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Home My WebLink About20153452.tiff SITE SPECIFIC DEVELOPMENT PLAN AND USE BY SPECIAL REVIEW (USR) APPLICATION , ll FOR PLANNING DEPARTMENT USE c • ` DATE RECEIVED: 11 c.—Y / _ ` ) RECEIPT # /AMOUNT # /$. bU CASE # ASSIGNED: \tom V ,I15 - CC -t-0. APPLICATION RECEIVED BY W-- PLANNER ASSIGNED: I Parcel Number 1 2 1 1 _ 3 3 _ 4 _ 0 0 _ 0 2 0 (12 digit number - found on Tax I.D. information, obtainable at the Weld County Assessor's Office, or www.co.eveld.co us) Legal Description Lot B RE-3696 '�f'c,v-i Nievi taros , Section 33 , Township 3 North. Range 66 West Zone District: AG . Total Acreage: 35.01 , Flood Plain: none , Geological Hazard : none , Airport Overlay District: none . FEE OWNER(S) OF THE PROPERTY: Name: Drill Green LLC Work Phone # 970-310-4134 Home Phone # Email rack92@msn.com Address: 100 Front Street Address. City/State/Zip Code Platteville, Colorado 80651 Name'.----/ ..o a Rii, /c -' Work Phone # 1 -- -/ .• ome Phone # q- ) i,A) LIMY Email Kam- ? z, Address: 5-111--- 90 _/`rt/tit knJa.) Vv Address: City/State/Zip Code 4017 iktotif Co ir. O co V Name: Work Phone # Home Phone # Email I Address: I Address: City/State/Zip Code APPLICANT OR AUTHORIZED AGENT (See Below: Authorization must accompany applications signed by Authorized Agent) Name. Todd Hodges Design, LLC c/o: Todd Hodges Work Phone # 970-215-4311 Home Phone # Email toddhodgesdesign@gwestoffice.net Address: 2412 Denby Court Address: City/State/Zip Code Fort Collins, Colorado 80526 I PROPOSED USE: Oil and Gas support services company uses which include a future office/shop building and storage of vehicles and equipmen I (We) hereby depose and state under penalties of perjury that all statements, proposals, and/or plans submitted with or contained within the application are true and correct to the best of my (our)knowledge. Signatures of all fee owners of property must sign 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 at t e si natory has to legal authority to sign for the corporation. Si ature: Owner or Authorized Agent Date Signature: Owner or Authorized Agent Date 41 r1;;;;;;;;\\ � ` DEPARTMENT OF PLANNING SERVICES 1555 N 17th AVE GREELEY, CO 80631 PHONE: (970) 353-0100, Ext. 3540 0 FAX: (970} 304-0498 COLORADO AUTHORIZATION FORM 1 .- i.;-1,;., A- Leidten----fit, velTist (, - represent -bizilel,L. 61.- 1. C for the property (Agent/Applicant) ) (Owner) located at I 111 .0-:- Oz---IL `ck NE.S1 etc OP— 3 LEGAL DESCRIPTION : SEC 33 TWN 3 RNG a" SUBDIVISION NAME: t A 7 a -- 361 LOT BLK I can be contacted at the following phone Ws: Home Work 1 70 T Z. I-4 - Lt13 t i Fax # Je/C2lit 1 a1el ketl ettS µe if tsacc-44. The property owner can be contacted at the following phone #'s Home 970.-3 /0 -y / 3 `f Work '70 - 7 5-5 -1O/7 Fax # 170 " 7 e- " 803 Correspondence mailed to (only one): Agent/Applicant t7rnnorr;y fu,nc.r SATE 7/ / Sr OWNER'S SIC NATUR Colorado Secretary of State �- Date and Time: 02/19/2015 11 :57 AM Document must be filed electronically. ID Number: 20081050109 Paper documents are not accepted. Fees & forms are subject to change. Document number: 20151115103 For more information or to print copies Amount Paid: $10.00 of filed documents, visit www.sos.state.co.us. ABOVE SPACE FOR OFFICE USE ONLY Periodic Report filed pursuant to §7-90-301 , et seq. and §7-90-501 of the Colorado Revised Statutes (C.R.S) ID number: 20081050109 Entity name: Drill Green LLC Jurisdiction under the law of which the entity was formed or registered: Colorado 1 . Principal office street address: 100 Front Street (Street name and number) Platteville CO 80651 (City) State) (Postal/Zip Code) United States (Province - if applicable) (Country - if not US) 2. Principal office mailing address: PO Box 1021 (if different from above) (Street name and number or Post Office Box information) Platteville CO 80651 (City) State) (Postal/Zip Code) United States (Province - if applicable) (Country - if not US) 3. Registered agent name: (if an individual) BUHLER H L E R REED G (Last) (First) (Middle) (Suffix) or (if a business organization) 4. The person identified above as registered agent has consented to being so appointed. 5. Registered agent street address: 100 Front Street (Street name and number) Platteville CO 80651 (City) (State) (Postal/Zip Code) 6. Registered agent mailing address: PO Box 1021 (if different from above) (Street name and number or Post Office Box information) Platteville CO 80651 ---N (City) Statef (PostallZip Code) United States (Province— if applicable) (Country— if not US) REPORT Page 1 of 2 Rev. 12/01/2012 Notice: Causing this document to be delivered to the secretary of state for filing shall constitute the affirmation or acknowledgment of each individual causing such delivery, under penalties of perjury, that the document is the individual's act and deed, or that the individual in good faith believes the document is the act and deed of the person on whose behalf the individual is causing the document to be delivered for filing, taken in conformity with the requirements of part 3 of article 90 of title 7, C.R.S., the constituent documents, and the organic statutes, and that the individual in good faith believes the facts stated in the document are true and the document complies with the requirements of that Part, the constituent documents, and the organic statutes. This perjury notice applies to each individual who causes this document to be delivered to the secretary of state, whether or not such individual is named in the document as one who has caused it to be delivered. 7. Name(s) and address(es) of the individual(s) causing the document to be delivered for filing: Brian Joel (Last) (First) (Middle) (Suffix) 100 Front Street (Street name and number or Post Office Box information) Platteville CO 80651 (City) State (Postal/Zip Code) United States (Province — if applicable) (Country — if not US) (The document need not state the true name and address of more than one individual. However, if you wish to state the name and address of any additional individuals causing the document to be delivered for filing, mark this box n and include an attachment stating the name and address of such individuals.) Disclaimer: This form, and any related instructions, are not intended to provide legal, business or tax advice, and are offered as a public service without representation or warranty. While this form is believed to satisfy minimum legal requirements as of its revision date, compliance with applicable law, as the same may be amended from time to time, remains the responsibility of the user of this form. Questions should be addressed to the user's attorney. REPORT Page 2 of 2 Rev. 12/01/2012 SITE SPECIFIC DEVELOPMENT PLAN AND USE BY SPECIAL REVIEW (USR) QUESTIONNAIRE The following questions are to be answered and submitted as part of the USR application . If a question does not pertain to your use, please respond with "not applicable", with an explanation as to why the question is not applicable. 