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Home My WebLink About20160763.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 _ 1 0 _ 0 _ 0 0 _ 0 0 6 (12 digit number - found on Tax I.D. information, obtainable at the Weld County Assessor's Office, or www.co.weld.co.us) Legal Description E2/N2NW4 , Section 10 , Township 2 North, Range 66 West Zone District: Agricultural , Total Acreage: 10 , Flood Plain: N/A , Geological Hazard : N/A Airport Overlay District: N/A FEE OWNER(S) OF THE PROPERTY: Name: Cannon Land Company Work Phone # Home Phone # Email Address: 3575 E. Cherry Creek North Dr. Address: City/State/Zip Code Denver, CO 80209 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: Baseline Corporation o/b/o Certarus, Ltd. Work Phone # 303-202-5010x218 Home Phone # Email ethan@baselinecorp.com Address: 1950 Ford Street Address: City/State/Zip Code Golden, CO 80401 PROPOSED USE: Certarus, Ltd. is proposing to install a compressed natural gas (CNG) fill station. The proposed site will consist of 4 filling stations, a small office, an MCC building and a storage shed. 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 include .ndicating that the signatory has to legal authority to sign for the corporation . 10/21 /2015 Signature: Owner or Authorized Agent Date Signature: Owner or Authorized Agent Date Certarus Ltd. Suite 1250 — 555 4th Ave SW ( I Calgary, Alberta, Canada T2P 3E7 T: 1-403-930-0123 October 6, 2015 Mr. Chris Gathman Weld County Department of Planning Services 1555 N . 17th Avenue Greeley, CO 80631 Re : Letter of Authorization for the Certarus WCR 22 CNG Fill Station Subdivision Exemption and Use by Special Review Permit Dear Mr. Gathman : This letter is intended to satisfy Weld County's request for a letter of authorization for the above referenced project. Certarus Ltd. is under contract to lease a portion of Cannon Land Company property (Weld County Parcel 130910000006) . Baseline Corporation is hereby authorized to act on our behalf in processing applications for a Subdivision Exemption and a Use by Special Review. Please copy me at rsaville@certarus. com on any correspondence. Please contact me at (403) 990-7637 if you have any questions or concerns. Sincerely, Rod Saville Certarus Ltd . Suite 1250, 555 4th Avenue SW Calgary, AB T2P 3E7 CC: �� `=-`�-'' � •�� USE BY SPECIAL REVIEW BASELINE v � QUESTIONNAIRE Engineering Planning Surveying coU CERTARUS WCR 22 CNG FILL STATION Located on land in Southeast Quarter of Section 10, Township 2 North, Range 66 West of the 6th Principal Meridian Weld County, Colorado Applicant : Certarus ( USA) Ltd . PO Box 10685 Midland, TX 79702-7685 (esW1 ,9) 111/4\21 ,(E) IUM _ _ _ Initial Submittal : October 21, 2015 Table of Contents Vicinity Map pg. 3 SECTION 1 : Questionnaire 1 . Description of Proposed Use pg. 4 2. Consistency with the intent of the Comprehensive Plan pg. 4 3. Consistency with the intent of the Zoning Code pg. 5 4. Surrounding Uses pg. 5 5. Site Details pg. 5 • Number of people • Number of employees • Hours • Type and number of structures • Animals • Vehicles • Fire protection • Water source • Sewage • Storage 6. Proposed Landscaping pg. 9 7. Reclamation Procedures pg. 9 8. Storm Water Drainage pg. 9 9. Construction Period pg. 9 10. Waste Handling Plan pg. 9 11 . Dust Abatement Plan pg. 10 Certarus wCR 22 CNG Fill ration BAS E L I N E 1 Proposed Use by Special Review Certarua Ltd. - Engineering • Planning • Surveying SECTION 2: 1 . Notification Requirements pg. 11 2. Operation Standards pg. 11 3. Required Permits pg. 12 4. Traffic pg. 12 5. Fire and Emergency Response pg. 12 6. Spill Prevention, Control and Countermeasure pg. 14 APPENDIX pg. 15 Certarus wCR 22 CNG Fill ration BAS E L I N E 2 Proposed Use by Special Review Certarua Ltd. - Engineering • Planning • Surveying Vicinity Map for CertarusWCR 22 CNG Station Facility 4 _,I _ avitL, 40:1 1 �• • at: —t + -A .. +\ 1 -1\•. •.♦' ' t '.' r�. e.� -r. T ( Icy ,t♦- 4 't't 1 I ! � I TAM i 1 r y" 1, t `a al. ♦ I - + 3 ' S 1 . A! . _ maiL _ P - 1 • s eJ �` � :1y SITE • i• _,. 6 .... , , 85 Al 1 • • • f - 'P' . 4 ', /VCR 22 km, s j g _ tb Ft. Lupton is -,p y ^t, 2 ti 1I, r+ Compressor ~ 1. ) : - .L en „ I , .'t ce Station (Section 10, To unship 2N, Range 6614/) N Parcel: 130910000006 Current Ownership I nfarmation Land Owner: Cannon Land Company 3575 E Cherry Creek North Dr Denver, CO 80209 Lessee Certarus, Ltd. Certarus (USA), Ltd. 1250, 555 4th Avenue SW PO Box 10685 Calgary, Alberta Midland, TX T2P 3E7 79702-7685 Canada CertarusWCR 22 CNG Fill Station ',BASELINE 3 Proposed Use by Special Review Certarua Ltd. Engineering • Planning • Surveying Section 1 Questionnaire Application for Use by Special Review 1 . Description of Proposed Use: Certarus, Ltd has entered into an agreement with Cannon Land Company to lease an approximately 10 acres of land zoned A (Agriculture) for the purposes of constructing and operating a new compressed natural gas (CNG) fill station. A new access road off of WCR 22 will be constructed to service the site. A Subdivision Exemption will be processed along with this USR application in order to create the lot for the facility. The new CNG station is located near to the Anadarko Fort Lupton Station Compressor Station, Lancaster Cryogenic Plant, and other oil and gas support service facilities (USR- 1291 , SUP-211AM2, USR- 1002AM3, USR 12-0023, MUSR 14-0010). Certarus provides bulk CNG as a fuel alternative to oil, diesel, propane and other carbon intensive fuels. Certarus will utilize the proposed CNG Fill Station to fill its bulk Titan trailers to deliver fuel to its customers. The site will only be used by Certarus' qualified personnel. Once filled, a truck with CNG travels to the customer's location and offloads the CNG through their proprietary Pressure Reducing Skid (PRS). A customer is anyone who uses large quantities of fuel that is not tied into any infrastructure. The majority of our customers tend to be oil and gas drilling locations to this point. CNG with this platform provides the same power and mobility as diesel; however it reduces the cost and emissions. Ownership Information As seen on Assessor Record: Contact: Contact: Cannon Land CO Blake O'Steen Rod Saville 3575 E. Cherry Creek North Operations Manager Engineering Manager Denver, CO 80209 PO Box 10685 1250, 555 4th Avenue SW Midland, TX 79702 Calgary, AB, T2P 3E7 2. Consistency with the intent of the Weld County Code, Chapter 22 of the Comprehensive Plan Certarus has reviewed the Comprehensive Plan as outlined in Chapter 22 of the Weld County Code and believes this project is consistent with its guiding principles. Section 22-2- 10(D) emphasizes extraction of natural resources as an important part of the economy and should minimize impacts to agricultural lands. The proposed 10 acre facility will be located on lands leased by Certarus that are currently non-irrigated rangeland that is located in a rural area with existing oil and gas activity. Certarus WCR 22 CNG Fill Station 4 Proposed Use by &peci al Review VBASELINE Certarus Ltd. Engineering • Planning • Surveying 3. Consistency with the intent of the Weld County Code, Chapter 23 (Zoning) and the zone district in which it is located. The CNG fill station is classified by Weld County as an Oil and Gas Support and Services facility. Section 23-3-40.A.2 of the Weld County Code states that these facilities are uses allowed to be constructed, occupied, operated and maintained in the A (Agricultural) Zone District only upon approval of a Use by Special Review permit in accordance with the requirements and procedures set forth in Article II, Division 4 of Chapter 23 . 4. Surrounding Uses and Compatibility with surrounding uses The proposed Certarus WCR 22 CNG Fill Station is surrounded by agricultural properties and existing oil and gas facilities. Certarus plans to utilize this site to compress natural gas in order to supply multiple large volume consumers who will then utilize the gas for drilling operations. There are several other oil and gas support service facilities in the area, such as compressor station, cryogenic plant, and others. 5. Describe the following: a Number of people who will use this site During the operations phase, the site will be visited by up to two (2) people each day for operation and maintenance purposes for short periods of time. Approximately six (6) truck drivers will visit the site each day to fill tankers with CNG. b. Number of employees proposed to be employed at this site Upon completion of construction, the Certarus WCR 22 CNG Fill Station will not have full time personnel on site. The office building will be utilized when employees do visit the site. a Hours of operation The facility will operate 24 hours a day, seven days a week. However, typical access in and out of the facility will occur during daylight hours. d, Type and number of structures to be built on site • 1 Office Building (Pre-built) • 1 Conex Storage Container • 1 Transformer • 1 Inlet Skid • 1 Compressor/ MCC Building Certarus WCR 22 CNG Fill ration BAS E L I N E 5 Proposed Use by Special Review Certarua Ltd. - Engineering • Planning • Surveying • 4 Fill Stations • 1 Concrete Dolly Pad • 2 Yard Lights • Perimeter chain link fencing and security gates �� r 3 1 I ! I CLEANGAS® TECHNOLOGY.. hi' ( , O T A i L-131 I ' ' •�M awl..-. .r�-IL))(/ 1 1 4 A si•S.‘ w \/ "�"_ 1 • ..mot .^.^�.��,'\�:.•'e ^ iY,PAS . : i'j{ .- - _ A' I r.4- Sr'F�A•; :3( _ •. ,tip:vas r� � '' -_-... IS 4 a - -- .i-i- •-. -. - _ - _ Example Compressor and CNG Tank Trailers T 'Sikora., r imm.,..., III i. SI ►I '. 1 Li irei Ill 11171 1 II �I;l r 1 ________-- , .. f, . rli 4 -- --- ------—---- pwe4 , blir Am.." lir . % . _ • 1 I 11 , Ilk _ ;we_ ,- r" Example Pre-built Office Building Certarus wCR 22 CNG Fill ration BAS E L I N E 6 Proposed Use by Special Review Certarua Ltd. Engineering • Planning • Surveying 1 "T it sr -ma 1 ' J . x . .' ' 1 i i _ / r i i ji i it i '� , . I I j 1 gr N J . ! r # 1 i r• r Example Fill Post and Associated Lighting (Colorado site will not have overhead racks - to be buried) a Type and number of anima! if any, to be on this site No animals will be kept on the site. f. Kind of vehides (typa size, weight) and how often Facility traffic will flow to and from the site daily at intermittent times during mostly daylight hours. Types and quantities of vehicles accessing the site will consist of up to six Certarus wCR 22 CNG Fill ration VBASELINE7 Proposed Use by Special Review Certarua Ltd. , Engineering Planning Surveying (6) semi-trucks for gas transport and up to two (2) 3 ton pickup trucks. Please see the Traffic Impact Assessment. g. Who will provide fire protection to the site The property falls within the Platteville—Gilcrest Fire Protection District. A referral packet will be sent to the district by Weld County upon application for the USR. h. Water source on the property(both domestic and irrigation) No full time personnel are on site. No permanent water source is required for this facility. Employees that use the site will use bottled drinking water. The water tank is located next to the office and has a capacity of 3,300 gallons is in a heated sea box and is insulated. i. Sewage cisgosal system on the property (existing and proposec4) Certarus will utilize an above ground tank to hold sewage waste. The toilet is located within the office and the tank will be located outside in a standalone unit that sits behind the office. The sewer tank is foamed to prevent freezing. It is serviced by a private company. An example photo is provided below. iii 1 i x.l , I i i Y I r . i (i Y . a ,,.,1;,YY� Cl/T1MHL I ril..An. .d .:`IIL:. , i Ilk I kt �t t.ti t _. ti y; . . • k. w _ . 1 r . rsi l i _tii,..., -,, S t? 4,. .. % _. 'Sr I.YY.�d Front view Rear view j. I f storage or warehousing is proposed what type of items will be stored A small storage shed (conex container) will be installed on site to store spare parts, namely hoses, and tools. No additional large equipment storage is proposed on site. Certarus wCR 22 CNG Fill ration BAS E L I N E 8 Proposed Use by Special Review Certarus, Ltd. - Engineering • Planning • Surveying 6. Proposed Landscaping After the CNG fill station is installed, reclamation for those portions not necessary for operations would be reseeded. The site and accompanying equipment area would be graveled and graded for positive drainage. A standard 6-foot chain link fence with an additional 2-foot angled extension of three strands of barbwire will be installed around the perimeter of the site. No further landscaping is proposed. 7. Proposed Redamation Certarus has no intentions of ceasing operations of this facility once it is operational. This facility is intended to be a long-term operation, however should the WCR 22 CNG Fill Station no longer be needed, equipment will be removed from the site and any vegetation on site will be returned to previous conditions and comply with County standards. 8. Storm Water Drainage The facility is located on a relatively flat parcel. All necessary grade work will be performed to prepare the site for its intended use. However, based on the layout of the site, it is not expected that this pad will require a large amount of grading work. The site will be surfaced with gravel. Please see the Drainage Memo included with this application. 9. Construction Period Construction of the CNG fill station is anticipated to commence upon the approval of this USR. Certarus is aiming to complete the construction within six (6) weeks. However, previous experiences indicate that the construction could take up to nine (9) weeks. 10. Waste Handling Plan Certarus does not intend to store any waste on site. All waste produced by the personnel on site will be disposed of in a small dumpster that will be placed on site. The dumpster will be serviced by the Waste Management company. Certarus has entered into an agreement with Civeo, a global workforce accommodations specialist, who will, in addition to providing the office structure, provide wastewater removal services. Certarus anticipates that the following wastes will be generated at the site: • Light bulbs • Spent batteries • Rags and absorbent socks and pads • Hydrocarbon impacted soil from minor leaks and vehicle traffic Certarus WCR 22 CNG Fill Station 9 Proposed Use by &peci al Review MBASELINE Certarus Ltd. Engineering • Planning • Surveying • Used packaging material, including cardboard, scrap lumber from crates, metal strapping, etc. 11 . Du& Abatement Plan During the construction phase of the project, Certarus will use water or magnesium chloride trucks for dust suppression. Soil erosion will be mitigated through the appropriate use of best management practices. After construction is completed, Certarus will gravel the access and the compressor pad location and water or magnesium chloride application will be applied on an as-needed basis. Certarus wCR 22 CNG Fill ration BAS E L I N E 10 Proposed Use by Special Review Certarua Ltd. - Engineering • Planning • Surveying SECTI ON 2 1 . Notification Requirements County Notices Section 23-2-210(B)(1): Upon application completeness, agency notice submittal (28 day comment period). This step is completed by Weld County staff fiction 23-2-210(B)(6), a sign shall be posted by the County on this proposed site. This step is completed by Weld County staff Section 23-2-210(8)(4): Notice to owners of property within 500 feet of the parcel. As per 23-2-260(B)(9), the list attached was created from Assessor records of Weld County on September 24, 2015. 2. Operational Standards Ndse Control: The operation of the facility shall comply with the noise standards enumerated in Section 25-12- 101 , C.R.S. Minimal noise emissions are expected from this site. Noise sources are expected to be limited to vehicle traffic and the compressor, which is an electric motor driven unit. Air and Water Quality: All activities will be in compliance with the permit and control provisions of the Colorado Air Quality Control Program, Title 25, Article 7, and C.R.S. as applicable. No waste water will be discharged on the surface of the site. Human wastes will be contained to the vault on site. Lighting: Lighting on the site will be downcast and shielded. Light posts will be placed around the fill stations and the compressor. The purpose of the lights is to provide lighting during the evening and night hours. Lights will be activated by a light sensor to ensure continuous light and that the lights will be turned off during daylight hours. Weed Control : The facility will be kept free of weeds, rubbish, and other waste material. The area shall be treated if necessary and as practicable to prevent invasion of undesirable species and noxious weeds. Certarus WCR 22 CNG Fill Station 11 Proposed Use by &peci al Review MBASELINE Certarus Ltd. Engineering • Planning • Surveying 3. Required Permits Weld County: A Use by Special Review Permit requires approval by the Board of County Commissioners. Access to the site from WCR 22 requires an approval of an access permit approved by the Weld County Department of Public Works. A grading permit will be required. Platteville Gilcrest Fire Protection District: The Site Plan and Use by Special Review Application will be referred to and reviewed by the Platteville—Gilcrest Fire Protection District. Oversize Load Permits If necessary, oversize load permits will be obtained prior to moving any new equipment onto the site. Certarus will submit any additional permits necessary for county approval prior to the commencement of construction. 4. Traffic Please see the Traffic Impact Assessment. 