y ■ a ■ • Y 4 i k i • I. A e f P •O r • • • r • s I • MMMMM • ■ • • • • s •_ • • • r • • e • e • • • • • •• ■ e r • • a e •F • • • • w a. a • I. JOAA Atlas 14r Volume 8, Version 2 Average recurrence interval (years) n3 m IN Ili Tr lei 500 1000 Created (GMT): Tue Nov 14 16:29:38 2017 Back to Top Are recurrence in ai (years) d 2 5 10 25 50 100 200 500 100C Duration ration 5-rr m 10-mo 3-+das 15 -mm — 4 -day 30- nin 7 -day Lei ri ~LAS 4 I' se ark W Ws, I in I • er-'acy 2 -hr 20 -day 3 —hr 30 -day 6 -hr — 45 —day 12 -hr — 60 -day 24=h r https://hdsc.nws.noaa.gov/hdsc/pfds/pfds printpage.htmPlat=40.191 &ton -104.6197 .d... 11/14/2017 Precipitation Frequency Data Sewer Page 3 of 4 Maps & aerials Small scale terrain I. 8 L errors a 3km 2mi Large scale terrain it l eea t4 wiar 0 isr 'at -for Mains Long:, Palk 43115n , Large scale map , B,U.Id r • rilsdicin s tiati S Fox: tO I e Fort Cornd s a L oB odder Greeley r https://hdsc.nws.noaa.gov/hdsc/pfds/pfds printpage.htmPlat=40.19 i &ton -104.6197 .d... 11/14/2017 Precipitation Frequency Data Sewer Page 4 of 4 Large scale aerial 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.Questionsnoaa.gov Disclaimer https://hdsc.nws.noaa.gov/hdsc/pfds/pfds printpage.htmPlat=40.19 i &ton -104.6197 .d... 11/14/2017 Appendix B Stormwater Drawings 5YA'3QdarNdld 31IS 3Wt XPASYNANI l- :3I14N 31U 3COM NOt3413y AR Doss -Z39 ( ) 9olaa YIN '3nW3nMew DOI 3uf6 '3N AY{C4.h+ UdO9 9tfl3NON3 'A SISIDEIIDS 1 th13INONIM13 •3aj 'sappossy sualagg g farted NV1 d 31IS Vut4 can tMHn na'rY '.I,Lw'I EI^i S1 WS'S EEG l • CI C? fl z r mw O r -1 C3 imr Llit I/al-tn] xi ;AB oxceNJ a- rNN ;AB MInnmo Et05T1NG GOHTAJR5 0 W J W 0 t. 0Lc a PROPOSED EfSEHENf PARCEL BOJUN1X W( FLODOPLPJN LINE TRACKNC CONTROL WASHUUT AIEA LACATION: SECI1CNS 25, TIN, z r / W= d a I e —o •--tf--f ur o — G M c N, N. X sgz� d 1,i d O C �— 2 °oat - - � o _ti�y�S,,. — x w7� tte f = o � O W w W / r r l 5 i S W az 94/ rad _— 71— -- f J ti se = i — i i_\_-- J / ` 1tfi tPS -I LA= \ t, c Q ----�--- N feII-••••I/f`Nems! f- e .1—r e 7— fg II II / X11 ---_Z.-3 I I-Iyl� Q i J J a %573:Krtifid Sus 3111=14120:1341 I-3\140113n9CciNw\NThsf 110-Atflc 1$191SflI.Cl•GL89\SL739Pid1S 2M0'WfiS 316 3aRL7f 81SVa ANI 4—•J :NON 314 313VVI Na5V3a AS 7114 ON COVE -Cal (595) 84LGf3 Y4P! 'antieenionErro O0L 311s '3N ,UY3Qv& OW S 33NIcta ELSW,BIZE 'h+1N3HN0aIAN3 •OW 'soma -ow *A s[rarldaw U 7ang LiftLfCL3114 PA vs 9rc3N0 ;l8 NM7da ra c's mNiiS3a i�f g- at IN': a L rot siIv_3a 3If11Df1h1SVWINI b31VAIA O1S 'an.baaribriEnv vidsaa to Appendix C NRCS Soil Map Soil Map —Weld County, Colorado; Southern Part 1O 11'55'N 4Q° II' Ig'N 10412 36' 4B" 'iv r a F 537-1230 r_s awn 'r� e- :te �.a r• TM - - - a 5 I I I I I I I I I 683033 633103 633203 X00 5`.-3403 833 C 6236024 &A(} 6138000 Map Scale: 1: 6,420 if prir1cd oh A pci'b'ait (8.5" x 11") S-tcct. Meters M 0 50 1OD 200 30 A Feet 0 30D 603 1230 1800 Map projection'+: k' 'SDA Natural Resources ass Conservation Service Me -rater Corner cocrclinatas: W S84 Edge tics' JTM 2cne 13N ING^SSd Web Soil Survey National Cooperative Soil Survey LO4° 36' 6" W 533930 • 104° 36' 6' W ra, 11/15/2017 Page 1 of 3 1C° 11' 55' N Soil Map —Weld County, Colorado, Southern Part MAP LEGEND Area of Interest (AO!) Area of Interest (AO!) Soils Soil Map Unit Polygons Soil Map Unit Lines Soil Map Unit Points Special Point Features X x w. O A. V r; Blowout Borrow Pit Clay Spot Closed Depression Gravel Pit Gravelly Spot Landfill Lava Flow Marsh or swamp Mine or Quarry Miscellar' eo;:s Water Perennial Water Rock Outcrop Saline Spot Sandy Spot Severely Eroded Spot Sinkhole Slide or Slip Sodic Spot 0 as Spoil Area Stony Spot Very Stony Spot We. Spot Other Special Line Features Water Features Streams and Canals Transportation Rails Interstate Hightrlays US Routes Major Roads Local Roads Background 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 protection, which preserves direction and shape but distorts distance and area. A projection that preserves area, such as the Albers equal-area conic protection, should be used if more accurate calculations of d i stance 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 16, Oct 10, 2017 Soil map units are labeled (as space allows) for map scales 1:50,000 or larger. Date(s) aerial images were photographed: Jul 17, 2015 —Sep 22,, 2016 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. a, sDA Natural Resources Conservation Service Web Soil Survey National Cooperative Soil Survey 11/150017 Page 2 of 3 Soil Map —Weld County; Colorado; Southern Part Map Unit Legend Map Unit Symbol Map Unit Name Acres in AO1 Percent of AOI 19 Colombo clay loam, 0 to 1 percent slopes 127.3 63.5% S5 Loup-Boel loamy sands, 0 to 3 percent slopes 0.6 0.3% 51 Otero sandy loam, 1 to 3 percent slopes 6.9 3.4% 69 Val ere( sand, 0 to 3 percent slopes 23.7 11.9% 72 Vona loamy sand; 0 to 3 percent slopes 25.5 12.7% 73 Vona loamy sand, 310 5 percent slopes 16.6 8.3% Totals for Area of Interest 200.5 100.0% Natural Resources Web Soil Survey Conservation Sen/ice National Cooperative Soil Survey 11/15/2017 Page 3 of 3 Appendix D Calculations Peak Discharge Using UDFCD's UD-WORKBOOK UD-RATIONAL 2.00.xlsm Calculation of Peak Runoff using Rational Method a 'i C C IT C C C a L C G C L Viiirsion 2 00 released relay 2x17 C' iT . F.�ird ill lrrterlSity EquStion COCfflc €irty •L • C 1: r: x y r_. c. L L C 4-4 9 C MI G O E ` s -J LI in ci E. s n n a , :.: v T._ ,; - 07I .-, o CC i-' r L Y Li _•1 '1 L '• ' y ;1 F- 4..ut . h- al t rt: LC, '0 r- -J C: c^ V i.? Rainfall Intensily I f inch r) . 4} : Ir.' r :, .7 o ,-J v ^1 I.•. :.1 T • r_ .- ..� N ii - .. ICS ., Y y0- ^1 • ,•i .;v 0- L 4l :D I-• C.: r ID 'C ,- 6 In ru Sl 1- 1 • L': r Timm of C:•ncn1 nkion ❑ C u'E J -‘0- fa 7i :p I._ •_J r-' n --- C o UE - i -, ;a r- t J - C O. C 6 U ti :v J r r- - "v , n • I- i.rG CI E. _ - T hi u C C n L J a' .14 E Q• r F - IL b .. C. IT C. al _ L_ T . 8V a. n C ? C•_ ' O > r LL i`i r: EP C Y 8 �. x p CC ?' o ' CLi- r,. LT ., c. 4[ _ ',aE - 4 a, =' o C au to O 07 U IL o: •C •.. of - ❑ P m L i v,_ W '~S N 0 C cs 1 I° C u .Y •. W c q 0- 5 3• m C CJ- .c i1 LL _ L; _ of E P i LL n C C n u a Flory Tine t (rainI III ,- 74 .-.j ... 4 •P -C CL -_,- E OC Q 0 lh Li- o- L: :. ❑ p a. n c 1 C _ W n eh= 0 VIS Elevation t�E (Optional) G• I- _i -a d• - 0 O IL — J Runoff Coefficient. C V - -•1 _ U.7 0 - - hEJ1 o 41 a. N r 0- 7,4 I.A. _ i L }, N - - r` 47. Prrccnl Imparti041rness r, iJ •r . v a .n g c ` C7 Z C ?• P = co .'- .Y .- c.j -1 .- r - =. r c s ; LI .D in l L'. ML Y :-,1- = ri s -n - <I a' - i s - Extended Detention Basin Using UDFCD's UD-Detention v3.07.xlsm DETENTION BASIN STAGE -STORAGE TABLE BUILDER UD-Detention, Version 3.07 (February 2017) Project DiscoveryOil Terninal, War! County Basin ID: 5torrrvrratar Basin worst I w,aJ wyT rF rr— -t. ft+l. — i.ra i uai . • arrc+r et It Example Zone Configtration (Retention Pond) Required Voltrne Calcubtion Selected BMP Type = 1Waletsh=d Area = Watershed Length = Watershed Slope = Watershed Imperviousness = Percentage Hydrologic Sail Group A. = Percentage Hydrologic Soil Group B = Percentage Hydrdcgic Soil Groups C7D = Desired '.WQCVDrain Tirne= EDB 120} 1 416. 0.00. 3a.ern; 1 cart`:. 