1 . Explain , in detail , the proposed use of the property. Drill Green, LLC is an oilfield construction, maintenance and trucking company that provides services to clients at the job sites. The company has an existing office and yard located in Platteville. This site will eventually have an office/shop building but will mainly be used for storage. The roustabout crew working out of this facility will come to the site to pick up or drop off equipment. The site will be used for storage of trucks, tanks, trailers, and other equipment associated with the business. The site plan has 50 frac tank & trailer parking spots and 106 parking spaces delineated next to the building. Currently, there are not existing structures located on the property. A future 20, 000 square foot building is proposed for office and shop space. The remainder of the property will remain in agricultural uses. A small portion of the site will be fenced with a 6 ' chain link security fence with lighting. The fence location and a detail has been delineated on the site plan. Security lighting will be on the building and details will be submitted at time of building permit. All proposed lighting will meet Weld County code requirements. 2 . Explain how this proposal is consistent with the intent of the Weld County Code, Chapter 22 of the Comprehensive Plan . This proposal is consistent with Section 22-2-20, Agricultural goals and policies for conversion of land use to commercial and/or industrial uses. The site is located in the Platteville future growth area that has good safe access via county roads to US 85. Adequate services exist and the proposed office can be served by a new well and septic system. This proposal doesn 't remove prime agricultural land from production but allows for continued agricultural uses on the portions of the property. The proposed uses are very consistent with the existing uses in the area which include numerous oil/gas production facilities, USR's for a dairy, kennel and an airstrip, agricultural uses, and a major transmission line east and adjacent to the property. The review and approval process insures that any potential impacts are mitigated. 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 . This proposal is very consistent with the intent of the Weld County Code, Chapter 23 in the fact that the proposed use is allowed for in the agricultural zone district through the submittal, review and approval of a Use by Special Review for an oil and gas support and service. 4 What type of uses surround the site (explain how the proposed use is consistent and compatible with surrounding land uses). There are residential uses approximately % mile to the southeast, south and southwest of the site. Existing oil and gas facilities are located on all the surrounding properties. There are other USR 's that exist in the area which include a dairy, kennel and an airstrip. The site is not in close proximity to other developed sites in the area. The proposed continued agricultural uses of the unused portions of the property are consistent with adjacent properties. Access to the site doesn 't conflict with other existing uses in the area and the review and approval process insures that any potential incompatibilities will be addressed. 5. Describe, in detail , the following : a . Number of people who will use this site Currently the company has 24 full time employees but as many as 60 full time employees could use the site in the future based on the clientele and oil prices. The company has an office and yard for trucks in Platteville and this site will mainly be used for storage of vehicles and equipment. 1 b. Number of employees proposed to be employed at this site Once built up to 5 employees will be using the office during the day. These employees are mainly supervisors, safety personnel and office staff. The remainder of the employees only go to the site to pick up or drop off equipment. The oil and gas support portion of the company is done on the job site. The construction of the building is still being evaluated and is impacted by work load and oil prices. c. Hours of operation The nature of the business requires 24/7 operations. The typical hours of operation will be 7:00 am to 7:00 pm, 7 days a week. d . Type and number of structures to be erected (built) on this site There is one new approximately 20, 000 square foot office/shop building being proposed. The proposed building is delineated on the plan and also shown in the engineering documents. e. Type and number of animals, if any, to be on this site No animals are proposed to be on this site at this time. The applicant would like to reserve the ability to use the site for uses by right in the agricultural zone district. f. Kind of vehicles (type, size, weight) that will access this site and how often Currently the company has % & 1 ton trucks, trailers both goose neck and bumper pull, skid steers and backhoes with trailers, frac tanks, trailers with equipment attached, and job site and travel trailers . Employees either come in from the other site in Platteville with trucks to pick up or drop off equipment. Some may park their personal vehicles on the site and drive the company vehicles to the job site. Current Current Number of Current Number of Type of Vehicle Number of Vehicles Traveling Vehicles Traveling Round Trips North to Site South to Site Passenger 10 2 8 Cars/Pickups Tandem Trucks 4 1 3 Semi-Trucks/Trailer/RV 6 1 5 Current Totals 20 4 16 Currently, 20% of the vehicles are traveling north to the site. and 80% of the vehicles are traveling south to the site. The current total vehicle count is 20 vehicles per day. 2 Future Future Number of Future Number of Type of Vehicle Number of Vehicles Traveling Vehicles Traveling Round Trips North to Site South to Site Passenger 110 30 80 Cars/Pickups Tandem Trucks 8 2 6 Semi-Trucks/Trailer/RV 11 2 9 Future Totals 129 34 95 In the future, 26% of the vehicles will travel north to the site and 74% of the vehicles will travel south to the site. The future total vehicle count is 129 vehicles per day. This total is well below the lowest improvement trigger of 200 vehicles per day. In both situations, the highest traffic volumes will occur between 7:00-8:00 am as people are arriving to work and between 5:00-6:00 pm as people are leaving from the site. g . Who will provide fire protection to the site The Platteville Fire Protection District provides service to this site. h . Water source on the property (both domestic and irrigation) A well is proposed and will be applied for at the time of the building permit for the office. I . Sewage disposal system on the property (existing and proposed) Sewage is proposed to be a septic system. A permit will be applied for at time of the building permit for the office. A port a let will be used on site until such time the office is constructed. j . If storage or warehousing is proposed , what type of items will be stored The main use of parking of vehicles and equipment. No warehousing is proposed with this request. 