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Home My WebLink About20102420.tiff SITE SPECIFIC DEVELOPMENT PLAN AND USE BY SPECIAL • REVIEW (USR) APPLICATION FOR PLANNING DEPARTMENT USE DATE RECEIVED: RECEIPT#/AMOUNT# /$ CASE#ASSIGNED: APPLICATION RECEIVED BY PLANNER ASSIGNED: Parcel Number 1 3 0 9 _ 0 9 _ 0 _ 0 0 _ 0 1 2 (12 digit number-found on Tax I.D.information,obtainable at the Weld County Assessor's Office,orwww.co.weld.co.us.) Legal Description LOT A,RE-828,PT SW4 , Section 9 , Township 2 North, Range 66 West Flood Plain: N/A Zone District:A , Total Acreage:3.34 , Overlay District:N/A Geological Hazard: N/A ,Airport Overlay District: N/A FEE OWNER(S) OF THE PROPERTY: Name:WHITE BEAR MANAGEMENT,LLC Work Phone # Home Phone # Email Address:P O BOX 1183 Address: City/State/Zip Code BRIGHTON,CO 80601 Name: Work Phone # Home Phone # Email Address: Address: • City/State/Zip Code Name: Work Phone # Home Phone # Email Address: Address: City/State/Zip Code APPLICANT OR AUTHORIZED AGENT (See Below: Authorization must accompany applications signed by Authorized Agent) Name:POLAR GAS FRONT RANGE,LLC(APPLICANT);CIVIL RESOURCES,LLC CO DANNA ORTIZ(AGENT) Work Phone # 303.833.1416 X203 Home Phone # Email DANNA@CIVILRESOURCES.COM Address:PO BOX 680 Address: City/State/Zip Code FREDERICK,CO 80530 PROPOSED USE: INSTALL AND UTILIZE PROPANE TANK(S) 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 the application. If a corporation is the fee owner, notarized evi ce must be pckaed dicating th the s' natory has to legal authority ign for ti.- cor ation. • qT� / -- F- - zc�Cb.�Z !LL //yyl4t._ &I-ern Signatfure: Oww�ryryeer or Au oriz 0.gent Date Sig ture:urp Owner or Authorized Agent ate — kJ '.L-b. 4rji GCC t5�wt. 3t^,)f -7,1e,_C(,G �C 2010-2420 • 'ecial Review Use Questionnaire• • 1. Explain, in detail,the proposed use of the property. Sam Reed, owns and operates Polar Gas Front Range LLC (Polar Gas) with his two sons Nathan and Chris. The Reed family has run the company since 1960. They would like to install several 30,000 gallon propane storage tanks at 14095 Weld County Road 22, to provide short-term propane storage as they do not have room to expand at their Brighton location. Each tank is approximately 60' long by 10' wide and would be placed five feet apart according to the guidelines established in National Fire Protection Association standards for propane storage (refer to the map for details). Polar Gas will also seek approval from the State of Colorado, Division of Oil and Public Safety. 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 the following goals and policies in the Weld County Comprehensive Plan: • G.A.Goal 7. County land use regulations should protect the individual property owner's right to request a land use change. • A.Policy 7.1. County land use regulations should support commercial and industrial uses that are directly related to, or dependent upon, agriculture, to locate within the agricultural areas, when the impact to surrounding properties is minimal, or can be mitigated, and where adequate services are currently available or reasonably obtainable. • A.Policy 2.2. Allow commercial and industrial uses, which are directly related to or dependent upon agriculture,to locate within agricultural areas when the impact to surrounding properties is minimal or mitigated and where adequate services and infrastructure are currently available or reasonably • obtainable. These commercial and industrial uses should be encouraged to locate in areas that minimize the removal of agricultural land from production. The proposed propane storage tanks will enable Polar Gas to expand their propane business, which provides an important service to many residential, agricultural and commercial businesses in Weld County. Because the property will be merely used to store propane tanks, no services are necessary and the impact on surrounding properties is negligible. In addition, the proposed tanks will be located in an area that does not contain any productive agricultural land. 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. The intent of the A (Agricultural)Zone District is "to provide areas for the conduct of agricultural activities and activities related to agriculture and agricultural production without the interference of other, incompatible land uses [and]...to provide areas for the conduct of uses by Special Review which have been determined to be more intense or to have a potentially greater impact than uses Allowed by Right." Installing and utilizing propane storage tanks is an appropriate use in an agricultural area. In fact, many of the farms and ranches in the area rely on propane. It could be argued that this proposed use will have less of an impact on the surrounding area than the oil and gas operations and agricultural uses in the area because this use will typically generate less noise, dust, traffic and waste. • Polar Gas I Use by Special Review 1 • Special Review Use Questionnaire • 4. What type of uses surround the site (explain how the proposed use is consistent and compatible with surrounding land uses). The proposed use is consistent and compatible with the surrounding land uses, which are primarily agricultural in nature. There are also numerous oil and gas facilities in the area, which would have relatively similar traffic to the proposed propane tanks. 5. Describe, in detail,the following: a. Number of people who will use this site The only time someone will be on the site is to fill the fuel tanks or to pick up fuel for delivery. Refer to the response to question 5.f. below for details. b. Number of employees proposed to be employed at this site Refer to the response to question 5.f. below for details. c. Hours of operation It is anticipated that loading will only occur during daylight hours, Monday through Friday. d. Type and number of structures to be erected (built)on this site There will not be any buildings associated with the tank storage—Polar Gas is not relocating any office space or business operations and the existing shop and home are not related to Polar Gas and will not be used in conjunction with the storage tanks. • e. Type and number of animals, if any,to be on this site Not applicable. f. Kind of vehicles (type, size, weight)that will access this site and how often Traffic at the site will be nominal. Most of the propane that will be stored in the tanks will come in 10,000 gallon trucks from EnCana Midstream, Inc., which is located at 16157 Weld County Road 22, approximately 2 miles east of the site. These vehicles are typically 60-feet long, semi-trucks (approximately 80,000 pounds). Typically, during peak season, each storage tank would be filled every other day. Sixty to seventy percent of Polar Gas' business occurs from November through February. During this timeframe, it is anticipated that there will be three delivery vehicles (33,000 pound gross vehicle weight rating)obtaining propane per tank per day. Note that Polar Gas only plans to install one tank in the near future. g. Who will provide fire protection to the site The Platteville-Gilcrest Fire Protection District(PGFPD)serves this property. Polar Gas has been coordinating with PGFPD and will ensure that the tanks are installed in accordance with National Fire Protection Association standards for propane storage. h. Water source on the property(both domestic and irrigation) Not applicable,there is no need for water service on the property as the drivers should not be on the site for more than forty-five minutes. Also, please note that the existing residence is not included within the USR boundary. i. Sewage disposal system on the property(existing and proposed) • Not applicable, there is no need for sewage disposal on the property as there are no buildings proposed and it will be rare for someone to be on the site more than forty-five minutes. Polar Gas I Use by Special Review 2 Special Review Use Questionnaire • j. If storage or warehousing is proposed,what type of items will be stored Propane gas will be stored on the property. 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 additional landscaping is needed as the site is already well vegetated and landscaped with trees along WCR 22. Polar Gas will install an 8' tall privacy fence in front of the tank area to screen the tanks from the public right-of-way. Refer to the Conceptual Site Plan Map for the locations of the trees and the proposed fence. 7. Explain any proposed reclamation procedures when termination of the Use by Special Review activity occurs. If the propane storage tanks were no longer needed, the tanks and their foundations would be removed and the site would be seeded if necessary. 8. Explain how the storm water drainage will be handled on the site. No drainage improvements should be necessary as we are not proposing any changes to the amount of impervious surface on the site. Refer to the attached Existing Contour Map for the general directions that the site drains. 9. Explain how long it will take to construct this site and when construction and landscaping is scheduled to begin. Not applicable. There is no major construction or planned for the site and landscaping is not necessary. 