0.0!::, 40.0 Location fa 1 -1w Rainfall Depths = User Input Water Quality Capkire 1/duffle (:WQCV; = Excess U -tan Runoff Volume (EURV; = 2-yr Runoff Volume (P1 = 0.85 in. ) _ $ w Runoff Volume (P1 = 1.12 in.; = 10-yr Runoff Voume (P1 = 1.4 in.; = 2yyr Runoff Volume (P1 = 1.84 in.; = 5C-yr Runoff +idum a (P1 = 224 in. ) _ 1 0C-yr Runoff Volume (P1 = 268 in.; = 5CO-yr Runoff Volume (Pt = 3.9 in.; = A{proxiniale 2-yr Detention Volume = Actroxiniale 5-yr Deltntion Volume = A{.pproromale 10-yr Detention Volume = Approximate 25-yr Detention Volume = Approximate 50-yr Detention Volume e = Approximate 1C0-yr Detention +rdurne = Stage -Storage Calcubtion Zone 1 Vdurrle (LWQCV) _ Zone 2 Vdurue (EURV - Zone 1; = 20t19 .3 Vdurn e (1 CC -year - Zones 1 & 2; = Total Detention Basin Volume = Initial Surcharge Volume (ISV; = Initial Surcharge Depth (ISO; = Tolal A.eeilatls Detention Depth (H,,,,.1; = Depth of Trickle Channel (H1-) _ Slope of Trickle Channel (Sid = Slopes of Main Basin &des (Sii,.iii; = Basin Leriglh4c .'4/idlh Ratio (Ri.,... ; _ niG21 Surcharge Area Surcharge Volume Length (U,5„,J = Surcharge'Ili:Arria '(Width (Viii •.J = Depth '1 Basin Floor (Hnr,oR) Length of Basin Floor (Lnr.•oR) idlh of Basin Floor (Viii ,oR) r'rea of Basin Floor (4,,-woR) Volume of Basin Floor (VaDoR) Depth or Mein Basin (Hrralnj = Length of Main Basin (Lf1.14] Width of Main Basin (Wp..-4,41 Area of Main Basin (4- J = Volume of Main Basin (Vrr.an) Calculated Total Basin Volume 0 162 0.284 0.184 0.256 0.246 0.524 0.780 1.135 2 157 0 172 0.240 0.322 0 468 068 0761 0.114 0.222 0.37?, 0.761 21 0.33 3.50 0.5C. 0.0)4 .1 3 64 8.0 8.0 0.74 156.1 70.0 1a715 3648 1.93 207.7 81.5 16.928 29.466 0.761 acres a nrn percent percent percent percant hours acre -feel acre -feel acre-feet acre -feel acre -feel acre -feel acre-feet acre -feel acre -feel acre -feel acre-feet acre -feel acre -feel acre -feel acre -feel acre -feel acre -feel acre -feel acre -feel 013 ft ft a t1.11. a^2 a a a a a a^2 a" ft ft ft (1/13 acre -fret Optional User Oyer ride 14w Preci{.+ila ion 0.85 1.12 1.40 1.84 224 2 6? ago inches inches inches inches inches inches inches Depth Increment = 0 5. IL Stage - Storage Description Stage (R; Opbonal Oi,Hrnde Stage (fl; Length (R; Width (fl; Area (f'-2; Optional Overriiie Area (R'•2; Area (acre; Volume (f1•.3; Volume (ac -R; Top (it PAi'cropool 0.00 &') 8.0 64 0.001 ISV 0.33 8.0 8.0 64 0.001 20 0.CC0 0.50 5.0 8.0 64 0.001 31 0.001 1.00 48.5 213 1.034 0.024 127 0.003 1.50 1754 53.0 11.023 0.253 2702 0.062 Floor 1.57 155.2 69.7 13.600 0.312 3.[85 0.C€5 Zona 1 (INCICV) 1.8 2 197.6 71 4 14.115 0.324 7 163 0.164 2.00 198.6 72.5 14.320 0.330 9 586 0.220 Zone 2 (EURV) 2.48 201.5 75.4 15.156 0.349 16.823 0.226 2.50 201 7 75.5 15.229 0.350 17.128 0.393 3.00 2C4.7 78.5 16.069 0.369 24.261 0.573 Zone 3 ('IOO-year) 3.50 207.7 81 5 16.54.8 0.329 33.210 0.762 4.00 210.7 24.5 17.204 0.40€ 41.892 0.262 4.50 213.7 87.5 18.625 0.429 51.017 1.171 5.00 216.7 50.5 19.612 0.450 60.52.4 1.39.1 5.50 219.7 93.5 20.542 0.472 70.632 1.621 6.00 222.7 96.5 21.451 0.493 81.139 1.863 6.50 225.7 99.5 22457 0.516 52-126 a115 7.00 228.7 1025 2a442 0.538 103.5 59 2378 7.50 2317 105.5 24.444 0.561 115.570 2653 8.00 224.7 108.5 25.53 0.585 128.047 2940 8.50 237.7 111.5 26.503 0.6C8 141 038 3.228 9.00 240.7 1145 27.560 0.633 154.553 3548 9.50 243.7 117.55 28.624 0.657 168.601 3.871 10.CO 246.7 120.5 29.727 0.682 123.120 4.206 10 52) 249.7 1235 30.837 0.708 198,331 4.553 11 CO 252.7 12•.5 31.216 0.734 214.031 4.913 11.5) 255.7 129.5 33.113 0.760 220 300 a 22.7 12 CO 258.7 1325 34.277 0.787 247 146 5.674 125.0 261 7 1355 35.60 0.814 2134.580 6.074 13.10 264.7 128.5 36.660 0.842 222.6 09 6.428 135-•0 25.77 141.5 37.875 0.870 301,243 E916 14.00 270/ 144.5 39.115 0.851 320 491 7.367 14..60 273.7 147.5 40.370 0.527 3400 361 7.814 15.00 276.7 150.5 41.642 0.556 260 863 8.224 2_UD-Oetorbon_v307.xlsni. Basin 11721 2017. 7:20 AM DETENTION BASIN STAGE -STORAGE TABLE BUILDER UD-Detention, Version 3.07 (February 2017) 28D 210 70 _ter 400 WW1 Slap (ft) taegth(ft) Width (ft) Area (sq,ft,) 1244 L2UDD 31504 21000 1osuU U 16W h U. %U K.3UU U. 12U Vol 6.225 rti 4.16U I U.L8U V € 0 } D.240 2.0 IS U. UUU 4.40 4110 8.04 Stage —Area (acres) 12,00 (n.) —'Volume (ac -ft) 0.UUU Imo 2_UD-Detenlion _v3.07.xism. Basin 1 V21 2017, 7:30 AM et Structure Design Detention Basin Out VO-detention, Version 3-47 (Fetsruary 2017) Discovery Oil Terminal. Weld County Iona Volume (ate) C P C•ilitr.Plate C•ilithPLite n Ts O 3 r 0 ri Zone 1(WQCV) t Zone 2 [EuRV) alt Zone 34100 -year) Example Zone Configuration (Retention Pond) calculated parameters for underdraln ally used to drain WQGV In a filtration GIMP) eu cC U kidruinO.i(itx:Area= 1.(diswnt_• hcicw the liWarw. rne.iicl su•i Uncle rcra'n CrificeCentr•id N dl u r III Undardrain Office Diameter Calot4atcd Pammotcrs for Plate User Input; Orifice Plate with one or more orifices or Elliptical Slot Weir {typically used to drain WQCV and/or EURV in a sedimentation MP) a M w 1u n m 7 7 z 14rQ Orfice A"ea per tcw II II C CO 7C ' LI 1 •••• O 4J I, r J et. ,l' — V a . w ? U 8 Q sq. inches (diameter O 7 I -Vert of Lowest Of Lice ue:rtb at rip of tare t.;irg Orifice Plate = U ser Input, Stage and Total Area of Each Orifice Row (numbered from lowest to highest) Row 61,opton9 ) Row ?4optionsll Rawl"' (ap:icral) Row G Iopiic nl Rryn a (optional:. r Row .'. (opt one ) C, 0 Row 2 toptionafi Co U Roar 1 (recuired) Row le (optional) Raw1t3 loatons Row II .:optionslj ,p C a a [rt re Q Row 2 (op:icral) Roth 11 (aptiooel'•• Row 1r] (optional:. Row 0 {optional) Oriluu Arco {o -x. i tetras) Calculated Parameters for Vertical Orifiot: User Input; Vertical Orifice (Circular or Rectangular) Not Selected ,1. C Not Selected G Cr 7 Vertical CIifiux Gerilrc:id = z' Not Selected Not Selected C cc 1 hnee•=cf Veto -al Drfirm = II J d G, E J L 4 -'• al 7.1 fl Not Selected z G z z Zone 3 Weir J r.. W ...i fl d n � Oy -a Height at Grate Uppe• Edge, H. II r 11 C 3 `• c a crt L } 0 7.2 .2 k• 2 a Not Selected �`�= --x4 z z z c z z es VI w t In r. I'- ri CI cf r N. 0: Ln A Calculated Parameters forOutict Pinew/ Flow Restriction Plate es 8 C. J User Input; Outlet Not Selected $ a Q CC Zone 3 Circular r• O s 7 cit.tlet <)rifintz Brea = Not Selected OcLb( Minix Curllrvid = Zone3 Circular 0 i Halt-Cen:ral Angle of Restricto• Plate on Pi ]e User Input: Emergency Spillway (Rectangular or Trapezoidal) ri C Ras'inAn;cra(Top of rred)oeud= t 0 0 IM 8 Frccboarc above Max Water Surace= P. ro W u1 O M �1 N L9 ei N ti 1'+ L-, C, N 1^ f1 -: r l: ,._ ` z Ti. c7 .-I a h b 10 s-vij y f?� c' in (II .-I LI) rlon- IA L; to r- u�. = ., sl.!h I: rU. 7r •cri J 4 N } a '.;I ni eaaO 6 W ci,:; y N NI N 90 r I ...R l{ Lv 1`.Inte 1 ^ e: I C4 J] -.'�., "� M r�v1 r7 N �: 25 Year My . 1 1 G7 m~ -'I a 4 C' m G N 3Y tr. L^ r Q• n .. c G a C n` '-' Z nl i '4' n N •'rrjl • 4 4 lc, 71 0Vt Lm] fel • C": L3 1+Y '..r' ". • S Z Z 70 !Y o{ LID III W~ . NI a IN o' C. n 17 O •- L7 o r 4 r Z `� Z 17,1 r 0. 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IX 6 V V Y: I' I I fj J ¢ 12 • r I 4 4^ r H [3}] Riad 4NtQNOd ti n 0 r DRAIN TIME Ihrl r4 0 "I [SPI M0ld.U1O c o ri C c o c o c. a 0 rr 0 0 i K S J!. m Y -. ,. I C a .1. -a c- J D = W ? in C .- I r a I I n 0 0 n r. r. 0 c c 0 C G d c r' h C Y5 M •r. (4 0 N G Kali 3vlmoA'[Zvll] VW/ 0 n o 0 IG ri 0 -y 0 I 0 10 0 N 0 PONDING DFP i [ft] naxircum aaurd Detention Basin Outlet Structure Design UD-Detention, Version 3.07 (February 2817) Storm Inflow Hydragraphs E C71 r. a aG 7C • 171 -c a C 7• co.; -c n a cc rn C C C L 11 E C -C aG tDl C I r. d L G1 ICS r. C a L H r I" Y - 3 ir; n O !'1.7; C. O O O . r 6-4O- y -i « n- O 7 M w1 4 ry et; r '-ll , -7,.- g c"' C1 '' .O V :13 -0 ri N R1 .ha A J7 . l? N f.1; rl 'a IP .a I -.J1 . 1 T n C.1 <} n` •C n: 1 00n 11 'f r- e 11 r. r.1 J r,l 11 VOW -� a. .. - LC...: ^ 11-1 rI • K - ,.. .' 