6. Explain the proposed landscaping for the site. The landscaping shall be separately submitted as a landscape plan map as part of the application submittal . No landscaping is proposed at this time. 7. Explain any proposed reclamation procedures when termination of the Use by Special Review activity occurs. There should not be any reclamation required based on the nature of this proposal. 8. Explain how the storm water drainage will be handled on the site. A separate water quality report by Wohnrade Civil Engineering is included in the submittal. 9. Explain how long it will take to construct this site and when construction and landscaping is scheduled to begin . Construction for the storage is not necessary based on the existing uses of the site. Construction of the new office/shop will be based on final cost and other influences on the company based on operations. 3 10. Explain where storage and/or stockpile of wastes will occur on this site. Debris and refuse will be collected and removed by McDonald Farms. Roll offs are usually on site and located within the storage area delineated on the map. There are not any other proposed storage or stockpiling of wastes on this site. 11 . Please list all proposed on-site and off-site improvements associated with the use (example : landscaping , fencing , drainage, turn lanes, etc. ) and a timeline of when you will have each one of the improvements completed . On site improvements include some grading and minor drainage work, grading and maintenance of access road, fencing and gated entrance, security lighting, portable toilet, future new septic system and well, and a future office/shop. See site plan for details. As discussed above, the improvements will be based on the approval of the USR and associated permits. An exact timeline for all improvement has not been completed. No off-site improvements are proposed. Dust Abatement and Waste Handling Plan Dust will be handled with water trucks as necessary. The site will be primarily gravel and will be graded and maintained as necessary. There will be no storage of wastes on this site other than in the roll offs. Any wastes from employees will be contained in a dumpster and hauled off regularly by McDonald Farms. Any household/office cleaning supplies/chemicals for the future office/shop building will be used and stored in accordance with manufacturer recommendations. Used oil and other fluids are stored appropriately and hauled off by Raptor used oil recovery located in Greeley. No used tires or batteries are stored on site. Used tires are taken by GCR tires & service when a new tire is placed on a vehicle or trailer. Used batteries are traded for new battery when purchased. 4 Weld County Treasurer Statement of Taxes Due Account Number R2828404 Parcel 121133400020 Assessed To DRILL GREEN LLC 129 S MADISON AVE LOVELAND, CO 80537-6500 Legal Description Situs Address PT E2SE4 33-3-66 LOT B REC EXEMPT RE-3693 (.76R) Year Tax Interest Fees Payments Balance Tax Charge 2014 $12.26 $0.00 $0.00 ($12.26) $0.00 Total Tax Charge $0.00 Grand Total Due as of 07/09/2015 $0.00 Tax Billed at 2014 Rates for Tax Area 2193 - 2193 Authority Mill Levy Amount Values Actual Assessed WELD COUNTY 15.8000000* $5.05 AG-GRAZING LAND $1 ,054 $310 SCHOOL DIST RE1 9.0690000 $2.91 AG-WASTE LAND $12 $10 PLATTEVILLE-GILCREST FIRE 3.8030000 $1 .22 Total $1 ,066 $320 AIMS JUNIOR COLLEGE 6.3330000 $2.03 HIGH PLAINS LIBRARY 3.2670000 $1 .05 Taxes Billed 2014 38.2720000 $12.26 * Credit Levy ALL TAX LIEN SALE AMOUNTS ARE SUBJECT TO CHANGE DUE TO ENDORSEMENT OF CURRENT TAXES BY THE LIENHOLDER OR TO ADVERTISING AND DISTRAINT WARRANT FEES. CHANGES MAY OCCUR AND THE TREASURER'S OFFICE WILL NEED TO BE CONTACTED PRIOR TO REMITTANCE AFTER THE FOLLOWING DATES: PERSONAL PROPERTY AND MOBILE HOMES - AUGUST 1 , REAL PROPERTY - AUGUST 1 . TAX LIEN SALE REDEMPTION AMOUNTS MUST BE PAID BY CASH OR CASHIERS CHECK. Weld County Treasurer P.O. Box 458, Greeley CO 80632 1400 N 17th Ave, Greeley CO 80631 (970) 353-3845 ext. 3290 FOR COMMERCIAL SITES, PLEASE COMPLETE THE FOLLOWING ONFOfNINATION BUSINESS EMERGENCY INFORMATION: Business Name: Drill Green LLCgesfrhont, 1"14 Address: 100 From Street city, s7 COo80651 Business Owner: Reed Buhler phone. 970410-4134 Asa— Home Address: J ./ City, ST, ,ZIFY C0 _ 1O1W List three persons in the order to be called in the event of an emergency, NAME TITLE ADDRESS PHONE erne 4 tiodie 42 Ce7r) 3,0 VZice ks. vimfs L k41k71 f3r ra A:? V3 Business Hours : -' Days: 7 Type of Alarm. one Burglar Holdup Fire Silent Audible Name and address of Alarm Company : Location of Safe : _ * b . * * * * * . * * * * * ** ** * * t-1* * * * ** ** *** ** * * * * f * f ** * * * F * f If * * ► * * ** *. ****• s* *********.** t*l ****rfF* **********Pit11+Ot**** *'** MISCELLANEOUS INFORMATION : Number of entry/exit doors in this building : j Location(s) , 4 Is alcohol stored in building ? pt' Location s - Are drugs stored in building?-11-7-Location( s): Are weapons stored in building?, hi) ,Location( s) : The following programs are offer public service of the Weld Coun riffs Office. Please indicate the programs of interest. Physical Security Check Crime Prevention Presentation UTILITY SHUT OFF LOCATIONS : Main Electrical . A. Wn Gas Shut Off Z Exterior Water Shutoff: Tialb37.7 tkt LP 0; e've•E Whet - � r r Interior Water Shutoff_ t7 G.- v COO ) Weld County Public Works Dept. -4 1111 H Street ACCESS PERMIT -Olit, iiri#co I P.O. Box 758 %it-: -or -` Greeley, CO 80632 APPLICATION FORM Z/C WQ` Phone: (970)304-6496 Fax: (970)304-6497 Applicant Property Owner (If different than Applicant) Name Reed Buhler Name Company Drill Green , LLC Address Address 100 Front Street / P.O. Box 1021 City State Zip City Platteville State CO Zip 80651 Phone Business Phone 970-310-4134 Fax Fax E-mail E-mail A = Existing Access A= Proposed Access Parcel Location & Sketch The access is on CR 31 Nearest Intersection: CR 26 & CR 31 WCR 28 Distance from Intersection 1 ,580 feet Parcel Number 1211334000020 Section/Township/Range 33 13N 166W t fr v 31 Is there an existing access to the propertywj'cES NOQ N EXACCE .S Number of Existing Accesses 1 Road Surface Type & Construction Information Asphalt Q Gravel �:`'� Treated O Other JCR 26 Culvert Size & Type N .A. o v4 a.tt4M Materials used to construct Access N .A. Construction Start Date N .A. Finish Date N .A. Proposed Use QTemporary (Tracking Pad Required)/ $75 0 Single Residential/$75 Qlndustrial/$150 LJi Small Commercial or Oil & Gas/$75 () Large Commercial/$150 QSubdivision/$150 Q Field (Agriculture Only)/Exempt Is this access associated with a Planning Process? Q No Q USR 'CI RECX/SUBX Q PUD 0 Other Required Attached Documents - Traffic Control Plan -Certificate of Insurance - 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 all 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 Printed Name Reed Buhler Date Approved by Revised Date 6/29/10 Drill Green Recorded Exemption WCR 26 Future Access Weld County, Colorado Approved w/ RE - 3693 Looking North at approved access from WCR 26 rira- 3 • 4 Looking West from approved access point on WCR 26 s o • - r' - Looking East from approved access point on WCR 26 13:- Wohnrade Civil Engineers, Inc. Page 1 of 2 June 25, 2015 Drill Green Recorded Exemption WCR 31 Existing Access Weld County, Colorado Looking West at existing access on WCR31 ..:c -_-> ____ --s._ . ...