10. Explain where storage and/or stockpile of wastes will occur on this site. Not applicable. Polar Gas ( Use by Special Review 3 CIVIL RES'IJRCES, IIC: ENGINEERS 6 PLANNERS • MEMORANDUM DATE: August 2, 2010 TO: Kim Ogle, Department of Planning Services FROM: Mickey Leyba-Farnsworth and Danna Ortiz SUBJECT: Polar Gas USR-1746 Project No.: 10-207.002 Response to Planning Department July 30, 2010 Comment Review Email Per your June 30,2010 Referral Comments letter,we received responses with comment from the Division of Water Resources, Weld County Building Department,Public Works Department and Public Health and Environment Department. Of those responses, only the Departments of Public Works and Public Health and Environment required additional information. We have been coordinating directly with these departments to resolve their concerns. We have attached our correspondence for your information. Please note that Public Works indicated that they could not review our submittal until approximately the second week in August,but that they did not feel that there was a need to postpone the September 7,2010 hearing. Following is our response your July 30, 2010 email. EMAIL COMMENTS: • 1. In conversation with Public Works, there apparently has been a modification to the Site Plan. As the referral agencies did not review this component, depending on the modification, staff may request referral agency review. We made the following minor revisions to respond to the comments that we received from the Public Works and Public Health and Environment departments. • We reduced the proposed number of propane tanks from 11 to six. • We labeled the entire existing water quality area rather than just a portion of it. We have also added a fence on the north side of the tanks to address your concern that the proposed fence only screens the tanks from the public right-of-way(which is what the regulations require). 2. Another issue that appears to be a moving target is the number of truck trips to the site, the application materials indicated 3, Public Works received notice from you that there are four vehicles/tank that visit the site. There is no mention of the number of trucks that deliver the propane to the site. What is the number and when does delivery take place? Also, what is the number of truck vehicle trips/tank and/day? As we stated in our May 19th letter to you, the proposed tanks will typically be filled by EnCana Midstream, Inc., which is located at 16157 Weld County Road 22, approximately 2 miles east of the site. Typically, during peak season (60%to 70% of Polar Gas' business occurs from November through February) each storage tank would be filled every other day and it will likely take one truck per storage tank. All tanks will be connected so that they can be filled and emptied from one location. Each tank will have its own loading/unloading station. A transport truck will pull up to the tank (while remaining on the access drive) and attach its liquid and vapor hoses to the tank. The truck will then unload its propane into the tank. A smaller truck or bobtail will come to load propane out of the tanks. During peak season, it is anticipated • that there will be three delivery vehicles obtaining propane per tank per day. So, for six tanks (full build out), during peak season we anticipate that there would be 21 trips per day or 3.5 trips per day for the initial tank. 323 FIFTH STREET• P.O. Box 680 • FREDERICK. CO 80530 • PHONE: 303.933.1415 • FAX: 303.833.2950 • 3. There apparently is a new issue with oil and gas access. Staff will require a written sign-off from the producers for access. In the Public Works Department's June 25, 2010 letter to you,their first comment states, "The applicant must provide access for the existing oil and gas access road through the property. The Weld County Code Oil and Gas Policies (Sec 22-5-100.B.3.)states, `Existing service roads should be used to provide access for oil and gas and other mineral extraction activities." As we stated in our May 19th letter to you,we do not believe that the oil and gas companies have the right to trespass through Polar Gas' property to access their facilities on the adjacent property. We believe that they should be required to use their existing service road that is north of this site. We are unclear what you mean by, "staff will require a written sign off from the producers for access." We hope that means that you are requiring the producers to prove that they have the legal right to access this property before they can continue to utilize it. It is not appropriate for the County to enable the producers to "sign off'on or approve this USR. Please clarify how you would like us to proceed. 4. What does go on in the big shed? The application is silent, except to state that it is not a part. Please provide additional comment The shed is associated with the household and contains vehicles and personal items. It will not be used in conjunction with this USR. 5. Visual inspection of the property identified several propane tanks on site. Will this product continue to be stored here? The fence apparently is only fronting the street, with disregard to adjacent property owners. How will this issue be addressed? These empty propane tanks are associated with the household, not this USR. It is my understanding that the County required the landowner to screen the tanks from the public right-of-way, which he did. In order to • address adjacent landowner Carol Gildea's concern that she will be able to see the proposed propane tanks associated with this USR, we have added a privacy fence along the north side of the proposed storage tanks. Refer to the attached map for details. 6. Environmental Health stated water and sanitary sewer service/leach field is required. Where will this occur and what evidence of a water supply do you have to present? Have you or your applicant made application for a leach field. Please provide follow-up comment. As we have stated in our May 19th letter to you and in conversations with Ms. Lauren Light, we strongly believe that this is an unreasonable request and we would like to discuss this condition with the Weld County Commissioners. We are not aware of any other sites with oil and gas storage tanks that have a restroom. The purpose of this USR is to place propane tanks on the property, which will require truck drivers (who are coming from offices between two and 11 miles away)to be on the site for up to 45 minutes. The tanks will primarily be used during the colder months of the year,when Polar Gas' customers need to heat their homes and/or businesses. 7. Perhaps the September 7, 2010 hearing date is premature, as apparently there are several outstanding issues to be addressed and to date there has been no follow-up correspondence provided to the Planning Department. Staff will evaluate the application on receipt of your Site Plan amendment and responses as previously requested. We do not believe that the outstanding issues can be resolved. In our conversations with Ms. Light, we have essentially agreed to disagree. We did reduce the number of proposed propane tanks at her request to decrease the potential need for a restroom and potable water. We also do not believe that the County has the right to mandate that we allow access through our property for a use that already has an existing legal access to their property. We apologize for the delay in corresponding with you; we were trying to resolve Public Works' issues and the Health Department's comments so that we could include letters from them in • our response to you. We appreciate your following up with us and expressing your concerns. 8/3/2010 Page 2 CIVII RFS" IJRCFS,I_IC ENGINEERS & PLANNERS • MEMORANDUM DATE: July 30,2010 TO: Lauren Light, Environmental Health Kim Ogle, Department of Planning Services FROM: Mickey Leyba-Farnsworth SUBJECT: Polar Gas USR-1746 Project No.: 10-207.002 Response to Health Department Review Comments, June 30, 2010 The following is our response to the Health Department's review memorandum dated June 30, 2010. REVIEW COMMENTS: The initial USR application requested a maximum of eleven 30,000 gallon propane storage tanks. The applicant has reduced the ultimate number of tanks on site to consist of six 30,000 gallon propane storage tanks at full build out. Permanent water and sanitary facilities: The Environmental Health Department stated that they consistently require permanent water and sanitary • facilities for facilities that operate on a full time basis. In an effort to meet the Health Department's concerns regarding permanent water and sanitary facilities,the applicant is proposing a maximum number of six propane storage tanks for the site. As previously stated in our initial submittal application, USR-1746 does not require potable, non-potable, or an individual sewage disposal system. Drivers entering the site for unloading and loading are at the site for maximum of 45 minutes. Typically, there will only be one employee on the site at one time. Typically, during peak season(October through March), each storage tank would be filled every other day. During this timeframe, it is anticipated that there will be three delivery vehicles obtaining propane per tank per day. CONDITIONS OF APPROVAL (Prior to Plat Recording): 1. The applicant shall submit a dust abatement plan for review and approval, to the Environmental Health Services, Weld County Department of Public Health & Environment. Response: The dust abatement plan for Polar Gas USR-1746 includes the following: The existing access drive is surfaced with recycled asphalt and includes a concrete curb section. The remainder of the USR boundary is encompassed with an existing 40 ft x 75 ft shop and native grasses. 2. Evidence of an application submitted to the Colorado Department of Labor and Employment Division (CDL&E), Oil and Public Safety in accordance with the Liquefied Petroleum Gas (LPG) rule 7 ccr 1101-15 (Effective September 1, 2005)shall be submitted to Environmental Health Services, Weld County Department of Public Health & Environment. Alternately, the applicant can provide evidence from the CDL&E, Oil and Public Safety Section that they are not subject to these requirements. Response: • The CDL&E, Oil and Public Safety LP-Gas Installation Application has been completed for Polar Gas- Front Range, LLC USR-1746. The completed application, including plot plan is attached for your reference. This application will be submitted to the Colorado Division of Oil and Public Safety concurrently with applying for a building permit with the Weld County Building Department. 323 FIFTH STREET • P.O. Box 580 • FREDERICK, CO 80530 • PHONE'. 303.833. 