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J7 Time ntQr:al Discharge Pipe Capacity Verification Using UDFCD's UD-Culvert v3.04.xlsm CIRCULAR CONDUIT FLOW (Normal & Critical Depth Computation) Project: Discovery Oil Terminal, Weld County Pipe I D : Storm water Basin Discharge Pipe r Design Information ,(Input) Pipe Invert Slope Pipe Manning's n -value Pipe Diameter Design discharge So = n= D= _ 1 0.0038 a 0.0130 18.00 5.20 ft/ft inches cfs Full -flow Capacity ,(Calculated) Full -flow area Full -flow wetted perimeter Half Central Angle Full -flow capacity Calculation of Normal Flow Condition Half Central Angle (OcTheta<3.14) Flow area Top width Wetted perimeter Flow depth Flow velocity Discharge Percent Full Flow Normal Depth Froude Number Calculation of Critical Flow Condition Half Central Angle (0cTheta-c<3.14) Critical flow area Critical top width Critical flow depth Critical flow velocity Critical Depth Froude Number Af = Pf= Theta = Qf - Theta = An = Tn = Pn = Yn Vn = Qn Flow = Fri, Theta -c = Ac = Tc = Yc = Vc = Fr, 1.77 4.71 3.14 6.47 1.94 1.28 1.40 2.91 1.02 4.07 5.20 80.4% 0.75 1:.74 1.07 1.48 0.88 4.84 1.00 sgft ft radians cfs radians sgft ft ft ft fps cfs of full flow subcritical radians sgft ft ft fps 3_UD-Culvert v3.04.xlsm, Pipe 11/20/2017, 6:28 PM Determination of Culvert Headwater and Outlet Protection Project: Discovery Oil Terminal, Weld County Basin ID: Stormwater Basin Discharge Soil Type: Choose One: _ O Sandy O Non -Sandy Design Information (Input): Design Discharge Circular Culvert: Barrel Diameter in Inches Inlet Edge Type (Choose from pull -down list) BoxCulvert: Barrel Height (Rise) in Feet Barrel Width (Span) in Feet Inlet Edge Type (Choose from pull -down Number of Barrels Inlet Elevation Outlet Elevation OR Slope Culvert Length Manning's Roughness Bend Loss Coefficient Exit Loss Coefficient Tailwater Surface Elevation Max Allowable Channel Velocity ist) = 5.2 �cfs D= Square End with Headwal I 18 V Height (Rise) Width (Span) OR No = Elev IN= So = L= n= kb _ kY = Elev Yt = V= 1 4799.5 0.0038 38 0.012 0 1 5 inches ft ft ft ft/ft ft ft ft/s Required Protection (Output): Tailwater Surface Height Flow Area at Max Channel Velocity Culvert Cross Sectional Area Available Entrance Loss Coefficient Friction Loss Coefficient Sum of All Losses Coefficients Culvert Normal Depth Culvert Critical Depth Tailwater Depth for Design Adjusted Diameter OR Adjusted Rise Expansion Factor Flow/Diameter2 5 OR Flow/(Span * Rise, 5) Froude Number Tailwater/Adjusted Diameter OR Tailwater/Adjusted Rise Inlet Control Headwater Outlet Control Headwater Design Headwater Elevation Headwater/Diameter OR Headwater/Rise Ratio Minimum Theoretical Riprap Size Nominal Riprap Size UDFCD Riprap Type Length of Protection Width of Protection Yt = At = fl_ ke kt = ks = Yn Yc= d= Da 1 /(2*tan (0)) = Q/D^2.5 Fr= Yt/D = 0.60 1.04 1.77 0.50 0.59 2.09 0.96 - 0.88 1.19 5.87 1.89 0.84 0.40 HW, _ HWe = HW =, 1.33 1.33 4,800.83 HW/D 0.89 d= _ Type L P T= 2 6 VL 5 3 ft ft ft2 ft ft ft ftu.5/s ft ft in in ft ft Channel Sizing Using Bentley FlowMaster Worksheet for Offsite Conveyance (West Channel) Upstream - low n Project Description Friction Method Solve For Manning Formula Normal Depth Input Data Roughness Coefficient Channel Slope Left Side Slope Right Side Slope Bottom Width Discharge 0.020 0.00600 ft/ft 4.00 ft/ft (H:V) 4.00 ft/ft (H:V) 2.00 ft 0.88 ft3/s Results Normal Depth Flow Area Wetted Perimeter Hydraulic Radius Top Width Critical Depth Critical Slope Velocity Velocity Head Specific Energy Froude Number Flow Type Subcritical 0.19 ft 0.54 ft2 3.61 ft 0.15 ft 3.56 ft 0.16 ft 0.01169 ft/ft 1.63 ft/s 0.04 ft 0.24 ft 0.73 GVF Input Data Downstream Depth Length Number Of Steps 0.00 ft 0.00 ft 0 GVF Output Data Upstream Depth Profile Description Profile Headloss Downstream Velocity Upstream Velocity Normal Depth Critical Depth Channel Slope Critical Slope 0.00 ft 0.00 ft Infinity ft/s Infinity ft/s 0.19 ft 0.16 ft 0.00600 ft/ft 0.01169 ft/ft 11120/2017 6:30:30 PM Bentley Systems, Inc. Haestad Methods Solution Cenaentley FlowMaster V8i (SELECTseries 1) [08.11.01.03] 27 Siemons Company Drive Suite 200 W Watertown, CT 06795 USA +1-203-755-1666 Page 1 of 1 Worksheet for Offsite Conveyance (West Channel) Upstream - high n Project Description Friction Method Solve For Manning Formula Normal Depth Input Data Roughness Coefficient Channel Slope Left Side Slope Right Side Slope Bottom Width Discharge 0.035 0.00600 ft/ft 4.00 ft/ft (H:V) 4.00 ft/ft (H:V) 2.00 ft 0.88 ft3/s Results Normal Depth Flow Area Wetted Perimeter Hydraulic Radius Top Width Critical Depth Critical Slope Velocity Velocity Head Specific Energy Froude Number Flow Type Subcritical 0.26 ft 0.80 ft2 4.17 ft 0.19 ft 4.10 ft 0.16 ft 0.03577 ft/ft 1.10 ft/s 0.02 ft 0.28 ft 0.44 GVF Input Data Downstream Depth Length Number Of Steps 0.00 ft 0.00 ft 0 GVF Output Data Upstream Depth Profile Description Profile Headloss Downstream Velocity Upstream Velocity Normal Depth Critical Depth Channel Slope Critical Slope 0.00 ft 0.00 ft Infinity ft/s Infinity ft/s 0.26 ft 0.16 ft 0.00600 ft/ft 0.03577 ft/ft 11120/2017 6:30:48 PM Bentley Systems, Inc. Haestad Methods Solution Cenaentley FlowMaster V8i (SELECTseries 1) [08.11.01.03] 27 Siemons Company Drive Suite 200 W Watertown, CT 06795 USA +1-203-755-1666 Page 1 of 1 Worksheet for Offsite Conveyance (West Channel) Downstream - low n Project Description Friction Method Solve For Manning Formula Normal Depth Input Data Roughness Coefficient Channel Slope Left Side Slope Right Side Slope Bottom Width Discharge 0.020 0.00140 ft/ft 4.00 ft/ft (H:V) 4.00 ft/ft (H:V) 10.00 ft 0.88 ft3/s Results Normal Depth Flow Area Wetted Perimeter Hydraulic Radius Top Width Critical Depth Critical Slope Velocity Velocity Head Specific Energy Froude Number Flow Type Subcritical 0.12 ft 1.31 ft2 11.03 ft 0.12 ft 11.00 ft 0.06 ft 0.01492 ft/ft 0.67 ft/s 0.01 ft 0.13 ft 0.34 GVF Input Data Downstream Depth Length Number Of Steps 0.00 ft 0.00 ft 0 GVF Output Data Upstream Depth Profile Description Profile Headloss Downstream Velocity Upstream Velocity Normal Depth Critical Depth Channel Slope Critical Slope 0.00 ft 0.00 ft Infinity ft/s Infinity ft/s 0.12 ft 0.06 ft 0.00140 ft/ft 0.01492 ft/ft 11120/2017 6:31:22 PM Bentley Systems, Inc. Haestad Methods Solution Cenaentley FlowMaster V8i (SELECTseries 1) [08.11.01.03] 27 Siemons Company Drive Suite 200 W Watertown, CT 06795 USA +1-203-755-1666 Page 1 of 1 Worksheet for Offsite Conveyance (West Channel) Downstream - high n Project Description Friction Method Solve For Manning Formula Normal Depth Input Data Roughness Coefficient Channel Slope Left Side Slope Right Side Slope Bottom Width Discharge 0.035 0.00140 ft/ft 4.00 ft/ft (H:V) 4.00 ft/ft (H:V) 10.00 ft 0.88 ft3/s Results Normal Depth Flow Area Wetted Perimeter Hydraulic Radius Top Width Critical Depth Critical Slope Velocity Velocity Head Specific Energy Froude Number Flow Type Subcritical 0.17 ft 1.86 ft2 11.43 ft 0.16 ft 11.39 ft 0.06 ft 0.04563 ft/ft 0.47 ft/s 0.00 ft 0.18 ft 0.21 GVF Input Data Downstream Depth Length Number Of Steps 0.00 ft 0.00 ft 0 GVF Output Data Upstream Depth Profile Description Profile Headloss Downstream Velocity Upstream Velocity Normal Depth Critical Depth Channel Slope Critical Slope 0.00 ft 0.00 ft Infinity ft/s Infinity ft/s 0.17 ft 0.06 ft 0.00140 ft/ft 0.04563 ft/ft 11120/2017 6:31:51 PM Bentley Systems, Inc. Haestad Methods Solution Cenaentley FlowMaster V8i (SELECTseries 1) [08.11.01.03] 27 Siemons Company Drive Suite 200 W Watertown, CT 06795 USA +1-203-755-1666 Page 1 of 1 Worksheet for Pond discharge conveyance - low n Project Description Friction Method Solve For Manning Formula Normal Depth Input Data Roughness Coefficient Channel Slope Left Side Slope Right Side Slope Bottom Width Discharge 0.020 0.00700 4.00 4.00 20.00 5.20 ft/ft ft/ft (H:V) ft/ft (H:V) ft ft3/s Results Normal Depth Flow Area Wetted Perimeter Hydraulic Radius Top Width Critical Depth Critical Slope Velocity Velocity Head Specific Energy Froude Number Flow Type Subcritical 0.15 3.04 21.22 0.14 21.18 0.13 0.01171 1.71 0.05 0.19 0.79 ft ft2 ft ft ft ft ft/ft