+,4.6- w!t'.. -- --,__- -- • Looking South from existing access _ point on WCR 31 EA'R, 7. _ -'— .f'. _ spa ...,:t-, _ _ - � . ..,. L �t ♦� . . Y , T' jim lipil Looking North from existing access point on WCR 31 tip- �_ _ . __...ti.-ye. Y ...ti „„, 4 Ji. 1. .•• 4 - . .1r.T' S*.\ ••••• - 1-;- Wohnrade Civil Engineers, Inc. Page 2 of 2 June 25, 2015 Drainage Narrative for Drill Green, LLC Use By Special Review Weld County, Colorado July 3 , 2015 Prepared for: Drill Green , LLC 100 Front Street Platteville, Colorado 80651 Prepared by: 1 gr — 0 Wohnrade Civil Engineers, Inc. 11582 Colony Row Broomfield, Colorado 80021 Phone: (720)259-0965, Fax: (720)259-1519 Project Number: 1505.00 - DRL �_ Wohnrade Civil Engineers, Inc. 4- 11582 Colony Row, Broomfield, Colorado 80021 Phone: 720-259-0965, Fax: 720-259-1519 July 3 , 2015 Diana Aungst Weld County Planning and Building Department 1555 N . 17th Avenue Greeley, Colorado 80631 Re : Drainage Narrative for Drill Green Use by Special Review - PRE15-0072 Weld County, Colorado Dear Ms. Aungst: Wohnrade Civil Engineers, Inc. is pleased to submit this drainage narrative for the Drill Green Use By Special Review application , located in Weld County, Colorado . This report complies with drainage related sections of the Weld County Code , and with the Urban Storm Drainage Criteria Manual , prepared by the Urban Drainage and Flood Control District (UDFCD ) . If you should have any questions or comments as you review this report, please feel free to contact me at your convenience . Sincerely, WOHNRADE CIVIL ENGINEERS , INC. Mary B . Wohnrade , P . E . (CO, IL, NV) CERTIFICATION OF COMPLIANCE ENGINEERING DESIGNED TO WELD COUNTY CODE STANDARDS AND CRITERIA I , Mary B. Wohnrade, P. E. , Consultant Engineer for Drill Green, LLC ("Applicant") , understand and acknowledge that Applicant is seeking land use approval of a Use By Special Review ("Application") for the property described in the attached Exhibit "A." 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 meet all applicable drainage requirements of the Weld County Code with the exception of variance(s) described below. This certification is not a guarantee or warranty either expressed or implied. St op RtQ j N/ 9. y�• WW/4/9_,\�-�`C �' m '` • `� Mary B. Wohnrade, P. E. wla 30325 e Registered Professional Engineer of Record tcv `� °•-7/3 l`5.••• k State of Colorado No. 30325 �•6 • 5) • •••••e••• d'w �a ®`4',�/'1V AL NCS4,41/11111111O ae VARIANCE REQUEST 1 ) Describe the Weld County Code criteria of which a variance is being requested. 2) Describe why it is not possible to meet the Weld County Code. 3) Describe the proposed alternative with engineering rational which supports the intent of the Weld County Code. I understand and agree that the intention of the Code is to reduce impacts of development on neighboring downstream properties and the public. I understand if this variance request is approved it is not precedent setting and is based on site specific constraints. Planning Director Approval indicated when signed by director or appointee: • Planning Director Name Signature Date of approval , . WELD COUNTY Drill Green Vicinity Mao girt ONLINE MAPPING N L , WCR 28 WCR (28 Sp i l Legend M de — Highway U Road tP Road e 2,.. Highway 2 cy Lake - Reservoir Other Hydro — River - Stream - Creek City Limits C R-26iii Ault ■ Berthoud Brighton Dacono Eaton Erie Evans . Firestone Fort Lupton Mose I)uri\ Rrserrciir Ntonher 2 Frederick 1{11O11 E.d'IEI1SIOij Garden City 6 . Garden G�LIJU! tGilcrest Greeley Grover Mose Davis Lake Hudson I \ Johnstown / Keenesburg r Kersey 1: 24,000 O Notes Enter Map Description 4,000.0 0 2,000.00 4,000.0 Feet This map is a user generated static output from an Internet mapping site and is for reference only. Data layers that appear on this map may or may not be accurate, WGS_1984_Web_Mercator_Auxiliary_Sphere current, or otherwise reliable. © Weld County Colorado THIS MAP IS NOT TO BE USED FOR NAVIGATION TABLE OF CONTENTS VICINITY MAP Page No. I INTRODUCTION 1 . 1 Objective 1 1 .2 Project History and Previous Studies 1 1 .3 Mapping and Surveying 1 1 .4 Site Reconnaissance 1 II SITE LOCATION AND DESCRIPTION 2 . 1 Site Location 1 2 .2 Site Description 1 III HISTORIC CONDITIONS 3. 1 Historic Site Conditions 2 3.2 Historic Drainage Patterns 2 3.3 Historic Drainage Basins 2 IV DEVELOPED CONDITIONS 4. 1 Proposed Site Development 2 4.2 Developed Drainage Patterns 2 4.3 Developed Drainage Basins 3 4.4 Water Quality Pond Design 3 V DESIGN CRITERIA 5. 1 Design References 3 5.2 Hydrologic Criteria 3 VI EROSION CONTROL 6. 1 Erosion Control Plan 4 6.2 Site Stabilization 4 VII CONCLUSIONS 7. 1 Compliance with Standards 4 7.2 Variances 4 REFERENCES 5 Drainage Narrative for Drill Green , LLC - Use By Special Review Weld County, Colorado July 3, 2015 I . INTRODUCTION 1 . 1 Objective This narrative documents the results of a comprehensive hydrologic and hydraulic evaluation of pre and post-development conditions for the Drill Green property located in Weld County, Colorado. 1 .2 Project History and Previous Studies There are no known drainage studies that predate this analysis. 1 . 3 Mapping and Surveying Field survey information and topographic mapping with a contour interval of 1 - foot was obtained by Wohnrade Civil Engineers on June 11 , 2015 from Intermill Land Surveying of Loveland , Colorado. Additional topography outside of the project boundary was taken from USGS topographic mapping with a ten ( 10 ) foot contour interval . 1 .4 Site Reconnaissance A site visit was conducted by the project engineer on June 20 , 2015 to verify information contained on the field topographic survey. Existing drainage patterns and structures have been field-verified for use in defining drainage basin boundaries and historic flow patterns. II SITE LOCATION AND DESCRIPTION 2 . 