1416 • FAX: 303,833,2350 I A It I 'IiRI • 3. The applicant shall submit evidence of an Aboveground Storage Tank permit from the Colorado Department of Labor and Employment(CDL&E), Oil Inspection Section for any aboveground storage tanks located on the site. Alternately, the applicant can provide evidence from the CDL&E, Oil Inspection Section that they are not subject to these requirements. Response: An aboveground storage tank permit from the Colorado Department of Labor and Employment, Division of Oil and Public Safety is not required for USR-1746. Propane storage tanks are excluded from CDL&E, Division of Oil and Public Safety aboveground storage tank registration requirements. Section 3-1(b)(5)of the Division of Oil and Public Safety Storage Tank Regulations indicates that LP-Gas storage tanks are excluded from the regulation. 4. The applicant shall submit a waste handling plan,for approval, to the Environmental Health Services Division of the Weld County Department of Public Health & Environment. The plan shall include at a minimum, the following: 1) A list of wastes which are expected to be generated on site (this should include expected volumes and types of waste generated). 2) A list of the type and volume of chemicals expected to be stored on site. 3) The waste handler and facility where the waste will be disposed(including the facility name, address, and phone number). • Response: The proposed waste handling plan for Polar Gas USR-1746 includes the following: 1) Based on existing Polar Gas Front Range propane storage facilities,no waste is anticipated to be generated onsite. In the event any waste is generated from drivers at the site, it would include only household waste. 2) No chemicals are anticipated to be stored on site. The purpose of the USR is for propane storage only. Transport trucks will unload the propane into the storage tanks and a smaller trucks or bobtail will load propane out of the tanks. 3) Any household waste generated onsite shall be picked up by the same waste management company currently serving the existing residence on the parcel containing the USR boundary. Household waste shall continue to be picked up on a regular basis by: Gator Rubbish Removal 883 Baseline Pl. Brighton, CO 80603 303-655-0710 Planning services has requested we provide them with follow-up comments from agencies we have contacted concerning the issued referral comments. We would like to request your written approval or additional comments to our conditions of approval responses. Thank you for your assistance and we look forward to hearing from you. We would be happy to answer any questions or provide additional information. • 8/3/2010 Page 2 I I 1 II 1 6 EIH i :t I 1 �v "o i o 11 'I /////// / o ,o 1 I II Ea V� I • I �� 1 \V 1 :ES2 4 _ `—' I V / 6'.; � 1 I~ /- _ \< H . y . c. jFLi LTJ J O W u Y sss - F, LL V V • % .1 1 II PQ m 9�%� i �og ��a CII J 33 GC KZ MSC CC I — 2 H ./ 0,6 IogR 'V '- =" i Yk \ I i tO c4? ciM. I �, s :,..s, �n rw 12 f vi a I I � a � Boo � �� i T" � � I� o I n� nnnn I s„ II-I '• ` 0 8 iii II II w�N I 1 a 0.'i s N CO ₹ �1 ULI NII W U as o+ uuu \ \ q i 1 4- -� U P '4Ull� 8 E �, 1 0 ii 1 UCeb 19 w � c CI' OA' e, -. .. I ' O sq�Fw ~ US 00 ZSC M,/l,SL005 "', O- Q n 1 CIVIL RES13URCES, LLC ENGINEERS E. PLANNERS • MEMORANDUM DATE: July 28, 2010 TO: Heidi Hanson,P.E. Public Works Kim Ogle, Department of Planning Services FROM: Mickey Leyba-Farnsworth SUBJECT: Polar Gas USR-1746 Project No.: 10-207.002 Response to Public Works Review Comments,June 25, 2010 The following is our response to the Public Works review memorandum dated June 25, 2010. COMMENTS: Site Plat: 1. The applicant must provide access for the existing oil and gas access road through the property. The Weld County Code, Oil and Gas Policies (Sec22-5-100. B. 3.), states "Existing service roads should be used to provide access for oil and gas and other mineral extraction activities." • Response: An existing access road east of the USR property was the original service road providing access for oil and gas activities to the north. At the time the property was recently improved with the existing shop building and recycled asphalt drive, the oil and gas companies began accessing their facility through the applicant's property. There is currently no road sharing agreement with the applicant/property owner and mineral estate owners. We are in the process of contacting Kerr McGee and KP Kauffman regarding this issue and believe their oil and gas access road off of WCR 22 should be east of the property as it was historically. 2. The access drive shall be surfaced with gravel, recycled asphalt or the equivalent and shall be graded to prevent drainage problems. Response: The existing access drive serving the property is currently surfaced with recycled asphalt and includes a concrete curb section. The access drive is currently graded to prevent drainage problems and will be maintained accordingly. 3. There shall be no staging of vehicles/trucks on Weld County Roads. Response: Comment is noted. No vehicle/truck staging is proposed or required as a result of the proposed development. 4. The security gate is shown within the future right-of-way for WCR 22. If,in the future,WCR 22 was to expand the applicant would be responsible for moving the security gate outside of the right-of-way. Response: The applicant, Polar Gas Front Range acknowledges that the security gate will need to be relocated at their expense outside of the future WCR 22right-of-way in the event the roadway is expanded. • 5. Pursuant to Chapter 15, Articles I and II of the Weld County Code, if noxious weeds exist on the property or become established as a result of the proposed development,the applicant/landowner shall 323 FIFTH STREET• P.O. Box 680 • FREDERICK, 00 8053❑ • PHONE: 303.B33.1416 • FAX: 303.833.2850 CIVIL R65 aL 12O15 • be responsible for controlling the noxious weeds, All vegetation other than grasses needs to be maintained at a maximum height of 12 inches until the area is completely developed. Response: The applicant/landowner acknowledges they are responsible for controlling noxious weeds. As required by Section 23-3-250.B.7 of the Weld County Code, the property shall be maintained in such a manner that grasses and weeds will not be allowed to grow taller than twelve (12)inches and at no time will the growth of noxious weeds be permitted on the property. The removal of weed development over(12) inches in height will he maintained through frequent mowing of the property. Storm Water Drainage: 6. Please move the water quality area outside of the future right-of-way for WCR 22 and label the size of the Water Quality Area. Response: Per our email correspondence on 7/21/10, the USR Plat indentifies the entire existing water quality area and has been labeled as, "Water Quality Feature, No Build Area." The Historic Drainage Map includes the existing and ultimate water quality area. A water quality table including existing and ultimate volumes has also been added to the Historic Drainage Map. 7. Please add the following note to the plat: "Weld County is not responsible for the maintenance of drainage related features." Response: The note has been added to the plat under the Site Specific Development Plan Use by Special Review Permit Development Standards. A copy of the USR plat is attached for your reference. • 8. The historical flow patterns and run-off amounts will be maintained on site in such a manner that it will reasonably preserve the natural character of the area and prevent property damage of the type generally attributed to run-off rate and velocity increases,diversions,concentrations and/or unplanned ponding of storm run-off. Response: Comment is noted and acknowledged by the applicant/landowner. No site improvements are proposed with the development that would have the potential of historic run-off and velocity increases. • 7/29/2010 Page 2 .'*. -''�y� Dep `t of Labor&Employment-Div.of Oil&Public Safety—Oil Inspection Section 633 17"street,suite 500,Denver CO 80202 ••• •.,.• Phone 303-318-8533—E-mail ops.publiccafetvastate.Co.us—Web lifip://oos.cdle.state.Co.us • LP-CAS INSTALLATION APPLICATION OLP# Fee ID# Facility Name(location where tanks are to be installed) - StreetAddress City Zip Code 14095 County Road 22 Fort Lupton 80621 County Phone# Weld 303 918 5513 Directions to remote locations: US Highway 85 to Veld County Road 22,East roughly I mile to address on North side of road. Business Owner Name Phone# Polar Gas—Front Range,LLC 303 659 1806 Mailing Address City State Zip Code PO Box 187 Brighton CO 80601 Installation Contractor Name Phone# Polar Gas—Front Range,LLC 303 659 1806 Mailing Address City State Zip Code PO Box 187 Brighton CO 80601 Applicant a mail address nathanreed@polargas.com TYPE OF INSTALLATION:'MARK ALL THAT APPLY - '•,:. - .--_...::..'..'..__ :-:. X BULK PLANT INDUSTRIAL __CYLINDER FILL(NON METERED/SALE BY WEIGHT) AGRICULTURE METERED SALES(MOTOR FUEL/MOTOR HOME) SCHOOL FORKLIFT CYLINDER-COMPANY USE ONLY 0 OTHER •••__......... " - CONTAINER INFORMATION ' CONTAINER .. ..... 'CONTAINER WORKING YEAR ASMECODESYMBW. AG OR UC WATER CAPACITY -SiR1AL NUMBER NUMBER MANUFACTURER PRESSURE MANUFACTURED .. arn.m rimpf7. I Up to 6-30,000 To Be All Tanks To Be gallon tanks. Determined Approved By _ 2 State Oil 3 Inspector Prior To 4 Installation CONTAINER SUPPORT INFORMATION -`•. CONTAINERS/TANKS LARGER THAN 2000 GALLONS. . ..•'••-.