ft/s ft ft GVF Input Data Downstream Depth Length Number Of Steps 0.00 ft 0.00 ft 0 GVF Output Data Upstream Depth Profile Description Profile Headloss Downstream Velocity Upstream Velocity Normal Depth Critical Depth Channel Slope Critical Slope 0.00 ft 0.00 Infinity Infinity 0.15 0.13 0.00700 0.01171 ft ft/s ft/s ft ft ft/ft ft/ft 11120/2017 6:32:24 PM Bentley Systems, Inc. Haestad Methods Solution Cenaentley FlowMaster V8i (SELECTseries 1) [08.11.01.03] 27 Siemons Company Drive Suite 200 W Watertown, CT 06795 USA +1-203-755-1666 Page 1 of 1 Worksheet for Pond discharge conveyance - high n Project Description Friction Method Solve For Manning Formula Normal Depth Input Data Roughness Coefficient Channel Slope Left Side Slope Right Side Slope Bottom Width Discharge 0.035 0.00700 4.00 4.00 20.00 5.20 ft/ft ft/ft (H:V) ft/ft (H:V) ft ft3/s Results Normal Depth Flow Area Wetted Perimeter Hydraulic Radius Top Width Critical Depth Critical Slope Velocity Velocity Head Specific Energy Froude Number Flow Type Subcritical 0.21 4.31 21.70 0.20 21.65 0.13 0.03587 1.21 0.02 0.23 0.48 ft ft2 ft ft ft ft ft/ft ft/s ft ft GVF Input Data Downstream Depth Length Number Of Steps 0.00 ft 0.00 ft 0 GVF Output Data Upstream Depth Profile Description Profile Headloss Downstream Velocity Upstream Velocity Normal Depth Critical Depth Channel Slope Critical Slope 0.00 ft 0.00 Infinity Infinity 0.21 0.13 0.00700 0.03587 ft ft/s ft/s ft ft ft/ft ft/ft 11120/2017 6:33:05 PM Bentley Systems, Inc. Haestad Methods Solution Cenaentley FlowMaster V8i (SELECTseries 1) [08.11.01.03] 27 Siemons Company Drive Suite 200 W Watertown, CT 06795 USA +1-203-755-1666 Page 1 of 1 Appendix E Maintenance Plan Daniel B. Stephens & Associates, Inc. Drainage System Maintenance Plan Discovery Midstream Partners Oil Terminal Facility Weld County, Colorado 1. Drainage System Components The stormwater drainage system includes the following components: • Grass -lined open channels • Stormwater pond and discharge structure 2. Inspections and Maintenance Activities Table 1 provides an inspection schedule for the drainage system. Table 1. Inspection for Drainage System Components Drainage System Component Inspection Schedule Vegetated areas Annually (early spring) and after heavy rains Stormwater pond discharge emergency channel, drainage swale, channel, and overflow Semiannually after (early spring and late heavy rains fall) and Stormwater pond discharge pipe Semiannually after (early spring and late heavy rains fall) and Stormwater pond Annually (late fall) and after heavy rain Stormwater pond discharge structure Semiannually after (early spring and late heavy rains fall) and Maintenance activities are listed in Table 2. Those conducting maintenance on the drainage system will fill out the inspection and maintenance log (Attachment 1). The log will record the facility inspected, corrective actions taken, the date of inspection, and the condition of the facility, and will document failing structures. The log shall be signed. P:1 DB17-13191DrainageRpt.N-171Appx E_Maintenance PIn\MP_N20.docx I Daniel B. Stephens & Associates, Inc. This log will be used to determine future maintenance intervals of structures. In addition, the log will be used to determine drainage system problems and evaluate required corrective measures. Table 2. Scheduled Maintenance and Anticipated Repairs Drainage System Component Maintenance and Repairs Vegetated areas • Inspect • Armor • Inspect • Mow vegetation all rill erosion and slopes and embankments areas with repair downslope as needed and replant riprap or divert of all spreaders the areas runoff and to turnouts of a bare stable for soil area erosion or with sparse growth Stormwater channel • Remove obstructions, • Repair any • Mow vegetated • Remove woody • Repair any • Repair riprap erosion slumping ditches where vegetation of underlying sediments, the side ditch growing slopes lining fabric or debris from ditches through riprap or gravel is showing and open channels or if stones have dislodged Stormwater discharge pond pipe • Remove accumulated • Remove any obstruction • Repair any erosion damage sediments to flow at the and debris at culvert's inlet the inlet, and outlet outlet, or within conduit Stormwater pond • Inspect • Mow • Inspect • Remove • Replace the the the embankment embankment weir for obstruction and dispose any dislodged to of stone sediments for control settlement, in woody of flow and riprap slope vegetation and structural debris spillways erosion, integrity piping, and slumping Stormwater discharge structure pond • Inspect the • Inspect the • Remove • Remove structure screen and dispose any obstruction for for broken obstruction of sediments to flow seals, obstructed of flow and debris orifices, and plugged trash racks P:1 DB17-13191DrainageRpt.N-171Appx E_Maintenance PIn\MP_N20.docx 2 Attachment I Inspection and Maintenance Log Daniel B. Stephens & Associates, Inc. Stormwater System Inspection and Maintenance Form General Information Inspector's Name(s) Date of Inspection Start/End Time Type of Inspection: ❑ Regular ❑ After heavy rain Weather Information Has there been a storm event since the last inspection? ❑Yes ❑No If Storm yes, provide: Start Date & Time: Storm Duration (hrs): Approximate Amount of Precipitation (in): Weather at time of this inspection? ❑ Clear ❑Cloudy ❑ Rain ❑ Sleet ❑ Fog ❑ Snowing ❑ High Winds Temp °F System Component Inspected Maintenance Required? Corrective Action Needed and Notes 1 Vegetated Areas ❑Yes ❑Yes ❑No ❑No 2 Stormwater Channel ❑Yes ❑Yes ❑No ❑No 3 Drainage Swale ❑Yes ❑Yes ❑No ❑No 4 Pond Discharge Channel ❑Yes ❑Yes ❑No ❑No 5 Emergency Overflow ❑Yes ❑Yes ❑No ❑No Stormwater Pond ❑Yes ❑Yes ❑No ❑No 7 Pond Overflow Weir ❑Yes ❑Yes ❑No ❑No P:1 DB17-1319\DrainageRpt.N-17\Appx E Maintenance PIn1Att 1_Lag.docx r,0b4—tzg (sas) bolts FIN not filDrO COL aims .3N Aracrav 0'7..08 S1133NI;MC3 ?4 SI-SLLN31MS 1VIN3YINONIML3 t l/t414 L31Vt1 A :ii a3:1O3NA S '19 NI JO r =h8 CI3NSIS30 O T Z o co r a LS; 0 w z Lu sly Sa4A34iddr—Pldld 31$ MillgrUiSALANI I --a :3I,N 711 34TH NCISV+3a An 31~10 ON 0 W W DATING OTLTOURS O h PROPERTY LINE PRQPQOED EASEMENT SECTION UNE DOSTING EASEMENT PARCEL BOUNDARY FLCODPLAIN UNE .r W'ASPIOUT AREA z 4 } r1 2 S r / / %Jl id —l7. /fr 11 CO La i if i / / LD LW _ , Na.,---- Qr 4rr x� �� C W W 13- N a LL 0 G] --- €084 ~--- et4t. r4 z WI —9 oaf 2�� i We — x- ~Zd f�=9SI z \ �� $o ti -+r-x �r�• 4807 ci.x ..c—--�.t� — ar �f -" 55. / \ I " .„` f`! / 1 / I I 1 -- -- (- III / / I / L � / I / I -1^ a 4 N N -e ; O ;I aiiala*1J-11i'1d 3116 M LattLSWINI LYIIIAM I WA'S rwae—me (sas} 6o1Ls FIN nfUalf7QPi9'Td COL aims '3N moony arrer S1133NI$N3 SLSLLN3IQG 1d1N3FINQNV •arq •sa0Taassy= :g gaarjt:ra } q papitiOg L L/LLtO L31Vt1 r :JA 03103NO S '19 NI JO r :AB fl3N9b38 SlIV13❑ 3 Jfll3fl 1caiNI UBIV LNHOIS 'aribaaribnalv �Z'o'IdYII� L V=s2gaa 2 r c> C doio:Ndld 31$ 3't1WM1?ULSALANt G —a :3I,N 711 WIN NOM V+3N ,LB 31~10 ON OM'Nd1d 3116 3JrtLatA1LSk4IJNi L-5\}lOILMOCOldMOvr* IHlIIL1I6—A2I3M3Siriacr8l£L`LLBdkSid3rOFJd\'S DISC VERY MIDSTREAM PARTNERS OVERVIEW TRAFFIC MEMO This traffic memo is prepared to accompany the USR permit application for the Discovery Oil Terminal project by Discovery Midstream Partners. The subject site is located south of WCR 30, 03 miles west of the intersection with WCR 49. This memo provides an overview of the tong term traffic associated with the proposed use. A full Transportation Impact Study will not be necessary as the expected traffic to the site will be fewer than 21 trips per day or 7 trucks per day. If the expected traffic for the site increases in the future, the -NS will be completed at that time. BACKGROUND Access to the site is located on WCR 30 via an