1 Site Location The site is located in the East % of the SE 1 /4 of Section 33 , Township 3 North , Range 66 West of the 6th Principal Meridian , Weld County, Colorado . The property is bounded by Weld County Road 31 on the east, and Weld County Road 26 on the south (See Vicinity Map). The project site is surrounded by agricultural properties. The nearest residence is located roughly 1 , 000-feet to the south , and adjacent to Weld County Road 26 . There are no know Master Drainage Basin Plans which would include the project site . 2 .2 Site Description The 61 . 39 ac Drill Green property will be part of a proposed Recorded Exemption application to Weld County, which will run concurrently with the Use By Special Review application . The proposed Recorded Exemption will divide the property into two parcels, Lot A and Lot B . Lot B is approximately 35 . 0 acres, and is located at the north end of the property. This portion of the site will be used as a proposed oil and gas support facility, which will include outdoor Drainage Narrative Wohnrade Civil Engineers, Inc. Drill Green Use By Special Review, PRE15-0072 July 3, 2015 Page 2le storage, and a future 20 , 000 sf single story steel structure . Lot A is 25.94 acres, and will continue to be used for agricultural purposes. A geotechnical report has was not prepared for this USR application . III. HISTORIC CONDITIONS 3 . 1 Historic Site Conditions The site is currently used for agricultural purposes, as well as for oil and gas operations. There are no structures or impervious surfaces contained within the existing site , therefore the existing site imperviousness is 0% . There are no known drainage related issues within the project site , and the property is not located within a FEMA regulatory floodplain . 3 .2 Historic Drainage Patterns The existing project site drains overland from east to west onto the adjacent property to the west. Stormwater runoff continues to flow overland across the adjacent property in a poorly defined historic drainage swale . There are no irrigation ditches or stormwater detention facilities within the property, and no stormwater runoff enters the site from adjacent properties. 3 . 3 Historic Drainage Basins The project site has been divided into one historic basins totaling 35 . 0 acres, which is designated as Lot B in the new Recorded Exemption . Basin H1 (35 .0 acres) drains overland generally from east to west to Design Point H1 , at slopes ranging from 1 . 32% to 3 . 37% towards the existing agricultural property to the west. The 10 and 100-year peak discharges from Basin H1 are 15 .8 and 57 .9 cfs respectively. Calculations made as part of this analysis along with other supporting material , are contained in Appendix A of this report. IV. DEVELOPED CONDITIONS 4 . 1 Proposed Site Development The developed site is roughly 35.0 acres, and includes Lot B of the proposed Recorded Exemption . Proposed site improvements include : a new 20 , 000 sf single-story steel structure, new gravel drive and parking , and outdoor storage. Future improvements will also include an onsite sewage disposal system and well . The proposed site imperviousness is 4 .7% . 4 .2 Developed Drainage Patterns The 35 . 0 acre site has been divided into one developed drainage basin . Drainage Narrative Wohnrade Civil Engineers, Inc. Drill Green Use By Special Review, PRE15-0072 July 3, 2015 Page 3le Developed runoff patterns are intended to generally mimic historic flow patterns . 4 . 3 Developed Drainage Basins Basin 1 (35 .0 acres) drains overland generally from east to west to Design Point 1 , at slopes ranging from 1 .32% to 3 .37% towards the existing agricultural property to the west. The 10 and 100-year peak discharges from Basin 1 are 17 .8 and 61 .7 cfs respectively. Calculations made as part of this analysis along with other supporting material , are contained in Appendix A of this report. 4 .4 Water Quality Pond Design Stormwater runoff from developed Basin 1 will be conveyed to an onsite water quality pond , which is located at the historic discharge location (Design Point H 1 ) for recharge, water quality treatment, and stormwater detention . The WQCV Pond has a storage capacity of 6 , 090 . 51 cu-ft from an elevation of 4952 .00 to 4952 . 90 . There will be no pond outlet structure . Stormwater runoff from the developed site must overflow the top of the west pond embankment, which is at an elevation of 4953 . 0 . Calculations made as part of this analysis along with other supporting material , are contained in Appendix B of this report. V. DESIGN CRITERIA 5 . 1 Design References Drainage related sections of the Weld County Code , and the Weld County Engineering and Construction Criteria (Reference 1 ) have been referenced in the preparation of this drainage narrative . In addition , the Urban Storm Drainage Criteria Manual , Volumes 1 -3 , by the Urban Drainage and Flood Control District (Reference 2), has also been referenced . 5 .2 Hydrologic Criteria Due to the relatively small basin size the Rational Method has been used to estimate peak stormwater runoff from the project site. The initial 10-year and , major 100-year design storms have been used to evaluate the proposed site . Rainfall intensity data for the Rational Method has been taken from IDF equations generated specifically for the Drill Green site by the computer program "Watershed Modeling" by Eagle Point software . Input of precipitation amounts for the generation of intensity equations have been taken from the NOAA Precipitation Frequency Data Server using Atlas 14 , Volume 8- Colorado. Drainage Narrative Wohnrade Civil Engineers, Inc. Drill Green Use By Special Review, PRE15-0072 July 3, 2015 Page 4le VI . EROSION CONTROL 6 . 1 Erosion Control Plan A proposed rainfall erosion control plan during construction will consist of temporary structural erosion control measures, which have been specified on the Site Plan . Erosion control measures will also be specified on three separate drawings contained in the written Stormwater Management Plan (SWMP). These drawings include a Pre-disturbance , Interim , and Final Stabilization Plans . A Stormwater Management Plan (SWMP) will be prepared for this project by Wohnrade Civil Engineers, Inc. at the time of building permit. A Colorado Discharge Permit System (CDPS), Stormwater Discharge Associated with Construction Activities application will also be submitted to the Colorado Department of Public Health and Environment at that time . 6 .2 Site Stabilization All areas disturbed by construction will either be paved with a gravel surface or, re-seeded using the recommended seed varieties, quantities, and application rates as specified on the Site Plan . VII . CONCLUSIONS 7 . 1 Compliance with Standards All applicable drainage criteria have been implemented in accordance with standard hydrologic and hydraulic engineering practices. 