5. Fire and Emergency Response There is adequate provision for the protection of the health, safety and welfare of the inhabitants of the neighborhood and the county. All roads leading to and those in the site area are designed and maintained to support fire apparatus. Sufficient turnaround room to accommodate fire apparatus is present. Certarus support personnel in the field are on call to provide technical assistance in fire prevention and suppression. Certarus WCR 22 CNG Fill Station BAS E L I N E 12 Proposed Use by Special Review Certarua Ltd. — Engineering Planning Surveying Emergency I nformation General I nformation: The purpose of this document is to provide ownership information in case of an emergency at the proposed Certarus WCR 22 CNG Fill Station. It may be used by outside agencies, company employees, and contract labor to help secure a safe and swift recovery from such emergency situations: a. Name and Address Corporate Office (USA) Certarus (USA) Ltd. PO Box 10685 Midland, TX 79702 Corporate Office (Canada) Certarus, Ltd. 1250, 555 4th Avenue SW Calgary, Alberta T2P 3E7 Canada b. Type of Facility- Compressed Natural Gas (CNG) Fill Station. c. Location and Access, Located on WCR 22 approximately 2 3/4 miles east of the intersection of US Highway 85 and Weld County Road 22 in the SE/4, Sec. 10, T2N, R66W, 6th PM. Emergency Contact List: The following is a list of Certarus personnel and organizations that may be contacted in the event an emergency occurs at the facility. Contact Office Phone Cell Phone Chris Schatz — Area Superintendent 720-552-7761 Rod Saville — Engineering Manager 403-930-0120 403- 990-7637 Blake O' Steen — Texas Operations 361 -446-2823 Ivan Heidecker — Certarus, CEO 403-930-0112 403-466-9072 24-H our Emergency Number 1 -877-500-7761 Certarus WCR 22 CNG Fill Station VBASELINE 13 Proposed Use by Special Review Certarua Ltd. — Engineering Planning Surveying 6. Spill Prevention, Control and Countermeasure SPCC plan is outlined in the Certarus Health Safety and Environment (HS&E) Management manual section 5.24 Environmental Spill/Release Containment & Response and 5.25 Environmental Spill/Release Notification and Reporting. These sections outline specific steps to be taken in the event of a spill or release of environmentally harmful substances. The HS&E manual is provided with this USR application. On Behalf of Certarus, Ltd. this Report has been prepared by: ‘BASELINE Engineering • Manning • Surveying Corporate Headquarters Golden Office 1950 Ford Street Golden, CO 80401 303-202-5010 or 303-940-9966 www.baselinecorp.com Certarus WCR 22 CNG Fill Station 14 Proposed Use by Special Review VBASELINE Certarus Ltd. Engineering Planning • Surveying ).o coy,4/A Weld County Public Works Dept. S� -L 1111 H Street ACCESS PERMIT -O P.O. Box 758 G - •• *' Greeley, Co 80632 APPLICATION FORM � jc W0� Phone: (970)304-6496 Fax: (970)304-6497 Applicant Property Owner (If different than Applicant) Name Ethan Watel , Baseline Corp . Name Cannon Land Company Company Address 3575 E . Cherry Creek North Dr. Address 1950 Ford St. City Denver State CO Zip 80209 City Golden State CO Zip 80401 Phone Business Phone 303-202-5010 Fax Fax E-mail ethan@baselinecorp . com E mail p ' = Existing Access ? = Proposed Access Parcel Location & Sketch The access is on WCR 22 Nearest Intersection : WCR 31 & WCR 22 WCR Distance from Intersection 1 mile Parcel Number 130910000006 S10/T2N/R66 31 Section/Township/Range T C.1 u Is there an existing access to the property.YES NO N 3 3 Number of Existing Accesses 1 Road Surface Type & Construction Information . Asphalt n Gravel Ill Treated C )ther Rec. Asphalt WCR 22 Culvert Size & Type TBD Materials used to construct Access Construction Start Date TBD Finish Date Proposed Use ®Temporary (Tracking Pad Required)/ $75 is Single Residential/$75 II Industrial/$150 n Small Commercial or Oil & Gas/$75 a Large Commercial/$150 0 Subdivision/$150 II■ Field (Agriculture Only)/Exempt Is this access associated with a Planning Process? No Cia( USRJ II RE ® PUD ® Other SE 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 facilitie construction. Signature Printed Name Ethan Watel Date 10/21 /2015 Approval or Denial will be issued in minimum of 5 days. Approved by Revised Date 6/29/10 LOOKING LEFT OUT OF THE SITE (EAST) ._.tip :'Y:. �'='""-• _ a x9 " • d; • LOOKING RIGHT OUT THE SITE (WEST) I. I.. _ . . - - - - • • • • Y. . M1 • • . • LOOKING INTO THE ACCESS (NORTH) • .r- . . - i N ;' TRAFFIC IMPACT ASSESSMENT To: Weld County CC: Baseline Project File —317 Certarus WCR 22 CNG Fill Station From: Baseline Corporation Date: October 5, 2015 Re: Certarus WCR 22 CNG Fill Station Traffic Impact Assessment OVERVIEW This traffic impact assessment is prepared to accompany the USR application for the Certarus WCR 22 Compressed Natural Gas Fill Station, a facility to be located in Weld County, Colorado. This facility will be located in SE/4, Section 10, Township 2 North, Range 66 West of the 6th P.M . The proposed site will house a Compressed Natural Gas (CNG) Fill Station. Most of the traffic required for the proposed CNG gas facility will be present during the initial construction. Then a small amount of traffic will be present for the duration of the facility's production cycle. To demonstrate the traffic associated with the proposed site, below is an overview of the long term traffic related to a CNG Fill Station site. BACKGROUND Traffic access: The site will utilize a new access located off of WCR 22. Currently, the proposed location for the site access provides the best and most logical access for the site. No other road or access point serves this section of the property. Operational Equipment: The new production facility will consist of 4 fill stations, a compressor, conex storage building, an electrical building, and an office. This equipment is proposed and is planned for construction upon approval of a Use by Special Review permit. The information below assesses current traffic generation associated with the site operations. TRIP GENERATION Operational Traffic: The following table summarizes the anticipated traffic generation numbers per day on the proposed site. All traffic numbers are spread over a 24-hour period . Traffic numbers are separated based on the operational phase with which they are associated . The following vehicle summaries have been used to determine the anticipated traffic generation numbers: • Overall Employees — up to 2 per day, — 4 trips • Average Daily Fill Trips: (semi-truck) — 6 daily ( 12 trips) 1 Table 1. Operational Traffic Trip Generation Summary Table Phase Maximum Employees/ Daily Vehicle Daily Vehicle /Trucks Trips PCEs* Average Daily Operation Employee Trips 2 employees/day 4 vehicle 4 PCE/day trips/day Semi-Truck Trips 6 trucks/day 12 truck 36 PCE/day trips/day Total Daily Trips 40 PCE/day *PCE = Passenger Car Equivalent. TRAFFIC HOURS Traffic associated with the site will be spread over a 24-hour time period . Traffic will not be restricted to just one period of the day. The number of trucks accessing the site will depend on the compressed natural gas demand . Certarus estimates that the activities on site will equate to a maximum of 6 semi- truck trips per day. HAUL ROUTE The site will utilize the proposed access located on WCR 22 approximately 3.0 miles east from the intersection of US Highway 85 and WCR 22. Leaving the site, the truck traffic will have the ability to go east or west on WCR 22. Going east: From the site access, the truck traffic will have the ability continue east on WCR 22 until it reaches the intersection of WCR 22 and WCR 49. From here the truck traffic will then continue north or south on WCR 49 to its destination. Going west: From the site access, the truck traffic will have the ability to continue west on WCR 22 until it reaches the intersection of WCR 22 and US Highway 85. From here the truck traffic will then continue north or south on US Highway 85 to its destination . Please see the haul route map in appendix 1 from more details. CONCLUSION The ongoing use of the site and associated traffic is consistent with the existing uses on surrounding properties with exiting traffic onto WCR 22 . The intersection of WCR 22 and US Highway 85 has adequate line of site for proposed traffic volumes. In addition deceleration lanes and acceleration lanes exist on Highway 85 for all movements at its intersection with WCR 22. Prepared under the supervision of Vincent Harris, AICP Vincent Harris, AICP Baseline Corporation 1950 Ford Street Golden, Colorado 80401 (303) 202-5010 2 APPENDIX 1. . iNit.k t • �� c�: a', it . -g r , , It r n -. ;''.,.-1 • at *Se •• \ tie -.A. ii. nit P VI ('K 41 �r E.")_ .� r 1.1 _ Sr t II 1♦ ^7 'AC Xik 4- C4 fine 7 r -� y we j - i.ta .si Cr 4 W • -t 1T • W Cl' - �I - - - - - _-- - R L A r '' • f r r /. y rj.• i . is' S Its cIt.— al; . it i•..4. .{:-crr • P , _ it !h � `• _ I• ill'' Or - WI 41 . . CI , . , . . to - -s 3 November > , 2015 Mr. Chris Gathman Weld County Department of Planning Services 1555 N . 17th Avenue Greeley, CO 80631 Re: Limited Letter of Authorization for the Certarus WCR 22 CNG Fill Station Subdivision Exemption and Use by Special Review Permit Dear Mr. Gathman : This letter is intended to satisfy Weld County's request for a letter of authorization for the above referenced project. We are the current owners of the property known as Weld County Parcel 130910000006 (the "Land") . A ten acre parcel , more or less, of the Land is leased to Certarus (USA) Ltd . Certarus and its consultant Baseline Corporation are hereby authorized to act on our behalf in submitting and processing applications for a Subdivision Exemption for the temporary use of the indicated 10-acre parcel for oil and gas facilities and a Use by Special Review permit related to Certaru's planned compressed natural gas (CNG) fill station . Any lot created by an approved Subdivision Exemption must cease to exist upon termination of the lease. The authorization granted by this letter is expressly limited as described herein . Certarus is not authorized to effect any permanent changes to the current zoning or other classification of the Land or apply for approval of use of the Land other than as described in this letter. Please copy Cannon Land Company at the address below on all correspondence and decisions with respect to Certarus's applications. Please contact me at (303) 321 -6900 if you have any questions or concerns. Sincerely, 6,5,itziv\ Brown Cannon Cannon Land Company 3575 Cherry Creek North Drive Denver, CO 80209 E-mail: bcannon467@aol . com CERTIFICATION OF COMPLIANCE ENGINEERING DESIGNED TO WELD COUNTY CODE STANDARDS AND CRITERIA I NoAk a 1iEMt''teR.S , Consultant Engineer for CERT/.aRU5 LTD. ("Applicant"), understand and acknowledge that Applicant is seeking land use approval of ("X,R 22 Cr4G Ftt.A., ST,'•not./ ("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. ` . fl 'O 0 L ie Y ....i. ,...• 11/ (Engineer's Stamp) p ;• �'`/ ' ,tp 0• e C fee' 2. 1S -16�`n: 0 4820 to ' J r Engin • . gees ', ignature VARIANCE REQUEST N/4 I ) 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 1/13/15 PREPARED FOR : CERTARUS LTD . USR1515-0077 LOCATED IN A PORTION OF THE SE % OF SECTION 10, TOWNSHIP 2N, RANGE 66W OF THE 6TH P . M ., COUNTY OF WELD, STATE OF COLORADO STORM STORMWATER FACILTIY MAINTENANCE PLAN PREPARED BY : BASELINE ENGINEERING CORPORATION 1950 FORD STREET GOLDEN, CO 80401 February 15, 2016 JOB # PL317 CERTARUS VBASELINE a Engineering • Planning • Surveying I . Reasons for Stormwater Facility Maintenance A. Compliance with Standards B . Preventive Measures to Reduce Maintenance Costs II . General Location and Description of Stormwater Management Facilities A. General Site Description III . Stormwater Management Facilities IV. Appendices Appendix A - Site plan Appendix B - Construction drawings Appendix C - Inspection Form (s) Appendix D - Maintenance Form (s) Appendix E - Stormwater Facility Maintenance Notification Form I. Reasons for Stormwater Facility Maintenance A. The purpose of this plan is to ensure property owners follow proper operation and maintenance procedures for stormwater management facilities located on their sites. Requirements for inspection and maintenance, as well as reporting requirements are located in this Stormwater Management Facility Guidance Document. Additional information can be found in the Urban Drainage Manual or by contacting the Weld County Engineering Division . B. Preventive Measures to Reduce Maintenance Costs The most effective way to maintain your water quality facility is to prevent the pollutants from entering the facility in the first place. Common pollutants include sediment, trash and debris, chemicals, pet wastes, runoff from stored materials, illicit discharges into the storm drainage system and many others. A thorough maintenance program will include measures to address these potential contaminants, and will save money and time in the long run . Key points to consider in your maintenance program include : • Educate property owners/residents to be aware of how their actions impact water quality, and how they can help reduce maintenance costs. • Keep properties, streets and curb & gutters, and parking lots free of trash, debris, and lawn clippings. • Ensure the proper disposal of hazardous wastes and chemicals. • Plan lawn care to minimize the use of chemicals and pesticides. • Sweep paved surfaces and put the sweepings in a compost pile or back on the lawn. • Be aware of automobiles leaking fluids. Use absorbents such as cat litter to soak up drippings — dispose of properly. • Re-vegetate disturbed and bare areas to maintain vegetative stabilization . • Clean out the upstream components of the storm drainage system, including inlets, storm sewers and outfalls. • Do not store materials outdoors (including landscaping materials) unless they are properly protected from stormwater runoff. II. GENERAL LOCATION AND DESCRIPTION A. General Site Description The subject property is located in the southeast 1/4 of Section 10, Township 2 North, Range 66 West of the 6th P. M ., Weld County, Colorado. Site Plans are included for reference. Weld County Road 22 is adjacent to the site on the south . There are no known channels, irrigation ditches, or streams adjacent to the site. There are no known developments surrounding the site. In order manage stormwater runoff to prevent flooding and downstream erosion, and improve water quality; a stormwater detention pond is incorporated into the development and proportionately sized according to the contributing basin area and runoff volume. III. STORMWATER MANAGEMENT FACILITIES 1 Inspection Inspect the pond at least annually. Note the amount of sediment and look for debris. 2 Debris and Litter Removal Remove debris and litter from the pond as needed . 3 Aquatic Plant Harvesting Harvesting plants will permanently remove nutrients from the system, although removal of vegetation can also re-suspend sediment and leave areas susceptible to erosion . Additionally, the plants growing on the safety wetland bench of a retention pond help prevent drowning accidents by demarking the pond boundary and creating a visual barrier. For this reason, UDFCD does not recommend harvesting vegetation completely as routine maintenance. However, aquatic plant harvesting can be performed if desired to maintain volume or eliminate nuisances related to overgrowth of vegetation . When this is the case, perform this activity during the dry season ( November to February). This can be performed manually or with specialized machinery. If a reduction in cattails is desired, harvest them annually, especially in areas of new growth. Cut them at the base of the plant just below the waterline, or slowly pull the shoot out from the base. Cattail removal should be done during late summer to deprive the roots of food and reduce their ability to survive winter. Weekly mosquito inspections with targeted treatments are frequently less costly and more effective than regular widespread application of insecticide. 4 Mosquito Control Mosquito control may be necessary if the BMP is located in proximity to outdoor amenities. The most effective mosquito control programs include weekly inspection for signs of mosquito breeding with treatment provided when breeding is found. These inspections and treatment can be performed by a mosquito control service and typically start in mid-May and extend to mid-September. The use of larvicidal briquettes or "dunks" is not recommended for ponds due to their size and configuration . 5 Sediment Removal Remove sediment before it becomes a significant source of pollutants for the remainder of the pond . More frequent removal will benefit long-term maintenance practices. Sediment removal in should occur approximately once a year or when build up of sediment results in excessive algae growth or mosquito production . Ensure that the sediment is disposed of properly and not placed elsewhere in the pond . 6 Sediment Removal from the Pond Bottom Regrading of the pond bottom may be required every 10 to 20 years to maintain volume and deter algae growth . This typically requires heavy equipment, designated corridors, and considerable expense. Harvesting of vegetation may also be desirable for nutrient removal . When removing vegetation from the pond, take care not to create or leave areas of disturbed soil susceptible to erosion . Appendix A - Site plan CERTARUS LTD. _=_ c USR15-0077 og -- - 8 SOUTHEAST 1/4 OF SECTION 10, T2N, R66W, 6TH RM., ell a c6 I COUNTY OF WELD, STATE OF COLORADO I I I • W I G., O o FL p.:e Ir t I-CO . o � o T g2 g GAS /� / UhJ GAtiI h4�� l_ - - - - - - _ - _ -_- - _ I - _ - GAS -_ _ _ / - - _- - - - _ 6AS —C�-or.