existing access to a facility north of the parcel under development. The site is 0.5 miles south of WCR 30. The access point is paved for several hundred feet and will be graveled the remaining distance to the site. WCR 30 is paved and has one lane in both directions. The use of this site consists primarily of oil storage prior to delivery to the White Cliffs facility, located to the north. There will be an office building on site with 1-2 part-time employees. These uses are proposed and will not be constructed until a proposed Use by Special Review application is approved. TRAVEL ROUTES/DI STRI B UTI ON This memo assesses current traffic generation associated with the proposed site operations. Traffic will access the site from Weld County Road (WCR) 30. Vehicles can approach from the west on WCR 30 or from the east on WCR 49, WCR 30 and 49 are asphalt paved roads, The site access from WCR 30 will be a gravel road after the first 0.25 miles which is currently paved. I.. Access Route 1 a. From Hudson, CO, take Interstate 76 Frontage Rd. NE b. Turn North onto County Rd 49 c. Go approximately 7 miles due north d. Turn West onto County Rd 30 e. In 05 miles, take the access road south, just past the White Cliffs Facility f. The new terminal will be 0.67 miles down the access road 2. Access Route 2 a. From County Rd 43, turn east onto County Rd 30 b. Travel approximately 2.5 miles along County Rd 30, take the access road south, just past the White Cliffs Facility c. The new terminal will be 0.67 miles down the access road The access routes above will distribute expected traffic 50% from Access Route 1 and 50 from Access Route 2. Discovery proposes improvements to the existing access including graveling, sediment tracking, and a large radius (60') turn onto the property TRIP GEN ERATION/TI Nu NG Construction Traffic The following vehicle summaries have been used to determine the anticipated traffic generation numbers: • Passenger Cars/Pickups — 40 workers (2 workers/vehicle), 20 round trips/clay • Equipment Delivery Trucks/Heavy Machinery -- 5 round trips per day DISC 0 VERY MIDSTREAM PARTNERS Operation Traffic TRAFFIC MEMO The following vehicle summaries have been used to determine the anticipated traffic generation numbers: • Passenger Cars/Pickups a 2 part time employees, 2 trips per day It is expected that the majority of the passenger car/truck traffic tea/from the site will occur between 7 a‘m. and 7 p4m. MEMORANDUM TO: PRE 17-0172; Case File, pre -application DATE: June 22, 2017 FROM: Kris Ranslem, Planning Technician SUBJECT: Pre -Application Meeting prior to submitting USR for crude oil terminal Attendees: Manya Miller, Discovery DJ Services Matt Herrera, Applicant Lito White, Applicant Mark Skelskey, Samuel Engineering, Mike Fortney, Samuel Engineering Pamela Bland, Building Kim Ogle, Planning Hayley Balzano, Engineering Kris Ranslem, Planning Evan Pinkham, Public Works On Thursday, June 22, 2017 an informal discussion took place at the Greeley Administrative Offices Conference Room regarding a proposed oil terminal. (The legal description is E2 Section 25, T3N, R65W of the 6t" P.M.) Background Information: The applicants are proposing a crude oil terminal consisting of a single 100,000 barrel crude oil storage tank, inlet/outlet metering and booster pumps. The crude oil will be brought to the facility via a new 12 inch crude oil pipeline, metered, stored on site then pumped off site via a 12 inch crude oil pipeline. A potential future expansion would include additional crude oil tanks, break-out tanks, 100 foot communications tower, loading bays, and an operations/warehouse building used for operations personnel and parts/equipment storage. The facility will be operated 24/7. There will be two (2) part-time employees visiting the site daily. Building Department Building Permits will be required, per Section 29-3-10 of the Weld County Code. Currently the following has been adopted by Weld County: 2012 International Codes; 2006 International Energy Code; 2014 National Electrical Code. A building permit application must be completed and two complete sets of engineered plans bearing the wet stamp of a Colorado registered architect or engineer must be submitted for review. A geotechnical engineering report or an open -hole inspection report performed by a registered State of Colorado engineer may be required for new structures and or additions. Manufactured specifications on the crude oil tanks as well as engineered plans for foundations will be required. Electrical Permits will be required and the applicants can submit for each individual piece or submit site electrical. One -line diagram, Fault Current Calculations and Area Classification Maps will also be required. Staff provided suggestions of what items to include on building permits. Pre -Manufactured non-residential structures may be required to comply with state Resolution 35. A Fire District Notification letter may be required and shall be submitted with Commercial Permit applications. All building permit requirements can be found on the Weld County web -site: www.weldgov.cam/departments/building/building permit/permit applications/. Health Department Staff was unavailable; however please contact Lauren Light at 970-400-2211 for further direction. Waste handling: Waste materials shall be handled, stored, and disposed in a manner that controls blowing debris, and other potential nuisance conditions. The applicant shall operate in accordance with Chapter 14, Article 1 of the Weld County Code. Please answer the following if applicable; indicate if there will be washing of vehicles or equipment, fuel storage, maintenance of vehicles or equipment, floor drains in shop, air emissions permit. Onsite dust: Fugitive dust should attempt to be confined on the property. Uses on the property should comply with the Colorado Air Quality Commission's air quality regulations. Sewage disposal information: Include in application how sewage disposal will be accommodated. If using a septic system provide a copy of the septic permit. Either utilize the County website www.co.weld.co.usimaps/propertyportal/ or call (970-304-6415) or stop by EH front counter and request a copy. Potable water information: Include in application how potable water will be provided. Provide a will serve letter or water bill from the water district or provide a copy of well permit. Portable toilets and Bottled water can be used for employees and customers per policy below: TO DEFINE WHEN PORTABLE TOILETS AND COMMERCIALLY BOTTLED WATER ARE ALLOWED Purpose: To define when portable toilets and commercially bottled water are allowed. Policy: Bottled water from a commercial source is allowed in the following circumstances: 1. Temporary or seasonal uses that are utilized 6 months or less per year (for example recreational facilities, firework stands, farmers markets ) 2. Gravel mines 3. 10 or less customers or visitors per day And/or one of the following: 4. 2 or less full time (40 hour week) employees located on site 5. 4 or less part time (20 hour week) employees located on site 6. Employees or contractors that are on site for less than 2 consecutive hours a day Policy: portable toilets are allowed in the following circumstances: 1. Temporary or seasonal uses that are utilized 6 months or less per year (for example recreational facilities, firework stands, farmers markets ) 2. Gravel mines 3. 10 or less customers or visitors per day And/or one of the following: 4. 2 or less full time (40 hour week) employees located on site 5. 