7 .2 Variances No variances are requested as part of this development. Drainage Narrative Wohnrade Civil Engineers, Inc. Drill Green Use By Special Review, PRE15-0072 July 3, 2015 Page 51;- REFERENCES 1 ) Weld County Engineering and Construction Criteria , April 2012 . 2) Urban Storm Drainage Criteria Manual , Urban Drainage and Flood Control District, Denver, Colorado , Revised April 2008 . c Appendix A Drill Green Use By Special Review Wohnrade Civil Engineers, Inc. Case File. PRE15-0072 June 26, 2015 Composite Percentage Imperviousness Calculations : Historic Condition, Basin H1 NRCS Soil Type B Surface Characteristics Streets: Streets: Drives and Roofs Lawns Imperviousness Paved Gravel Walks Sandy Soil Area (acres) 0.0 0.0 0.0 0.0 35.00 0.0200 Percent Imperviousness 100 40 90 90 2 Total Area (acres) 35.0 Correction Factors KA and KOo for Use With Equations RO-6 and RO-7 NRCS Soil Type 2Year 5-Year 10-Year 25-Year 50-Year 100-Y ear C and D 0.000 0. 108 0.206 0.324 0.393 0.452 A 0.000 0.088 0.167 0.236 0.276 0.315 Equations RO-6 and RO-7. Drainage Criteria Manual, Volume 1 CA 0.00 -0.01 0.07 0. 14 0. 18 0.22 CB 0.03 0.08 0.17 0.26 0.31 0.36 CCD 0.06 0.16 0.26 0.38 0.45 0.51 Equations taken from Urban Storm Drainage Criteria Manual, Volume 1 , Chapter 5, Section 2.7, by the Urban Drainage and Flood Control District, Denver, Colorado Developed Condition , Basin 1 NRCS Soil Type B Surface Characteristics Streets: Streets: Drives and Roofs Lawns Imperviousness Paved Gravel Walks Sandy Soil Area (acres) 0.0 1 .46 0.0 0.46 33.08 0.0474 Percent Imperviousness 100 40 90 90 2 Total Area (acres) 35.0 Correction Factors KA and K00 for Use With Equations RO-6 and RO-7 NRCS Soil Type 2Year 5-Year 10-Year 25-Year 50-Year 100-Y ear C and D 0.000 0. 105 0.201 0.317 0.384 0.442 A 0.000 0.086 0.163 0.231 0.270 0.308 Equations RO-6 and RO-7. Drainage Criteria Manual, Volume 1 CA 0.00 0.02 0.09 0. 16 0.20 0.24 CB 0.04 0.10 0.19 0.28 0.33 0.38 • Cc0 0.08 0.18 0.28 0.39 0.46 0.52 S:\PROJECTS\DRL\DRNG\DRL-RunoffCoefficients.wpd Page 1 of 1 Historic Condition 10 -Yr Runoff Computations Weld County, Colorado, Overland Flow, Time of Concentration : T;= 1 .8( 1 . 1 -05)L112 / S113 Gutter/Swale Flow, Time of Concentration : Tt= L / 60V To= Ti + Tt Intensity, (i) taken from intensity formula for the Drill Green site, i =45. 32/(Tc+9. 12)078 Calculations By: M . Wohnrade Velocity, (V) taken from Figure 3-1 Project: Drill Green USR Rational Equation : Q= ciA Date: June 27, 2015 Upstream Overland Flow Gutter/Pipe Flow Swale Flow Time of Design Basins Concentration Area, A Runoff Point (acres) Coefficient Length.L Slope,S T, Length,L Slope,S Velocity,V T, Length,L Slope,S Velocity,V T T( Intensity,i Flow,Q T. C C (ft) (%) (min) (ft) (%) (fps) (min) (ft) (%) (fps) (in/hr roi,m u?rn, ) (cfs) H1 H1 0.0 35.00 0.17 0.08 300 3.4 21.2 1068.0 1 .3 2.34 7.6 0.0 0.0 0.00 0.0 28.8 2.66 15.8 S:\PROJECTS\DRL\DRNG\DRL-Runoff.wpd Page 1 of 4 Wohnrade Civil Engineers, Inc. Historic Condition 100-Yr Runoff Computations Weld County, Colorado, Overland Flow, Time of Concentration: T1= 1 .8(1 . 1 -05)L1/2 / S1/3 Gutter/Swale Flow, Time of Concentration: Tt= L / 60V Tc= Ti + Tt Intensity, (i) taken from intensity formula for the Drill Green site, i =78.38/(Tc+9. 12)078 Calculations By; M. Wohnrade Velocity, (V) taken from Figure 3-1 Project: Drill Green USR Rational Equation: Q= ciA Date: June 27, 2015 Upstream Overland Flow Gutter/Pipe Flow Swale Flow Time of Design Basins Concentration Area, A Runoff Point (acres) Coefficient Length,L Slope,S Ti Length,L Slope,S Velocity,V T, Length,L Slope,S Velocity,V Intensity,i Flow,Q Te c C5 (ft) (%) (min) (ft) (%) (fps) (min) (ft) (%) (fps) T` T` (rninl Do (m/hr) (cfs) H1 H1 0.0 35.00 0.36 0.08 300 3.4 21.2 1068.0 1.3 2.34 7.6 0.0 0.0 0.00 0.0 28.8 4.60 57.9 S:\PROJECTS\DRL\DRNG\DRL-Runoff.wpd Page 2 of 4 Wohnrade Civil Engineers, Inc. Developed Condition 10 -Yr Runoff Computations Weld County, Colorado, Overland Flow, Time of Concentration : T;= 1 .8( 1 . 1 -05)L112 / S113 Gutter/Swale Flow, Time of Concentration : Tt= L / 60V To= Ti + Tt Intensity, (i) taken from intensity formula for the Drill Green site, i =45. 32/(Tc+9. 12)078 Calculations By: M . Wohnrade Velocity, (V) taken from Figure 3-1 Project: Drill Green USR Rational Equation : Q= ciA Date: June 27, 2015 Upstream Overland Flow Gutter/Pipe Flow Swale Flow Time of Design Basins Concentration Area, A Runoff Point (acres) Coefficient Length.L Slope,S T, Length,L Slope,S Velocity,V T, Length,L Slope,S Velocity,V T T( Intensity,i Flow,Q T. c C (ft) (%) (min) (ft) (%) (fps) (min) (ft) (%) (fps) (in/hr roi,m u?rn, ) (cfs) 1 1 0.0 35.00 0.19 0.10 300 3.4 20.8 1068.0 1 .3 2.34 7.6 0.0 0.0 0.00 0.0 28.4 2.68 17.8 S:\PROJECTS\DRL\DRNG\DRL-Runoff.wpd Page 3 of 4 Wohnrade Civil Engineers, Inc. Developed Condition 100-Yr Runoff Computations Weld County, Colorado, Overland Flow, Time of Concentration: T1= 1 .8(1 . 1 -05)L1/2 / S1/3 Gutter/Swale Flow, Time of Concentration: Tt= L / 60V Tc= Ti + Tt Intensity, (i) taken from intensity formula for the Drill Green site, i =78.38/(Tc+9. 12)078 Calculations By; M. Wohnrade Velocity, (V) taken from Figure 3-1 Project: Drill Green USR Rational Equation: Q= ciA Date: June 27, 2015 Upstream Overland Flow Gutter/Pipe Flow Swale Flow Time of Design Basins Concentration Area, A Runoff Point (acres) Coefficient Length,L Slope,S Ti Length,L Slope,S Velocity,V T, Length,L Slope,S Velocity,V Intensity,i Flow,Q Te c C5 (ft) (%) (min) (ft) (%) (fps) (min) (ft) (%) (fps) T` T` (rninl Do (m/hr) (cfs) 1 1 0.0 35.00 0.38 0.10 300 3.4 20.8 1068.0 1.3 2.34 7.6 0.0 0.0 0.00 0.0 28.4 4.64 61.7 S:\PROJECTS\DRL\DRNG\DRL-Runoff.wpd Page 4 of 4 Wohnrade Civil Engineers, Inc. Preci pi tati on Frequency Data Server http://hdsc.nws.noaa.gov/hdsc/pfds/pfds_pri ntpage.html ?I at=40.1796& I o... NOAA Atlas 14, Volume 8, Version 2 ,,,,u� "IC OF _''� y '`'w.,�� Location name: Platteville, Colorado, US* noflR N Latitude: 40.1796°, Longitude: -104.7765° e %. T. s/ Elevation: 4951 ft* �:.4 eT a°`P * source: Google Maps '`"mr+ rrc: POINT PRECIPITATION FREQUENCY ESTIMATES Sanja Perica, Deborah Martin, Sandra Pavlovic, Ishani Roy, Michael St. Laurent, Carl Trypaluk, Dale Unruh, Michael Yekta, Geoffery Bonnin NOAA, National Weather Service, Silver Spring, Maryland PF tabular I PF graphical I Maps & aerials PF tabular PDS-based point precipitation frequency estimates with 90% confidence intervals (in inches)1 Average recurrence interval (years) Duration 1 2 5 10 25 50 100 200 1500 1000 5-min 0.236 0.286 0.383 0.478 0.630 0.763 0.911 1.08 1.32 1.52 (0.186-0.300) (0.226-0.364) (0.302-0.489) (0.374-0.613) (0.485-0.864) (0.568-1 .05) (0.653-1.29) (0.737-1.56) (0.864-1.96) (0.960-2.27) 10-min 0.345 0.419 0.561 0.700 0.922 1.12 1.33 1.58 1.93 2.22 (0.273-0.439) (0.331-0.533) (0.442-0.716) (0.548-0.898) (0.710-1.26) (0.832-1 .54) (0.956-1.89) (1 .08-2.29) (1 .26-2.88) (1.41-3.32) 