�� - - - - - - - - - I ----- ice_ G - - - - \ 1 I / - - - _ _ 4S As _ _ \ \ 1 1 / - _ - - —� GAS GAS \ SS®�� - - m >o \I 1 1 } — _ — - - - GAS GAS GA �9s �®ate 00 - - - -- - - - > 5 U f U W � \ 1 1 I I / 50' ANADARKO — - - - cas - - - - - - - - - o 1 30' ANADARKO - - -, , ____________ , , \ , S 82'55'i-inn I I I I / PIPELINE EASEMENT 30' ANADARKO \\-- - - - - - - _ GAS tLn� — - - - - - _ _ \ 1 1 — _ S 82'55'08° E I I I I I PIPELINE EASEMENT pIPELJNE EASEMENT 9 - - ----_ - - G s — A.s —�@ - - \ \ 1 , I I I / (REC. N0. TBD) s — - - - � s—�_ \\ \ \ \ \\ 661.87 N. l I / (REC. N0. 4147502) 7 - - - -(SI — — - - � GA GAS as/ �� a 770.\\\ \ � \ \ � \ N \ N \ N x - - - _, ,\__ caste N. � � \ \ \ N. \ N. \ \ \ N m 70\ \ (J)> - \ I N a • / I co cy, o \ r' $ it (PI cn 1 1 \ LI- a I 09 dcn \\ \\ °� o o x vs \ c9`s N.N. % xq 995, ` 1 N. N. \ I 1 I ••••••••• / /1 / EARTHEN BERM FROM EXCESS FILL\ G w . s N. I I 1 % / / / / / °' \ as/ /i , \ \ \ \ 0- RI \ \ 1 1 / I 2 �� 0 0 oT 0 0 0 0 `o o�o -o ro - o - o ,o ,` ..--- ,..4."— R=55'1 ci � s / / / \ R=55' / \ / I /l / I 1 \ ti a a \ z / / � � �/ I 1 / / I 1 N� �� 00 �� / / I / / / 1 / / 1 / / / / / I 3 ! i \ / I 1 I I EXISTING G \ h tY / FENCE TO BE o / / / 1 w o / REMOVED ➢ z / 2v „5 / / ' o / SIZE SURFACE - GRAVEL / / / // / // / 01 \ \ GD. 0 I \ 5 0 O w , � / / / / / / I \ \ W � ' - o i re / / / / / \ I D: / = ° \ / / / \ °I \ \ o ! \ e \ / ` � S \ \ x n o \ \ \ \\ \\ \ \ o \\ (\ I TRANSFORMER r � I~I , In \ \ °I \ \ \\ \ 0> `a' `Q' fn o \ \ \ \ ) \ \ I \ \ x BURIED ANADARKO GAS J \ \ ° CONCRETE 1 i_ \ \ 129' \ \ ►I -"-j 12' MCC BUILDING & COMPRESSOR of GATESECU \ PIPELINE CONNECTION (TYP) n C I DOLLY PAD WITH HOLE FOR \ \ �X- w U I- GO ) / , ° �, 113' • . - Q ELECTRIFICATION \ \ N 89'17 25 EEn a �19 l i 6' I / - 7 ,,„7-17A max/ 740.44' ; o M Z Q' I / / an I / INLET SKID \ \ x _x GAS o `� O to + / / / o �� 7 i / GAS GAS 23A\S GAS \ GAS o- w GArs GAS GAS GAS GAS GAS GAS o co / / TRUCK FILL POST (TYP) yp / I °�` ' - �r \ x/ o •� 4 �x o c9 l '// / O - 34' (T I r ) JF \ / 16, �Y / I \\ \ x�X .J 89 17'25" W n n n n n �n n n nn[ � N I a f4'J- 740.45 / / / \ / I 1 I ' / / ' \ \ / \ 1 I / x x / I / I \ H 50' --I + / d / L� z _ ___ -„i I I I 1 ° . I I I / z g - - - ° 1 I I °I I G� �••� C_D N J / � � I zap I o � � � � � / I 1� C \ \ CONEX 1\ I \ y4''� x - - - x M+ U N _ W / — h STORAGE UNIT 1 \ / �� / / w \ \\ O� COLORADO INTERSTATE GAS KERR-McGEE GAS N I- -I / \ / OFFICE BUILDING /� _ \ \ G I E�"/I o _ > 1 ce- f� I SECURITY GATE , / WITH ISD5 VAULT / R=55 . F44 U - - - ,ri . 1 R=55 \ p CV N - - O N \ I L:r4 ET) co \ MIN. 15" CMP BENEATH 1 I o \ V ACCESS LENGTHEN PIPE / n x INSTALL DOUBLE CATTLE GUARD .: 4D. '""' I x x x x�x x x c x �' x x x x x x x x x x x x x x x x x x cn w o x x x x x x x x x x -.......... ........... x AS NECESSARY / \ in N -x VEHICLE TRACKING CONTROL PER / / \ � Q N -, WELD COUNTY SPECIFICATIONS \ o \ EXISTING / o / / I \ \ I Y z x r x x- x \ FENCED BE \ / W w cJ� ` x x x�—x x x x x / > S - - \ i ` �x x -x� x x x x x x x R1 D Q En REMOVED (TYP) N. .. ,/ -x x x � — �x x x x—max x x — x x x — — \ — — ` 0�a, - — a , _ — GAS S C � 79 -x x x x x n-t -n- - �L X - - - , .. - - —7— I - 7 l� / �� T T T T T T = -_ -_ T _T — 2,T > - - „N. ct- �_~_ - - T- -_ -T� _ � � - - - _, i - T �� f� �` T -,_z - T�� i T T T o _ _ _ � 3 - - - - i - _ _ _S — — - T = - - = T- -_ . :: :_ - - 7- -- ---- -T's -r S 89`IT25" W — � � � r— _ — - -� / 9'1724 W 973� / - - --f= - -�� / - - h � -F - - - - - - - - - cn _ _ _ _ R 60 U - / � - - - ,a 656.00' 12 s /T S 8 I I I I I SOUTHEAST CORNER 8 / rT ` \ W \ 1 SEC. 10, T RNER E \\ I COUNTY ROD �'�' I - - ] — — - — — — — — — — — — — — — — — — FOUND 21 /2" ALUM. CAP — — — — — — — — — — — — — — — — 4 - - - - — — — - MARKED "LS 19585, 1993" - - r PREPARED UNDER 7HE DIRECT co L \ F LEGF \ D SYMBOL LEGEND N SUPERVISION OF MINOR CONTOUR (1 ') CONCRETE PAVING - - kk I g OVERALL SITE PLAN — MAJOR CONTOUR (5') I ' ' :'. ° I n 2 2 - - EDGE OF GRAVEL RECYCLED ASPHALT EDGE OF ASPHALT SUBJECT PROPERTY LINE • - - HISTORIC DRAINAGE FLOW EASEMENT T EXISTING UNDERGROUND TELEPHONE FOR AND ON BEHALF OF BASLNE COIBEHAL ION at - — EXISTING RIGHT OF WAY INITIAL suewTTAI 10/21/2015 r CAS GAS EXISTING GAS PIPELINE DRAWING SIZE 24° x 36° SURVEY FIRM SURVEY DATE v x x xx- EXISTING CHAIN LINK FENCE GRAPHIC SCALE EEC 10/2015 50 0 50 100 Joe NO. PL317 c� 0 0 0 o PROPOSED CHAIN LINK FENCE I I I I I I DRAWING NAME --- GAS PROPOSED GAS PIPELINE EL (IN FEET) 317 Certorus ONG USR.dwg -- 1 INCH = 50 FT SHEET 2 OF 3 U2 Appendix B - Construction drawings 0 i -:,,, CERTARUS LTD. _ _ ==_ e... g ,0 . USR15-0077 =-= == = c,. SOUTHEAST 1/4 OF SECTION 10, T2N, R66W, 6TH P.M, I oI COUNTY OF WELD, STATE OF COLORADO CONTACTS ® 1 43 0 o COVER SHEET . • APPLICANT CERTARUS LTD = i- G ROD SAVILLEcc STANDARD FROSION AND SFDIMFNT CONTROL NOTES: 1250, 555 4TH AVE SW = y • SHEET INDEX CALGARY, AB T2P 3E7 0 co 1. LANDOWNERS AND/OR CONTRACTORS ARE RESPONSIBLE FOR OBTAINING A PERMIT FOR STORMWATER DISCHARGES ASSOCIATED WITH CANADA 0 cri rn CONSTRUCTION ACTIVITIES FROM THE COLORADO DEPARTMENT OF HEALTH & ENVIRONMENT (CDPHE), AT LEAST TEN (10) DAYS PRIOR TO THE (403) 930-0120 START OF CONSTRUCTION ACTIVITIES IF CONSTRUCTION ACTIVITIES WILL DISTURB 1 (ONE) OR MORE ACRES OF LAND, OR IF THE PROJECT BELONGS rn vs TO A COMMON PLAN OF DEVELOPMENT THAT WILL DISTURB 1 (ONE) OR MORE ACRES. IN THE EVENT THAT LOT/PARCEL, WHICH BELONGS TO A C1 — COVER cz COMMON PLAN OF DEVELOPMENT THAT DISTURBED 1 (ONE) OR MORE ACRES, IS SOLD THEN THE NEW LANDOWNER AND/OR CONTRACTOR IS C2 - GRADING AND EROSION CONTROL PLAN RESPONSIBLE FOR OBTAINING PERMIT COVERAGE FOR THAT LOT/PARCEL. OWNER CANNON LAND COMPANY 2. LANDOWNERS AND/OR CONTRACTORS ARE RESPONSIBLE FOR OBTAINING A GRADING PERMIT FROM WELD COUNTY IF CONSTRUCTION ACTIVITIES C3 - DETAILS EROSION CONTROL 3575 E. CHERRY CREEK N. DR. WILL DISTURB 1 (ONE) OR MORE ACRES OF LAND, OR IF THE PROJECT BELONGS TO A COMMON PLAN OF DEVELOPMENT THAT WILL DISTURB 1 DENVER, CO 80209 (ONE) OR MORE ACRES. C4 - DETAILS DRAINAGE 3. THE PERMITTED LANDOWNER AND/OR CONTRACTOR MUST KEEP A COPY OF THE CDPHE STORMWATER DISCHARGE PERMIT, STORMWATER C5 - DRAINAGE PLAN a O! O L MANAGEMENT PLAN (SWMP) AND INSPECTION LOG AVAILABLE ON-SITE THROUGHOUT THE DURATION OF THE PROJECT, AND FOR AN ADDITIONAL WELD COUNTY PLANNING CHRIS GATHMAN g O i O 1 THREE (3) YEARS AFTER INACTIVATION FORM IS FILED WITH THE STATE. AI , DEPARTMENT 1555 N 17TH AVE S$ 6 N GREELEY, COLORADO 80631 4. THE PERMITTED LANDOWNER AND/OR CONTRACTOR MAY INACTIVATE THE STATE PERMIT WHEN FINAL STABILIZATION IS REACHED. AS LONG AS WCR 22CITE (970) 353-6100 X3540 ALL SOIL DISTURBING ACTIVITIES AT THE SITE HAVE BEEN COMPLETED AND A UNIFORM VEGETATIVE COVER HAS BEEN ESTABLISHED WITH A DENSITY OF AT LEAST 70 PERCENT OF PRE-DISTURBANCE LEVELS, OR EQUIVALENT PERMANENT, PHYSICAL EROSION REDUCTION METHODS HAVE BEEN EMPLOYED. WELD COUNTY SHERIFFS JOHN COOKE aa DEPARTMENT WELD COUNTY SHERIFF 5. THE PERMITTED LANDOWNER AND/OR CONTRACTOR MUST PERFORM INSPECTIONS OF ALL BMPS EVERY 14 DAYS AND ALSO AFTER ANY SIGNIFICANT STORM EVENT (RAIN OR SNOWMELT) THAT MAY CAUSE EROSION TO ENSURE THAT BMPS ARE FUNCTIONING PROPERLY. INSPECTION (970) 356-4000 OR 911 m LOGS MUST BE KEPT WITH THE SNP. ALL NECESSARY MAINTENANCE AND REPAIR SHALL BE COMPLETED IMMEDIATELY. a 6. ALL CONSTRUCTION PROJECTS, WHETHER THEY DISTURB LESS OR MORE THAN 1 (ONE) ACRE SHALL INSTALL, MAINTAIN AND REPAIR EROSION PLATTEVILLE-GILCREST 303 MAIN STREET a AND SEDIMENT CONTROL BEST MANAGEMENT PRACTICES (BMPS) ACCORDING TO THE STORMWATER MANAGEMENT PLAN (SWMP) AND/OR EROSION FIRE PROTECTION DISTRICT PLATTEVILLE, CO 80651 W CONTROL PLAN TO ASSURE CONTINUED PERFORMANCE OF THEIR INTENDED FUNCTION. EROSION & SEDIMENT CONTROL MEASURES (BMPS) MUST BE WCR 20 (970) 785-2232 OR 911 a INSTALLED PRIOR TO GRADING OR LAND DISTURBING ACTIVITIES. 7. LANDOWNERS AND/OR CONTRACTORS MUST ENSURE THAT VEHICLES DO NOT TRACK EARTH MATERIALS ONTO STREETS AND MUST IMMEDIATELY COLORADO OIL & GAS (303) 894- 2100 In REMOVE SUCH MATERIALS IF THIS OCCURS. EITHER SWEEPING BY HAND OR THE USE OF STREET SWEEPERS IS ACCEPTABLE. FLUSHING OFF PAVED CONSERVATION COMMISSION SURFACES WITH WATER IS PROHIBITED. x ci Lo 8. ALL LOADS OF CUT AND FILL MATERIAL IMPORTED TO OR EXPORTED FROM THE SITE SHALL BE PROPERLY COVERED TO PREVENT LOSS OF THE x MATERIAL DURING TRANSPORTATION ON PUBUC ROW. �t" c> ENVIRONMENTAL PROTECTION (303) 293-1788 c AGENCY REGION VIII (800) 277-8914 9. THE USE OF DIRT RAMPS IS PROHIBITED. A ROCK PAD ENTRANCE SHOULD BE INSTALLED WHERE CONSTRUCTION VEHICLES NEED TO ENTER OR cc EXIT FROM AN UNPAVED AREA INTO A PAVED ROAD. WCR 18 COOT GLORIA HICE-IDLER 10. LANDOWNERS AND/OR CONTRACTORS ARE RESPONSIBLE FOR CONTROLUNG WASTE SUCH AS DISCARDING BUILDING MATERIALS, CONCRETE TRUCK 1420 2ND STREET WASHOUT, CHEMICALS, LITTER AND SANITARY WASTE, AS APPLICABLE. GREELEY, COLORADO 80631 z (970) 350-2148 11. WASTE COLLECTION AREAS SHOULD BE LOCATED AWAY FROM THE STORM DRAINAGE SYSTEM. CONSIDERATION SHOULD BE GIVEN TO COVERING a WASTE STORAGE DUMPSTERS, TO BE ABLE TO CONTAIN WINDBLOWN MATERIALS. a_ v 12. THE DISCHARGE OF ANY WATER CONTAMINATED BY WASTE PRODUCTS FROM CUTTING OPERATIONS TO THE STORM ATMOS ENERGY JERRY ADAMS Cl) SEWER SYSTEM IS PROHIBITED. ALL STORM SEWER FACIUTIES ADJACENT TO ANY LOCATION WHERE PAVEMENT CUTTING P.O. BOX 1200 OPERATIONS INVOLVING ROAD/CONCRETE CUTTING NEED TO BE PROTECTED. ALL WASTE PRODUCTS GENERATED DURING CUTTING GREELEY, CO. 80631 x o ACTIVITIES MUST BE REMOVED ON A DAILY BASIS. (970) 304-2075 in La 13. WATER USE TO CLEAN CEMENT/CONCRETE TRUCKS SHALL BE DISCHARGED INTO A CONCRETE WASHOUT AREA (CWA). THE PREDEFINED WCR 16 cx CONTAINMENT AREA MUST BE IDENTIFIED WITH A SIGN, AND SHALL ALLOW THE LIQUIDS TO INFILTRATE, EVAPORATE OR DRY OUT. DRIED CONCRETE CENTURYLINK 12680 WCR 58 WASTE SHALL BE REMOVED AND PROPERLY DISPOSED OF. COMMUNICATIONS GREELEY COLORADO 80634 O 14. THE DISCHARGE OF SANITARY WASTE IN THE STORM SEWER SYSTEM IS PROHIBITED. PORTABLE TOILETS MUST BE PLACED ON PERMEABLE (970) 350-2941 __ SURFACES, AWAY FROM THE CURBSIDE AND AWAY FROM STORM INLETS AND/OR DRAINAGE WAYS. o 0 15. SPILL PREVENTION AND CONTAINMENT BMP'S FOR CONSTRUCTION MATERIALS, WASTE AND FUEL MUST BE PROVIDED. SPILLS THAT MAY REACH VICINITY MAP XCEL ENERGY TERRY STENCEL 0 THE STORM SEWER SYSTEM MUST BE REPORTED ACCORDING TO FEDERAL, STATE AND COUNTY REGULATIONS. 1500 6TH AVE in 1 "= 3000' GREELEY CO, 80631 W 16. STORM INLETS WITHIN AND/OR ADJACENT TO THE CONSTRUCTION SITE SHOULD BE PROTECTED. ANY PONDING OF STORMWATER AROUND INLET CONTACT Z PROTECTION MUST NOT CAUSE EXCESSIVE INCONVENIENCE OR DAMAGE TO ADJACENT AREAS OR STRUCTURES. CD co 17. RUNOFF FROM STOCKPILED AREA MUST BE CONTROLLED. SOILS THAT WILL BE STOCKPILED FOR MORE THAN 30 DAYS SHALL BE PROTECTED FROM WIND AND WATER EROSION WITHIN 14 DAYS OF STOCKPILE CONSTRUCTION (MULCH & SEEDING, EROSION CONTROL BLANKETS, ETC). ANY PROPERTY DESCRIPTION : I STOCKPILE LOCATED NEAR A DRAINAGE WAY, MUST BE PROVIDED WITH ADDITIONAL BMPS PROTECTION SUCH AS TEMPORARY DIKES OR SILT FENCE. (f) cc 18. NATURAL VEGETATION SHALL BE PRESERVED AND PROTECTED WHENEVER POSSIBLE. REMOVAL OR DISTURBANCE OF EXISTING VEGETATION SHALL LAND USE: COMMERCIAL/INDUSTRIAL I __ BE UMITED TO THE AREA REQUIRED FOR IMMEDIATE CONSTRUCTION OPERATIONS. DISTURBED AREAS THAT MAY NOT BE AT FINAL GRADE BUT WILL ZONING: AG A I ce REMAIN DORMANT (UNDISTURBED) FOR LONGER THAN 30 DAYS SHOULD BE STABIUZED WITHIN 14 DAYS. LEGAL: SUBDIVISION EXEMPTION NO. 0000- 00-0 $UBX15—OOXX Li Z a3 19. FUGITIVE DUST EMISSIONS RESULTING FROM GRADING ACTIVITIES AND/OR WIND SHALL BE CONTROLLED. 1�1 N CL 20. ALL TEMPORARY EROSION AND SEDIMENT CONTROL MEASURES SHALL BE REMOVED AFTER THE SITE HAS ACHIEVED FINAL STABIUZATION AND WA U 1= o THE PERMIT HAS BEEN INACTIVATED. THE STORMWATER VOLUME CAPACITY OF PONDS MUST BE RESTORED, AND STORM SEWER LINES AND/OR SOIL CLASSIFICATION : > w DRAINAGE INFRASTRUCTURE SHOULD BE CLEANED UPON COMPLETION OF PROJECT. N O 21 . CONDITIONS IN THE FIELD MAY WARRANT EROSION AND SEDIMENT CONTROL MEASURES IN ADDITION TO WHAT IS SHOWN ON THE SWAP AND/OR VALENT SAND, 0 TO 3 PERCENT SLOPES; 74.0% d EROSION CONTROL PLAN. THE LANDOWNER OR CONTRACTOR SHALL IMPLEMENT WHATEVER MEASURES ARE DETERMINED NECESSARY, AS DIRECTED H up BY THE COUNTY. VALENT SAND, 3 TO 9 PERCENT SLOPES; 12. 7% a/ U VONA LOAMY SAND, 0 TO 3 PERCENT SLOPES; 13.2% zo 22. ALL AREAS NOT LANDSCAPED OR COVERED BY OTHER PERMANENT SURFACES SHALL BE RESEEDED PER TABLE RV-10 GRASS SEEDING TABLES cNiBASED ON RANGE SITES FOR SANDY MEADOW AND SANDY PLAINS SITE CONDITIONS, AS CONTAINED IN WELD COUNTY CODE, CHAPTER 8, ARTICLE XI U if) w ,r, - STORM DRAINAGE CRITERIA, DIVISION I - GENERAL PROVISIONS, CHAPTER 12 - REVEGETATION. N 0 <Q \ N in W W „ U o U >-I- In 0 Z 0 O 0 Co 0 o J W CD CD PREPARED UNDER THE DIRECT SUPERVISION OF NH Cn C E PROJECT BENCHMARK: U, PROJECT BENCHMARK BASED ON NAVDBB DATUM o (VERTICAL ELEVATION.• 5024.03' co BENCHMARK: THE SOUTHEAST CORNER OF SECIJON 10, TOWNSHIP 2 NORTH, RANGE 66 WEST 6771 P.M. FOR AND EH BEHALF a BASELINE CORPORATION cu i c INIRAL SUBMITTAL 10/08/2015 r- DRANING SIZE 24" X 36" C D SURVEY ARM SURVEY BALE J EEC 10/2015 JOB NO. 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CONTOUR (5') . . • ' GRAVEL • cs PROJECT QUANTITIES• PROJECT OUANM7ES CONTINUED: 1 EDGE OF ASPHALT [ y ` w NATIVE SEED MIX SUBJECT PROPERTY LINE FOR AND a Sows Cr t DISTURBED AREA: 4.53 AC GRAVEL CLASS 5 BASE AREA: 3.44 AC - - EASEMENT DRAINAGE FLOW ARROW BASELINE OORPORA0ON <v CUT VOLUME.' 2,087 CY GMVEL CLASS 5 BASE IMPORT VOLUME (at 0.5' NO: 2, 779 CY SEDIMENT CONTROL LOG SCL INIRAL SUBMITTAL 10/08/2015 r- ALL VOLUME 7,480 CY T EXISTING UNDERGROUND TELEPHONE ;. ,, . ;:' DRANING SIZE 24" X 36" '") NET FILL VOLUME: 5,393 CY TOPSOIL REMOVAL AREA: 4.53 AC OMITS OF CONSTRUCTION PAVING LOC - - EXISTING RIGHT OF WAY ::.' : ;. .., .� SURVEY FIRM SURVEY BATE u TOPSOIL VOLUME (at 0.5' fill): 639 CY TOPSOIL REMOVAL VOLUME (at 0.5'cut): 3,657 CY EEC 10/2015 CLASS 5 BASE VOLUME (at 0.5' fill): £779 CY TOPSOIL BERM VOLUME. 3,018 CY VEHICLE TRACKING CONTROL VTC GAS GAS EXISTING GAS PIPELINE Joe NO. PL317 GRAPHIC SCALE `. - TOPSOIL LANDSCAPE VOLUME: 639 CY -x x x x- DRAMNG NAME TOTAL DIRT IMPORT/EXPORT VOLUME 1,975 CY TOTAL TOPSOIL EXPORT VOLUME 0 CY EXISTING CHAIN LINK FENCE 50 0 50 100 317 Certarus CNG CiviLdwg CONCRETE WASHOUT AREA CILIA o 0 0 0 PROPOSED CHAIN LINK FENCE I-I I-I I-I a Q SHEET 2 5 i — - - — - - — - - — - - — DRAINAGE BASIN BOUNDRY (IN FEET) 1 INCH = 50 FT C 2 CERTARUS LTD. limu__ __ ±_nr_ : -1 VEHICLE TRACKING CONTROL EROSION AND SEDIMENT CONTROL PLAN GENERAL NOTES: " o 0 USR15 0077 1 . THE DISTURBANCE AREA FOR THE PROJECT IS GREATER THAN ONE ACRE; THEREFORE, = o _ A STATE OF COLORADO CONSTRUCTION STORMWATER DISCHARGE PERMIT IS TO BE OBTAINED BY CONTRACTOR. c o - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - R/w - - - - - - - - - SOUTHEAST 1/4 OF SECTION 10, T2N, R66W, 6TH P.M., 2. THE CONTRACTOR IS RESPONSIBLE FOR IMPLEMENTING AND MAINTAINING EROSION AND 1 0- o _ r, COUNTY OF WELD, STATE OF COLORADO SEDIMENT CONTROL MEASURES AT M DURING CONSTRUCTION. STORMWATERLLI MANAGEMENT PLANS MAYBE MODIFIED WITH APPROPRIATE APPRO APPROVALS FROM THE •= o RI EROSION CONTROL DETAILS ENGINEER, AND MAY REQUIRE ADDITIONAL MEASURES AS FIELD CONDITIONS WARRANT. 3. A THOROUGH INSPECTION OF THE STORMWATER MANAGEMENT PLAN BEST MANAGEMENT Cr; I_ M Lu HARD SURFACED (Asphalt) PRACTICES (BMP'S) SHALL BE PERFORMED EVERY FOURTEEN (14) CALENDAR DAYS AND u..• EL AFTER ANY PRECIPITATION OR SNOWMELT EVENT. PERIODIC INSPECTIONS SHALL ALSO =- y • CC INCLUDE INSPECTING EQUIPMENT FOR LEAKS AND REVIEWING EQUIPMENT MAINTENANCE o co PUBLIC ROAD PRACTICE. ALL INSPECTIONS AND MAINTENANCE SHALL BE DOCUMENTED BY THE PROJECT o rn EROSION CONTROL SUPERVISOR AND MADE AVAILABLE TO THE ENGINEER UPON REQUEST. Fri L ANY EROSION CONTROL BMP'S THAT HAS BEEN COMPROMISED OR HAS BEEN DISTURBED o 15" CULVERT SHALL BE REPLACED OR RECONSTRUCTED. IT IS THE RESPONSIBILITY OF THE CONTRACTOR co & MINIMUM IF TO HAVE ALL EROSION CONTROL BMP'S IN PLACE AND EFFECTIVE PRIOR TO A STORM 45' - 60' J REQUIRED EVENT. RECYCLED ASPHALT RADIUS NOTES DITCH -� - FLOWLINE L EROSION LOGS SHALL BE EMBEDDED 2 INCHES INTO THE SOIL. 4. THE STORMWATER MANAGEMENT PLAN LOG BOOK SHALL BE UPDATED EVERY FOURTEEN A A 2. STAKES SHALL BE EACEODED TO A MINIMUM DEPTH OF t2 INCHES. (14) DAYS. THIS LOG SHALL REMAIN ON SITE AVAILABLE FOR REVIEW BY THE ENGINEER 3. EROSION LOGS SHALL BE TIGHTLY ABUTTED WITH NO GAPS. / - - - UPON REQUEST. MAINTENANCE ACTIVITIES TO CORRECT PROBLEMS NOTED DURING O USE TWO WOOD STAKES AT ALL I ° '/� INSPECTIONS MUST BE DOCUMENTED AND KEPT IN 1HE STORMWATER MANAGEMENT PLAN e g _ g L �� r /\\�/ EROSION LOG ENDS OR JOINTS .''- LOG BOOK. �r \ ` USE A STAKE EVERY 24" l J p C AND CONTINUE ALTERNATE / J n B �I 5. ALL CONSTRUC1ION SITE OPERATORS SHALL CONTROL WASTE SUCH AS DISCARDED N s 5 DOUBLE L. - �/ ORIENTATION THROUGHOUT B 1 O 1 CATTLE a I HE LENGTH OF THE EROSION LOG , •/ BUILDING MATERIALS, CONCRETE TRUCK WASHOUT, HAZARDOUS CHEMICALS (TO INCLUDE 9� � n�ser.® POINT B GUARDS - ��0 0 FLOC room BUT NOT LIMITED TO HEAVY EQUIPMENT MAINTENANCE FLUIDS, MOTOR OIL, ANTIFREEZE ' — //s EROSION LOG - - / MiM POINT A `� POINT A >- I m y o mom,. % l' AND VEHICLE FUEL), LITTER, AND SANITARY WASTE AT THE CONSTRUCTION SITE THAT MAY a r . � > % /, CAUSE ADVERSE IMPACTS TO STORMWATER QUAUTY. cc O i\/ o o mI �, EROSION LOG 6. ALL POTENTIAL POLLUTION SOURCES ON—SITE SHALL BE IDENTIFIED AND CONTROL o " MIN a PLAN VIEW ,,,r,,,•,,,��' J ` MEASURES INSTALLED AND PRACTICED TO MINIMIZE THE LIKELIHOOD OF A RELEASE. > RECYCLED ASPHALT I� / o/ J r PLAN VIEW 7. ALL PORTABLE TOILET FACILITIES SHALL BE LOCATED AWAY FROM GUTTERS, INLETS, W PLAN VIEW DITCHES, DRAINAGEWAYS, RECEIVING WATERS AND AREAS SUSCEPTIBLE TO FLOODING OR Q DAMAGE BY CONSTRUCTION EQUIPMENT. 