4 or less part time (20 hour week) employees located on site 6. Employees or contractors that are on site for less than 2 consecutive hours a day Public Works County Road 30 is a paved road and is designated on the Weld County Functional Classification Map (Code Ordinance 2017-01) as a(n) collector road, which requires 80 feet of right-of-way. The applicant shall delineate on the site map or plat the future and existing right-of-way. If the right-of-way cannot be verified it shall be dedicated. Pursuant to the definition of setback in the Weld County Code, Chapter 23, Article III, Section 23-3- 50, the required setback is measured from the future right-of-way line. Be aware that physical roadways may not be centered in the right-of-way. This road is maintained by Weld County. County Road 49 is designated on the Weld County Functional Classification Map (Code Ordinance 2017-01) as an arterial road, which requires a minimum of 140 feet of right-of-way, or 180 feet of right-of-way in some locations. Weld County is currently in the process of widening this corridor, which is anticipated to be completed at the end of 2017. Contact Public Works for the location of the current right-of-way alignment and easements so they can be delineated accurately on the map. If the right-of-way cannot be verified it shall be dedicated. All setbacks shall be measured from the edge of future right-of-way. Pursuant to the definition of setback in the Weld County Code, Chapter 23, Article III, Section 23-3-50, the required setback is measured from the future right-of-way line. This road is maintained by Weld County. Weld County will not replace overlapping easements located within existing right-of-way or pay to relocate existing utilities within the County right-of-way. ACCESS Table 12A.2 Minimum Access Spacing Criteria (Feet Access Element Arterial Collector Local Distance between Signalized Unsignalized intersections 2,640 1,320 N/A 1,320 N/A 330 Distance between accesses and intersections 660 660 330 Distance between access points 660 330 150 Distance between access points in subdivisions 660 330 75 Per Chapter 12, Article 5, Section 12-5-30, an Access Permit is required for access to Weld County maintained roadways. We strongly encourage you to discuss your access with public works prior to laying out your site plan to ensure the approved accesses are compatible with your layout. For new accesses and/or change of use of an existing access, the fee and photos are required (photo looking left and right along roadway from the access point and looking in to and out of the access point). These photos are used to evaluate the safety of the access location. Access permit instructions and application can be found at https://www.weldgov.com/departments/public works/permits/. Chapter 6, Sections 6.3, 6.4 and 6.5 of the Weld County Engineering and ConstructionCriteria offer access design guidance, which can be accessed at: https://www.weldgov.com/departments/public works/engineering/. Appendix 12-A of the county code can also be referenced. Existing access points with change of use or new access points may or may not be granted. Questions pertaining to access permits or access design shall be directed to the Public Works Department. Application Fee: temporary $75, single residential $75, small commercial $75, industrial $150, field $0, large commercial $150, subdivision $150. This can be accessed at: https://www.weldgov.com/departments/public works/engineering/. For shared accesses, Public Works strongly recommends the property► owner establish an access road maintenance agreement so future owners of the properties will be aware of their requirements for shared maintenance of the access road. This is not a requirement for the recorded exemption but is recommended to avoid property owner conflicts in the future. Per Chapter 12, Appendix 12A.4.1 of the Weld County Code, an access approach that is gated shall be designed so that the longest vehicle (including trailers) using the access can completely dear the traveled way when the gate is closed. In no event, shall the distance from the gate to the edge of the traveled surface be less than 35 feet. The County Road 49 Access Control Plan was adopted by the Board of County Commissioners on December 15, 2014. This access control plan restricts access along County Road 49 to ensure the safe flow of traffic along the corridor. Per Chapter 12, Appendix 12A.10.1, traffic volumes to the proposed facility may require the installation of a tracking control device and/or a minimum of four inches of compacted recycled asphalt or aggregate road base. Tracking control is required to prevent tracking from the site onto public roadways. Minimal standards are listed below. Temporary Tracking Control shall be used during construction unless permanent tracking control is installed ahead of construction activities. Less than 20 passenger vehicle round trips/day, no upfront tracking control requirements. As part of the development review process, all new commercial or residential developments will be required to submit a TIS that is prepared, stamped, and signed by a professional engineer licensed in the State of Colorado, unless the TIS is waived by Public Works. A Traffic Impact Study shall be completed by a Colorado Registered Professional Engineer. The engineer will need to follow the checklist available on the Weld County Public Works website at: http://www.weldgov.com/departments/public works/traffic signing/traffic study checklist/. Any triggers based upon the traffic narrative or the traffic study will be included within the improvements and road maintenance agreement. Public Works may require an Improvements Agreement for one or all the following reasons: • Off -Site Public Improvements • Road Maintenance Agreement • Construction Maintenance Agreement • Access Improvements Agreement An Improvements Agreement is required for sites with required offsite improvements per Chapter 12, Article V, Section 12-5-60. Collateral is required to ensure the improvements are completed, and maintained. Improvements/Road Maintenance Agreement: An example agreement is available at: https://www.weldgov.com/UserFiles/Servers/Server 6/File/Departments/Public%20Works/DevelopmentRevie wlsprusr.pdf. It will detail the approved haul route(s), outline when offsite improvements will be triggered, and include a maintenance agreement for the haul routes. Possible mitigations included in the road maintenance agreement may include but are not limited to: dust control, specified haul routes, damage repairs, and future improvement triggers. Per Chapter 20, Article I, Section 20-1-90, any person commencing development may apply for credit against impact fees otherwise due, up to but not exceeding the full obligation for impact fees proposed to be paid pursuant to the provisions of this Chapter, for any contributions, construction or dedication of land accepted or received by the county for capital improvements of the same type as are eligible for expenditure of the impact fees. In order to receive the impact fee credit, a Front -End Contribution Agreement must be in place prior to approval of any land use case. A Site Plan will be required identifying the following (if applicable): o Show and label location of existing road, existing road right-of-way, future road right-of-way, and easements o Show and label the unmaintained section line right-of-way c Show and label location of the access(es) and label with access permit number o Show and label the access turning radii (Residential — 25' Commercial — 60') o Show and label the approved tracking control Please contact the following staff regarding the following Public Works issues: Access Permits: Janet Lundquist jlundquistAweldgov.com 970-400-3726 Improvements Agreements: Evan Pinkham epinkham@weldgov.com 970-400-3727 MS4 Areas: Lyndsay Holbrook