• • . •':CONTAINERS/TANKS SMALLER THAN 2000` • ALI.CONTAINERS MUST BE PLACED ON MASONRY OR OTHER ALL CONTAINERS 3I1 51 BE PI.AS ED O\MASONRY OR OTHER NON('OMBI STIBI,E STRI'CTUR.U.SUPPORTS LOCATED ON CONCRETE NONCOMBUSTIBLI s FIWCTURAI.SUPPORTS LOCATED ON CONCRETE OR MASONRY FOUNDATIONS.NFPA 58 6.6.3 OR MASONRY FOUNDATIONS.NFPA 58 6.6.3 CONCRETE SADDLES CONCRETE FOUNDATION MORE THAN 12"ABOVE GROUND, _STEEL SADDLES.TANK BOTTOM LESS THAN 6"ABOVE FLAT TOP BOTTOM OF TANK 2"-12"ABOVE CONCRETE FOUNDATION CONCRETE FOUNDATION _4"TI LICK CONCRETE OR PAVED SURFACE,BOTTOM OF TANK _STEEL SADDLES TANK BOTTOM MORE THAN 6"ABOVE FLAT TOP LESS THAN 24"ABOVE CONCRETE OR PAVEMENT CONCRETE FOUNDATION(REQUIRED TO HAVE 1 HOUR FIRE _VERTICAL CONTAINER ON REINFORCED CONCRETE WITH 2 RATING ON STEEL SADDLES) HOUR FIRE RATING ON STEEL TANK SUPPORTS DISTANCE INFORMATION DISTANCE FROM CONTAINER TO: DISTANCE FROM POINT OF TRANSFER TO: BUILDING 80 Feet BUILDING 75 Feet ROAD 150 Feel PITS N/A RAILROAD N/A PROPERTY LINE 127 Eect _ PROPERTY LINE 127 Feet OUTDOOR PUBLIC ASSEMBLY N/A OVERHEAD ELECTRICAL LINE I50 Feet ROADS 150 Feet GAS OR DIESEL TAN N/A DRIVEWAYS 25 Feet CONTAINMENT DIKE ON GAS OR DIESEL N/A RAILROAD N/A GAS OR DIESEL DISPENSER AT VEHICLE FUEL STATION N/A GAS OR DIESEL DISPENSERS N/A VAPORIZER N/A GAS OR DIESEL FILL CONNECTIONS N/A CONTAINER SHUT OFF VALVES TO VAPORIZOR N/A GAS OR DIESEL TANKS N/A IIIAPORIZOR TO BULIDING N/A VAPORIZOR N/A APORIZOR TO PROPERTY LINE N/A OT DEMENSIONS Tbr polio 01:taneli•t is tls.I,',.tlrsm tshctc caun.ruou,and diaconn.elunts srr nmde or TYPE OF COLLISION PROTECTION Concrete Bollards where I.P-(ia'C.serue.I to the alnro.pb.ac Ili the coursc al tr:mslla operations. TYPE OF SECURITY Locked Valves Rev.1/09 • "0, Dept of Labor&Employment—Div.of Oil&Public Safety—Oil Inspection Section 2 633 17th street,suite 500,Denver CO 80202 'r-•„.'•• Phone 303-318-8533—E-mail ops.publicsafetvfehstate.co.us—Web httP://ops.cdle.state.co.us 11) plot plan sketch shoeing lot dimensions,physical protection.distances from I.PC tanks.and paints of transfer.to buildings,roads.railroads.property lines,overhead electrical lines,vaporisers,other flammable liquid storage tanks,and dispenser(gas.diesel etc.).and containment dikes,is to be completed and attached to this application!(Note:the point of transfer is the location%%here connections and disconnections are made or where LP-Gas is vented to the atmosphere in the course or transfer operations.) Tills Al'I'I It vTION%%'tl.l ur:I)ENII I)IF APPLICANT FAILS TO INCI.f1F. ItI. IENS1ONS,AND DISTAVC FS ON PLOT PI s]' A written Incident Prevention Review(Fire Safety Analysis)is required for all installations with aggregate water capacity greater than 4000 gallons.The Incident Prevention Review must be maintained at the LPG facility where it shall be available for inspection by the division upon request. Signature of applicant: Date: CONDITION OF APPROVAL: APPLICATION APPROVED: "Approved on condition that the construction of the tanks,piping,and fittings is in full compliance with the standards of the National Fire Date: Protection Association,NFPA 58 Liquefied Petroleum Gas Code, Colorado statutes and regulations." By: APPLICATION NULL AND VOID AFTER 6 MONTHS IIRO NOT FAX—MAIL ORIGINAL TO: Colorado Division of Oil and Public Safety INSTALLATION APPROVED: PO Box 31 1 Keencsburg,CO 80643 Date: Or c mail to ott.sinunons(astate.co.us By: sc I.1'-f:AS PLOT PLAN See Attached Plot Plan • Rev,1/09 CIVIL RES1URCES,LLC ENGINEERS & PLANNERS • July 28,2010 Weld County Planning and Zoning 1555 North 17th Avenue Greeley, CO 80631 RE: Polar Gas Use By Special Review Permit—1746 Drainage Conformance Certification Letter Originally Submitted April 21,2010 To whom it may concern: Based on our project Pre-Application meeting held on January 29, 2010 and discussions with Clay Kimmi of Weld County Public Works regarding drainage submittal requirements,this letter is to certify that the Polar Gas USR site contained within Lot A RE-828 is in conformance with the Weld County Storm Drainage Criteria and Urban Storm Drainage Criteria Manuals,Volumes 1 -3. Lot A contains approximately 4.52-acres, however for this drainage certification letter we are only required to consider the area contained within the USR boundary which is approximately 2.78 acres. The intention of the Special Use Permit is to allow for propane storage on a portion of the 4.52-acre Parcel. No site improvements are required with the USR permit and the existing access drives will be utilized. The project is bounded on the south by Weld • County Road 22 and by undeveloped land to the north,east and west. The site is located in the South 1/2 of Section 9,Township 2 North, Range 66 West of the 6th Principal Meridian,County of Weld, State of Colorado. According to the Flood Insurance Rate Map Panel No.080266 0866 C,dated Sep.28, 1982,the property lies within Zone C, an area completely outside of the 100-year flood plain. Soil information was derived from the United States Department of Agriculture, Natural Resources Conservation Service's Web Soil Survey 2.0,soil survey of Weld County, Colorado, Southern Part, Version 9, February 11, 2008. The surface soils at the site consist of Otero Sandy Loam and Vona Sandy Loam which are both classified in hydrologic soil group"B". Reference information is included in the attached appendices. As required by the County for this USR permit,the historical flow patterns and run-off amounts have been calculated and are included in the attached Appendices. Additionally,the USR drainage requirements include providing water quality for historical run-off amounts or identifying how the site is currently providing water quality for historical runoff amounts prior to it leaving the site. The existing drainage system for the site includes wide, flat, non-irrigated drought tolerant native grass buffers utilized as sedimentation facilities. These grass buffers are currently in place and are ideal for this development given its flat slopes and Type B soils. In addition,the site is characteristic of a shallow depression area in the south west corner which currently collects storm runoff and serves as a water quality detention area. It is made up of native grasses and trees located between two access drives to the east and west. During infrequent storm events, excess water will overtop the west access drive and continue west toward the Fulton Ditch Extension. The water quality area includes the southerly 40 feet of the Polar Gas USR which is being reserved for future WCR 22 right-of-way. It currently provides a volume of 2,050 C.F.The reserved future right-of-way will continue to be utilized for water quality until future build out of WCR 22. The ultimate size of the water quality area once future build out of WCR 22 is completed has also been analyzed to determine if future volume requirements would be met, The ultimate water quality area excluding additional future WCR 22 right-of-way would provide approximately 971 C.F.of volume. This exceeds the ultimate required volume of 958 C.F. Calculations for both the • existing and ultimate required and provided volumes are included in the attached appendices. 323 FIFTH STREET • P.O. Box 680 • FREDERICK, CO 80630 • PHONE: 303.033.1416 • FAX: 303.033.285❑ Polar Gas USR—Part of Lot A RE-828 July 2010 • civil wim-otif“ S The existing site has been broken up into two sub-basins and the rational method has been used to analyze the historic runoff. Historic sub-basin H1 includes the northern 1.80-acres of the USR boundary having 18.33% imperviousness. It is made up of the gravel access drive,existing outbuilding,and native grasses. The calculated historic runoff for the minor 2-yr and major 100-yr storm events are 0.45-cfs and 4.43-cfs respectively. Sub-basin H2 includes the southern 0.98-acres and is 9.76%impervious. This sub-basin is made up of the gravel access drive and native grasses. The calculated historic runoff for the minor 2-yr and major 100-yr storm events are 0.14-cfs and 2.43- cfs respectively. Calculations the historical drainage map are included within the attached appendices. The intent of this letter has been to describe and confirm that the historic drainage conditions within the USR boundary provide water quality features as required by the County. The USR Permit will not require any additional site improvements and has no adverse effects on adjacent properties. The historic drainage pattern and water quality features contained within the Polar Gas USR boundary complies with the Weld County Storm Drainage Criteria as documented in this Drainage Conformance Certification Letter, Respectfully Submitted, Civil Resources, LLC • Mickey Leylt arnswool • Project Manager Attachments • -2- • • FOR COMMERCIAL SITES, PLEASE COMPLETE THE FOLLOWING INFORMATION • BUSINESS EMERGENCY INFORMATION: Business Name:POLAR GAS FRONT RANGE,LLC Phone: (303)659-1806 Address: 14095 WELD COUNTY ROAD 22 City, ST,Zip: FORT LUPTON,CO 80601 Business Owner: NATHAN REED Phone: 3 O 3.- 9/S-cc/ Home Address: SS2 S J niNYL()Ai 114 City, ST,Zip:.1)E-N,1 ( Z ,OCR List three persons in the order to be called in the event of an emergency: NAME TITLE ADDRESS PHONE (N) 4, S O is eEt1 JWo S /✓riz/zis Da. 7Fw',,-n (C) 3O3.43-L,/: Business Hours:8:00-5:00 Days:MONDAY-FRIDAY Type of Alarm: F Nonefl Burglary Holdupfl Firefl Silentfl Audible Name and address of Alarm Company: Location of Safe: • « ««« «. ««»«»,««...... ««««.«««..