0- 1 APP STAKES POINT A LU TO OXTMATELY POINT A d EACH 49 ° WETLANDS OR FEATURES FLOW POINT B 8. ALL PORTABLE TOILET FACILITIES SHALL BE SECURED IN PLACE BY STAKES INTO THE (TYP TN; REQUIRING PROTECTION FLOW r" `� ow �� I, �� GROUND TO PREVENT TIPPING. NOTE: 12" COVER OVER CULVERT \� / , , , + N /` ` ` ` r44e� :' 11 \�O/AO / T/'' //i i/!i .✓ 9. STOCKPILES INCLUDING LANDSCAPING MATERIALS EARTH MATERIALS AND DIRT FROM OR PER MANUFACTURER GRAVEL • . ��/ INLET . .e !i ,i ✓_ POINTS A SHALL BE HIGHER THAN POINT B. GRADING OR EXCAVATION SHALL NOT BE LOCATED ADJACENT TO WATERWAYS. RECOMMENDATIONS. /x/k//, /\ / / / /4 / / // / , 100' RECYCLED ASPHALT WITH ` -`''''.. ,/, ,a ,,, i,,� I : • ELEVATION 10. ALL MATERIAL IMPORTED TO OR EXPORTED FROM THE SITE SHALL BE PROPERLY DOUBLE CATTLE GUARDS . SECTION B B EROSION LOG DITCH INSTALLATION SECTION A-A COVERED TO PREVENT THE LOSS OF MATERIAL DURING TRANSPORT. HAUL ROUTES MUST NOTE: LOCATE EROSION LOGS AT THE OUTSIDE BE PRE-APPROVED BY THE COUNTY. NO MATERIAL SHALL BE TRANSPORTED TO ANOTHER TYPICAL STAKE INSTALLATION EDGE OF THE CONCRETE APRON. SITE WITHOUT FIRST OBTAINING A HAUUNG PERMIT FROM THE COUNTY. f `+�, WELD COUNTY EROSION LOG FILTER AT DROP INLET ifet V\ AIR WORKS DEPARTMENT PREFERRED OPTIONS EROSION LOG APPLICATIONSVLiDc. SCALE Fa NOT TO SCALE COLORADO DATE' AUGUST 2011 SHEET: 1 of 3 Computer File Information Sheet Revisions W Colorado Department nofs Transportation TEMPORARY STANDARD PLAN NO. Q Creation Date: 07/04/12 Initials: DD Dote: Comments tma 4201 East Arkansas Avenue Last Modification Date: 07/04/12 Initials: LTA (a -- Phone: (3003r 5,_908322 M-208-1 PERFORMANCE STANDARD NOTES: z FaII PaLh:www.aoloradodot.info/baalness/deaignaapport (R-X, ---- _ EROSION CONTROL o @�R„Tp1 Fox: (303) ]5]-9820 Drawing File Name: 2080102012.tlgn Ca In CAD Ver.: MicroStafian VB Scale: Nat to Scale Units: English CTS Project Development Branch DD/LTA Issued By: Project Development Branch on July 4, 2012 Sheet No. 2 of 12 1 . TEMPORARY EROSION CONTROL FACILITIES AND OPERATION PERMANENT FACILITIES INTENDED TO > CONTROL EROSION OF AN EARTH DISTURBANCE OPERATION SHALL BE INSTALLED BEFORE W 1 PERMANENT VEHICLE TRACKING CONTROL (VTC) ANY EARTH DISTURBANCE OPERATIONS TAKE PLACE. C2 C3 NOT TO SCALE 2. EARTH DISTURBANCES SHALL BE CONDUCTED IN SUCH A MANNER SO AS TO o EFFECTIVELY REDUCE ACCELERATED SOIL EROSION AND RESULTING SEDIMENTATION. __ 4 EROSION LOG DETAIL 1 of 2 0 3. PERSONS ENGAGED IN EARTH DISTURBANCES SHALL DESIGN, IMPLEMENT, AND MAINTAIN o 6" CLASS 5 ROAD BASE COMPACTED TO 95% DENSITY C2 I C3 ACCEPTABLE SOIL EROSION AND SEDIMENTATION CONTROL MEASURES, IN CONFORMANCE c I WITH THE EROSION CONTROL TECHNICAL STANDARDS ADOPTED BY WELD COUNTY. (j 4. EARTH DISTURBANCES SHALL BE DESIGNED, CONSTRUCTED AND COMPLETED IN SUCH A Z 3 MANNER SO THAT THE EXPOSED AREA OF ANY DISTURBED LAND SHALL BE LIMITED TO o Z THE SHORTEST POSSIBLE PERIOD OF TIME. LEI 5. SEDIMENT CAUSED BY ACCELERATED SOIL EROSION SHALL BE REMOVED FROM RUNOFF Q WATER BEFORE IT LEAVES THE SITE OF THE EARTH DISTURBANCE. C/) oc EROSION LOGS SHAD, �•� 6. ANY TEMPORARY OR PERMANENT FACILITY DESIGNED AND CONSTRUCTED FOR THE _I 1 \ \ \ \\ 1 \ \ \ \\ 1 \ \ \\ WITH NO GAPS(TYP.)BE TIGHTLY ABUTTED � CONVEYANCE OF WATER AROUND, THROUGH, OR FROM THE EARTH DISTURBANCE AREA Q J 0 J SHALL BE DESIGNED TO LIMIT THE WATER FLOW TO A NON-EROSIVE VELOCITY. t..j is_ Q SCARIFY MIN. Bw OF SUBGRADE, ADJUSTED IN MOISTURE CONTENT ) AS NEEDED AND COMPACT TO 95% DENSITY PRIOR TO PLACEMENT B 7. RECORDS OF SPILLS, LEAKS, OR OVERFLOWS THAT RESULT IN THE DISCHARGE OF �"� CD o OF ROAD BASE y B ` � �� POLLUTANTS MUST BE DOCUMENTED AND MAINTAINED. SOME SPILLS MAY NEED TO BE Ca Z = J t ��- REPORTED TO THE DIVISION IMMEDIATELY: SPECIFICALLY, A RELEASE OF ANY CHEMICAL, CD tr1 0 C v °� � OIL, PETROLEUM PRODUCT, SEWAGE, ETC., WHICH MAY ENTER WATERS OF THE STATE, PA Z I- � - MUST BE REPORTED. MORE GUIDANCE IS AVAILABLE ON THE WEB AT N o =O 2 CLASS 5 BASE y �i WWW.CDPHE.STATE.CO.US/EMP/SPILLSANDRELEASED.HTM. THE DIVISION'S TOLL FREE N i- ci EL C2 C3 CROSS SECTION � , �. ov W�l' 24-HOUR ENVIRONMENTAL EMERGENCY SPILL REPORTING UNE IS 1 .877.518.5608. ALSO E'I IMMEDIATELY CALL THE ENGINEER - TODD RAND AT 970.353.7600 AND WELD COUNTY - _O JOSH HOLBROOK AT 970.301 .2622. Ig c zo 0 CONCRETE WASHOUT ,� U L'"I A) SIG" ISOMETRIC VIEW PLAN VIEW EROSION LUG BMP MAINTENANCE NOTES: N o ✓✓ s~.x�.. �/ . ✓ ° �. 1 . IT IS ANTICIPATED THAT THE BMP'S IMPLEMENTED AT THE SITE IMLL HAVE TO BE ' LOW o / MODIFIED TO ADAPT TO CHANGING CONDITIONS OR TO ENSURE THAT POTENTIALENI Q \ N :1 a MIN. " \ � STAKES _ � POLLUTANTS ARE BEING PROPERLY MANAGED AT THE SITE. WHEN BMP'S ARE MODIFIED vR ,. +' .» . \ \J /' APPROXIMATELY 90° , ' I- ,4 = t ) /////\//k LON TO EACH OTHER THE SWMP MUST BE MODIFIED TO ACCURATELY REFLECT THE ACTUAL FIELD CONDITIONS. (/7 O1 .4; T' Jo: Y k.- "Ya - ' �� , / RYPJTh. S f.TIfIN R-R I--I-i W ` + e e " G + l: VEHICLE TRACKING \ r \� 2. THE OWNER/CONTRACTOR SHALL CONTINUOUSLY MAINTAIN ALL SILT FENCING SO THAT O F Y 3:1 8 X 8 MIN. 3:1 e - . - " l "M i CONTROL (SEE /> / � � V . N9 EROSION LOG CULVERT INLET PROTECTION :11r/ � IT FUNCTIONS PROPERLY DURING CONSTRUCTION AND WORK SUSPENSIONS. ALL SILT 1?C DETAIL) OR /,`ice /. E FENCING SHALL BE REMOVED BY THE CONTRACTOR UPON SUBSTANTIAL PERMANENT > o v 1 ' OTHER STABLE � y\✓ \/\ \\// //\� /<\, J I In `' SURFACE STABIUZATION UNLESS OTHERWISE DIRECTED BY THE ENGINEER. CI cn / 3: 1 .,:iii-el 4.74k- a-- 4.,; -.ft, '.*� ff igi. : 5' TO10' 3. ALL INLET/OUTLET PROTECTIONS WILL BE CHECKED FOR MAINTENANCE AND FAILURE. Ov w , . SEDIMENT SHALL BE REMOVED AND PROPERLY DISPOSED OF ONCE IT HAS ACCUMULATED o SECTION A-A TO HALF THE DESIGN OF THE TRAP. w C) - I- 25 MIN. M NOTES: _ EROSION LOGS USED Al TOE O SLOPE SHALL BE PLACED 5 TO 10FEET ,- -- 4. ALL SPILLS SHALL BE CLEANED UP IMMEDIATELY AFTER DISCOVERY, OR CONTAINED PREPARED UNDER THE DRECT CONCRETE WASHOUT AREA PLAN BEYOND TOE OF SLOPE TO OF SHAE CAPACITY.PLACED •.�, j 12" TYP. 1 COMPACTED BERM AROUND 2. EROSION LOGS SHAH BE PLACED ON TIE CONTOUR WITH ENDS FLARED FLOW Ad- UNTIL APPROPRIATE CLEANUP METHODS CAN BE EMPLOYED. MANUFACTURE'S SUPERVISION OF >4 THE PERIMETER IP SLOPE. - �� RECOMMENDED METHODS FOR SPILL CLEANUP SHALL BE FOLLOWED, ALONG WITH PROPER cHn 11 2% SLOPE EROSION LOG TOE OF SLOPE PROTECTION /° DISPOSAL METHODS. E • L I1 13' MIN. UNDISTURBED OR 1 k3 >3 I V) COMPACTED SOIL VEHILE8 X 8 MN. I CONTROL (SEEKVfc — EROSION LOG APPLICATIONS EROSION LOG CULVERT OUTLET PROTECTION I SECTION A DETAIL J Computer File Information Sheet Revisions Colorado Department Transportation STANDARD PLAN NO. m ' Creation Date; O]/04/l2 Initials: OD Date: Comments � 4201 East Arkansas TEMPORARY as Avenue CWA- 1 CONCRETE WASHOUT AREA Last Modification Date: 07/04/12 Initials: LTAGED .C +yya Denver, Colorado 80222 EROSION CONTROL O O FuIlPoth:www.coloradodotinfo/business/designsupport (R-X) M-208 Phone: (303) 757-9083 -1 FOR MID CM BEHALF CF .� Fox: (303) 757-9820 i Drawing File Name: 2 0 8 010 3 012.dgn o 3 BASELINE GDRPGRATION (Gj CAD Vee Nicro5tafian VB Sale: Not to Scale Units: E,gfsh (R-X) Project Development Branch DD/LTA Issued By: Project Development Branch on July 4, 2012 Sheet No. of 12 INITIAL SUBMITTAL 10/06/2015 3 CONCRETE WASHOUT AREA DRAxING SIZE 24" X 36" J cl) C IN �1 8 RVEY FIRM 109LIMY/2015DATE C •IDB NO. PL317 NOTES: 5 EROSION LOG DETAIL 2 OF 2 DRAwnG NAME 2 C2 C3 317 Certarus CNG CiviLdwg Q 1 . LOCATION TO BE DETERMINED BY CONTRACTOR SHEET 3 cc 4 EL C3 CERTARUS LTD. _ USR15-0077 =-===== CO CLI a o SOUTHEAST 1/4 OF SECTION 10, T2N, R66W, 6TH P.M., o i COUNTY OF WELD, STATE OF COLORADO c W DRAINAGE DETAILS = g I U W M LLJ usiisl co • cc co CD c7) u- W h o) O CO TRASH RACK, LCCKABLE G A\D REMOVABLE TOP OF 3ERM ELEV = 5000.95 • V100-yr = 4999. 93 a j SPILLWAY ELEV = 4239 -1.- t 0- yr GRATE = 4999.33 • 4, 8" NIDE CONC._11. B e L CD i C� 8S 3 • CUTOFF WALL ' i'r m WQCV ELEV = 4799.11 f �$ I$ d U .S. Filter Stainless Steel Nell—Screen* o 5' . - 5' 18. 0 5' 5' (or equal) w 73. 3 LF of 15" CMP @ 0.65°1. o 4.0' - IS \- STEEL RESTRICTOR PLATE EROSIO\ CO\TROL ter -ILI _ 100-YP TOP OF BERM ELEV= 5000.93 1 ' ELANPET AT SIDE SLOPES A9GHCL NV = 499 - .00 5000 m r —I — -F i FINISH GRADE _ _ _ _ 3OTTOM ELEV = 4998. 4 a NV. =• • . .. . . •. . !' WS La I I I I SPILLWAY ELEV= 4999.93 ________________<1- - - T - - T I I I - INV. = 4 '_ .a --r � � W I I I I I I I I I I I I I I I I I I s" CONCRLIE BOTTOM Standard structural � � TYPE L RIPPAP I I I I I I I I I I I I Steel Channel Formed m Section A—A L _ _ L _ _ L _ _ L _ _ L _ _ _ _ _ _ _ _ _ � _ _ _ L _ _ L _ _ 1 Into Concrete 3ottom STEEL RESTRICTOR PLATE �� I I I I I I I I I I I I I I I I I And Sides Of 6" wide Well—Screen Frame0 (.."...: 0 I I I I I I I I I I I I I I I I I I concrete opening . Attached To Channel _ Trash Rack Attached 3y Intermittent Nelds 1...--I 1 - - 1 - - 1 - - 1 - - 1 - - I - - I - - � - - _L - _1 - - _1 - - _1 - f _1 - - _I _I - - 1 - - _I - - 1. Sy Intermittent Welds. #4 REINF. @ 18" O.C. 1.----71- CENTRALLY PLACED / . �� 16." CMP Restrictor Plate Add Hot Dipped Galvanized Steel Perforated Water Quality Flow Control Hate. Seal all Edges with a Gasket or Silicone Caulk deada 6" CO\C. 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Filter* 4 444. : , or Equal) Nires J Q J Er o t o rE� t,t L1 z 30TTOM HOLE = 4998. 40 1 • • • • , 1�1 U N in a I I • ` . • � � :: 3OTTOM 3'0X = 4998. 15 0.139'-I- 1 ••:Tc • -.• 0.090" CL I-= Section D-D Section C-C S N Ni— z_ o_ o cz Q o ISi U o N .....1:4 o F ( w 5 = N N 2 OUTLET STRUCTURE Q C2 C4 ~ I— in Os w U � r o ti CI LLI v r PREPARED UNDER THE DIRECT SUPERVISION OF ND c I I 0 ELI- I cii U CO o FOR AND ON BEHALF Cr BASELINE CORPORATION cai INIRAL SUBMITTAL 10/08/2015 r DRANING SIZE 24" X 36" _ r / SURVEY ARM SURVEY BALE J EEC 10/2015 KM NO. 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' .:.: X T X X Xr X X XX \— X X X X X X-c — 11 — X X 'X m W '� • �' _ — _ X X X \ X X-�t-�X - .1L-Tc"- - - - O % ` X T \ �- - T - T T T - - T T ` - - � — ai T Try r- — rr7 - - - - - - - - - - . . . . . . . . . . . . 65 -1-re - - ₹— — - — — - / - - - - - ' PREP SUPERVISION OF ECT - - - - �r / PREPARED UNDER THE DBt.....ms. alTr.... —.m7' 6/ I ---- — — --F- - - - - - - - - - - - - - - - - - - - - 5005 _ - -r - - - - - _ _ $ - - T - - - T - _ — ?_ - - ' 6.00' S 89'17'25" W / A \ S 89'17'24" W 973.34' / / I JI COUNTY ROAD 22 / 1 \ 1 v v - - - - FOR AND ON BEHM OF cu BASELINE OORPORAl10N c� INIRAL SUBMITTAL 10/08/2015 RUNOFF SUNNARY DRANINGSIZE 24' X36' SURVEY FIRM SURVEY BALE BASIN AREA 10 - YR 100 - YR 40 OGRAPHIC SCALE 80 HECJOB NO. PL317 C SURVEY 10/2015 HISTORIC 3 . 31 ACRES 0 . 90 CFS 4. 53 CFS II II EL (IN FEET) JTRAVANG NAME 3 NO.Cer NG CiviLdwg DEVELOPED 3 . 31 ACRES 3 . 92 CFS 8 . 25 CFS 1 INCH = 40 FT SHEET 5 OF 5 C5 Appendix C - Inspection Form (s) APPENDIX H PREPARING YOUR STORMWATER CONTROL 0 & M PLAN ATTACIIMEN'I` 4 ANNUAL INSPECTION REPORT FORMAT 1. General A. Date and time of site visit B. Reason for inspection (e.g., routine/annual, follow-up, by City request, or response to complaint) C. Weather/rainfall D. Personnel participating E. Ability to obtain access to the site II. Review of Stormwatcr Control Operation and Maintenance Plan A. Ability to obtain and review on-site copy of plan B. Date of last update to plan C. Sections out-of-date and updates needed 1 . Contact information for site personnel 2. Information on BMPs 3. Records of previous inspections D. Review of maintenance logs 1 . Comparison to maintenance schedule. Note exceptions. III. Results of Site Inspection A. Overall condition of site and any exceptional circumstances (e.g., construction in progress, flooding) B. For each BMP listed in the Stormwater Control Operation and Maintenance Plan 1. Items inspected 2. Exceptions noted 3. Corrective actions needed a. Exceptions not affecting BMP performance (correct and re-inspect in one year) b. Exceptions affecting BMP performance (correct and re-inspect immediately) IV. Compliance Status A. In compliance—no corrective actions required, or B. In compliance—implement corrective actions and re-inspect in one year, or C. Not in compliance—implement corrective actions and re-inspect V. Summary and Recommendations A. Note any required follow-up and schedule re-inspection if necessary 11-19 Appendix D - Maintenance Form (s) Ni. 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C c3— 1 .� n n C 4 u O It b c a Y E, 4 C t ccS ice-+ n 0. 0 n U cn ^ p O r G cco r X O (.1 cn 'LJ II_"� cC It o LL, f Appendix E - Stormwater Facility Maintenance Notification Form APPENDIX H PREPARING YOUR STORMWATER CONTROL 0 & M PLAN ATTACHMENT 2 CONTACT INFORMATION FORM Designation of Individuals Responsible for Stormwater Treatment BIM Operation and Maintenance Date Completed Facility Name Facility Address Designated Contact for Operation and Maintenance Name: Title or Position: Telephone: Alternate Telephone: Email: Off-Flours or Emergency Contact Name: Title or Position: Telephone: Alternate 'Telephone: Email: Corporate Officer (authorized to execute contracts with the City) Name: Tide or Position: Address: Telephone: Alternate Telephone: Email: H-15 PREPARED FOR : CERTARUS LTD . USR1515-0077 LOCATED IN A PORTION OF THE SE % OF SECTION 10, TOWNSHIP 2N, RANGE 66W OF THE 6TH P . M ., COUNTY OF WELD, STATE OF COLORADO DRAINAGE REPORT PREPARED BY : BASELINE ENGINEERING CORPORATION 710 11TH AVE., STE. 105 GREELEY, COLORADO 80631 February 15, 2016 JOB # PL317 CERTARUS VBASELINE En ineerin r_PIa ping ; ying_ Vicinity Map -!, er i y� � v~ PROJECT ` '\1 I LOCATION _ _ _ r, , a _ _ au p se= k a �'„ tlaSS . _- =, Ia WCR 22 -- __ - - _ a -- --.'.--.' ''__ I hereby certify that this report for the drainage design of Cetarus Ltd . was prepared by me (or under my direct supervision) in accordance with the provisions of the Weld County storm drainage criteria for the owners thereof. M llllt� l.. aooLac _ & S . "44/:,,..:•% . °la" 2 -IS -J W1 . 1 . - w • O ' •/,+� Z S, , .•••' roar , `9 NAL •,, if r• /APE' Noah J Nemmers, P. E. State of Colorado No. 39820 Case Name: Case Number: Date: Weld County Public Works Use by Special Review ( USR) and Site Plan Review (SPR) Drainage Report Outline The following checklist is to be utilized as guidance, and may not be all inclusive. Other concerns not included in this checklist may arise during the review process. NOTE: A HARDCOPY OF THE DRAINAGE REPORT AND CONSTRUCTION DRAWINGS MUST BE SUBMITTED TO PUBLIC WORKS FOR REVIEW. Comment Headings Included Not N/A Included All reports shall be typed on 8-1 /2" x 11 " paper and bound. Drawings (24" x 36") shall be included. The drawings shall be bound within the report or included within a pocket attached inside the back cover of the report. The report shall be a stand-alone document and therefore all important reference material, supporting documents, and calculations shall be copied and included within the report appendix. The report shall include a cover letter presenting the drainage design for review and shall be prepared or supervised by an engineer licensed in Colorado. Only original documents sealed in ink will be accepted. The sealed report shall contain a certification sheet as follows: "I hereby certify that this report for the drainage design of (Insert Name of Project) was prepared by me (or under my direct supervision) in accordance with the provisions of the Weld County storm drainage X criteria for the owners thereof." The Drainage Report is stamped, signed, and dated by a registered P.E. licensed to practice in the State of Colorado. X • All submitted construction plan sheets are stamped, signed, and dated by a registered P.E. licensed to practice in the State of Colorado. X The following items at a minimum should be discussed in the Drainage Report narrative and should be supported with maps and calculations in the Appendix. Include a copy of this checklist with the Drainage Report submittal. I. General Location and Description X A. Location X 1 . Township, Range, Section , '/n-Section. X 2. Local streets within and adjacent to the development. X 3 Major open channels, lakes, streams, irrigation and other water resource facilities within and adjacent to proposed project site. X 4 Names of surrounding developments including jurisdiction municipalities). X B. Description of Property X 1 . Area in acres. X 2. Ground cover and soil types. X 3. Major open channels and property ownership. X 4. General project description . X Page 1 of 5 M:\PLANNING\Kris\Procedural Guides\USR-SPR Drainage Report Checklist 6-15-12.docx Case Name: Case Number: Date: 5 Irrigation facilities and facility ownership information within 200 ft. of property. X • 6. Groundwater characteristics (where applicable). X II. Drainage Basins and Sub-Basins X A. Major Basin Description X 1 . Reference to Weld County Master Drainage Plan(s) where applicable. X 2. Major basin drainage characteristics. X 3. Identification of all FEMA-defined 100-year floodplains and floodways X affecting the property. On-site & offsite contours at minimum 2-ft vertical intervals are to be 4. included on the Drainage Report drawings. X B. Sub-Basin Description X 1 Historic drainage patterns on the subject property and adjacent X properties. Off-site drainage flow patterns and impacts on the subject property 2. (minimum 200 ft outside property boundary, or until no further off-site X contributing flow area is encountered). III. Drainage Design Criteria X i A. Development Criteria Reference and Constraints X Discussion of previous drainage studies (i.e. project master plans) for the 1 . subject property that influence or are influenced by the proposed drainage design for the site. X Discussion of site constraints such as slopes, streets, utilities, existing 2. structures, irrigation ditches, and the site plan impacts on the proposed drainage plan. X B. Hydrological Criteria X 1 Identify