Iholbrook(weldgov.com 970-400-3788 ENGINEERING DEPARTMENT Weld County has recently adopted a new stormwater drainage code located under Chapter 23, Article 12 Storm Drainage Criteria. A list of professional engineering consultants is available if you need help finding an engineer to assist you with your project at the following link http://www.co.weld.co.us/Departments/PlanningZoning/Engineering.html. Please contact the Department of Planning Services/Development Review Engineering for questions or assistance 970-353-6100. This area IS within a Non -Urbanizing Drainage Area: Non -Urbanizing Drainage Areas generally require detention of runoff from the 1 -hour, 100 -year, storm falling on the developed site and release of the detained water at the historic runoff rate of the 1 -hour, 10 -year storm falling on the undeveloped site. Detention pond summarized in a drainage report is required unless the project falls under an exception to stormwater detention requirements per code section 23-12-30 El. To avoid holding up case processing, a minimum of either a preliminary drainage report or a drainage narrative with exception as shown below must be submitted with 7 -day case submittal information. Detention Pond Requirements: 1. A Drainage Report and Detention Pond Design shall be completed by a Colorado Licensed Professional Engineer and adhere to the drainage related sections of the Weld County Code. The Drainage Report must include a Certification of Compliance, stamped and signed by the PE, which can be found on the engineering website. A general Drainage Report Guidance Checklist is available on the engineering website. A Preliminary Drainage Report or a qualifying exception and Drainage Narrative shown below must be submitted for review at the time of the application. The applicants will be required to maintain the historic drainage flows and run-off amounts that exist from the property. A Weld County Grading Permit will be required if disturbing more than 1 acre. Grading Permit applications are accepted after the planning process is complete (map recorded). An Early Release Request Form may be entertained only after the applicant and Planning Department have reviewed the referral and surrounding property owner comments. The Early Release Request may or may not be granted depending on referral comments and surrounding property owner concerns. Contact an Engineering representative from the Planning Department for more information. Application Fees: 1-5 Acres! $50, 5.1- 20 Acres/$100, 20.1 Acres or Greater/$200 + $1 per acre over 20. A Construction Stormwater Permit is also required with the State for disturbing more than 1 acre. Contact: Colorado Department of Public Health and Environment, Water Quality Control Division, Rik Gay, 303-692- 3575. This site IS NOT in a Geologic Hazard Area. This site IS in a FEMA regulatory floodplain. A flood hazard development permit is required for any development in the floodplain. Contact the floodplain planner Diana Aungst at 970-353-6100. If the site requires a detention pond and the detention pond is located in the FEMA regulatory floodplain, the drainage report will be required to indicate how the detention facility will be maintained after a flooding even. A Site Plan will be required identifying the following (if applicable): • Show and label location of drainage related features i.e. detention pond(s), ditches, etc... Detention ponds shall be labeled as "No Build/Storage Area" and include design volume • Show and label the drainage flow arrows showing how the stormwater flows across the property • Show and label the parking and traffic circulation flow arrows showing how the traffic moves around the property CONTACT INFORMATION Hayley Balzano Department of Planning Services Engineer hbalzano@weldgay.com 970-400-3552 Planning Department Additional fees may be included with the Building Permit such as Road Impact, County Facilities and Drainage fees. Please refer to https://www.weldgov.comldepartmentslbuilding/fees/ Screening of the parking area or outdoor storage may be required from any adjacent landowners or public rights -of -way. Please identify any proposed lighting or signs on the Site Plan. Lighting needs to be downcast and shielded. A 16sf sign is allowed in the Agricultural Zone District; however if there are potentially any additional or larger signs please include those in the application. A portion of the site is located in a designated FEMA floodplain. Flood Hazard Development Permits will be required if building within the floodplain. Please show and label the floodplain boundaries and the FEMA Flood Zone and FEMA Map Panel Number on the plat. Contact the Floodplain Administrator, Diana Aungst, at 970- 400-3524 or at daungstweldgov.com to discuss your project. Staff urged the applicant to contact staff for any questions: Planner On Call available Monday through Friday 7:30 a.m. to 4:30 p.m. or contact Kim Ogle at 970-400-3549 or kogle@weldgov.com Colorado's Enterprise Zone (EZ) program, which provides state income tax credits to encourage businesses to locate/expand in designated economically distressed areas of the state. The Weld County EZ program is administered by Upstate Colorado Economic Development. Please contact staff for further directions. The applicants will need to submit a Subdivision Exemption for the leasehold area. Staff explained the USR process. The applicant shall submit 1 packet for a 7 day completeness review. After the 7 day completeness review the applicant will be informed of what items are still required to make the application complete. Staff requested that the applicant submit the remaining material in electronic form. Upon submittal of a completed application it will be sent out for referral for 28 days. The applicant will then meet with their Planner to discuss the referrals and address as many of the referrals as possible. At that meeting the Planning Commission hearing will be scheduled. The Board of County Commissioners hearing typically follows approximately 3 weeks after the Planning Commission hearing. The above notes are provided as a courtesy to the applicant. While we strive to help identify as many potential issues upfront during the pre application meeting we cannot anticipate every issue that may come up during the formal application process. The information contained herein has been placed on filewith the Department of Planning Services. The pre -application is valid for a period of one (1) year from the date of pre - application. If a formal application is not received following the time period specified herein the Planning Department reserves the right to require a new pre -application meeting. Please note that all land use, building and impact fees are subject to change throughout this time period. End memorandum. PRE APPLICATION REVIEW REQUEST • The first meeting with the County's Development Review Team is a Pre -Application review meeting. Anyone with a development idea can schedule a Pre -Application review meeting to get feedback on their idea. Pre - Application meetings are free and are meant to assist property owners and applicants in understanding what is required during development review. • At the Pre -Application meeting, members of various departments will offer comments on the development proposal. Based on the input from the meeting explaining the requirements for the proposed project, the applicant can then decide if they would like to move forward with a formal Land Use application. • Pre -Application reviews are typically held Thursdays and Fridays of any given week at the Planning Department offices at the address at the bottom of this form. Submit the Pre -Application review request