««««..,««««„«»,,,,««,„«,,,,,,, MISCELLANEOUS INFORMATION Number of entry/exit doors in this building:N/A Location(s): THERE IS NO BUILDING ASSOCIATED WITH THIS USR. Is alcohol stored in building? Location(s): Are drugs stored in building? Location(s): Are weapons stored in building? Location(s): The following programs are offered as a public service of the Weld County Sheriffs Office. Please indicate the programs of interest. Physical Security Check Crime Prevention Presentation UTILITY SHUT OFF LOCATIONS: Main Electrical: Gas Shut Off: Exterior Water Shutoff: Interior Water Shutoff: • -12- Identify Results • Page 1 of 2 • WELD COUNTY ASSESSOR PROPERTY PROFILE • Account#: R0095787 Parcel#: 130909000012 Tax Area: 2230 Bordering County: Acres: 4.52 Township Range Section Ouart. Sec. Subdivison Name Block# Lot# 02 - 66 -09 - 0 - - Owners Name &Address: Property Address: WHITE BEAR MANAGEMENT LLC Street: 14095 22 CR P O BOX 1183 City: WELD BRIGHTON, CO 80601 Business/Complex: Sales Summary Sale Date Sale Price Deed Type Reception # 9/25/2000 $210,000 WD 2797714 Legal Description PT SW4 9-2-66 LOT A REC EXEMPT RE-828 (.48R) Land Valuation Summary Unit of Number of Assessed Land Type Abst Code Actual Value Measure Units Value Residential 1112 Site Land Subtotal: $80,000 $6,370 Buildings Valuation Summary Assessed Bldg# Property Type Actual Value Value 1 Residential 4 Out Building Improvements Subtotal: $120,358 $9,580 Total Property Value $200,358 $15,950 Building Details Account#: R0095787 Parcel#: 130909000012 Owners Name &Address: Property Address: WHITE BEAR MANAGEMENT LLC Street: 14095 22 CR P 0 BOX 1183 City: WELD BRIGHTON, CO 80601 Building# Property Type 1 Residential • Individual Built As Detail Built As: Ranch 1 Story Year Built: 1915 http://maps2.merrick.com/Website/Weld/setSql.asp?cmd=QUERY&DET=PP&pin... 4/26/2010 Identify Results Page 2 of 2 Exterior: Frame Siding HVAC: Forced Air Interior Finish: Drywall Built As SQ Ft: 1056 # of Baths: 1 Roof Type: Gable # of Bdrms: 1 Roof Cover: Composition Shingle # of Stories: 1 Rooms: 4 Units: 0 Garage: Attached SQ Ft: 0 Detached SQ Ft: 576 Basement: Total SQ Ft: 864 Finished SQ Ft: 0 Account#: R0095787 Parcel#: 130909000012 Owners Name&Address: Property Address: WHITE BEAR MANAGEMENT LLC Street: 14095 22 CR P O BOX 1183 City: WELD BRIGHTON, CO 80601 Building# Property Type 4 Out Building Individual Built As Detail Built As: Shed - Equipment Year Built: 2001 Exterior: HVAC: Radiant Interior Finish: Built As SQ Ft: 2920 # of Baths: 0 Roof Type: Gable # of Bdrms: 0 Roof Cover: # of Stories: 1 Rooms: 0 Units: 0 Garage: Attached SQ Ft: Detached SQ Ft: Basement: Total SQ Ft: Finished SQ Ft: • http://maps2.merrick.com/Website/Weld/setSql.asp?cmd=QUERY&DET=PP&pin... 4/26/2010 Polar Gas USR Drainage Compliance • REFERENCE INFORMATION • • Civil Resources,LLC July 2010 -+`! ----"'"'7^727,8322888•8z,253.„, - ° • 1 _ 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 m h l7 lAn lrn 5,'77777 8 Hf 88f3O C8010.8 ti;N x o 0 0 0 0 0 0 0 O G G C 0 0 0 0 0 0 0 0 0 G 8 N M A r W^N O�O -O EO N=N m h V q r o ood 6o O o O 0000[]00oo o0t00 U �+ n000000000000000000000 <o E r L C op AAA 1n 0 Z N Nt2V NCrV 8 8 17AA O O O Y 2 000828 2 •Y . ? 0 0 0 O O O O 0 0 0 0 0 0 0 0 0 0 0 0 0 0 m a -9n¢ y 7 f > it ^ N r'N--828 N8M AA;V V 382 n 1-2 +'' � 0 o OG� N 6 o do c;6 o 6 o000 o000 ^0 0 0 hm NNN N[7 MO In NN COO I�f0.W .4' 000000000000000000000 L MM88282(7OO O v 1TN Y8110C°1N.P8A o o O o 0 o 0 0 o O o 0 0 o O o 0 0 0 o O .,co t•••IGN 0NOO 0OON Nn O 1T p 018.r mg o N NNN O CO CI 17 In 0 VV."?<)hh G F., O O O O O O d 0 0 0 0 0 0 0 0 0 0 0 0 0 0 a _ t '-'482242;.-•,24,r,-)77772, .7,o 18.0p0f ,3 �l 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 U i A op {pp g ≥ ,^CE000r NNN N 8f2ntA7 ;V a 10!18 p 8 n"88 y , = 0 0 0 0 0 0 0 0 0 0 O 666666,666'6 o Y 2 Z O� Op C�'i C17n 0p> 6 ~^OOOOM O9N'82822O O v222 n 8 In O O O o 0 0 0 0 0 0 0 0 0 0 0 0 0 G 0 0 0 • r V '' 7 Y 888000 r�c'428,8227r.- m�nm '3T ^' 000000000000000000000 7 V 2 Y Y ssI mC7ay N{C��r r OD 01poN C7Om ng.2222 it ,y'1 1°,n Y1 1°vl 1tf O Yf N h CD(O CD CG (O 00 T C 11 0 00 000[i00 O 000000 000 0 00 Y rn 7. 9 v. o.4 d r4 3 +C & wy c -- 5 7 ai S.i i OCp OO)ONMON1pr 0 I))�p 0)t7 P. 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Q.,. .9.. : i f)Q) _ " ¢ G J C' 000 000 OO 0 0000 0000 0Y41,4Q oX d Y D II _ a R V m U E 0 0 DRAINAGE CRITERIA MANUAL(V. 1) RAINFALL • R )I W 0..A5 R ]0 Y! R 69 YI R 68 W fl fiJ W R 66 W I R 65 N R 64 VI H 6} lV 0.8 0.9 1.0 1.0 0.95 0.75 .85 1.04 1.04 .95 1.01 nncM NT z E - 1! I\_ JI 2 ii ® v 1 O2 i ( _______......_ _-- WELO _ pp BRIGHT\\\O • AOMIS En N Gvi Ir 8 Q SO, DER .EF ERSON J t in ` I on r w a DENVER it''' VI CA .- r _ • ... X 0.97 ADAMS — 'D'EVE' ARAPAHOE IA ,. - 0.99 ♦F.fir X • E RGRE ilk. ,.... ,A _ u__ p/ Al.PPHOE ARAPAOCC `- 0�IGUS NELRERT cn ,- CONIFER, 4 1.0 • ,_ • PAR'ER '4 • g a ut SEOAUA .- 1.05 0.95 X 0.99 0. 5 0.8 1.0 0.95 FRb4HT•WN \1.0W 0.85 0.95 R 71 W 0 70 v, R 69 Y! 0.9 R Eft W R 67 W 0 66 W R 65 0 R 64 0 R 53 0 FIGURE RA-1 Rainfall Depth-Duration-Frequency 2-Year, 1-Hour Rainfall • 06/2001 RA-13 Urban Drainage and Flood Control District RAINFALL DRAINAGE CRITERIA MANUAL(V. 1) • R ]I W R 70 1V R 69 W R 66 W R 67 W R 66 W R 65 W R 64 W R 63 VI 1.3 141.45 1.45 1.4 1.35 1.35 1.4 L0NGM0NT 1( n n II • I 1 F I WOOL 1•�2 J 3 I I 1 tAl 1.2~ 0 Iwelt) - , SRIGHTCt • ADA S o 8 I I 00 LDLR JOE CRSONri / �N A ' rc o / DENVER I51 o . — N • 1.1' 1.37 vI X 1.39 ADAMS iIF D VER ARA%H0E or ~ 1.0 •ERG EEN t� n 1 ' 1,4 ~ / / PANDE ARAPAH0E _J DC OAS ELBERT I 0NIFER vi • j FAR ER ra - rII w � °m • F , SEDALI X 1.39 1.0 r. t'1 1.2 1.3 FRANKT WI 1.4 1.4 R JI W R 70 W fi 69 W R 69 W R 67 W R 66 W R 65 W N 64 W It 63 W FIGURE RA-2 Rainfall Depth-Duration-Frequency: 5-Year, 1-Hour Rainfall I i • RA-14 06/2001 Urban Drainage and Flood Control District DRAINAGE CRI FERIA MANUAL (V. 1) RAINFALL • . R 71 W R 70 W R 69 W 9 68 a R 67 VI R 66 Y/ R 65 W R 64 VI R 6.1 W 1.5 i.ti 1.7 1.75 1.75 . 17 1.65 1.6 1.6 1.65• \I.ONGMONT \ z F z I 7 11 e r rvlo; 1.'ry'�r 9 z '.551 It 1 ml I WEL' _ r F .} _ v, I BRICHiU ADAPT ~ in I/!!!_ ER Er ERSOlI J I---,u1 {I QI ' DENVER I � / ,---- VTJ I7 rn ` AOAMS — II0 'V68 \ ARAPAHOE o a \\\\\\ _ _ L —. 1 EVE•'REEN „ r•i 1.65 N 1 55 P / A L us 0 SLAG ELBERT CONIFER ' v( 3 PAR ER n i ti �� • S 7 ow .6 ! 6EOALIA `\ I{ \ 1.65 1.7 1.65 1.7 R I1 IN R 70 VI R 69 VI R 66 W R 67 LV R 66 a R 65 W R 64 W R 63 61 FIGURE RA-3 Rainfall Depth-Duration-Frequency: 10-Year, 1-Hour Rainfall r • 06/2001 RA-15 Urban Drainage and`lood Control District RAINFALL DRAINAGE CRITERIA MANUAL(V. 1) • R 71 0 R 70W R 69 V/ R 66 'W R67 W 1166v! R 650 R640 R 63v! 1 2.4 2.5 2.65 2.7 ..2.7 2.61 2.65 2.7 2.6 LONGMONT I F • \ C( wl'woi OF , . 44t. ,• f m 1 / wan 2.3 1 A 0016Nro • .DANS ,_ -_II oER a 3/ p ER ON V r -I 1 , I I _ ON / J N N R / ° 22 / L. • �. ADAMS \\CAPAHOE N • 2.15 iiik \ 2.1 \ 1 �4 f - 2.7 cve•: EEN ` \ / ,._ 7.65 F LT: Al A1108 \ .—A APAH0E F 2.05 O GIAS ELBERT 'C<1iFER ' �� N • I 0 PAR ER m L, b ali S w V. \ m r. 2.DJ S'cDAI.IA '�� ------2.6 r FRANKI WN L 5 2.1 2.15 2.2 2.3 24 \ 5 0 71 'W 0 70 0 R 69 V! R 68 W R 67 0 0 66 0 R 65 0 R 61 v! R 63 V/ FIGURE RA-6 Rainfall Depth-Duration-Frequency: 100-Year, 1-Hour Rainfall I I I • I RA-16 06/2001 Urban Drainage and Flood Control District JOB NO. 207-002 DATE 04/21/10 BY MLF PROJECT POLAR GAS USA • Civil REVISION DATE Krs �ur.�CLS One-hr Precipitation/Watershed Imperviousness I. One-hr Precipitation Values for Site Return period in years 2 5 10 100 Depth in inches 0.95 1.32 1.58 2,60 II. Recommended Runoff Coefficients for Weld County Land Use or Surface Characteristics Percent Impervious% Business: Commercial areas 95 Neighborhood areas 85 Residential: Single-family Multiunit(detached) 60 Multiunit(attached) 75 Half-acre lot or larger Apartments 80 Industrial: . Light areas 80 Heavy areas 90 Parks,cemeteries: 5 Playgrounds: 10 Schools: 50 Railroad yard areas: 15 Undeveloped areas: Historical Flow Analysis 2 Greenbelts,agricultural Off-site flow analysis 45 (when land use not defined) Streets: Paved 100 Gravel(packed) 40 Driveways and sidewalks: 90 Roofs: 90 Lawns,sandy soil 0 Lawns,clayey soil 0 *Refer to Figures RO-3 through RO-5 in Runoff Chapter of USDCM. • • y N C FO T 0 0 O#'to C.4 CO .- <O 2 Co: n <A a' N U- j C M T r et y O N -4' O m CO to O 6 S. T n v O CV O CC O-8 S O N N j N co 0 0 H 4 2 J N p op 0 � _ O g%),0) N <00 in N N CL CCCC 0 Ili NC CO CV •- O N L- O Q CC O N 0 H Z a w O Z 0 N I-- y6y C T _I� 53 N to<), O1CC al W Vuz-0000 •- - 2 0- 0 J ILI> c ^ Ill c D wtLr'n, `-noo (.1" in ti CO CO N W t to V M CJ N. CD N N N > •� CC C_ C_ C_ C_ a • 0 0) CU tCO o CO C ^ O V t _ W CO V N CO O a N C TM CO 0 .,-y N 0 O O it F N (1) C : p WC O y 0. CD CDD. CJ Z J -2 N CO N'<V 1- 6 a ` .= N <D co N O as N N N V LO to d 'v T N V LO n 0) 01 0 0 0 0 0 O Q vi ft W V C R U N V t[ a CO j LL O O O O rCC JCip;' ----: <OD L... t a N N L:J � d d N � N N O Z � o O N _ OC cC cc 'cf., ;� a�i a�i �.oT CD = o d T T O O O 0 <n N t[) — '- Li JOB NO. 207-002 DATE 04/21/10 BY MLFC---m../- PROJECT POLAR GAS USR REVISION DATE SCIVIL RES-9URCES INTENSITY INTENSITIES VELOCITY COEFFICIENTS TIME(mina LyL. if, 10 yr. 100 yr. 5 3.31 4.59 5.50 9.05 1 2.5 10 2.57 3.56 4.266 7.02 2 5 15 2.17 3.01 3.60 5.93 3 7 20 1.94 2.70 3.23 5.32 4 10 30 1.50 2.09 2.50 4.11 5 15 40 1.32 1.83 2.19 3.61 6 20 50 1.13 1.58 1.89 3.10 60 0.95 1.32 1.58 2.60 1 =Heavy Meadow 2=Tillage/Field 3=Short pasture&lawns 4=Nearly bare ground 5=Grassed waterway 6=Paved areas and shallow paved swales III I Polar Gas USR Drainage Compliance • DESIGN CALCULATIONS • • Civil Resources,LLC July 2010 JOB NO. 207-002 DATE 04/21/10 BY MLF C„Cr ,j---1-- PROJECT POLAR GAS USR REVISION DATE 07/21/10 • civic RLsiDukcLS Runoff Coefficients Weighted Coefficients (Type "B"Soil) BASIN LAND USE AREA(ac.) C2 C5 CID C,D0 l(%) Gravel Road 0.560 0.230 0.300 0.360 0.500 40 H1 Concrete 0.020 0.890 0.900 0.920 0.960 100 Natural Grasses 1.150 0.028 0.124 0.214 0.410 2 roofs 0.070 0.710 0.730 0.750 0.810 90 Total Area 1.800 Composite 0.13 0.21 0.29 0.46 18.33 BASIN LAND USE AREA(ac.) 02 C5 C,0 C,„ l(%) Gravel 0.200 0.230 0.300 0.360 0.500 40 H2 Concrete 0.000 0.890 0.900 0.920 0.960 100 Natural Grasses 0.780 0.028 0.124 0.214 0.410 2 Roofs 0.000 0.710 0.730 0.750 0.810 90 • Total Area 0.980 Composite 0.07 0.16 0.24 0.43 9.76 BASIN LAND USE AREA(ac.) C2 C5 C,0 C100 I(%) Gravel 0.760 0.230 0.300 0.360 0.500 40 USR BOUNDRY Concrete 0.020 0.890 0.900 0.920 0.960 100 Natural Grasses 1.930 0.028 0.124 0.214 0.410 2 Roots 0.070 0.710 0.730 0.750 0.810 90 Total Area 2.780 Composite 0.11 0.19 0.27 0.45 15.31 • JOB NO. 207-002 DATE 04/21/10 BY MLF C-....