design rainfall amounts and source of design storm depth information, NOAA Atlas, UD&FCD maps, etc. X 2 Identify design storm recurrence intervals. Reference the appropriate information in the Appendix. X i Identify runoff calculation method(s) and any computer models. Include 3 summaries of the routing and accumulation of flows at all identified design points for minor and major storm runoff. Reference the results in the Appendix. X 4 Identify detention discharge and storage calculation methods and computer models. Reference the results in the Appendix. X 5 Discuss of off-site flows will be routed around the proposed site or over the spillway for the 100-yr developed condition. X C. Hydraulic Criteria X Identify conveyance capacities from County references and any computer 1 . x models. Identify detention outlet type. Include a summary of the 100-year water 2 surface elevation , spillway/overflow facility. Reference the appendix for the calculations. Include summaries of the detention storage sizing and X provide a stage-storage table/curve identifying water quality storage, 100- Page 2 of 5 M:\PLANNING\Kris\Procedural Guides\USR-SPR Drainage Report Checklist 6-15-12.doCX Case Name: Case Number: Date: yr detention pond storage, and 1 ft of freeboard. Reference the calculations in the Appendix. X 3 Identify water quality outlet configuration. Reference the calculations in the Appendix. X 4 Identify culverts including diameter, type, and slope. Reference the calculations in the Appendix. X Identify storm sewer inlets, manholes, etc. Reference the calculations in 5 the Appendix. X 6. Discussion of permanent erosion control features. X Discussion and justification of criteria or calculation methods (for water 7. quality, check dams, drop structures, rundowns, etc.) used that are not X presented in Weld County CODE. IV. Drainage Facility Design X A. General Concept X 1 . Discussion of concept and typical on-site drainage patterns. X Discussion of compliance with off-site runoff considerations and 2. constraints. X 3. Discussion of the content of all tables, charts, figures, or drawings in the report. X 4 Discussion of anticipated hydraulic structures (channels, pipes, X rundowns, etc. ). B. Specific Details • 1 Discussion of maintenance access and aspects of the design. Include a X maintenance plan. 2 Provide copies of CDPHE, CAFO, DRMS, or State Engineer's permit X applications where applicable. V. Conclusions A. Compliance with the Weld County CODE X 1 . Statement of whether or not the design will meet Weld County Code. X B. Drainage concept X 1 Effectiveness of drainage design to control damage from storm runoff. X Influence of proposed development on any applicable Weld County 2. Master Drainage Plan recommendations. X Identification of and intent to obtain written approval of affected irrigation 3 company or other property owner(s). Weld County may require that the applicant provide evidence that offsite impacted jurisdictions have been notified of the proposed plans. X 4 Reference all criteria and technical resources utilized. X The Appendices should include at a minimum the following information. The Drainage Report should be a standalone document and needs to include copies of all pertinent references used in the generation of the Drainage Report. VI. Appendices X A. Hydrologic Computations X Page 3 of 5 M:\PLANNING\Kris\Procedural Guides\USR-SPR Drainage Report Checklist 6-15-12.d0CX Case Name: Case Number: Date: 1 Vicinity Map showing location of the site in relation to surrounding area. X Show the approximate boundaries of the site. 2 FIRMette showing location of the site in relation to the FEMA mapped X floodplains/floodways. Show the approximate boundaries of the site. 3. Soil Survey Information/Map showing soil types and soil hydrologic groups for the project site. X Rainfall Maps with the project location identified. Maps can be from 4" UDFCD or NOAA as applicable. X 5. Land use assumptions regarding adjacent properties. X 6 Initial and major storm runoff computations at specific design points. (5- yr, 10-yr, and 100-yr) X 7. Historic and fully developed runoff computations at specific design points. X 8 Computer model input and output. Include model files and/or spreadsheets on a CD-ROM to be attached to the Drainage Report. X B. Hydraulic Computations X Culvert sizing. Provide computations showing slope, pipe size, material, 1 . invert elevations, 100-year energy grade line (EGL1oo), and hydraulic X profile. 2. Storm inlet sizing. X 3 Swale or channel sizing. The calculations need to show stability calculations for unvegetated and vegetated conditions. X 4 Riprap or other revetment design. The calculations need to include design for bedding and geo-fabric. X 5 Pond area/volume capacity and outlet sizing . Show calculations for the X 100-year water surface elevations and overflow facilities. 6. Orifice plate, spillway, and pond outlet sizing. X 7. Include computations for permanent erosion control features. X 8 Any computer model input and output. Include model files and/or s readsheets on a CD-ROM to be attached to the Drainage Report. X C. 24 x 36 Maps X Historic Drainage Basin Map. Show drainage basin boundaries (on-site 1 . and off-site), 2 ft on-site and off-site drainage boundaries, design points, X historic flow path, flow path length, and flow path slope. Fully Developed Drainage Basin Map. Show drainage basin boundaries (on-site and off-site), 2 ft on-site and off-site drainage boundaries, design 2 points, developed flow path, flow path length , and flow path slope. Show drainage easement including metes and bounds description around all drainage related features. Show any other drainage easements that may X exist on the project site. Construction Drawings showing location, sizing, and details for all storm 3. sewers, open channels, culverts, cross-pans, and other appurtenances. X Include cross sections of swales and open channels. Construction Drawings showing location of detention facilities and outlet 4. works. Include the 100-year water surface elevations, overflow facilities, X and labels for pond volume and discharge. Grading Plan showing existing and proposed contours. Identify the 5 lowest opening elevation of buildings showing that they are above the 100-year water surface elevations of channels, swales, streets, ponds, or X other drainage facilities. Erosion and Sediment Control Plan showing all BMPs to be utilized on- 6. site. Include typical installation details, installation notes, and maintenance notes for all BMPs to be utilized on the project site. X Page 4 of 5 M:\PLANNING\Kris\Procedural Guides\USR-SPR Drainage Report Checklist 6-15-12.d0CX Case Name: Case Number: Date: 7 Detail sheets for pond outlet, orifice plate, trash rack, spillway X configuration, riprap, culverts, channels, etc. All culverts are to be identified and profiled in the Construction Drawings 8. with slope, pipe size, material, invert elevations, 100-year energy grade X line (EGL,00; , and hydraulic profile. On all Construction Drawings show the location of all existing and 9. • roposed utilities and identify the utility as existing or proposed. X 10. The elevations of manhole and inlet inverts are identified and profiled. X 11 . Miscellaneous hydraulic structures/features are shown on the X Construction Drawings. Page 5 of 5 M:\PLANNING\Kris\Procedural Guides\USR-SPR Drainage Report Checklist 6-15-12.doCX INDEX ITEM PAGE GENERAL LOCATION & DESCRIPTION 1 DRAINAGE BASINS & SUB-BASINS 2 DRAINAGE DESIGN CRITERIA 3 DRAINAGE FACILITY DESIGN 6 CONCLUSIONS 8 REFERENCES 8 ATTACHMENTS Attachment 1 : NRCS Soils Map Attachment 2 : FEMA Map Attachment 3 : Standard Form SF-1 (Composite "C" Factors) Attachment 4: Standard Form SF-2 (Time of Concentration ) Attachment 5 : Standard Form SF-3 (Storm Drainage System Design ) Attachment 6: Detention Pond Design Calculations Attachment 7: Culvert and Pond Outlet Pipe Calculations Attachment 8: Point Precipitation Frequency Estimates Attachment 9 : Proposed Grading & Drainage Plan CERTARUS LTD. WELD COUNTY USE BY SEPCIAL REVIEW ( USR) DRAINAGE REPORT I GENERAL LOCATION AND DESCRIPTION A. LOCATION 1 . Township, Range, Section, 1/4 Section : The subject property is located in the southeast 1/4 of Section 10, Township 2 North, Range 66 West of the 6th P. M ., Weld County, Colorado. Site Plans are included for reference in Attachment 7 . 2 . Local streets within and adjacent to the development: Weld County Road 22 is adjacent to the site on the south . 3 . Major open channels, lakes, streams, irrigation and other water resource facilities within and adjacent to proposed project site: There are no water resource facilities within or adjacent to the proposed project site. 4. Names of surrounding developments including jurisdiction (municipalities) : There is an EnCana Oil & Gas facility to the east of the project and an Anadarko Petroleum Corporation facility east of the project, directly south of the EnCana facility. Neither facility is adjacent to the proposed project site. B. DESCRIPTION OF PROPERTY 1. Area in Acres: Property Area = 10.008 Acres. Approximate Total Project Area ( Disturbance Limits) = 4.53 Acres. The Approximate Total Project Developed Area (Surfaced Area ) = 3.31 Acres. 2 . Ground cover and soil types: According to the Natural Resources Conservation Service ( MRCS) Soils Survey in Attachment 1, the project area consists of three main soil types. The soils in the site are well drained and Hydrologic Soil Type A. Calculations for composite "C" factors are included in Attachment 3 . Hydrologic soil type A was used for these calculations. 3 . Major Open Channels and Property Ownership: There is no major open channel adjacent or near to the project site. The site layout and grading plan, Sheet C2, and the drainage plan, Sheet C5, are shown in Attachment 8. The property is owned by Cannon Land Co. and is identified by the Weld County Assessor's Office as Parcel Number 130910000006. 1 4. General Project Description : The existing zoning for the property is Agricultural . No changes to zoning are proposed . Certarus Ltd . intends to use the subject portion of the parcel, composed primarily of gravel, as a production area for Compressed Natural Gas (CNG ) and staging area for semitrailers. The intent is for the existing topography on the site to remain with only minor grading proposed for the site area improvements. 5 . Irrigation facilities and facility ownership information within 200 ft. of property: There are no irrigation facilities within the site or within 200 feet of the site. 6. Groundwater characteristics (where applicable): The NRCS soils report states the soils are well drained with depth to water table exceeding 80 inches. II DRAINAGE BASINS AND SUB-BASINS A. MAJOR BASIN DESCRIPTION 1 . Reference to Weld County Master Drainage Plan(s) where applicable: There are no known Weld County Master Drainage Plans for the project site. 2 . Major basin drainage characteristics: There are no known details of the drainage basin characteristics of the project site defined by a Master Drainage Plan on record . 3 . Identification of all FEMA-defined 100-year floodplains and floodways affecting the property: The FEMA Flood Map Service Center lists no flood map for this area . Attachment 2 . 4. On-site & offsite contours at minimum 2-ft vertical intervals are to be included on the Drainage Report Drawings: Topography at the project site has been provided from a recent engineering survey. Contours are labeled accordingly on the Site Plans provided in Attachment 8. B. SUB-BASIN DESCRIPTION 1 . Historic Drainage patterns on the subject property and adjacent properties: The subject property is located in rural Weld County and is covered with native vegetation . There are several oil and gas wells in the vicinity. The drainage area for subject portion of the property is designated as Basin H1 and is 3.31 acres. This basin slopes generally to the west at approximately 1 .5% to 3 .5%. WCR 22 comprises the south basin boundary. Currently stormwater runoff flows west in its historic pattern . Approximately 4.53 acres of this basin is proposed to be developed with a detention pond and gravel surfaced area for CNG production 2 and semi tractor-trailers. The remainder of the basin will remain unchanged . The total, property area, basin imperviousness as a result of the proposed improvements is approximately 17%, the developed site area imperviousness as a result of the proposed improvements is approximately 41%. The increase in runoff from these basin improvements will be detained within a detention pond . 2. Off-site drainage flow patterns and impacts on the subject property (minimum 200 ft outside property boundary or until no further off-site contributing flow area is encountered ): There is no significant off-site drainage flow entering the property that requires routing through the property. A shallow swale adjacent to the east boundary is proposed to route offsite flows around the subject property. Runoff is generally directed in a westerly direction due to the topography of the surrounding area and adjacent properties. III DRAINAGE DESIGN CRITERIA A. DEVELOPMENT CRITERIA REFERENCE AND CONSTRAINTS 1 . Discussion of previous drainage studies (i.e. project master plans) for the subject property that influence or are influenced by the proposed drainage design for the site: There are no known Drainage Reports that affect this property. 2 . Discussion of site constraints such as slopes, streets, utilities, existing structures, irrigation ditches, and the site plan impacts on the proposed drainage plan : The proposed production and staging area shall have a minimal impact on drainage features on-site, Minimal grading shall be necessary to tie into existing grades. The proposed changes function well with the existing topography features and site layout. The topography is gentle with slopes generally to the west at 1 .5% to 3.5%. There are no known significant geologic features within the project area . There are two oil and gas wells to the northeast and northwest respectively and EnCana Oil & Gas facility due east of the subject property. B HYDROLOGICAL CRITERIA 1 . Identify design rainfall amounts and source of design storm depth information, NOAA Atlas, UD&FCD maps, etc. : Point Precipitation Frequency Estimates were taken from figure RA-3 and RA-6 of Volume 1, Chapter 4 of the Urban Drainage and Flood Control District Criteria Manual . The Drainage calculations can be viewed in Attachments 3, 4, 5, and 6 of this report. 2. Identify design storm recurrence intervals. Reference the appropriate information in the Appendix: Design storm recurrence intervals of 10 and 100 3 years were examined in this study. The 1-hour 10-yr as used since the site is NON —URBANIZED . Relevant calculations can be viewed in Attachments 3, 4, and 5 of this report. 3 . Identify runoff calculation method(s) and any computer models. Include summaries of the routing and accumulation of flows at all identified design points for minor and major storm runoff. Reference the results in the Appendix: The Rational Method was used to determine developed flow volumes . The Rational Formula is Q = CiA, where Q, the maximum rate of runoff is equal to the runoff coefficient C, times the rainfall intensity ( I ), times the area (A) . Relevant calculations can be viewed in Attachments 3, 4, and 5 of this report. The developed peak discharge for a 10-year storm event is 2.69 cfs, and the 100-year storm event would generate a peak discharge of 5 . 84 cfs . These discharge rates were determined using Standard Form 1 (SF-1), SF-2 and SF-3 to calculate weighted runoff coefficients, time of concentration and runoff respectively. Equations from UDFCD Rational method were used in the development of the spreadsheets . 4. Identify detention discharge and storage calculation methods and computer models. Reference the results in the Appendix: Stormwater detention storage was calculated in accordance with the Weld County Criteria using UDFCD empirical equations to develop spreadsheets. The required 100-year storm volume was calculated to be 12, 299 cf at the 5-year storm historic release rate of 0. 23 cfs. The detention pond volume is required to include volume for water quality capture volume (WQCV) with a 40-hour drain time. Using UDFCD Volume 3, Chapter 3 Figure 3-2 and the associated empirical equation with a 1-hour drain time the detention pond is required to have a WQCV of 2,630 cf in addition to the 100-year storm volume. The detention pond includes the required one foot of freeboard . Calculations are provided in Attachment 6. 5 . Discuss how off-site flows will be routed around the proposed site or over the spillway for the 100-yr developed condition: The proposed grading shall include a swale adjacent to the east boundary to capture offsite flow and route these flows around the proposed site. C HYDRAULIC CRITERIA 1. The hydraulic criteria and drainage design features of this project were designed in accordance with the Denver, Colorado, Urban Drainage and Flood Control District's ( UDFC) " Urban Storm Drainage Criteria Manual, " Volumes 1-3 and Weld County Storm Drainage Criteria identified in Chapter 8 Public Works, Article 11 Storm Drainage Criteria General Provisions and amendments to the UDFCD . 