form, questionnaire, and map to the planning department. A planner will contact the applicant and set up a date and time for the Pre -Application meeting. • The application can be submitted through our Citizen Portal at https://accela- aca.co.weld.co.uslcitizenaccessl, mailed, emailed (mmartin a@weldgov.com), faxed or dropped off at the Planning Department. • The week following the Pre -Application meeting, the applicant will receive meeting minutes summarizing the requirements that are specific to the project discussed during the meeting. The comments, from the meeting minutes, assist you in preparing the detailed components of your formal Land Use application. • Planning Services serves as the coordinating department. Every development proposal application is assigned a planner who serves as the primary point of contact for the project. Contact Information: Office Use Only Case Number: Planner: Name Manya Miller Phone 214-414-1980 Fax Email manya@discoverymidstream.com Address 7859 Walnut Hill Lane, Suite 335, Dallas, TX 75230 Project Description Winchester Oil Terminal Prooert r Information: Section -Township - T03N RGSW Section 25 Zoning g . Parcel Number 121325400016 Acreage 32.503 Site Address Water Source None Legal Description E1 /2 SECTION 25 T3N R65W 6TH PM SewerkSeptic None Owner Name Discovery Midstream Partners, LLC Is this property currently in violation? Yes No Case Number Preferred date and time for meeting (Thursday or Friday): • To view the Weld County Code, please go to www.co.weld.co.us • To view the Weld County Property Portal, please go to http://www.co.weld.co.uslmaps/propertyinformation/ • To view other Weld County Planning Cases, please go to https://accela-aca.co.weld.co.usicitizenaccessl • Property Information for the application below can be found on the Weld County Assessor website at http://www.co.weld.co.usimaps/propertyinformationi 4/30/2015 1 Weld County Department of Planning Services I Development Review 1555 N. 17th Avenue, Greeley, CO 80631 I Ph: 970-353-6100 I Fax: 970-304-6498 www.co.welci .co.usiDepartments/PlanningZoning PRE APPLICATION REVIEW REQUEST QUESTIONNAIRE: Answer the following questions on a separate sheet. If a question does not pertain to your use, please respond with "not applicable". Planning Questions: Planner on Call 970-353-6100 ext. 3540 1. Explain, in detail, the proposed use of the property. 2. What are the hours and days of operation? (e.g. Monday thru Friday 8am to 5pm.) 3. List the number of full time and part time employees proposed to work at this site. 4. If shift work is proposed include the number of employees per shift. 5. List the number of people who will use this site. Include contractors, truck drivers, customers, volunteers, etc. 6. If this is a dairy, livestock confinement operation, kennel, etc., List the number and type of animals. 7. Describe the type of lot surface and the square footage of each type. (e.g. asphalt, gravel, landscaping, dirt, grass, buildings) Engineering Questions: 970-353-6100 ext. 3540 1. How many raundtripsiday are expected for each vehicle type: Passenger Cars/Pickups, Tandem Trucks, Semi-Truck/Trailer/RV (Roundtrip = 1 trip in and 1 trip out of site) 2. Describe the expected travel routes for site traffic. 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.) 4. Describe the time of day that you expect the highest traffic volumes from above. 5. Describe the existing and proposed (if applicable) direction the water flows within the property. 6. Is there a low spot on the site where water accumulates? Environmental Health Questions: 970-304-6420 ext. 2702 1. What is the drinking water source on the property? If utilizing a drinking water well include the well permit number. 2. What type of sewage disposal system is on the property? If utilizing an existing septic system provide the septic permit number. 3. If storage or warehousing is proposed, what type of items will be stored? Building Questions: Inspector on Call 970-353-6100 ext. 3540 1. List the type, size (sq ft), and number of existing and proposed structures. 2. Will the existing structures be used for this USR? 3. List the proposed uses of each structure. MAP: Show and label the following items: 1. Existing and proposed structures, sizes and uses 2. Existing and proposed parking with dimensions 3. Nearest Public Roads 4. Proposed and Existing Access points 5. Property boundary(s) Development Review Staff are available to assist the applicant's through this process. For questions, please visit us or call The Department of Planning Services at (970) 353-6100. 4/30/2015 2 Weld County Department of Planning Services I Development Review 1555 N. 17th Avenue, Greeley, CO 80631 I Ph: 970-353-6100 I Fax: 970-304-6498 www.co.weldi .co.usiDepartments/PlanningZoning DISCOVERY Discovery OIL TERMINAL SITE PLAN REV. A r 0 0 I DIDC Building (12' x 12') Water flow direction (approx. 5' elev. drop SW to NE) G7 z 0 I- 2 co a ed.U) 'HIII 0 .9-.B0 ..o -.r - r' l % 7 O ~ 1 v��cc77 J CN it ti 7/1 e -- 'yam f r �-1 rO N'—' 'I 0 r i- o,m m goo a I T I I I 47 V L r ti l W r ri. ci> 6 k SG ,+-, g 6p O '� PE 3i El N r u O _ � �l -. f-..r�� : .fi_r. y i '—' •'� � j .43 N L 8 GO Ir F' .1 . CC \ r L I igH_ _— Y c22' 'a� o xm d. Ur +! d VW MD:Y U d r C vm .-. Q 0 L. C x rations Coni ce Building a Pehouse (50' Parking (40 x N Q 00 u u , u u b al al MN 5933V w 'I+ M GW9 �dy •5.--e—ice — 3Hn 1.1213doad ti L CD CD col suclt1 -C LLL. ial construction ,louded area xess Road Via V pprox. 0.7 miles eaprituWOQ loo l„ 4J V C C �sl5F LIOZ 'sG Unr3CdJ 4t3YHnMlSAB &ra•laa-SS-iO 4-3141ild sa\atJIMMJO 1331Y351i 6DVM Irc911 10 d3191t3W. LLOZi 5H3hr SIO\SI031 t,'Jtlb33NlaN3Vd 'HLVd 3ld Discovery Midstream Partners, LIC Weld CountyPre-Application Review Request Planning: 1, The proposed initial use of the property is a crude oil terminal consisting of a single 100,000 barrel crude oil storage tank, inlet/outlet metering and booster pumps. The crude oil will be brought to the facility via a new 12" crude oil pipeline, metered, stored on site then pumped off site via a 12" crude oil pipeline. A potential future expansion would include up to two additional 100,000 barrel tanks, two 250,000 barrel tanks, four 400 barrel break-out tanks, four truck loading/unloading bays and an operations/warehouse building used for operations personnel and parts/equipment storage. 2. The facility will be operated 24 hours per day, 365 days per year. 3. There will be no full time employees, and two part-time employees visiting site daily. 4, There will be no shift work at the site, 5. Initially only the two part-time employees that visit the site. 6. WA 7. Below is the lot surface coverage: Surface Type Area (ft2) Gravel 886,844 Dirt 424,756 Tanks 99,252 Buildings 5,000 Total 114151852 Engineering: 1. Initial' 0 2. Travel route: From WCR 49, east 0.5 miles on WCR 30, south 0.7 miles on private road. 3. It is anticipated that all traffic would come from the east off of WCR 49. 4. The traffic volume (very minimal) would be during daylight hours. 5. Water flows from the SW to the NE 6. There is no low spot for water to accumulate. Environmental Health: 1, No existing water source. 2. No existing sewage disposal system. 3. There will be a storage warehouse for spare parts, tools and equipment. Building: Structure Type Size Purpose Operations/warehouse 50' x 100' operations office; parts, tools and equipment storage PDC Building 12' x 12' house electrical switch gear Communications Tower 100' communications between facility and field operations Google Maps Page 1 of 1 Go gle Maps Imagery ©2017 Google, Map data ©2017 Google 500 ft https://www.google.com/maps/dir//40.194149,-104.6099563/@40.1994476,-104. 606023 8,... 6/15/2017 Hello