------ PROJECT POLAR GAS USR REVISION DATE 07/21/10 • ( ivii R1S' URc.i_ Runoff Coefficients Weighted Coefficients (Type"B"Soil) BASIN LAND USE AREA(ac.) C2 C5 C10 C1 I(%) Gravel 0.170 0.230 0.300 0.360 0.500 40 `H2 Ultimate Concrete 0.000 0.890 0.900 0.920 0.960 100 Natural Grasses 0.400 0.028 0.124 0.214 0.410 2 Roofs 0.000 0.710 0.730 0.750 0.810 90 Total Area 0.570 Composite 0.09 0.18 0.26 0.44 13.33 *Excludes WCR 22 future right-of-way(Assumes right-of-way expansion will include a roadside ditch to convey runoff westerly within ROW). BASIN LAND USE AREA(ac.) C2 C5 C10 C1 l(%) Gravel 0.730 0.230 0.300 0.360 0.500 40 *USR BOUNDRY Concrete 0.020 0.890 0.900 0.920 0.960 100 • Ultimate Natural Grasses 1.550 0.028 0.124 0.214 0.410 2 Roofs 0.070 0.710 0.730 0.750 0.810 90 Total Area 2.370 Composite 0.12 0.20 0.28 0.45 17.13 'Excludes WCR 22 future right-of-way(Assumes right-of-way expansion will include a roadside ditch to convey runoff westerly within ROW). 0 JOB NO, 207-002 DATE 04/21/10 BY MLF � PROJECT POLAR GAS USR • �- REVISION DATE 7/21/10 CIVIl RFS'iUR('.FS HISTORIC RUNOFF HISTORIC RUNOFF LENGTH AVG. %IMP. BASIN AREAS C2 C5 C10 C100 (B) H1 1.80 ACRES 0.13 0.21 0.29 0.46 465 3.00% 18.33% H2 0.98 ACRES 0.07 0.16 0.24 0.43 351 3.00% 9.76% 'H2 Ultimate 0.57 ACRES 0.09 0.18 0.26 0.44 330 3.00% 13.33% *Excludes WCR 22 future right-of-way(Assumes right-of-way expansion will include a roadside ditch to convey runoff westerly within ROW). HISTORIC TIME OF CONCENTRATION INITIALJOVERLAND TRAVEL TIME TIME(ti) (ft) tc=ti+tt * BASIN C5 LENGTH SLOPE t1 LENGTH SLOPE VEL. t, FINAL Ft % Min Ft % FPS Min Min H1 0.21 132 3.0% 13.24 333 1.5% 0.9 6.47 19.72 2 H2 0.16 101 3.5% 11.64 250 i 1.8% 0.9 4.50 16,14 2 'H2 uilimate 0.18 101 3.5% 11.43 229 1.8% 0.9 4.12 15.55 2 • USE MINIMUM TIME OF CONCENTRATION 'Toe of Land Surface for Overland Travel Time t,=1.67(1.1-CC)D1r2 t,= L 1=Heavy Meadow s1'3 60V 2=Tillage/Field 3=Short pasture&lawns C,=Frequency Adjustment Factor 4=Nearly bare ground C,2 and 10 year=1.0 5=Grassed waterway 6=Paved areas and shallow paved swales TOTAL HISTORIC RUNOFF BASIN TO C2 C100 12 1100 AREA Q2 Q100 (min) (in/hr) (in/hr) (ac.) (cfs) (cfs) H1 19.72 0.13 0.46 1.95 5.35 1.80 0.45 4.43 H2 16.14 0.07 0.43 2.13 5.79 0.98 0.14 _ 2.43 'H2 ultimate 15.55 0.09 0.44 2.14 5.86 0.57 0.11 1.46 RATIONAL METHOD Q=CIA a-FLOW IN CUBIC FEET PER SECOND C-RUNOFF FACTOR A-AREA • I-AVERAGE RAINFALL INTENSITY JOB NO. 207-002 DATE 04/21/10 BY MLF PROJECT POLAR GAS USR REVISION DATE 7/21/10 • civil RI_S7IUICI-5 WQCV USR BOUNDARY Basin Area: 121,096.80 S.F 2.780 Acres %Impervious 15.31 % Water Quality Control Volume: 24-hr Drain Time: WQCV=a"(0.91 i3-1.19i2+0.781) a=adjustment for BMPs drain time (6-hr=0.7, 12-hr=0.8,24-hr=0.9,40-hr=1.0) From fig. EDB-2: Design Volume(WQCV)=(WQCVi/12)"Area*1.2 WQCVi= 0.085 inches (from UDFCD vol 3 update) 'Includes 1.2 Factor of Safety for sediment accumulation Design Volume(WQCV)= 1,033.06 ft.^3 0.024 ac.ft, H] Basin Area: 78,408.00 S.F 1.800 Acres %Impervious 18.33 Water Quality Control Volume: • 24-hr Drain Time: WQCV=a"(0.91 i3-1.19i2+0.78i) a=adjustment for BMPs drain time (6-hr=0.7, 12-hr=0.8,24-hr=0.9,40-hr=1.0) From fig.EDB-2: Design Volume(WQCV)_(WQCVi/12)"Area" 1.2 WQCVi= 0.098 inches (from UDFCD vol 3 update) Includes 1.2 Factor of Safety for sediment accumulation Design Volume(WQCV)= 766 ft.^3 0.018 ac.ft. H2 Basin Area: 42,688.80 S.F 0.980 Acres Impervious 9.76 % Water Quality Control Volume: 24-hr Drain Time: WQCV=a"(0.91 i3-1.19i2+0.78i) a=adjustment for BMPs drain time (6-hr=0.7, 12-hr=0.8,24-hr=0.9,40-hr= 1.0) From fig.EDB-2: Design Volume(WQCV)=(WQCVi/12)*Area 1.2 WQCVi= 0.059 inches (from UDFCD vol 3 update) •Includes 1.2 Factor of Safety for sediment accumulation Design Volume(WQCV)= 252 ft^3 • 0.006 ac.ft. JOB NO. 207-002 DATE 04/21/10 BY MLF PROJECT POLAR GAS USR REVISION DATE 7/21/10 ( IVII RIS ' UWCIS ULTIMATE WQCV(OUTSIDE WCR 22 FUTURE ROW) USR BOUNDARY ULTIMATE (Excludes WCR 22 future right-of-way) Basin Area: 103,038.43 S.F 2.365 Acres %Impervious 17.13 % Water Quality Control Volume: 24-hr Drain Time: WQCV=a'(0.91 i3-1.19i2+0.78i) a=adjustment for BMPs drain time (6-hr=0.7,12-hr=0.8,24-hr=0.9,40-hr= 1.0) From fig. EDB-2: Design Volume(WQCV)=(WQCVi/12)'Area•1.2 WQCVI= 0.093 inches (from UDFCD vol 3 update) Includes 1.2 Factor of Safety for sediment accumulation Design Volume(WQCV)= 957.70 ft.^3 0.022 ac.ft. H1 Basin Area: 78,408.00 S.F 1.800 Acres %Impervious 18.33 % Water Quality Control Volume: 24-hr Drain Time: WQCV=a'(0.91 i3-1,19i2+0.781) a=adjustment for BMPs drain time (6-hr=0.7, 12-hr=0.8,24-hr=0.9,40-hr=1.0) From fig. EDB-2: Design Volume(WQCV)_(WQCVV12)"Area*1.2 WQCVi= 0.098 inches (from UDFCD vol 3 update) 'Includes 1.2 Factor of Safety for sediment accumulation Design Volume(WQCV)= 766 ft^3 0.018 ac.ft. H2 Ultimate (Excludes WCR 22 future right-of-way) Basin Area: 24,720.73 S.F 0.568 Acres %Impervious 9.76 % Water Quality Control Volume: 24-hr Drain Time: WQCV=a*(0.91 i3-1.19i2+0.78i) a=adjustment for BMPs drain time (6-hr=0.7, 12-hr=0.8,24-hr=0.9,40-hr=1.0) From fig. EDB-2: Design Volume(WQCV) =(WQCVV12)"Area* 1.2 WQCVi= 0.059 inches (from UDFCD vol 3 update) Includes 1.2 Factor of Safety for sediment accumulation Design Volume(WQCV)= 146 ft^3 • 0.003 ac.ft. JOB NO. 207-002 DATE 04/21/10 BY MLF PROJECT POLAR GAS USR REVISION DATE 7'/21/10 • CIVII RI 'I NR(;I S DETENTION VOLUME PROVIDED EXISTING WATER QUALITY FEATURE Water Surface Contour Incremental Cumulative Elevation Area Storage Storage WQCV W.S, ELEVATION (feet) (sf) (cubic feet) (cubic feet) ELEV. 10 YR 100 YR 98,82 0 129 99.0 1431 23.182 2560 99.39 100.00 3689 2583.43 WQ VoI= 1,033 WQ W.S.- 99.39 ULTIMATE WATER QUALITY FEATURE OUTSIDE 40'RESERVED WCR 22 ROW • Water Surface Contour Incremental Cumulative Elevation Area Storage Storage WQCV W.S.ELEVATION (feet) (sf) (cubic feet) (cubic feet) ELEV. 10 YR 100 YR 98.82 0 14 99.0 152 2.465 968 99.99 100.00 1784 970.51 WQ Vol= 958 WO W.S.= 99.99 • ':IVIL RES•XU RCES, LLC ENGINEERS & PLANNERS MEMORANDUM • To: Kim Ogle, Department of Planning Services Don Carroll, Engineering Administrator; Janet Carter, Traffic Engineer From: Danna Ortiz, Planner Date: May 19, 2010 Subject: Response to County Staff Comments from the 7-Day Completeness Review Following is our response to your letter dated May 7, 2010 regarding Staffs Completeness Review. Lauren Light with the Department of Public Health and Environment reviewed the application materials and states in her referral dated April 29, 2010, "They will need to provide sanitary facilities for drivers coming to the site. They have indicated they will not provide any restrooms. We can add as a condition of approval that they will need to provide a permanent facility. We strongly believe that this is an unreasonable request; we would like to discuss this condition with the Weld County Commissioners. We are not aware of any other sites with oil and gas storage tanks that have a restroom. Planning Services reviewed the application file and requests documentation on the origin of potable and non-potable water;potable water for drinking, hand-washing and lavatory, and non-potable water for dust suppression as applicable. Also,please provide additional narrative on waste handling, e.g., dumpster • with name and telephone number of waste hauler, methods of handling on-site dust, and other nuisance condition. • No potable or non-potable water is required for drinking, hand-washing, lavatory or dust suppression. The people that access the property are truck drivers—they can carry water with them in their truck if they need a drink of water. The Polar Gas facility where employees will orginate from is about 11 miles from this site and contains both potable water and a lavatory. The purpose of this USR is to place propane tanks on the property, which will require employees to be on-site for up to 45 minutes. It does not make sense, it is not economically feasible, nor is it fair or to require Polar Gas to construct a building, septic system and restroom for this use. This is not required for all of the other oil and gas storage facilities in the area. • There will be no need for dust suppression as the access road is made of recycled asphalt and the rest of the site is vegetated with native grass. • There will not be any waste generated on site. Again, employees will only be on the property long enough to fill their trucks with propane. Anything that they bring on the site with them, they will be required to take off the site with them. Please provide additional narrative and describe the method of filling the on-site stationary propane tanks, and the off-loading of propane into tanker trucks for delivery. From the drawings, it is unclear how these two actions are achieved given the location of the road surface, vegetation and on-site fence. The vegetation, trees and fence will all remain; the hose from the truck on the access drive can reach the tank without any problem because the hoses are flexible. Each tank will have its own loading/unloading station. A transport truck will pull up to the tank(while remaining on • the access drive) and attach its liquid and vapor hoses to the tank. The truck will then unload its propane into the tank. A smaller truck or bobtail will come to load propane out of the tanks. They will attach their liquid and vapor hoses to the tank(while the truck remains on the access drive) and the propane will be pumped out of the tank into the truck. 