2 . Identify detention outlet type. Include a summary of the 100-year water surface elevation, spillway/overflow facility. Reference the appendix for the 4 calculations. Include summaries of the detention storage sizing and provide a stage-storage table/curve identifying water quality storage, 100-year detention pond storage, and 1 ft of freeboard. Reference the calculations in the Appendix: No channels or culverts are proposed due to the small size of the basin and the configuration of the site layout with respect to drainage. A 15-inch CMP culvert is proposed at the entrance and detention outlet. The detention pond area is shown on Plan C2, and has a capacity of 32,950 cf at an elevation of 5000.93 ft as shown in the calculations provided in Attachment 6. The top of the pond has an elevation of 5,000.93 ft and provides 1 ft of freeboard . The calculations can be viewed in Attachment 6 of this report. 3 . Identify the water quality outlet configuration. Reference the calculations in the Appendix: A two-stage outlet structure is proposed for this project with a WQCV. The outlet structure is designed to release 10-year and 100-year developed flows at the 5-year historic rate. The WQCV is designed to drain in 40-hours. The outlet structure calculations can be viewed in Attachment 6 of this report. 4. Identify culverts including diameter, type, and slope. Reference the calculations in the Appendix: There is a proposed 15-inch CMP culvert at 1. 13% at the project entrance . The culvert calculations can be viewed in Attachment 7 of this report. 5 . Identify storm sewer inlets, manholes, etc. Reference the calculations in the Appendix: There are no storm sewers proposed as part of this project. 6. Discussion of permanent erosion control features: Permanent erosion control features for the proposed site include riprap at the outlet of the access culvert, the detention pond outfall culvert and the detention pond emergency overflow spillway. Each location will require VL riprap . The permanent erosion control features calculations can be viewed in Attachment 7. 7. Discussion and justification of criteria or calculation methods (for water quality, check dams, drop structures, rundowns, etc.) used that are not presented in Weld County Code: No additional calculation methods were utilized in addition to the Urban Drainage and Flood Control District's ( UDFC) " Urban Storm Drainage Criteria Manual, " Volumes 1-3 and Weld County Storm Drainage Criteria identified in Chapter 8 Public Works, Article 11 Storm Drainage Criteria General Provisions and amendments to the UDFCD. IV DRAINAGE FACILITY DESIGN A. GENERAL CONCEPT 5 1 . Discussion of concept and typical on-site drainage patterns: The proposed improvements will include a paved surface access off of WCR 22 and gravel surfaced area for semi-trucks and other vehicles accessing the site. The surfacing material shall consist of compacted Class 5 Base on scarified, moisture conditioned subgrade. 2. Discussion of compliance with off-site runoff considerations and constraints: Runoff from off-site areas will follow the existing drainage pattern with sheet flow to the west and southwest at 1 .5% to 3 .5% slopes. The existing topography will generally remain unchanged . 3 . Discussion of the content of all tables, charts, figures or drawings in the report: Each of the Attachments provided in this report are discussed throughout the narrative of this document as they pertain to each topic. The list of Attachments to this report include the following: Attachment 1: NRCS Soils Map — Includes map and report discussing the soil conditions in accordance with soil classifications which include properties and features and hydrologic soil group for drainage calculations. Attachment 2: FEMA Map — There is no existing flood zone on this site. Attachment 3: Composite "C" Factors — Standard Form 1 from the UDFCD and Weld County Code which identify the various coefficients present on -site which are combined to create a composite "C" value used in the formula to calculate site runoff. (Q = CiA) . Attachment 4: Time of Concentration — Standard Form 2 from the UDFCD and Weld County Code utilize variables including but not limited to the drainage basin area, slope, length, etc. as defined by the rational method of computation for peak flow values. Attachment 5: Storm Drainage System Design — Standard Form 3 from UDFCD and Weld County Code including rational method computations for 10-year and 100-year peak runoff values in cfs. Attachment 6: Detention Pond Design Calculations — includes Hydrograph Report and data utilized to determine required detention pond volume. Also included in this section are the calculations for the WQCV, outlet structure and overflow weir. Attachment 7: Culvert and Pond Outlet Pipe Calculations — includes culvert analysis of the culvert under the site access and the detention pond outfall pipe. Also included in this section are the calculations for the outlet protection of the 6 access culvert, the detention pond outfall pipe and the emergency overflow spillway protection . Attachment 8: Proposed Drainage Plan — Includes Plan Sheets C1 (Cover Page) and C2 (Grading, Drainage & Erosion Control Plan ), C3 ( Erosion Control Details), C4 ( Drainage Details) and C5 ( Drainage Plan ) which show the necessary information as requested by the Weld County Site Plan Review and the Drainage Report Outline checklist. Attachment 9: Figure RA-2, 5-Year, 1-Hour, RA-3, 10-Year, 1-Hour and Figure RA-6, 100-Year, 1-Hour rainfall depth-duration frequency maps presented in the UDFCD Manual . Rainfall Intensity-Duration-Frequency Curves were created from this data . 4. Discussion of anticipated hydraulic structures (channels, pipes, rundowns, etc.) : There is a proposed outlet structure and 15-inch CMP culvert at 0.5% at the detention pond outlet, there is a concrete weir and cutoff wall at the detention pond emergency overflow spillway, and there is a 15-inch CMP culvert at 1. 13% at the proposed site entrance. The calculations can be viewed in Attachment 6 and 7 of this report. B. SPECIFIC DETAILS 1 . Discussion of maintenance access and aspects of the design. Include a maintenance plan: The site is designed to have minimal maintenance. The site shall be maintained by the owner in accordance with Weld County Code. The drainage features associated with this project are designed to tie into existing grades. The site is covered with natural vegetation and the drainage mitigation plan includes the detention pond area which contains adequate capacity for stormwater flows. Debris and other accumulations that might reduce the storage capacity of the pond shall be monitored and removed as necessary by the owner. 2 . Provide copies of CDPHE, CAFO, DRMS, or State Engineer's permit applications where applicable: No additional permit applications are included with this project. 7 V. CONCLUSIONS A COMPLIANCE WITH STANDARDS 1 . Statement of whether or not the design will meet Weld County Code: To the best of our knowledge, the drainage design set forth in the plans and specifications complies with the Weld County Standards . B DRAINAGE CONCEPT 1 . Effectiveness of drainage design to control damage from storm runoff: The proposed impoundment will serve as adequate detention to prevent developed runoff rates from exceeding historic conditions . 2 . Influence of proposed development on any applicable Weld County Master Drainage Plan recommendations: The project site is located in an area that is not defined by a Master Drainage Plan on record . There is no proposed development associated with this project that would greatly influence the drainage conditions of the site. Current drainage patterns will be retained and there will be no damage from storm runoff from this site. 3 . Identification of and intent to obtain written approval of affected irrigation company or other property owner(s). Weld County may require that the applicant provide evidence that offsite impacted jurisdictions have been notified or the proposed plans: There are no impacts of this project to irrigation companies or other property owners. The site is currently native vegetation and the property owner maintains the site. Adjacent to the property is another large oil and gas operation . The property use is compatible with the Zoning standards for Weld County Agriculture in coordination with the Use by Special Review approval process; the site shall be developed in compliance with Weld County Code. 4. Reference all criteria and technical resources utilized : Weld County Engineering and Construction Criteria — April 2012. Weld County Storm Drainage Criteria — Article XII, Weld County Code Ordinance Sec 23-12 —November 9, 2015 . Urban Storm Drainage Criteria Manual, Vol . 1, 2 and 3, Urban Drainage and Flood Control District, Denver, Colorado, current Version . 8 ATTACHMENT 1 NRCS SOILS MAP USDA United States A product of the National Custom Soil Resource ran Department of Cooperative Soil Survey, Agriculture a joint effort of the United Report for States Department of Agriculture and other VVe I d C o u n ty , \ CS Federal agencies, State Natural agencies including the Colorado , Resources Agricultural Experiment Conservation Stations, and local Service participants Southern Part CERTARUS 1 idicitjt "Jilt. . , j ppl. /A.* . , . . . . -h r .fir { I ett A" .i. _l• J ll" 1 i t . .,St: . r , t ^ '.. I ,• a*1 ' S 1 ti •1 ♦( f _ r� . October 29, 2015 Preface Soil surveys contain information that affects land use planning in survey areas. They highlight soil limitations that affect various land uses and provide information about the properties of the soils in the survey areas. Soil surveys are designed for many different users, including farmers, ranchers, foresters, agronomists, urban planners, community officials, engineers, developers, builders, and home buyers. Also, conservationists, teachers, students, and specialists in recreation , waste disposal, and pollution control can use the surveys to help them understand, protect, or enhance the environment. Various land use regulations of Federal , State, and local governments may impose special restrictions on land use or land treatment. Soil surveys identify soil properties that are used in making various land use or land treatment decisions. The information is intended to help the land users identify and reduce the effects of soil limitations on various land uses. The landowner or user is responsible for identifying and complying with existing laws and regulations. Although soil survey information can be used for general farm, local , and wider area planning, onsite investigation is needed to supplement this information in some cases. Examples include soil quality assessments (http://www.nrcs.usda.gov/wps/portal/ nrcs/main/soils/health/) and certain conservation and engineering applications. For more detailed information, contact your local USDA Service Center (http:// offices.sc.egov.usda.gov/locator/app?agency=nrcs) or your NRCS State Soil Scientist (http://www.nres.usda.gov/wps/portal/nres/detail/soils/contactus/? cid=nrcs142p2_053951 ). Great differences in soil properties can occur within short distances. Some soils are seasonally wet or subject to flooding . Some are too unstable to be used as a foundation for buildings or roads. Clayey or wet soils are poorly suited to use as septic tank absorption fields. A high water table makes a soil poorly suited to basements or underground installations. The National Cooperative Soil Survey is a joint effort of the United States Department of Agriculture and other Federal agencies, State agencies including the Agricultural Experiment Stations, and local agencies. The Natural Resources Conservation Service (NRCS) has leadership for the Federal part of the National Cooperative Soil Survey. Information about soils is updated periodically. Updated information is available through the NRCS Web Soil Survey, the site for official soil survey information. The U .S. Department of Agriculture (USDA) prohibits discrimination in all its programs and activities on the basis of race, color, national origin , age, disability, and where applicable, sex, marital status, familial status, parental status, religion, sexual orientation , genetic information , political beliefs, reprisal, or because all or a part of an individual's income is derived from any public assistance program . (Not all prohibited bases apply to all programs.) Persons with disabilities who require alternative means 2 for communication of program information (Braille, large print, audiotape, etc. ) should contact USDA's TARGET Center at (202) 720-2600 (voice and TDD). To file a complaint of discrimination, write to USDA, Director, Office of Civil Rights, 1400 Independence Avenue, S.W. , Washington , D.C. 20250-9410 or call (800) 795-3272 (voice) or (202) 720-6382 (TDD). USDA is an equal opportunity provider and employer. 3 Contents Preface 2 Soil Map 5 Soil Map 6 Legend 7 Map Unit Legend 8 Map Unit Descriptions 8 Weld County, Colorado, Southern Part 10 69—Valent sand, 0 to 3 percent slopes 10 70—Valent sand, 3 to 9 percent slopes 11 72—Vona loamy sand, 0 to 3 percent slopes 13 4 Soil Map The soil map section includes the soil map for the defined area of interest, a list of soil map units on the map and extent of each map unit, and cartographic symbols displayed on the map. Also presented are various metadata about data used to produce the map, and a description of each soil map unit. 5 Z Z :ti N th to 0 0o V V OOb4"4 00£4bt1 00Zt4447 00Tt4btb DOOM?* 006£414 008£4bb M„L St oVOT 8 1 f I ' 1 8 M„L S4 oVOT • 4 4 •.‘ 4.-:, - • .1.7.71— CAI \ I 4�' r O ;--- \ O CD in rt. - --s:F • N Co 4! • Cr) 4n11 Ce• . ...�i SI i1/4,, 1 in ai U ' J_ '44L. r*". ., N in _ -_� /iz„_.,,-'-----I AP , :1•4 11 8 g O N N tt Lil O a IX U = Q in N ':,*-. : 0 \ . 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CI) 2 .. a) i D @ a a `' C C C a) O co O w. ,., a a. a r D D D 15 :t .a a) = co 0 d CV 0 0 in O a a a .r ., a o 0 d T p .. — a a >, a) a O 46 cocO m a) = 3 a -a — o o c0 O (� (/) L O 0 O Q m w ° o �, 0 > > ``0 m a) a) 0 m c c > Y a) 3 U) a) •Q •a. •a co O c0 0 02 N C > as c cn w o •(0 a) a) C O Q co w co •o m m U O CD (� J J 2 a a a) to co (o (n co Si a c �a Q (o Custom Soil Resource Report Map Unit Legend Weld County, Colorado, Southern Part (CO618) Map Unit Symbol Map Unit Name Acres in AOI Percent of AOI 69 Valent sand, 0 to 3 percent 54. 1 45.7% slopes 70 Valent sand, 3 to 9 percent 34.8 29.4% slopes 72 Vona loamy sand, 0 to 3 percent 29.5 24.9% slopes Totals for Area of Interest 118.3 100.0% Map Unit Descriptions The map units delineated on the detailed soil maps in a soil survey represent the soils or miscellaneous areas in the survey area. The map unit descriptions, along with the maps, can be used to determine the composition and properties of a unit. A map unit delineation on a soil map represents an area dominated by one or more major kinds of soil or miscellaneous areas. A map unit is identified and named according to the taxonomic classification of the dominant soils. Within a taxonomic class there are precisely defined limits for the properties of the soils. On the landscape, however, the soils are natural phenomena, and they have the characteristic variability of all natural phenomena. Thus, the range of some observed properties may extend beyond the limits defined for a taxonomic class. Areas of soils of a single taxonomic class rarely, if ever, can be mapped without including areas of other taxonomic classes. Consequently, every map unit is made up of the soils or miscellaneous areas for which it is named and some minor components that belong to taxonomic classes other than those of the major soils. Most minor soils have properties similar to those of the dominant soil or soils in the map unit, and thus they do not affect use and management. These are called noncontrasting , or similar, components. They may or may not be mentioned in a particular map unit description. Other minor components, however, have properties and behavioral characteristics divergent enough to affect use or to require different management. These are called contrasting , or dissimilar, components. They generally are in small areas and could not be mapped separately because of the scale used . Some small areas of strongly contrasting soils or miscellaneous areas are identified by a special symbol on the maps. If included in the database for a given area, the contrasting minor components are identified in the map unit descriptions along with some characteristics of each . A few areas of minor components may not have been observed, and consequently they are not mentioned in the descriptions, especially where the pattern was so complex that it was impractical to make enough observations to identify all the soils and miscellaneous areas on the landscape. The presence of minor components in a map unit in no way diminishes the usefulness or accuracy of the data. The objective of mapping is not to delineate pure taxonomic classes but rather to separate the landscape into landforms or landform segments that have similar use and management requirements. The delineation of such segments 8 Custom Soil Resource Report on the map provides sufficient information for the development of resource plans. If intensive use of small areas is planned, however, onsite investigation is needed to define and locate the soils and miscellaneous areas. An identifying symbol precedes the map unit name in the map unit descriptions. Each description includes general facts about the unit and gives important soil properties and qualities. Soils that have profiles that are almost alike make up a soil series. Except for differences in texture of the surface layer, all the soils of a series have major horizons that are similar in composition, thickness, and arrangement. Soils of one series can differ in texture of the surface layer, slope, stoniness, salinity, degree of erosion, and other characteristics that affect their use. On the basis of such differences, a soil series is divided into soil phases. Most of the areas shown on the detailed soil maps are phases of soil series. The name of a soil phase commonly indicates a feature that affects use or management. For example, Alpha silt loam, 0 to 2 percent slopes, is a phase of the Alpha series. Some map units are made up of two or more major soils or miscellaneous areas. These map units are complexes, associations, or undifferentiated groups. A complex consists of two or more soils or miscellaneous areas in such an intricate pattern or in such small areas that they cannot be shown separately on the maps. The pattern and proportion of the soils or miscellaneous areas are somewhat similar in all areas. Alpha-Beta complex, 0 to 6 percent slopes, is an example. An association is made up of two or more geographically associated soils or miscellaneous areas that are shown as one unit on the maps. Because of present or anticipated uses of the map units in the survey area, it was not considered practical or necessary to map the soils or miscellaneous areas separately. The pattern and relative proportion of the soils or miscellaneous areas are somewhat similar. Alpha- Beta association, 0 to 2 percent slopes, is an example. An undifferentiated group is made up of two or more soils or miscellaneous areas that could be mapped individually but are mapped as one unit because similar interpretations can be made for use and management. The pattern and proportion of the soils or miscellaneous areas in a mapped area are not uniform. An area can be made up of only one of the major soils or miscellaneous areas, or it can be made up of all of them. Alpha and Beta soils, 0 to 2 percent slopes, is an example. Some surveys include miscellaneous areas. Such areas have little or no soil material and support little or no vegetation . Rock outcrop is an example. 