15-min 0.421 0.511 0.685 0.854 1.13 1.36 1.63 1.92 2.35 2.71 (0.333-0.535) (0.403-0.650) (0.539-0.873) (0.668-1.09) (0.865-1.54) (1.01-1.88) (1.17-2.30) (1.32-2.79) (1.54-3.51) (1.71-4.05) 30-min 0.568 0.686 0.916 1.14 1.51 1.83 2.19 2.58 3.17 3.65 (0.449-0.721) (0.541-0.872) (0.721-1.17) (0.893-1.46) (1.16-2.07) (1.36-2.52) (1.57-3.09) (1.77-3.76) (2.08-4.73) (2.31-5.46) 60-min 0.697 0.834 1.11 1.39 1.84 2.24 2.69 3.20 3.95 4.58 (0.551-0.886) (0.659-1.06) (0.873-1.42) (1.08-1.78) (1.42-2.53) (1.67-3.10) (1.93-3.82) (2.20-4.66) (2.60-5.90) (2.90-6.84) 2-hr 0.826 0.983 1.30 1.63 2.17 2.65 3.20 3.82 4.74 5.50 (0.659-1.04) (0.784-1.24) (1.03-1.65) (1.29-2.07) (1.69-2.96) (2.00-3.64) (2.32-4.50) (2.65-5.50) (3.15-6.99) (3.52-8.12) 3-hr 0.900 1.06 1.40 1.75 2.33 2.85 3.45 4.12 5.12 5.96 (0.722-1.13) (0.851-1.33) (1.12-1.76) (1.39-2.20) (1.83-3.17) (2.17-3.89) (2.52-4.81) (2.88-5.90) (3.42-7.51) (3.84-8.73) 6-hr 1.06 1.24 1.60 1.98 2.61 3.18 3.83 4.57 5.66 6.58 (0.859-1.31) (1.00-1.53) (1.29-1.99) (1.59-2.47) (2.07-3.51) (2.44-4.29) (2.83-5.28) (3.22-6.45) (3.82-8.19) (4.28-9.50) 12-hr 1.27 1.48 1.91 2.32 2.98 3.56 4.20 4.92 5.97 6.84 (1.03-1 .55) (1.21-1.82) (1.55-2.34) (1.87-2.86) (2.37-3.91) (2.74-4.71) (3.12-5.69) (3.50-6.83) (4.07-8.50) (4.50-9.77) 24-hr 1.50 1.77 2.26 2.72 3.42 4.01 4.66 5.37 6.38 7.21 (1.24-1 .82) (1.46-2.15) (1.86-2.75) (2.22-3.32) (2.73-4.39) (3.11-5.21) (3.48-6.19) (3.84-7.32) (4.38-8.93) (4.79-10.1) 2-day 1.71 2.06 2.66 3.18 3.94 4.55 5.20 5.87 6.80 7.54 (1.42-2.05) (1.71-2.47) (2.21-3.20) (2.62-3.85) (3.15-4.95) (3.55-5.79) (3.91-6.77) (4.23-7.85) (4.71-9.34) (5.07-10.5) 3-day 1.87 2.23 2.84 3.37 4.13 4.75 5.40 6.08 7.02 7.76 (1.56-2.23) (1.86-2.65) (2.36-3.39) (2.79-4.04) (3.32-5.16) (3.73-6.00) (4.09-6.98) (4.41-8.07) (4.89-9.56) (5.26-10.7) 4-day 2.00 2.35 2.96 3.50 4.27 4.89 5.54 6.23 7.18 7.94 (1.68-2.37) (1.98-2.79) (2.48-3.53) (2.91-4.18) (3.45-5.30) (3.85-6.15) (4.21-7.13) (4.54-8.22) (5.03-9.73) (5.40-10.9) 7-day 2.29 2.67 3.32 3.88 4.68 5.32 5.97 6.66 7.60 8.33 (1.94-2.69) (2.26-3.14) (2.80-3.92) (3.26-4.60) (3.80-5.74) (4.22-6.60) (4.57-7.59) (4.89-8.68) (5.36-10.2) (5.72-11.3) 10-day 2.54 2.95 3.64 4.23 5.05 5.70 6.36 7.04 7.97 8.68 (2.16-2.96) (2.51-3.45) (3.09-4.27) (3.56-4.98) (4.12-6.14) (4.54-7.01) (4.89-8.01) (5.20-9.10) (5.65-10.6) (6.00-11.7) 20-day 3.24 3.72 4.51 5.16 6.06 6.76 7.45 8.15 9.08 9.79 (2.79-3.74) (3.20-4.30) (3.86-5.23) (4.39-6.01) (4.98-7.25) (5.43-8.19) (5.79-9.23) (6.07-10.4) (6.51-11.9) (6.84-13.0) 30-day 3.80 4.34 5.23 5.96 6.94 7.69 8.43 9.18 10.1 10.9 (3.28-4.36) (3.75-4.99) (4.50-6.02) (5.10-6.88) (5.73-8.22) (6.21-9.24) (6.59-10.4) (6.88-11.6) (7.31-13.1) (7.64-14.3) 45-day 4.47 5.12 6.16 7.00 8.13 8.97 9.79 10.6 11.6 12.4 (3.88-5.09) (4.45-5.84) (5.33-7.04) (6.03-8.04) (6.75-9.54) (7.29-10.7) (7.69-11.9) (7.99-13.2) (8.44-14.9) (8.78-16.1) 60-day 5.01 5.77 6.97 7.93 9.20 10.1 11.0 11.9 13.0 13.8 (4.38-5.69) (5.03-6.55) (6.06-7.93) (6.86-9.06) (7.65-10.7) (8.26-12.0) (8.70-13.3) (9.01-14.8) (9.47-16.5) (9.82-17.9) 1 Precipitation frequency (PF) estimates in this table are based on frequency analysis of partial duration series (PDS). Numbers in parenthesis are PF estimates at lower and upper bounds of the 90% confidence interval. The probability that precipitation frequency estimates (for a given duration and average recurrence interval) will be greater than the upper bound (or less than the lower bound) is 5%. Estimates at upper bounds are not checked against probable maximum precipitation (PMP) estimates and may be higher than currently valid PMP values. Please refer to NOAA Atlas 14 document for more information. Back to Top PF graphical 1 of 4 6/27/2015 6:09 PM Precipitation Frequency Data Server http://hdsc.nws.noaa.gov/hdsc/pfds/pfds_pri ntpage.html ?I at=40. 1796& I o... PDS-based depth-duration-frequency (DDF) curves Latitude: 40.1796°, Longitude: -104.7765° 14 1 1 1 1 1 1 1 1 Average recurrence 12 interval (years) 10 • — 1 o_ 2 8 — 5 o • — Ii all6+., •Q •4 -ci. : • — 0 c c c c c t- t- t- I- 6- >, >, >, >, >, >, >, >, >, •c E E ppE EE N r,, th L', 4 v v v -`°v� v v 7�ro -o -o LA O- r--1 M �0 N N r•11 [1• r, O O6 M LA Q VD Duration 14 1 1 1 1 r 1 • 12 - • 10 • - Duration s an, — 5-man — 2-day -a 8 c • — 10-min — 3-clay o 15-rnin — 4-day ea 6 •�'- — 30-man — 7-day a • • — 60-man — 10-day 2 4 co. - — 2-hr — 20-day • — 3-hr — 30-day 2 • - - -- — 6-hr - 45-day : — 12-hr — 60-day 0 - 24-hr 1 2 5 10 25 50 100 200 500 1000 Average recurrence interval (years) NOAA Atlas 14, Volume 8, Version 2 Created (GMT): Sun Jun 28 00:09:28 2015 Back to Top Maps & aerials Small scale terrain TV Medicine Bow National Forest t'Y1 C Laramie 4'_y -'s't'y 1 .- ! - - Cheyenne- - - I - - - - - ® - - - - - - \4Steamboat , • +Fort Collins Pawnee National o • Springs .-� �`�'+ S o Grassland Sterlin i 4 ti I ;a k.4 t\ o ( r I `•lij f . . Boulder I t+'r-e 1 '�• , ). 0.-,4'6ia. 4 ,�. :..:'.n__..__ 50 km 1 Map d ReporlCamaper:ore 2 of 4 6/27/2015 6:09 PM Precipitation Frequency Data Server http://hdsc.nws.noaa.gov/hdsc/pfds/pfds_pri ntpage.html ?I at=40. 1796& I o... Large scale terrain `• Platteville H1 O' i 30 0 ?8 D I i----3-3-1 V 26 ® I i 37 31 r , r_-(lr srib_ C3 ® 0 - r 2 km u Map d Report a map error Large scale map 13? I N., Platteville 35 0 30 0 1 I 33 ..e E3 I IP 3T Ell l, ?? ii 2 km ' 1 Map d Report a map error Lane scale aerial _ — j - - -VI Ilk. ,t ), ; -El . . ,. , . ... . • _ . . ilkaott; 4. .- : . ,ii 4 Is , . ., 4.,. , - ., \IS il. . . riuk . OAP • . - - . , , r. •• , . a ,, _ , . . ,ati _ { ._ .wet. ..) 8 41 I M 0 mit Y Googl till 1 ' J 1 ,1'.4 2 km '__.i Imagery©. Report a map error 3 of 4 6/27/2015 6:09 PM Precipitation Frequency Data Server http://hdsc.nws.noaa.gov/hdsc/pfds/pfds_pri ntpage.html ?I at=40. 1796& I o... Back to Top US Department of Commerce National Oceanic and Atmospheric Administration National Weather Service Office of Hydrologic Development 1325 East West Highway Silver Spring, MD 20910 Questions?: HDSC.Questions(a noaa.gov Disclaimer 4 of 4 6/27/2015 6:09 PM User Name : admin Date : 06-27 - 15 Project : AKR - Akron Transportation Center Time : 18 : 31 : 31 Network : 00 - Page : 1 Rainfall Report Rainfall Type Western Rainfall Library DLR Western Precipitation 2yr/ 6hr 1 . 24 in 2yr/ 24hr 1 . 77 in 100yr / 6hr 3 . 83 in 100yr / 24hr 4 . 66 in Elevation 4960 . 00 Rainfall Intensity ( in/hr ) 5 min 15 min 30 min 60 min 6 hr 24 hr 2 yr 2 . 90 1 . 90 1 . 32 0 . 83 0 . 21 0 . 07 5 yr 4 . 64 3 . 04 2 . 11 1 . 33 0 . 31 0 . 10 10 yr 5 . 80 3 . 80 2 . 63 1 . 67 0 . 38 0 . 12 25 yr 7 . 31 4 . 79 3 . 32 2 . 10 0 . 47 0 . 15 50 yr 8 . 70 5 . 70 3 . 95 2 . 50 0 . 56 0 . 17 100 yr 10 . 03 6 . 57 4 . 55 2 . 88 0 . 64 0 . 19 BDE Values Intensity = B/ ( Tc + D ) AE B D E X Y 2 yr 22 . 68 9 . 12 0 . 78 0 . 00 0 . 00 5 yr 36 . 26 9 . 12 0 . 78 0 . 00 0 . 00 10 yr 45 . 32 9 . 12 0 . 78 0 . 