323 FIFTH STREET• FREDERICK, COLORADO 80530• PHONE: 303.833.1416• FAX: 303.833.2850 CIVIL RESmURCES • Please address the requirements of Section 23-2-260.8.13 under the heading of Application Requirements. (Applicant shall submit a proposed landscape plan.) The landscape plan is included on the site plan. Please address the requirements of Section 23-2-260.C.16(describe fire protection measures). The Platteville-Gilcrest Fire Protection District(PGFPD) serves this property. Polar Gas has been coordinating with PGFPD and will ensure that the tanks are installed in accordance with National Fire Protection Association standards for propane storage. Safety Summary All propane installations are governed by the Liquefied Petroleum Gas Code also known as NFPA 58, as adopted by the State of Colorado. This proposed distribution facility and all of Polar Gas' current distribution facilities meet 2011 standards. Tanks • The propane tanks intended for use at the proposed facility have already been inspected approved for use by the State of Colorado. • The tanks will be set on rebar re-enforced concrete saddles that will be built on site. The plans for the saddles will be designed and engineered by a structural engineer. The saddles will be built according to those plans. Safety Features • Pressure Relief Valves-- Both tanks will be equipped with three new, two inch pressure relief valves. • These will protect the tanks from building too much pressure in an emergency situation. • Internal Valves-- Every opening on the tank will be equipped with a pneumatic internal valve that will ensure the flow of propane will be shutdown at the tank if there is a break in piping. All internal valves will be equipped with and automatic shutdown system that will incorporate thermal (fire) protection. • Emergency Shutoff Valves--All transfer operations will have emergency shutoff valves. • Piping --Only Schedule 80(extra heavy) pipe will be used. • Crash Protection--The tanks and points of transfer will be surrounded with crash protection. Crash protection will include four inch pipe bollards fill with concrete. The bollards will be buried three feet deep with four feet exposed. Under the heading of Plot Plan, please address Section 23-2-260.D.5.b to include the entire property as the size of the parcel is less than 35 acres. We did not find any reference in the Use by Special Review regulations that require the entire property to be included. Section 23-2-200 G, states"any decrease in land mass occupied by a Use by Special Review shall qualify the landowner to be able to request a partial vacation of the Use by Special Review from the Board of County Commissioner, permitting the following: • The property under consideration for a partial vacation of the USR has received permission to release the property from the permit from applicable County and State agencies. • This process does not create separate parcels. • • To obtain partial vacation of the USR permit, the applicant shall submit a letter to Planning requesting the partial vacation and a revised map illustrating the vacated portion of the property and the existing permit. Page 2 CIVIL RFS 'tiRCES • • Upon determination of compliance with the original USR permit and all applicable applications, this Chapter and Chapter 29 of this Code by the Department of Planning Services, the applicant shall be granted a partial vacation of the USR permit. • Once approved,the applicant must submit a plat...illustrating the vacated portions of the property/operation." Nothing in this section states that there is a minimum parcel size. We would like to discuss this requirement with the Board of County Commissioners. Also, please address Section 23-2-260.D.5.c.10 concerning the traffic circulation specific the drive to the North property line, adjacent to the westerly property line. This access road appears to provide oil and gas access to lands north of this property, please confirm. The access road is not intended to provide oil and access to the land north of this property. The oil and gas companies do not have a documented right to go through this property to access their facilities and will not have a key to the gate. Site Plan In the legend, clarify proposed tanks vs.proposed future tanks verbage. In the immediate future, Polar Gas only plans to install one tank on the property. However, there is sufficient room on the property for eleven tanks and Polar Gas would like to have the ability to install these additional tanks without having to go through the Use by Special Review Process again. • The existing shop is within the USR boundaries. You are indicating that it is not associated with the USR. The only things that are associated with this USR are the proposed tanks, access road, fences and associated landscaping. We included the existing shop within the USR because we did not think the County would allow us to have a donut-shaped USR boundary. Shall we exclude it? How do you serve the future and proposed tanks by filling the tanks or picking up fuel to be delivered? The proposed tanks will typically be filled by EnCana Midstream, Inc., which is located at 16157 Weld County Road 22, approximately 2 miles east of the site. All tanks will be connected so that they can be filled and emptied from one location. Is there an additional road section that needs to be shown on the plat drawing? No. Clarification on the dashed line, which is dimensioned at 20 feet and is located the fourth future propane tank location. Is this dashed line associated with a septic field or something that should be identified on the plat drawing? The dashed line should not have been on the map, it has been removed. You are indicating on the plat drawing USR-1638 boundary referring to that file Bartez LLC is located in Section 17, T2N, R66W, which is located south of WCR 22 and west. This item needs to be removed from the plat. This item has been removed. • Page 3 CIVIL RES' URCES • Private road drive-oil/gas road: The west side of the proposed USR: You are indicating an existing private drive 12 feet in width and a gravel surface to access additional oil and gas wells north of the proposed USR on adjacent properties. Is there any type of documentation for easement that is associated with this access road? If so, this should be placed on the plat drawing and identified as such. No, there is no documentation that the oil and gas companies have a right to use this access road, We did not intend to show access to oil and gas facilities on this site plan, nor can we find any reference to oil and gas on it. Questionnaire Item number 5a on the Questionnaire, the number of people that use the site. You refer to 5f as three delivery vehicles per day. Is the number 3 or are there any additional employees that utilize the existing shop or the USR area at the same time? Number 56, Number of employees proposed to be employed at the site. Same question: Are there any additional employees utilizing the existing shop or the USR are at the same time? The shop is not associated with this USR and Polar Gas employees will not be allowed to enter the shop—it is associated with the private residence. Typically, there will only be one employee on the site at a time and they should not be on the site any more than 45 minutes. Typically, during peak season (November through February), each storage tank would be filled every other day. During this timeframe, it is anticipated that there will be three delivery vehicles obtaining propane per tank per day. Traffic Study Based on the information provided by the applicant a Traffic Study is not required. However, if traffic volumes are increased a Traffic Study may be required. • Traffic generate from the proposed storage tanks will be nominal. Preliminary Drainage The applicant has provided water quality calculations for a water quality feature. The calculations appear to be adequate for review. A detailed technical review of the calculations was not performed at this time. A detailed technical review will be done once the application is deemed complete. So noted. Geotechnical Soil Report A geotechnical report is not required at this time. So noted. Special Flood Hazard Area This area is not in a Special Flood Hazard Area(SFHA)as determined by the Federal Emergency Management Agency(FEMA). So noted. • Page 4 CIVIL RESURCES, ENCINEERS & PLANNERS • April21, 2010 Weld County Planning and Zoning 1555 North 17th Avenue Greeley,CO 80631 RE: Polar Gas Use By Special Review Permit-Lot A RE-828 Drainage Conformance Certification Letter To whom it may concern: Based on our project Pre-Application meeting held on January 29, 2010 and discussions with Clay Kimmi of Weld County Public Works regarding drainage submittal requirements,this letter is to certify that the Polar Gas USR site contained within Lot A RE-828 is in conformance with the Weld County Storm Drainage Criteria and Urban Storm Drainage Criteria Manuals,Volumes 1 -3. Lot A contains approximately 4.52-acres, however for this drainage certification letter we are only required to consider the area contained within the USR boundary,which is approximately 2.78 acres.The intention of the Special Use Permit is to allow for propane storage on a portion of the 4.52-acre Parcel. No site improvements are required with the USR permit and the existing access drives will be utilized. The project is bounded on the south by Weld County Road 22,and by undeveloped land to the north,east and west. The site is located in the S 1/2 of • Section 9,Township 2 North, Range 66 West of the 6th Principal Meridian,County of Weld,State of Colorado. According to the Flood Insurance Rate Map Panel No.080266 0866 C, dated Sep.28, 1982,the property is located outside the 100-year floodplain. According to this map(Appendix A),the project site lies within Zone C,which is an area completely out of the 100-year flood plain. Soil information was derived from the United States Department of Agriculture, Natural Resources Conservation Service's Web Soil Survey 2.0,soil survey of Weld County, Colorado, Southern Part, Version 9, February 11,2008(Appendix A, Ref.4). The surface soils at the site consist of Otero Sandy Loam and Vona Sandy Loam which are both classified in hydrologic soil group"B". Because of the unique features of this development and per conversations with the County, existing conditions for the USR site has been analyzed. The existing site has been broken up into two sub-basins and the rational method has been used to analyze the historic runoff. The existing drainage system for both sub-basins includes wide,flat, non-irrigated drought tolerant native grass buffers utilized as sedimentation facilities. These grass buffers are currently in place and are ideal for this development given its flat slopes and Type B soils. In addition,sub-basin H2 has a shallow depression area at the south west corner of the site which currently collects storm runoff and serves as a water quality detention area. This area is made up of native grasses and trees located between two access drives to the east and west. During infrequent storm events,excess water will overtop the west access drive and continue west toward the Fulton Ditch Extension. Historic sub-basin H1 includes the northern 1.80-acres of the USR boundary having 18.33%imperviousness. It is made up of the gravel access drive, existing outbuilding,and native grasses. The calculated historic runoff for the minor 2-yr and major 100-yr storm events are 0.48-cfs and 4.44-cfs respectively. Calculations are included within the attached appendices. Sub-basin H2 includes the southem 0.98-acres and is 9.76%impervious. This sub-basin is made up of the gravel access drive and native grasses. The calculated historic runoff for the minor 2-yr and major • 100-yr storm events are 0.16-cfs and 2.41-cfs respectively. 