9 Custom Soil Resource Report Weld County, Colorado, Southern Part 69—Valent sand , 0 to 3 percent slopes Map Unit Setting National map unit symbol: 2tczd Elevation: 3,000 to 5,210 feet Mean annual precipitation: 13 to 20 inches Mean annual air temperature: 48 to 52 degrees F Frost-free period: 130 to 166 days Farmland classification: Farmland of local importance Map Unit Composition Valent and similar soils: 85 percent Minor components: 15 percent Estimates are based on observations, descriptions, and transects of the mapunit. Description of Valent Setting Landform: Interdunes Landform position (two-dimensional): Footslope, toeslope Landform position (three-dimensional): Base slope Down-slope shape: Linear Across-slope shape: Linear Parent material: Noncalcareous eolian sands Typical profile A - 0 to 5 inches: sand AC - 5 to 12 inches: sand Cl - 12 to 30 inches: sand C2 - 30 to 80 inches: sand Properties and qualities Slope: 0 to 3 percent Depth to restrictive feature: More than 80 inches Natural drainage class: Excessively drained Runoff class: Negligible Capacity of the most limiting layer to transmit water (Ksat): High to very high (6.00 to 39.96 in/hr) Depth to water table: More than 80 inches Frequency of flooding: None Frequency of ponding: None Calcium carbonate, maximum in profile: 1 percent Salinity, maximum in profile: Nonsaline (0. 1 to 1 .9 mmhos/cm) Available water storage in profile: Very low (about 2.4 inches) Interpretive groups Land capability classification (irrigated): 4e Land capability classification (nonirrigated): 6e Hydrologic Soil Group: A Ecological site: Deep Sand (R067BY015CO), Sands (North) (PE 16-20) (R072XA021 KS) 10 Custom Soil Resource Report Minor Components Dailey Percent of map unit: 5 percent Landform: Interdunes Landform position (two-dimensional): Toeslope Landform position (three-dimensional): Base slope Down-slope shape: Linear Across-slope shape: Concave Ecological site: Deep Sand (R067BY015CO), Sandy (North) Draft (April 2010) (PE 16-20) (R072XA022KS) Julesburg Percent of map unit: 5 percent Landform: Interdunes Landform position (two-dimensional): Toeslope Landform position (three-dimensional): Base slope Down-slope shape: Linear Across-slope shape: Linear Ecological site: Sandy Plains (R067BY024CO), Sandy (North) Draft (April 2010) (PE 16-20) (R072XA022KS) Vona Percent of map unit 5 percent Landform: Interdunes Landform position (two-dimensional): Toeslope Landform position (three-dimensional): Base slope Down-slope shape: Linear Across-slope shape: Linear Ecological site: Sandy Plains (R067BY024CO), Sandy (North) Draft (April 2010) (PE 16-20) (R072XA022KS) 70—Valent sand , 3 to 9 percent slopes Map Unit Setting National map unit symbol: 2tczf Elevation: 3,050 to 5, 150 feet Mean annual precipitation: 12 to 18 inches Mean annual air temperature: 48 to 55 degrees F Frost-free period: 130 to 180 days Farmland classification: Not prime farmland Map Unit Composition Valent and similar soils: 80 percent Minor components: 20 percent Estimates are based on observations, descriptions, and transects of the mapunit. 11 Custom Soil Resource Report Description of Valent Setting Landform: Dunes, hills Landform position (two-dimensional): Shoulder, backslope, summit, footslope Landform position (three-dimensional): Crest, side slope, head slope, nose slope Down-slope shape: Linear, convex Across-slope shape: Linear, convex Parent material: Noncalcareous eolian sands Typical profile A - 0 to 5 inches: sand AC - 5 to 12 inches: sand Cl - 12 to 30 inches: sand C2 - 30 to 80 inches: sand Properties and qualities Slope: 3 to 9 percent Depth to restrictive feature: More than 80 inches Natural drainage class: Excessively drained Runoff class: Very low Capacity of the most limiting layer to transmit water (Ksat): High to very high (6.00 to 39.96 in/hr) Depth to water table: More than 80 inches Frequency of flooding: None Frequency of ponding: None Calcium carbonate, maximum in profile: 1 percent Salinity, maximum in profile: Nonsaline (0.0 to 1 .9 mmhos/cm) Available water storage in profile: Very low (about 2.4 inches) Interpretive groups Land capability classification (irrigated): 4e Land capability classification (nonirrigated): 6e Hydrologic Soil Group: A Ecological site: Deep Sand (R067BY015CO), Sands (North) (PE 16-20) (R072XA021 KS) Minor Components Dailey Percent of map unit: 10 percent Landform: Interdunes Landform position (two-dimensional): Footslope, toeslope Landform position (three-dimensional): Base slope Down-slope shape: Linear Across-slope shape: Concave Ecological site: Deep Sand (R067BY015CO), Sands (North) (PE 16-20) (R072XA021 KS) Vona Percent of map unit 5 percent Landform: Hills Landform position (two-dimensional): Footslope, backslope, shoulder Landform position (three-dimensional): Side slope, head slope, nose slope, base slope Down-slope shape: Linear 12 Custom Soil Resource Report Across-slope shape: Linear Ecological site: Sandy Plains (R067BY024CO), Sandy (North) Draft (April 2010) (PE 16-20) (R072XA022KS) Haxtun Percent of map unit 5 percent Landform: lnterdunes Landform position (two-dimensional): Footslope, toeslope Landform position (three-dimensional): Base slope Down-slope shape: Linear Across-slope shape: Concave Ecological site: Sandy Plains (R067BY024CO), Sandy (North) Draft (April 2010) (PE 16-20) (R072XA022KS) 72—Vona loamy sand , 0 to 3 percent slopes Map Unit Setting National map unit symbol: 363r Elevation: 4,600 to 5,200 feet Mean annual precipitation: 13 to 15 inches Mean annual air temperature: 48 to 55 degrees F Frost-free period: 130 to 160 days Farmland classification: Farmland of local importance Map Unit Composition Vona and similar soils: 85 percent Minor components: 15 percent Estimates are based on observations, descriptions, and transects of the mapunit. Description of Vona Setting Landform: Terraces, plains Down-slope shape: Linear Across-slope shape: Linear Parent material: Alluvium and/or eolian deposits Typical profile Hi - 0 to 6 inches: loamy sand H2 - 6 to 28 inches: fine sandy loam H3 - 28 to 60 inches: sandy loam Properties and qualities Slope: 0 to 3 percent Depth to restrictive feature: More than 80 inches Natural drainage class: Well drained Runoff class: Very low Capacity of the most limiting layer to transmit water (Ksat): High ( 1 .98 to 6.00 in/hr) Depth to water table: More than 80 inches Frequency of flooding: None Frequency of ponding: None 13 Custom Soil Resource Report Calcium carbonate, maximum in profile: 15 percent Salinity, maximum in profile: Nonsaline to slightly saline (0.0 to 4.0 mmhos/cm) Available water storage in profile: Moderate (about 6.5 inches) Interpretive groups Land capability classification (irrigated): 3e Land capability classification (nonirrigated): 4e Hydrologic Soil Group: A Ecological site: Sandy Plains (R067BY024CO) Minor Components Remmit Percent of map unit 10 percent Valent Percent of map unit: 5 percent 14 ATTACHMENT 2 FEMA MAP (THIS PAGE BLANK INTENTIONALLY) ATTACHMENT 3 STANDARD FORM SF-1 (COMPOSITE "C" FACTORS) in r 4_, = O C o N > o 0 0 o <r i s_ r r o o ti N `� .<1- o_ d.. Lt7 r r E r , - di I I H in o D_ O N N N Nin d' H j 0 O O O O J U O , - O O r r O O i�- r CO M r r r CDO U o o O O O J 0 0 o o i UN N 0 0 W U o 0 o O O CI- O - S . 0 Q Q '^ r 0 0r o O O o 0 0 0 0 > `W` (n H I 0 M 0 0 on O c0 co O CO 00 0 0• 1- O 0 Q M O O Mc:' co O O CO r r o 0 W . U o N O N Y '� O 0 0 0D 0 O p 0 r u. ft o o r LO ft O O 0 0 co o c0 o O Q in o o O < ¢ o • 0Oa c0 O co 0 c0 LPL W a_ it r O C O W W • U °O °- W L.L. O U 0 0up0 CI o O c 00 0 � O � U) O0 0 N CC U) O o 0 0 O o 0 0 O Q 0 O o O o Q 0 Q o 0 o 0 0 O. 0 o O ILO } Q } Q 0 Z J J wCI) wU) 0 > Q o N co > Q U N N O? O O O p gzr Z ccO '� 000 ccOQ 0-i cis 6 O ' M Q O U CC I— . 1 I . U) L- Q o LQ O wcrC0rn ^ 0 00 00 00 � � O CD N- - N- O � Q • O 00 00 00 00 — pcQo000 ccQ `- o 00 OO 00 00 WS J . 4 I J 0 Q o O N 0 I-LJ0 Q , ti c O O O \ ' -- Lti > � 0 > �Li j Q o or 00 00 r` E � C r- Z QQi- OoO QQ �- o oN o0 00 0 U � � Z . cn 1.1.1 Ili U) z DOWWW z ila L• D > 000 in mm t- wcom z w < D ° >- J WLUW O O z rr ( I r UOQ i -J Q QQa0m-I -) oO rr r L CC Q = w m Q m Q I- O H CIA 0_ U U 0 m = m = H (q 0 I WASELINE STORM STORAGE CALCULATIONS T, . . . . . . . . . . . .:. aiv.• a.•. . . DETENTION POND PROJECT NAME: Certarus LLC DATE: 11 /11 /2015 PROJECT NUMBER: PL317 CALCULATED BY: TGR CHECKED BY: NJN I DESIGN DRAINAGE AREA Onsite Area = 3.31 ACRES CALCULATED % IMPERVIOUSNESS = 41 .0% 10-YR STORM CALCULATIONS EQUATION : V10=((0.95*I - 1 .90)/1000)*A V10 = 5342 CF EQUATION : Q5=0.07 A RELEASE @ Q5 = 0.23 CFS 100-YR STORM CALCULATIONS EQUATION : VlooA=(-0.00005501 *I^2+0.030148*I-0. 12)*A/12 V100A = 12299 CF EQUATION : Q100=0.07 A RELEASE @ Q 100= 0.23 CFS WATER QUALITY STORAGE VOL. EQUATION : WQCV=01 .0*(0.91 *i3-1 . 19*i2+0.78*i) 0. 1825 X 1 .2 WQCV = 2631 CF TOTAL REQUIRED VOLUME = 14930 CF (100-yr + WQCV) OUTLET STRUCTURE DEVELOPED BASIN A AREA MINIMUM POND VOLUME, V= 14930 cf Q5-Release = 0. 17*Design Drainage Area 0.23 cfs h5= 0.9 Q100-Release = 1 .0*Design Drainage Area 0.23 cfs hi 00= 1 .5 SIZE 5-YR OUTLET CONTROL USE ORIFICE EQUATION : Q=Cd (0.6) * A * (2 g h)^0.5 ORIFICE PLATE DIA. AREA, A5= 0.05 sf OR 3.0 inches in diameter SIZE 100-YR OUTLET CONTROL USE ORIFICE EQUATION : Q=Cd (0.6) * A * (2 g h)^0.5 ORIFICE PLATE DIA. AREA, A100= 0.04 sf OR 2.7 inches in diameter OUTLET PIPE, D100= ( 12" minimum) 15 in. diameter SLOPE, S= 0.5% HYDRAULIC RADIUS, FULL FLOW 0.31 ft FLOWS FULL AT Q= 4.6 cfs USE MANNING EQUATION with n = 0.013 SET BOX 0.9 feet high BOX CAPACITY, QOUTLET= 44.8 cfs Q=Cd(0.6) A (2 g h)^0.5 SPILLWAY DEPTH 0.25 ft LENGTH OF SPILLWAY 18.0 ft Q100=CW(2.6) L (hmax ht)^3/2 OUTLET STRUCTURE SIZING SUMMARY PROVIDE A 3.0 INCH DIAMETER ORIFICE PLATE @ FL ELEVATION FOR 5-YR FLOWS PROVIDE A 2.7 INCH DIAMETER ORIFICE PLATE @ FL ELEVATION FOR 100-YR FLOWS WASELINE VOLUME CALCULATIONS �- • DETENTION POND 1 PROJECT NAME: Certarus LLC DATE: 11 /11 /2015 PROJECT NUMBER: PL317 CALCULATED BY: TGR CHECKED BY: NJN DETENTION POND DESIGN DRAINAGE SUMMARY CALCULATED WQCV REQUIRED = 2631 CF 10-YR STORAGE REQUIRED = 5342 CF 100-YR STORAGE REQUIRED = 10386 CF 100-YR STORAGE + WQCV REQUIRED = 14930 CF DETENTION POND DESIGN ASSUMPTIONS USE CONIC METHOD FOR POND SIZING Elev (ft) Area (sf) Area* (sf) Volume (cf) Sum Vol (cf) 4998.4 0 0 0 0 4998.6 735 735 49 49 4998.8 3510 5851 390 439 4999.0 8080 16915 1128 1567 4999.2 12450 30560 2037 3604 4999.4 15205 41414 2761 6365 4999.6 16105 46959 3131 9496 4999.8 16510 48921 3261 12757 5000.0 17240 50621 3375 16132 AREA*= 5000.2 17830 52603 3507 19639 AREA1 +AREA2+(AREA1xAREA2)1 /2 xAREA2)1 /2 5000.5 18745 54857 5486 25124 VOLUME* = 1 /3 x depth x AREA* 5000.9 20390 58685 7825 32949 WQCV ELEV. = 4999.11 ft DWQ= 0.7 ft 10-YR ELEV. = 4999.33 ft D10-yr= 0.9 ft 100-YR + WQCV ELEV. = 4999.93 ft D100-yr +WQ= 1 .5 ft STORAGE VOLUME 4999.6 4999.4 - • - 4999.2 - • - z _O 4999.0 - P 4998.8 - • • J W 4998.6 - • 4998.4 4998.2 - 0 1000 2000 3000 4000 5000 6000 7000 VOLUME (CF) OUTLET DETAIL CALCULATIONS WQCV = 0.0604 ACRE-FT K40 = 0.0616 =0.013D2+0.22D-0. 10 D= 0.7 ft (1ft. min. depth) a = 0.98 in2/row =WQCV / K40 Use one column of circular perforations with a hole diameter of 3/8". (Per Table OS-1 from UDFCD Manual) in r O N r r r r w H Q a C co a, C La L co O a) a U co cm LL O O - c_ O 0 0 `- e D u_ u O co N- O O Up Co a) J D D = O r r Q gi >L J J >, a) O E co 00 03 >a (o (0 C r _ a, c O 0 0 'Q O L D �O 4- O I w z 0 .o 2 2 O E E W a _N m �, O O O 3 --n-a) c "a II u_ u_ a u_ W H H _J > H U CD CD J a) -C -C LL >!) C) C) 4J 4-4 / v}- U '4- C 4-- 44- _ L j f` CO LO O O J CD O O O) > O O N O O > N O p Z D W J C' = n W U 5 v W Z do N O _ r ii Z V) „ u) o rn a < II d - II Z CC ii 0z O � O ii O 0- > w O co LU o H E— Ce f- CC z Q w Q rt II II W UO U O Q .. J H El W i = w CC z U W > O > _I LL H _ _ II 0O < Q 0 w z o ~ O c) O ? w a. N w > O LL r O p Q H U) Q Z Z I H 0_ 0_ Z D D 0- cc) ow z o z z ii CO CO w a z < U w a = N_ cC ~ ■w in 2 2 ILIa = ~ `-1M J Z -no waa. C J Z w OWE .no i N._ ~ G . ■r. (o r "SEA CO "" Z _ ■.. N J O -) _.■. U Z .0 d H �.w LILI . '"n. _■a tin ;:: w ca }M :..• W g< :i CD ° > :w ZZwm :: HI— QHA igi .:: U U _1 Y -J I o ° ;M O O -Jw ::: CC CC Q = li- O- 000 ATTACHMENT 4 STANDARD FORM SF-2 (TIME OF CONCENTRATION) O N O U O •Ln o co rn r N _ p U O O N i N r J Q) Q V r Z +' 2 L w O H r Q + CI o -- op CO E • Z a U m . we J 2 2 w Q I-- o Z Q Z +.' Q F- w CO J Cl- N... O 4 r N N 0 C• N r • CI 277-- 't W I . . 0- J O LU j � � o `J Z > `" lil O c 0 Q as _i x Ce t 2 X I. = o us N ( CD W2 w 2 _ O CJ p J o a Cn Z w k .c co • O 'a I w C4 U eG o O 0 el r IL O co cL Liu Q - a C I O o o co J Z cn I- = CO O . -- r` z LL � r w J o ~ 2 ...... N w J I- a c o Q - - O 2 in it w J r U ZCI) J O J _ p I Cr J 2 W L r Z LL S co L w A- t _J C� z J Z . U 0_ H Z co IMMIll Lo ....... UCNI o LU . . . F.w < r J wmm Qa Mill v m H a o _ zz Wm ? o :.o UU ¢ w we Z o` 'n Z r^ o n N �� r a CL CLUU D m ATTACHMENT 5 STANDARD FORM SF-3 (STORM DRAINAGE SYSTEM DESIGN) CO Ce Q N 5 N w re in (ulw) r }1 (sdj) � o _ W A1130-13A N di H Q cc On i ~ HION3-1 (u !) 3ZIS o 3dld w (°/0) I—, a 3d01S z w (sp)MOid a > w NOIS3a Q (so)MO-ld . W w .1.331:118 O F- 0 0/0) Lii co a, 0 3dO1S -- O 0 -Jr (SP) c; > w r u. 0 w 2 uCa _ J 0 z (ail/u!) N Q ��= = r O Z z--- (u !ua)3; o r u_ 0 0 . O c7 re W (sp) a cD O• 0 0 Q 0 (au/u!) o F- Q I -- `y V) Z . Q u- (os)vs,a t- o ` o ce o z . rz 2 et (u ! w) 31 o cd et t- c\1 w g- 0 3d300 ^ N o ddoNnu (ad) co V32IV W N I Sods --0. M Z • (L ' NJIS3a a) O 7 pc z INIOd N .11 0 11 H Z NJIS3a W . 0 L w worm z z o m 3N11 --- UUQ0 W2IOiS Y a a 9w D Q = a_ 0_ OO CO Ce Q N 5 N w Ce in (uiw) }1 (sdj) � a _ W A1130-13n ---• H Q Q cc On i o ~ HION3-1 (u !) 3ZIS o 3dld w OA) IZN Z a 3d01S W (slo)MO-Id a > NOIS3a Ce Q . I- (sP)MO-ld W w 1332I1S >- w _ . 0 o (%) I) a, 0 3dO1S O Z -' sa ( ) W i. W cW r O G J „ Z (ail/u!) N I M Z ill Ce - _ u_ 0 'E. Q (oe) cn it Q O (tc0)! Ct p Z _ (u !w)a; te" O cc . . 0 _re co (sp) a, . n Q W O -- N 0 O _ . Z W (ay/u!) ^ a) 1— Q I N . Z ^ 0 LL (oe)d*a N Q p o rC 2 et (u ! w) 31 o cd cc le V - N I- W oleo dd303 ,n �, U) o ddoNnu (ad) 44- co V32IV W N I Sods --0. M Z • (L ' NJIS3a 7 pc Z a) O z INIOd N .11 op_ F- z NJIS3a W . 0 L W • wmm z z ° m 3N11 -� r U U Q 0 W2IOIS al O O jw D Q = a_ 0_ OO CO Ce Q N 5 N w Ce . in (U I U.° •-•N o 2 }1 . �_ (sdj) a W A1130-131\ N H Q Q cc On i ~ HION3-1 (u !) 3ZIS o 3dld w (%) ,` Z a 3d01S > (sp)MO-u a w NOIS3a W I- (sp)MO-d n >- will 133211S 0 0 (%) 4,7 a r 3d01S O 0 w = (S}z) M > I—w N u. 0 WI z (au/u!) J Q cc I M z y- _, - . u_ 0 Q (oe) ,, 0 I (u • UJ)31 00Ce 7) (sp) . 71- Q w 0 0 0 _ . Qw (ay/u!) 0) O o0 z u.. , o Q � (oe)v*a b ce z o rC Ce (11 ! 111) 31 o cd 5 t- C\I ce U - . O W 001.0 ±1303 ,n I- 6 ±IONnu `" (ay) 44- co V32IV Wi: N I Sods --0. M NJIS3Z • (L ' a � 7 pc Z a O z INIOd N .11 o n_ H z NJIS3a W . 0 L W • wmm z z m 3N11 --- UUQ0 IN2IOIS Y OO9W D Q = ELOOO ATTACHMENT 6 DETENTION POND DESIGN CALCULATIONS 2 a_ 0 r (Si 000000 r r N N N N N N m M N') M M ! 0'7 M et et Q Q Q Q Q Q Q Q Q Q Q Q Q Q Q Q Q Q Q Q tO ❑ _O O O O O O O O O O O O O O O O O O O O O O O O O Z Z Z Z Z Z Z Z Z Z Z Z Z Z Z Z Z Z Z Z O > !L O O O O O O O O O O O O O O O O O O O O O O O O * *✓k * * *k *% *k *k %# % *k *# *k It *t *k it * *k * N r T T N Te cO N L N Wa 0 EL co a) cr) N .a m N 3 L m o Q Et 0 EL N N cO N L o 3 a O Q Ct T 4) r N P cO N L C2o a O Q EL O O O N P m N L o Q a O EL V iy Ci 67 w O7 .._ u r 700r T -C3 rm O OIt ja)0 Q d ' ' r (1„ 0„ W rt co m w r cO r ~- L W O 0 a) Q 0 > aa _ r r r 70 @ T 3 0 L m ... 0 0 0 IY > Q0 W — 2 N N o 0 o L O0000 _} 0000 IY o EL 0 0 0 0 0 0 0 0 0 0 ( ri IC) N Lo W r 70 m T N Y. '') < (:) o 2i . '� — O EL � • CI Q D 4 0 0 w T C O U o O CJOOD N poa � 0 Qhe O O J = M ; a) co }• r • cur Q 03 a) (1 w ) 0 a � . N � O N m N— UJ c 4. L W - O ' j Q O LL o CO CO ro O. c o o N LLJ �_ Cos � 0 O O W -C a) C C To r O 7° Mr r? CO a) L CH L Iy L .L 3 .p.1 L I 0 L CO i 7 D 7 0 Cr Cr Cr d Q)TD >w < �' L c0 0 0 Q N CON CO 0 U t.) N . O N I CO Z o 0 0 o O • cur NO r O ,_ N Z W O Q EL N I I I I II II rtr. Il II II Co oz = a) Q Q O Q o a) @ a) To To CO o re L6 L Q O)"arL o C) 5 a) Q O N d co ? Q CO To M COEn _ 0 co L L O N O O V/ E LL C O sal) co co CC ft O Q E 2 Opp 3 70 0 O E O E -o - c Q Q 3 3 _ 0 > O 75 O O U Uct3 R3 N V, E CO O C CSJ CO O cn Q) O O a) ,!:,--- o U - C 7070 R' O Q CIO CO D M O) O) N LO Or 000 D O U) C C (a r Co r O O CO O O ( C c C O L III Q 2 Z U (n Q m W H0 45 co V) N O U) C C >0+ A a) O O ` O O L •< 71-5. 