00 0 . 00 25 yr 57 . 10 9 . 12 0 . 78 0 . 00 0 . 00 50 yr 67 . 96 9 . 12 0 . 78 0 . 00 0 . 00 100 yr 78 . 38 9 . 12 0 . 78 0 . 00 0 . 00 .50 20 10 E a _o 6 .06 a) cn ma .04 1m b J a err .02 01 .005 1 2 4 6 10 2.0 Average velocity (ft/sec) EQUATION FOR FIGURE 3- 1 : PAVED: V=2O.3282(s)°.5 (210-VI-TR-55, Second Ed., June 1986) UNPAVED: V= 16. 1345(s)° 5 s= slope in ft/ft Proj DRL.ect:1505.00 \ I FIGURE 3-1 WOHNRADE C/V/L ENGINEERS, /NC,06/27/15 AVERAGE VELOCITIES Sheet FOR SHALLOW 11582 eld,Colo y Colorado, Scale: roomfi Co%rodo, 80021 N.A. Phone: (720)259-0965, Fox: (720)259-1519 �� Designed By: CONCENTRATED FLOW 1 ` N.A. 2 K J J 'Sheetsj c Appendix B Water Quality Feature Calculations Weld County Planning Services/Engineering Date ######## Enter Project Name : Drill Green Enter Case Number: PRE15-0072 Surface Area (SF) Area (acres) % Impervious i Roof 20,000 0.46 90% 0.9 Paved 0 0.00 100% 1.0 Gravel/Crushed Asphalt 63,589 1.46 40% 0.4 Grass/Undeveloped 33 .08 2% 0.02 Total Site (Acres) 35 Note: 1 ac = 43,560 sf Weighted Imperviousness (i) = 0.047 WQCV=a*(0.911' - 1. 19r 2 +0. 78x) 6-hr drain time a = 0.7 12-hr drain time a = 0.8 — 24-hr drain time a = 0.9 4O-hr drain time a = 1 .0 Water Quality Calulation Volume (WQCV) = 0.0344 Required storage = WQCV (Area) 12 Required storage = 0.1003 acre*feet 4,369 cu ft WQCV Stage-Storage Rating Project : Drill Green USR Basin Description : WQCV Pond Contour Contour Depth Incremental Cumulative Incremental Cumulative Elevation Area ( ft ) Volume Volume Volume Volume ( sq . ft ) Avg . End Avg . End Conic Conic ( cu . ft ) ( cu . ft ) ( cu . ft ) ( cu . ft ) 4 , 952 . 00 1 , 982 . 18 N/A N/A 0 . 00 N/A 0 . 00 4 , 952 . 10 2 , 784 . 91 0 . 10 238 . 35 238 . 35 237 . 22 237 . 22 4 , 952 . 20 3 , 697 . 47 0 . 10 324 . 12 562 . 47 323 . 04 560 . 26 4 , 952 . 30 4 , 711 . 96 0 . 10 420 . 47 982 . 95 419 . 45 979 . 71 4 , 952 . 40 5 , 828 . 27 0 . 10 527 . 01 1509 . 96 526 . 02 1505 . 73 4 , 952 . 50 7 , 046 . 38 0 . 10 643 . 73 2153 . 69 642 . 77 2148 . 50 4 , 952 . 60 8 , 366 . 24 0 . 10 770 . 63 2924 . 32 769 . 69 2918 . 19 4 , 952 . 70 9 , 787 . 90 0 . 10 907 . 71 3832 . 03 906 . 78 3824 . 97 4 , 952 . 80 11 , 311 . 37 0 . 10 1054 . 96 4886 . 99 1054 . 05 4879 . 02 4 , 952 . 90 12 , 936 . 64 0 . 10 1212 . 40 6099 . 39 1211 . 49 6090 . 51 Required WQCV= 4 , 369 cu- ft @ elevation= 4952 . 75 DAu/a H SARCNET ZONING: AGRICULTURAL EXISTING O/L/G4S IX/SANG PROPERTY LINE WELL HEAD I V� I f 1 SECAON UNES in I� 4 5 1097. 6" 1 _ �i9 \\ / 1 \\// „,\/ / f / ` \ \ \ ` i 200' 0/4/GAS I Q SETBACK RADIUS 1 i O N. JI �,j ��V 1 1 \ ` ) I 225.00' `l PUBLIC SERl9CE 1 1 1 l COMPANY 111 ` 1 ; 1 I I1 —"se9ss _ _ J \ ` / I1 //��5� i ` 1 PEEX/SUNY J \ \ N N. N \ / 1 \ y l I I 111 LINE \ \ \ / / I I I I II 1 EX/SANG PROPERTY L/NE I I 1I --_ \ 35.0 ift Ct 495 1. 73 / I 1�, Eck vh 1 / / / / II � y / / , / II � a Q 3 O � g5 �5 / / / ( ( ' I i II cc Le i4g5 Ng / i 1 fr) l "� � � / / 1 I1 q / I1 / • / / N h To / EX/S11NG DIRT —/ Q / AGRICULTURAL DRIVE � / / 1 cb . ` \ / 1 EX/SANG CATTLE I 1 / GUARD W/ / I \\ I r ENST/NG FENCE POSTS I ACCESS 047E �` / SETBACK RADIUS \ � �1 •� / TO REJILA/N I 1 t._Q-3 _____J)I 1,2 hh TY 1\11 EX/SANG I \\� 1 / \ EX/SANG DIRT -/ \ ACCESS POINT�4 I N / EX/SRNS OIL/CAS GR/CULTURAL DRAT N.\ EX/SPNG'CATTLE WELL HEAD EX/ST/NG ELECTRIC J CABINDOSTTETS ELECTRIC I _ _ GUARDNARKING SIGN A �h -- QcJ / \ W� LOT B II W¢ ±35.01 AC (NET/GROSS) 1 HISTORIC BASIN 1 N BOUNDARY I I PROPOSED USR LOT A BOUNDARY LINE I UNDEVELOPED AGRICULTURAL I 2-26.37 AC (GROSS) 2-25.94 AC (NET) x /Project: \ 1/ DR/LL GREEN LLC ' r r Dat 1505.00 USE B Y SPEC/AL REVIEW Date: WOHNRADE C/V/L ENGINEERS, INC,, �+ 07/03/15 Sheet H/S TOR/C 11582 Colony Row Scale: Broomfield, Colorado, 80021 btf€-' 1 a=100' Phone: (720)259-0965, Fax. (720)259-1519 — w Designed By: DRA/NA GE PLAN : LJ „um, / \ 2 \ / \Sheet/ DAVID H SARCHET ZONING: AGRICULTURAL EXISTING O/L/G4S WELL HEAD IX/SANG PROPERTY LINE HYDRAULIC FRACTURING TANK STORAGE 50 STALES O12'Wx140D I �l I I SECAON UNES 20.00' J1 iIIIIIHHIIIIIIHHII HilillIIIIII IiIIIIIIIHI 1o97.�s J I �ItI) i CI:( � \ 20' % 225 / OUTDOOR STORAGE AREA \ N 1 / 200' o/L/G4s I PROPOSED QLO SETBACK RADIUS I I PORTABLE 70/LET ` ` \ ` r — O /ci, IT I 200' 0 200' 500' �i SUPREPLLYyAWELL R �� PROPOSED 20,000 SF CO S� S7EEZ BUILDING O w • k v, I 225.00' G1 I �I PUBLIC SERVICE (OFF/CE/STORAGE) o I 1 �n COMPANY PROPOSED 6}/ / 24' 1 1 \ • CHAIN LINK ` EXISTING FENCE W/TH :`':;<r::: ,a I 6000' L/GHANC x"S .,.:;:. "_r.: 'z; I1 R.O.W. ....:.... . s ` , I I*30.00' 5 CRIED ENTRANCE R76.00' 1 EX/SANG => .:.`.. .: . ...: :.:: _ ("• PROPERTY 4 OUTDOOR - ...- :1:. I I } i I I'LL; L/N£ . .. ._. _ I £X/SANG PROPERTY L/NE C] STORAGE AREA , . . ': 225.53 ;' :: .. ..,..'.:;..• ;" :...: ' . I 1 ; < :.:: .::: ,::.- 35.0 rr OUTDOOR STORAGE 14.00'w 1 ''.1r; AREA 1 1 BERM .:; ?::_- -:: e l 4-PROPOSED DOWN CAST FENCE I W ,.... MOUNTED SECURITY L/GH17NG ': / 250' _ O 495�. 73 w ( 0� PROPO ED PARK/NC A�Ea wrrH — — i 147.43' z Irv" N h GRAVEL SURFACE (106 SPACES 8:1 ALL Ste) U N ) �0) 9 w X 1B2) UM/15 or ON-S/T£ \V r4 < MATERIAL STORAGE AREA/ I I f aI IN cl 3 / FUTURE /ND/V/DUAL SEWAGE DISPOSAL O / LOCATED/N AN UND/S7URBE0 A / I tri Nig5 �g� it _ ! / 1�I to II IQ I £X/SANG FENCE �3 PROPOSED WATER QUALITY FEATURE I POSTS TO BE I O NO BU/LO/NC OR STORAGE /N A1/S AREA / RELOCATED (TYP) MINIMUM STORAGE VOLUME= A 369 CU-FT PROPOSED GRAVEL ACCESS DRIVE 7 620 SF OF RECYCLE j` (2 LANES P 12'w EACH) /, ASPHALT/ROAD BASE, J 2D SURFACE AREA= 70.579 SF / 63,430 SF (1.46 AC)/ • ` PROPOSED GRAVEL PAI'7NG / i M/N/MUM 300' IN LEN Q C POND DOES NOT CONTA/N AN OUTLET • (LIMITS SHOWN HATCHED) LO STRUCTURE STORMWAT£R WILL DISCHARGE1. (L/M/75 SHOWN SHADE IN l() `OVER THE TOP OF THE EMBANKMENT AT / EX/SANG DIRT J (`i,,) / 0) 0) - AN EZEVA AON OF 49530. / AGRICULTURAL DRIVE �_ - - STAB/L/ZE POND USING A/E SEED M/X �iJ' RECOMMENDAAONS SHOWN ON 1N/S PLAN O // \ 24' EX/SANG CATTLE / 1 GUARD W/ 1,1 / �\ I r El%SANG FENCE POSTS I ACCESS GATE / 750 014/GASI / SETBACK RADIUS , \ TO REMA/N (7YP) 300.00' Y ( ___---Ic,le! I1 �('J I 13) R30.00' Rip..DO' EX/SANC / PROPERTY \\� 1 / \ EX/SANG DIRT - \ / ACCESS PO/NT N / EXISANG O/L/GAS �4GR/CULTURAL OR/t£ \ JEV I I \N EX/SAAIC/CATTLE °ELL HEAD EX/SAN� ELECTRICCAB SIN ELECTRIC 4 _ WNW WAR/1ING SIGN � I-... --•Cl 1 I tk V et I LI x LOT B CC ; I235.01 AC (NET/GROSS X) DEVELOPED BASIN I N BOUNDARY X ._ N 90 00'0 1096.70' e_r_ .....1- ® ® I PROPOSEI " LOT A BOUNDARY USR I I /NE I I UNDEVELOPED AGRICULTURAL x 2-26.37 AC (GROSS) K... x 2-25.94 AC (NET) I i ...} /Project: \ 1 DRILL GREEN LLC C ' r r DRL: 1505.00 USE B Y SPEC/AL REVIEW Date: WOHNRADE C/V/L ENGINEERS, INC,, �+ 07/03/15 Sheet DEVELOPED 11582 Colony Row scale: Broomfield, Colorado, 80021 1"=100' Phone: (720)259-0965, Fax: (720)259-1519 — w Designed By: DRA/NA GE PLAN : 2 \MBW / ` J 2 \Sheet Hello