323 FIFTH STREET • RO. Box 680 • FREOERICK, CO 80530 • PHONE (303) 833-1416 • FAX (303) 633-28SC Polar Gas USR—Part of Lot A RE-828 April 2010 CIVIL RESURCES,LLC • The intent of this letter has been to describe and confirm the historic drainage conditions within the USR boundary provide water quality features as required by the County. The USR Permit will not require any additional site improvements and has no adverse effects on adjacent properties. The historic drainage pattern and water quality features contained within the Polar Gas USR boundary complies with the Weld County Storm Drainage Criteria as documented in this Drainage Conformance Certification Letter. Respectfully Submitted, Civil Resources, LLC �J %LI Mickey Ley arnswo Manager Attachments • • -2- Polar Gas USR Drainage Compliance • REFERENCE INFORMATION • • Civil Resources, LLC April 2010 RAINFALL DRAINAGE CRITERIA MANUAL (V. 1) • R 7 I W R 70 W R 69 W R 66 W R 67 W R 66 W R 65 W R 54 W R 63 W 1.3 1 41.45 1.45 1.4 1.35 1.35 1.4 I 1 / —1 1 w LONGMONT l • z 1,52. I- I NrWoi I ' vN 1- • Z ILl 3 r1 01 ' z a;v m - ~ 1.2 WED m I0 i 46 o .. BRIGHT 1v AD S ~ i o \ I 80 ER o �I JE ERSON m E1 DENVER e. ' — nT • 1.1 1.37 - X 1 / L39 ADAMS ID'�vER ARAPAHOE En r- 1 �4 1'0 ^/ERG EEN in 1 in a - PAHOE ARAPAHOE D• GIAS ELBERT ONIFER ;•)�'� '^ •I V PAR EX js otr F- o 03 O w an SEOALIA 1.1 X 1.39 4 1.0 1,2 1.3 I FRANKTeWI 1.4 1.4 R 71 W R 70 W R 69 W R 60 W I R 67 W R 66 W R 65 W R 64 W R 63 W FIGURE RA-2 Rainfall Depth-Duration-Frequency: 5-Year, 1-Hour Rainfall 0 I RA-14 06/2001 Urban Drainage and Flood Control District DRAINAGE CRITERIA MANUAL (V. 1) RAINFALL • R 71 W' R 70 W R 69 W R 68 W R 67 W R 66 W R 65 W R 64 W R 6! W 1.6 1.7 1.75 1.75 1 7 1 5 1.65 1.6 1.6 1.65 i LONGNONT \ z I z„ . F I �IWOT_ 55 „sr . WEL1 I 1.4 eHIGHT. AOAE S rad l I ~ II , DER irON ytrirari r up up ca DENVER I r • rAir( ADAMS ~\ ARAPAHOE La un 1 EVE REEK 111,1 ‘, 1.65 Ln 4 1 55 ac, / I ARAPAHOE pi GL>5 ELDERT CONIFER /�/�� • PM EF o • �m r 0'w N. .6 i //SE—DA�L�IA 1.3 1.4 1.5 ( / ..,,N 1.65 1.7 1.65 1.7 R 71 W I R 70 W R 69 W R 68 W R 67 W R 66 W R 65 W R 64 W R 63 W FIGURE RA-3 Rainfall Depth-Duration-Frequency: 10-Year, 1-Hour Rainfall • RA-15 06/2001 Urban Drainage and Flood Control District RAINFALL DRAINAGE CRITERIA MANUAL(V. 1) • R 71 W R 70 W R 69 W R 68 'N R 67 W R 66 W R 65 W R 64 W R 63 W 1_ 2.4 2.5 2.65 2.7 ,2.7 2.6j 2.65 2.7 • 26I LONGA19Ni • I \ \ 1- NI'NOT ti i ELD r ij1 311 2N3 S _ c DER a ER ON < tn N O / N 1 W CC N Rk. / . en • • 22 j% S / ~ .. ADAMS ! 1.5%W. ,E � ` 2.7 tn 2.65 In id r ��,► 1 ftitz ., A AHOE ARAPAHOE 2.05 , 01GUS ELBERT N `�ONiFER /1�� • I- • N � �. .--......tp. .,Eft r $w SEDALIA • 2.05 2.6 F Alga WN — 2.5 2.1 2.15 2.2 2.3 r 4 2.'5 R 71 'N R 70 W R 69 W R 68 W R 67 W R 66 W R 65 111 R 64 w I R 63 W FIGURE RA-6 Rainfall Depth-Duration-Frequency: 100-Year, 1-Hour Rainfall r • RA 18 06/2001 Urban Drainage and Flood Control District DRAINAGE CRITERIA MANUAL (V. 1) RAINFALL • R 71 W o_25 R 70 W R 69 W R 65 W R 67 W R 66 W i R 65 W R 69 W ( R 63 W 0.8 0.9 1.0 1.0 0.95 ,.95 1.0; 0.75 .85 1.04 1.04 I LONGM Mr '0 0.95 • 4 z EB I NI/01 (_ OAJ 93 I WELD F 8RIGNTO • ADAMS w m 1^ o a �.1 8 a 1 - 001 DER I , EF SON I N 4 o 0 j DENVER B. wa i wa ,r • i X097 ADAMS D ' ARAPAHOE o < 111r 99 X jRE N L N.,,,d ~ >p ARAPAHOE 0• GLti BERT CONIFER 1/[e 1'0 ✓i • IpI . RAR:ER e as W{ • r ,- N r N 0 _ 0.95 X 0.79 1.0 0.95 0.7 FRANKT•WN 0.8 • 1.0 0.85 0.95 R71 W R70W R69 W 09 R60W t R 67W R 66W R65W R64 W R63W FIGURE RA-1 Rainfall Depth-Duration-Frequency: 2-Year, 1-Hour Rainfall • RA-13 06/2001 Urban Drainage and Flood Control District Polar Gas USR Drainage Compliance • DESIGN CALCULATIONS • • April 2010 Civil Resources,LLC • _ \\\ ) k V4k$\k - 0Ftffw § < � . < . . . \ \ \*\-. kOl co 0 Ili ig) `ZS \ 2 i_, \«s» \ k \ C \\ \ ■ Ok L. qBC }k/\ \ d - ■ / /\ \ ) , Ai : CO CO CO VI a ' CD 0 0 CD J ' }/ • \ \ \ � © > a # \ ftc 11- $ ~ � / ~ \\ \ '6 » , CA \ \(ç1\ U ) d ! § , ( ® \ o J LJJ Or \ 2 .f- S • U > 0.1 LO r r _ JOB NO. 207-002 DATE 04/21/10 BY MLF CO PROJECT POLAR GAS USR REVISION DATE • CIVIL RESOURCES INTENSITIES VELOCITY COEFFICIENTS TIME(min.l Zs 'km 100 vr. 5 3.31 5.50 9.05 1 2.5 10 2.57 4.266 7.02 2 5 15 2.17 3.60 5.93 3 7 20 1.94 3.23 5.32 4 10 30 1.50 2.50 4.11 5 15 40 1.32 2.19 3.61 6 20 50 1.13 1.89 3.10 60 0.95 1.58 2.60 1 =Heavy Meadow 2=Tillage/Field 3=Short pasture&lawns 4=Nearly bare ground 5=Grassed waterway 6=Paved areas and shallow paved swales • 0 ` b 2.00x-MONO inoter-nb0a ¢ • - 066066666666666600o60 e b 000000000000A60000000 .6 O O O O O O O O 0 0 0 0 O O O O O O 6 N m b n m--N Y b b.-e b N b N m b e . e . ggqmmmm ed..dmmmmbrnbm � ° n 000000000000000000000 o a 1N UY e O C ciao e n s` 4' 00 b e> , , -. 000000000000000000000 Rff� ez 4e ,_ NNN0600NOOMWM`0 • 000000000000000000000 y O O N 0 m o m b m m n,-b n m-m m ≥N 0 O N N N N m m e Y b b b r n 0 ,4666666666666666666666 . 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Recommended Runoff Coefficients for Weld County Land Use or Surface Characteristics Percent Impervious Tu Business: Commerdal areas 95 Neighborhood areas 85 Residential: Single-family Multiunit(detached) 60 Multiunit(attached) 75 Half-acre lot or larger Apartments 80 • Industrial: Light areas 80 Heavy areas 90 Parks,cemeteries: 5 Playgrounds: 10 Schools: 50 Railroad yard areas: 15 Undeveloped areas: Historical Flow Analysis 2 Greenbelts,agricultural Off-site flow analysis 45 (when land use not defined) Streets: Paved 100 Gravel(packed) 40 Driveways and sidewalks: 90 Roofs: 90 Lawns,sandy soil 0 Lawns,dayey soil 0 *Refer to Figures RO-3 through RO-5 in Runoff Chapter of USDCM. • JOB NO. 207-002 DATE 04/21/10 BY MLF PROJECT POLAR GAS USR C-...--..... REVISION DATE . • CIVII. RESOURCES f HISTORIC RUNOFF HISTORIC RUNOFF C2 Ctpo LENGTH(ft) AVG. %IMP. BASIN AREAS SLOPE H1 1.80 ACRES 0.13 0.43 147 3.00% 18% H2 0.98 ACRES 0.07 0.39 81 3.00% 10% TOTAL 2.78 ACRES HISTORIC TIME OF CONCENTRATION INITIALIOVERLAND TRAVEL TIME TIME(ti) (ft) t<=G+tt * BASIN C5 LENGTH SLOPE ti LENGTH SLOPE VEL. tt FINAL Ft % Min Ft % FPS Min Min H1 0.43 132 3.0% 10.00 333 1.5% 0.9 6.47 16.47 2 H2 0.39 101 3.5% 8.79 250 1.8% 0.9 4.50 13.29 2 USE MINIMUM TIME OF CONCENTRATION • •Type of Land Surface for Overland Travel Time 1;=1.8711.1-CC)Din 1= L 1=Heavy Meadow s113 60V 2=Tillage/Field 3=Shod pasture&lawns Cf=Frequency Adjustment Factor 4=Nearly bare ground C,2 and 10 year=1.0 5=Grassed waterway 6=Paved areas and shallow paved swales TOTAL HISTORIC RUNOFF Tc 12 1100 AREA Qz Qroo C Cmo BASIN (min) z (inlhr) (inlhr) (ac.) (cfs) (cfs) H1 16.47 0.13 0.43 2.10 5.75 1.80 0.48 4.44 H2 13.29 0.07 0.39 2.31 6.30 0.98 0.16 2.41 RATIONAL METHOD Q=CIA O-FLOW IN CUBIC FEET PER SECOND C-RUNOFF FACTOR A-AREA I-AVERAGE RAINFALL INTENSITY 1111 JOB NO. 207-002 DATE 04/21/10 BY MLF C-rp PROJECT POLAR GAS USR REVISION DATE • CIVIL RESOURCES ' Runoff Coefficients Weighted Coefficients (Type"B"Soil) BASIN LAND USE AREA(ac.) C2 C,0 C,00 I(%) Gravel Road 0.560 0.230 0.360 0.500 40 111 Concrete 0.020 0.890 0.920 0.960 100 Natural Grasses 1.150 0.028 0.166 0.362 2 roofs 0.070 0.710 0.750 0.810 90 Total Area 1.800 Composite 0.13 0.26 0.43 18.33 BASIN LAND USE AREA(ac.) C2 C,0 C,00 I(%) Gravel 0.200 0.230 0.360 0.500 40 H2 Concrete 0.000 0.890 0.920 0.960 100 Natural Grasses 0.780 0.028 0.166 0.362 2 Roofs 0.000 0.710 0.750 0.810 90 • Total Area 0.980 Composite 0.07 0.21 0.39 9.76 BASIN LAND USE AREA(ac.) C2 C,o C,00 l(%) Gravel 0.760 0.230 0.360 0.500 40 USR BOUNDRY Concrete 0.020 0.890 0.920 0.960 100 Natural Grasses 1.930 0.028 0.166 0.362 2 Roofs 0.070 0.710 0.750 0.810 90 Total Area 2.780 Composite 0.11 0.24 0.42 15.31 • JOB NO. 207-002 DATE 04/21/10 BY MLF PROJECT POLAR GAS USR REVISION DATE • CIVIL RES PURCES WQCV USR BOUNDARY Basin Area: 121,096.80 S.F 2.780 Acres %Impervious 15.31 % Water Quality Control Volume: 24-hr Drain Time: WQCV=a'(0.91i3-1.19i2+0.78i) a=adjustment for BMPs drain time (6-hr=0.7,12-hr=0.8,24-hr=0.9,40-hr=1.0) From fig.EDB-2: Design Volume(WQCV)=(WQCVI/12)*Area 1.2 WQCVi= 0.085 inches (from UDFCD vol 3 update) Includes 1.2 Factor of Safety for sediment accumulation Design Volume(WQCV)= 1,033 ft.^3 0.024 ac.ft. H1 Basin Area: 78,408.00 S.F 1.800 Acres %Impervious 18.33 % Water Quality Control Volume: • 24-hr Drain Time: WQCV=a`(0.91i3-1.19i2+0.78i) a=adjustment for BMPs drain time (6-hr=0.7, 12-hr=0.8,24-hr=0.9,40-hr=1.0) From fig. EDB-2: Design Volume(WQCV)_(WQCVi/12)*Area*1.2 WQCVi= 0.098 inches (from UDFCD vol 3 update) Indudes 1.2 Factor of Safety for sediment accumulation Design Volume(WQCV)= 766 ft^3 0.018 ac.ft. H2 Basin Area: 42,688.80 S.F 0.980 Acres %Impervious 9.76 % Water Quality Control Volume: 24-hr Drain Time: WQCV=a'(0.91 i3-1.19i2+0.78i) a=adjustment for BMPs drain time (6-hr=0.7, 12-hr=0.8,24-hr=0.9,40-hr=1.0) From fig.EDB-2: Design Volume(WQCV)=(WQCVi/12)'Area*1.2 WQCVi= 0.059 inches (from UDFCD vol 3 update) Includes 1.2 Factor of Safety for sediment accumulation • Design Volume(WQCV)= 252 ft.^3 0.006 ac.ft. Hello