2W2 ♦- f- a W > Q r O N `c 0 "-6 "50 .c w w 75 w r Q ° Y Q c!O) M o o o 0 o 0 0 0 o 0 0 0 o o o o 0 0 0 0 0 0 o o Q Q Q Q Q Q Q Q Q Q Q Q Q Q Q Q Q Q Q Q 72 ca c ) O o aoo o a� o 0 0 o O o O o 0 o 0 0 0 o 0 o O O O 0 0 0 O O Z Z Z . . . . . Z Z Z Z Z Z Z Z z . . . . . Z Z Z Z Z Z L m 3 0 E co o n E L o • • ` L a) O a) 0 o 0 0 0 0 0 0 0 o o o o o 0 0 0 0 0 0 0 0 0 0 O U 3 o z r c 0 3 (CD i o X m 666666666666666666666666 C C CU • •co U O 0 N 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Q Q Q Q Q Q Q Q Q Q Q Q Q Q Q Q Q Q Q Q N O U Sco .� o O o o O O O o o o o o o o o o o o o o o o o o o o o o z z z z z z Z Z Z Z Z Z Z Z Z Z Z Z Z z c a- 3 o O U a� Q w o O o 0 0 0 0 0 0 0 o O o 0 0 0 0 o O o 0 0 0 0 4t u * * * * * * * It it u * * * * * * * * > Q o 0 (/) m O o >_ 666666666666666666666666 O U; D M O > (7 x CD N cn 0. E U c E o a) cr) 1. O O c L 000000ticoOMvc4w � ovaooMvcor� aoaoQQQQQQQQQQQQQQQQQQQQ car N O 0 0 0 0 0 0 00 N lt) ti O r N d CO ti (70 O r N M In CO L > cts 0) O '� O O O O O O O O r r r r N N N N N N M M M M M M M Z Z Z Z Z Z Z Z Z Z Z Z Z Z Z Z Z Z Z Z L Z Q t > > •N C 0 m O o O o O O o O O 000 C:) 000 O O 000000 * * it it * * * it it it it it * it it It it * * It > Q ct cI C1 c To O = gt 666666666666666666666666 0 O O 0 _ .c ❑ c to Q .in- CO 0 V O C) 0 0 O o o O o o o o o o o o o o o o o o o o o O o o o a) 0 s O CO h co O O N-- N Cr) cr I-0 CO r--- co O O r N Cr) In CO ti (7)CO � 0 — > i +' c0 M c0 co oS 6) O o 6) 67 67 6) 6 0 0 0 0 0 0 0 0 0 0 0 0 OL ) ci d d 67 O a7 O o d7 d7 O) O) D7 67 d7 47 O O O O O O O O O O o f6 +' ++ ma O) O O O) O) O) O) O 07 07 O O) o O O O O o 0 o O O a m 0 7r 'cr � � dd � cr � l �t71—gd- WLOLOLnLDLCLnL0Lncn c t o 0 ATTACHMENT 7 CULVERT AND POND OUTLET PIPE CALCULATIONS CIRCULAR CONDUIT FLOW (Normal & Critical Depth Computation) Project: Blue cells are for user data entry Pipe ID: Green cells are calculated values 7. Tc C. - 5 Haw (---- angle ATMS r Y k1, .. '/ ` s- - f- Y { } Design Information (Input) Pipe Invert Slope So = 0.0113 ft/ft Pipe Manning's n-value n = 0.0250 * Pipe Diameter D = 15.00 inches Design discharge Q = 3.58 cfs I Full-flow Capacity (Calculated) Full-flow area Af = 1 .23 sq ft Full-flow wetted perimeter Pf = 3.93 ft Half Central Angle Theta = 3.14 radians Full-flow capacity Qf = 3.58 cfs Calculation of Normal Flow Condition Half Central Angle (0<Theta<3.14) Theta = 2.26 radians Flow area An = 1 .08 sq ft Top width Tn = 0.96 ft Wetted perimeter Pn = 2.83 ft Flow depth Yn = 1 .02 ft Flow velocity Vn = 3.33 fps Discharge Qn = 3.58 cfs Percent Full Flow Flow = 100.0% of full flow Normal Depth Froude Number Fr, = 0.55 subcritical Calculation of Critical Flow Condition Half Central Angle (0<Theta-c<3.14) Theta-c = 1 .79 radians Critical flow area Ac = 0.79 sq ft Critical top width Tc = 1 .22 ft Critical flow depth Yc = 0.76 ft Critical flow velocity Vc = 4.56 fps Critical Depth Froude Number Fr, = 1 .00 * Unexpected value for Manning's n Entrance-UD-Culvert_v3.03.xlsm, Pipe 11/11/2015, 12:32 PM CULVERT STAGE-DISCHARGE SIZING (INLET vs. OUTLET CONTROL WITH TAILWATER EFFECTS) Project: Blue cells are for user data entry Basin ID: Green cells are calculated values Status: as mien a India ctben s'man ID l W Carta v.y A -—= L On H fa.. {M I `_ >> t' , Mips If sin idrrr LL Y- Design Information (Input): Salsa L Sasa Circular Culvert: Barrel Diameter in Inches D =) 15 inches Inlet Edge Type (choose from pull-down list) 1.1 : 1 Beveled Edge OR: _ Box Culvert: Barrel Height (Rise) in Feet Height (Rise) = ft. Barrel Width (Span) in Feet Width (Span) = ft. Inlet Edge Type (choose from pull-down list) Square Edge wl 30.78 deg. Flared Wingwall Number of Barrels No = 1 Inlet Elevation at Culvert Invert Inlet Elev = 5003.82 ft. elev. Outlet Elevation at Culvert Invert OR Slope of Culvert (ft v./ft h.) Outlet Elev = 5002.61 ft. elev. Culvert Length in Feet L = 107 ft. Manning's Roughness n = 0.025 Bend Loss Coefficient Kb = 0 Exit Loss Coefficient Kx = 1 Design Information (calculated): Entrance Loss Coefficient Ko= 0.20 Friction Loss Coefficient lc= 9.14 Sum of All Loss Coefficients Ks= 10.34 Orifice Inlet Condition Coefficient Cd= 0.92 Minimum Energy Condition Coefficient KEww«_ -0.0929 Calculations of Culvert Capacity (output): Water Surface Tailwater Culvert Culvert Controlling Inlet Flow Elevation Surface Inlet-Control Outlet-Control Culvert Equation Control Elevation Flowrate Flowrate Flowrate Used: Used ft cfs cfs cfs (ft., linked) (output) 5004.00 0.10 2.75 0.10 , Min. Energy. Eqn. INLET 5004.05 0.20 2.77 0.20 Min. Energy. Eqn. INLET 5004.10 0.40 2.80 0.40 Min. Energy. Eqn. INLET 5004.15 0.50 2.84 0.50 Min. Energy. Eqn. INLET 5004.20 0.60 2.88 0.60 Min. Energy. Eqn. INLET 5004.25 0.70 2.89 0.70 Min. Energy. Eqn. INLET 5004.30 0.90 2.93 0.90 Min. Energy. Eqn. INLET 5004.35 1.10 2.96 1.10 Min. Energy. Eqn. INLET 5004.40 1.30 3.00 1.30 Min. Energy. Eqn. INLET 5004.45 1.50 3.04 1.50 Regression Eqn. INLET 5004.50 1.60 3.07 1.60 Regression Eqn. INLET 5004.55 1.80 3.09 1.80 Regression Eqn. INLET 5004.60 2.00 3.13 2.00 Regression Eqn. INLET 5004.65 2.20 3.16 2.20 Regression Eqn. INLET 5004.70 2.40 3.20 2.40 Regression Eqn. INLET 5004.75 2.70 3.23 2.70 Regression Eqn. INLET 5004.80 2.90 3.27 2.90 Regression Eqn. INLET 5004.85 3.20 3.29 3.20 Regression Eqn. INLET 5004.90 3.40 3.32 3.32 Regression Eqn. OUTLET 5004.95 3.70 3.36 3.36 Regression Eqn. OUTLET 5005.00 3.90 3.39 3.39 Regression Eqn. OUTLET 5005.05 4.20 3.43 3.43 Regression Eqn. OUTLET 5005.10 4.40 3.48 3.48 Regression Eqn. OUTLET 5005.15 4.60 3.54 3.54 Regression Eqn. OUTLET 5005.20 4.90 3.61 3.61 Regression Eqn. OUTLET 5005.25 5.10 3.66 3.66 Regression Eqn. OUTLET 5005.30 5.30 3.72 3.72 Regression Eqn. V OUTLET 5005.35 5.50 3.79 3.79 Regression Eqn. OUTLET 5005.40 5.70 3.84 3.84 Regression Eqn. OUTLET 5005.45 5.90 3.89 3.89 Regression Eqn. OUTLET Processing Time: 00.18 Seconds Entrance-UD-Culvert_v3.03.xlsm, Culvert Rating 11/11/2015, 12:32 PM Determination of Culvert Headwater and Outlet Protection Project: Certarus USR Basin ID: Developed Basin Al H t-Ir, I-..- t __'�•�- - gin ________ .. _ - T SoiClhb aeone: r QQ Sandy O Non-Sandy d <4' Design Information (Input): Design Discharge 0 = 3.58 cfs Circular Culvert: Barrel Diameter in Inches D =I 15 - 'inches Inlet Edge Type (Choose from pull-down list) 1.1 : 1 Beveled Edge w Box Culvert: OR Barrel Height (Rise) in Feet Height (Rise) = tt Barrel Width (Span) in Feet Width (Span) = ft Inlet Edge Type (Choose from pull-down list) w I Number of Barrels No = 1 Inlet Elevation Elev IN = 5003.82 ft Outlet Elevation OR Slope Elev OUT = 5002.61 ft Culvert Length L = 107 I ft Manning's Roughness n = 0.025 Bend Loss Coefficient kb = 0 Exit Loss Coefficient kx = 1 Tailwater Surface Elevation Elev Y. = 5004 ft Max Allowable Channel Velocity V = 5 ft/s Required Protection (Output): Tailwater Surface Height VI = 1.39 ft Flow Area at Max Channel Velocity A7 = 0.72 ft2 Culvert Cross Sectional Area Available A = 1.23 ft` Entrance Loss Coefficient ke = 0.20 Friction Loss Coefficient kr= 9.14 Sum of All Losses Coefficients ks = 10.34 ft Culvert Normal Depth Yn = 1.02 ft Culvert Critical Depth Ye = 0.76 ft I Tailwater Depth for Design d = 1.01 ft Adjusted Diameter OR Adjusted Rise U. = - ft Expansion Factor 1/(2'tan(O)) = 6.70 Flow/Diameter25 OR Flow/(Span ' Rise' 5) O/D^2.5 = 2.05 ftos/s Froude Number Fr = 0.55 Tailwater/Adjusted Diameter O Tailwater/Adjusted Rise Yt/D = 1.11 Inlet Control Headwater HWI = 1.12 ft Outlet Control Headwater HWo = 1.16 Design Headwater Elevation HW = 5,004.98 ft Headwater/Diameter OR Headwater/Rise Ratio HW/D = 0.93 • Minimum Theoretical Riprap Size d5o = 1 in Nominal Riprap Size d50 = 6 in UDFCD Riprap Type Type = VL Length of Protection L P = 4 ft Width of Protection T = 2 ft ATTACHMENT 8 POINT PRECIPITATION FREQUENCY ESTIMATES RAINFALL DRAINAGE CRITERIA MANUAL (V. 1 ) 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 63 W 1 .3 1 .41 .45 1 .45 1 .4 1 .35 \ L35 L4 I I 1 n LONGMaNT t- r \ 7 NIWOT `'' i -7 _ Hes j D_ I - i CC $- 1 .2 WE BRIGHT . • ADAMS 0w �, O J .a. - 51 0 M \BOiLDER JE EPSON / -...-T1 ` : aI ( p a DENVER w C..1 tk 1 \ I u_ a Lu 1 .3— '' r-L X ,- 1 .31 ADAMS i D' \VER ARAPAHOE ,n \ / 1 I -t VEF'G 'EEiJ [ i LJ Q / H -....:::::,„_J_ A PAHOE ARAPAHOE J CC D� GLAS ELBERT IOtlIFER • . _r,L,y u a lER P • • SEDALIA `f' X 1 .39 '- 1 .0 i .2 1 .3 FRANKT Nil 1 .4 1 .4 R 71 W R 7D W R 69 W R 68 W R 67 W R 66 W R 65 W R 64 W Figure RA-2—Rainfall Depth-Duration-Frequency: 5-Year, 1 -Hour Rainfall RA-14 01 /2004 Urban Drainage and Flood Control District You created this PDF from an application that is not licensed to print to novaPDF printer (http://www.novapdf.com) 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 _ = 1 5 1 .6 1 .7 1 . 7 1 . 75 1 .75 1 .65 1 ,6 1 .6 1 .65 1' LONGMONT ,_ • 7 \ - \ ._ Z 55 ,_ r r� WEL i .4 BRIGHT° ADD r s 7 I :: v ,II BO LDER • E F ERSON f I .� EN 1LiiE1IvEP i- ,_ 7 ) j G r / Lu \ I �, , M i_ \ rte, ADAMS D' VER ARAPAHOE4, v)._, I d- J , ` i- 1 .3 EVE -PEEN 1 65 v 15 n u: d r LW CC -)I ' APAH0E ARAPAHOE t D• GLAS ELBERT CONIFER co Ls_ o in PAR ER in to IE om • 0 l %L6 SEDALIA v) r r 1 .3 1 .4 1 .5 ^`Ili \ 1 .65 1 .7 1 .65 1 . 7 R 71 W R 70 W R 69 W R 66 W R 67 W R 66 W P 65 W R 64 W P' 5 Figure RA-3—Rainfall Depth-Duration-Frequency: 10-Year, 1 -Hour Rainfall Rev. 01 /2004 RA-15 Urban Drainage and Flood Control District You created this PDF from an application that is not licensed to print to novaPDF printer (http://www.novapdf.com) RAINFALL DRAINAGE CRITERIA MANUAL (V. 1 ) R 71 W R 70 W P 69 ^' P 68 Vv R 67 W R 66 W R 65 W R 64 W R 63 W 2.4 2.5 2.652.7 2.6L 2.652.7 :j, \ 2.6 LONGIv10NT \ \ ____ I • \ 0 \I „ \/ CN I r, I w 0 Z J 0 Si ! NELD2.3 ArBRIGHTO DAMS1/ yr wvi br r _i z a I— O m :0 IL DER J F ER .ON f 1 '(Nun CL lENLP w ,/ /M M _1 . ADAMS OVER ARAPAHOE v) .* 2. 1 _, 2. 1 ` . 2.7 • EVE' -EEN C c Ln i L42 i A2 �r 2.6 5 1. H A' APAHOE ARAPAHOE 2.05 \ IQ C} LAS ELBERT ONIFER , ,vs �^ 4 1` 'O PA!;'ER via l— co r n I• r og o m N 2.05 1 SEDALIA _` ^^N H _ ' �' H FRANKT WN 2.5 \ • 2. 1 2. 15 2.2 2.3 2 2.R 71 W R 70 W R 69 W '4 R 68 W R 67 W R 66 'W F R 64 W R 63 W Figure RA-6—Rainfall Depth-Duration-Frequency: 100-Year, 1 -Hour Rainfall RA-18 01 /2004 Urban Drainage and Flood Control District You created this PDF from an application that is not licensed to print to novaPDF printer (http://www.novapdf.com) ATTACHMENT 9 PROPOSED GRADING & DRAINAGE PLAN 0 i -:,,, CERTARUS LTD. _ _ ==_ e... g ,u . USR15-0077 ==== = 0 SOUTHEAST 1/4 OF SECTION 10, T2N, R66W, 6TH P.M, I oI COUNTY OF WELD, STATE OF COLORADO CONTACTS ® 1 43 0 o COVER SHEET . • APPLICANT CERTARUS LTD = i- G ROD SAVILLEcc STANDARD FROSION AND SFDIMFNT CONTROL NOTES: 1250, 555 4TH AVE SW = y • SHEET INDEX CALGARY, AB T2P 3E7 0 co 1. LANDOWNERS AND/OR CONTRACTORS ARE RESPONSIBLE FOR OBTAINING A PERMIT FOR STORMWATER DISCHARGES ASSOCIATED WITH CANADA 0 cri rn CONSTRUCTION ACTIVITIES FROM THE COLORADO DEPARTMENT OF HEALTH & ENVIRONMENT (CDPHE), AT LEAST TEN (10) DAYS PRIOR TO THE (403) 930-0120 START OF CONSTRUCTION ACTIVITIES IF CONSTRUCTION ACTIVITIES WILL DISTURB 1 (ONE) OR MORE ACRES OF LAND, OR IF THE PROJECT BELONGS rn vs TO A COMMON PLAN OF DEVELOPMENT THAT WILL DISTURB 1 (ONE) OR MORE ACRES. IN THE EVENT THAT LOT/PARCEL, WHICH BELONGS TO A C1 — COVER cz COMMON PLAN OF DEVELOPMENT THAT DISTURBED 1 (ONE) OR MORE ACRES, IS SOLD THEN THE NEW LANDOWNER AND/OR CONTRACTOR IS C2 - GRADING AND EROSION CONTROL PLAN RESPONSIBLE FOR OBTAINING PERMIT COVERAGE FOR THAT LOT/PARCEL. OWNER CANNON LAND COMPANY 2. LANDOWNERS AND/OR CONTRACTORS ARE RESPONSIBLE FOR OBTAINING A GRADING PERMIT FROM WELD COUNTY IF CONSTRUCTION ACTIVITIES C3 - DETAILS EROSION CONTROL 3575 E. CHERRY CREEK N. DR. WILL DISTURB 1 (ONE) OR MORE ACRES OF LAND, OR IF THE PROJECT BELONGS TO A COMMON PLAN OF DEVELOPMENT THAT WILL DISTURB 1 DENVER, CO 80209 (ONE) OR MORE ACRES. C4 - DETAILS DRAINAGE 3. THE PERMITTED LANDOWNER AND/OR CONTRACTOR MUST KEEP A COPY OF THE CDPHE STORMWATER DISCHARGE PERMIT, STORMWATER C5 - DRAINAGE PLAN a O! O L MANAGEMENT PLAN (SWMP) AND INSPECTION LOG AVAILABLE ON-SITE THROUGHOUT THE DURATION OF THE PROJECT, AND FOR AN ADDITIONAL WELD COUNTY PLANNING CHRIS GATHMAN g O i O 1 THREE (3) YEARS AFTER INACTIVATION FORM IS FILED WITH THE STATE. AI , DEPARTMENT 1555 N 17TH AVE S$ 6 N GREELEY, COLORADO 80631 4. THE PERMITTED LANDOWNER AND/OR CONTRACTOR MAY INACTIVATE THE STATE PERMIT WHEN FINAL STABILIZATION IS REACHED. AS LONG AS WCR 22CITE (970) 353-6100 X3540 ALL SOIL DISTURBING ACTIVITIES AT THE SITE HAVE BEEN COMPLETED AND A UNIFORM VEGETATIVE COVER HAS BEEN ESTABLISHED WITH A DENSITY OF AT LEAST 70 PERCENT OF PRE-DISTURBANCE LEVELS, OR EQUIVALENT PERMANENT, PHYSICAL EROSION REDUCTION METHODS HAVE BEEN EMPLOYED. WELD COUNTY SHERIFFS JOHN COOKE aa DEPARTMENT WELD COUNTY SHERIFF 5. THE PERMITTED LANDOWNER AND/OR CONTRACTOR MUST PERFORM INSPECTIONS OF ALL BMPS EVERY 14 DAYS AND ALSO AFTER ANY SIGNIFICANT STORM EVENT (RAIN OR SNOWMELT) THAT MAY CAUSE EROSION TO ENSURE THAT BMPS ARE FUNCTIONING PROPERLY. INSPECTION (970) 356-4000 OR 911 m LOGS MUST BE KEPT WITH THE SNP. ALL NECESSARY MAINTENANCE AND REPAIR SHALL BE COMPLETED IMMEDIATELY. a 6. ALL CONSTRUCTION PROJECTS, WHETHER THEY DISTURB LESS OR MORE THAN 1 (ONE) ACRE SHALL INSTALL, MAINTAIN AND REPAIR EROSION PLATTEVILLE-GILCREST 303 MAIN STREET a AND SEDIMENT CONTROL BEST MANAGEMENT PRACTICES (BMPS) ACCORDING TO THE STORMWATER MANAGEMENT PLAN (SWMP) AND/OR EROSION FIRE PROTECTION DISTRICT PLATTEVILLE, CO 80651 W CONTROL PLAN TO ASSURE CONTINUED PERFORMANCE OF THEIR INTENDED FUNCTION. EROSION & SEDIMENT CONTROL MEASURES (BMPS) MUST BE WCR 20 (970) 785-2232 OR 911 a INSTALLED PRIOR TO GRADING OR LAND DISTURBING ACTIVITIES. 7. LANDOWNERS AND/OR CONTRACTORS MUST ENSURE THAT VEHICLES DO NOT TRACK EARTH MATERIALS ONTO STREETS AND MUST IMMEDIATELY COLORADO OIL & GAS (303) 894- 2100 In REMOVE SUCH MATERIALS IF THIS OCCURS. EITHER SWEEPING BY HAND OR THE USE OF STREET SWEEPERS IS ACCEPTABLE. FLUSHING OFF PAVED CONSERVATION COMMISSION SURFACES WITH WATER IS PROHIBITED. x ci Lo 8. ALL LOADS OF CUT AND FILL MATERIAL IMPORTED TO OR EXPORTED FROM THE SITE SHALL BE PROPERLY COVERED TO PREVENT LOSS OF THE x MATERIAL DURING TRANSPORTATION ON PUBUC ROW. �t" c> ENVIRONMENTAL PROTECTION (303) 293-1788 c AGENCY REGION VIII (800) 277-8914 9. THE USE OF DIRT RAMPS IS PROHIBITED. A ROCK PAD ENTRANCE SHOULD BE INSTALLED WHERE CONSTRUCTION VEHICLES NEED TO ENTER OR cc EXIT FROM AN UNPAVED AREA INTO A PAVED ROAD. WCR 18 COOT GLORIA HICE-IDLER 10. LANDOWNERS AND/OR CONTRACTORS ARE RESPONSIBLE FOR CONTROLUNG WASTE SUCH AS DISCARDING BUILDING MATERIALS, CONCRETE TRUCK 1420 2ND STREET WASHOUT, CHEMICALS, LITTER AND SANITARY WASTE, AS APPLICABLE. GREELEY, COLORADO 80631 z (970) 350-2148 11. WASTE COLLECTION AREAS SHOULD BE LOCATED AWAY FROM THE STORM DRAINAGE SYSTEM. CONSIDERATION SHOULD BE GIVEN TO COVERING a WASTE STORAGE DUMPSTERS, TO BE ABLE TO CONTAIN WINDBLOWN MATERIALS. a_ v 12. THE DISCHARGE OF ANY WATER CONTAMINATED BY WASTE PRODUCTS FROM CUTTING OPERATIONS TO THE STORM ATMOS ENERGY JERRY ADAMS Cl) SEWER SYSTEM IS PROHIBITED. ALL STORM SEWER FACIUTIES ADJACENT TO ANY LOCATION WHERE PAVEMENT CUTTING P.O. BOX 1200 OPERATIONS INVOLVING ROAD/CONCRETE CUTTING NEED TO BE PROTECTED. ALL WASTE PRODUCTS GENERATED DURING CUTTING GREELEY, CO. 80631 x o ACTIVITIES MUST BE REMOVED ON A DAILY BASIS. (970) 304-2075 in La 13. WATER USE TO CLEAN CEMENT/CONCRETE TRUCKS SHALL BE DISCHARGED INTO A CONCRETE WASHOUT AREA (CWA). THE PREDEFINED WCR 16 cx CONTAINMENT AREA MUST BE IDENTIFIED WITH A SIGN, AND SHALL ALLOW THE LIQUIDS TO INFILTRATE, EVAPORATE OR DRY OUT. DRIED CONCRETE CENTURYLINK 12680 WCR 58 WASTE SHALL BE REMOVED AND PROPERLY DISPOSED OF. COMMUNICATIONS GREELEY COLORADO 80634 O 14. THE DISCHARGE OF SANITARY WASTE IN THE STORM SEWER SYSTEM IS PROHIBITED. PORTABLE TOILETS MUST BE PLACED ON PERMEABLE (970) 350-2941 __ SURFACES, AWAY FROM THE CURBSIDE AND AWAY FROM STORM INLETS AND/OR DRAINAGE WAYS. o 0 15. SPILL PREVENTION AND CONTAINMENT BMP'S FOR CONSTRUCTION MATERIALS, WASTE AND FUEL MUST BE PROVIDED. SPILLS THAT MAY REACH VICINITY MAP XCEL ENERGY TERRY STENCEL 0 THE STORM SEWER SYSTEM MUST BE REPORTED ACCORDING TO FEDERAL, STATE AND COUNTY REGULATIONS. 1500 6TH AVE in 1 "= 3000' GREELEY CO, 80631 W 16. STORM INLETS WITHIN AND/OR ADJACENT TO THE CONSTRUCTION SITE SHOULD BE PROTECTED. ANY PONDING OF STORMWATER AROUND INLET CONTACT Z PROTECTION MUST NOT CAUSE EXCESSIVE INCONVENIENCE OR DAMAGE TO ADJACENT AREAS OR STRUCTURES. CD co 17. RUNOFF FROM STOCKPILED AREA MUST BE CONTROLLED. SOILS THAT WILL BE STOCKPILED FOR MORE THAN 30 DAYS SHALL BE PROTECTED FROM WIND AND WATER EROSION WITHIN 14 DAYS OF STOCKPILE CONSTRUCTION (MULCH & SEEDING, EROSION CONTROL BLANKETS, ETC). ANY PROPERTY DESCRIPTION : I STOCKPILE LOCATED NEAR A DRAINAGE WAY, MUST BE PROVIDED WITH ADDITIONAL BMPS PROTECTION SUCH AS TEMPORARY DIKES OR SILT FENCE. (f) cc 18. NATURAL VEGETATION SHALL BE PRESERVED AND PROTECTED WHENEVER POSSIBLE. REMOVAL OR DISTURBANCE OF EXISTING VEGETATION SHALL LAND USE: COMMERCIAL/INDUSTRIAL I __ BE UMITED TO THE AREA REQUIRED FOR IMMEDIATE CONSTRUCTION OPERATIONS. DISTURBED AREAS THAT MAY NOT BE AT FINAL GRADE BUT WILL ZONING: AG A I ce REMAIN DORMANT (UNDISTURBED) FOR LONGER THAN 30 DAYS SHOULD BE STABIUZED WITHIN 14 DAYS. LEGAL: SUBDIVISION EXEMPTION NO. 0000- 00-0 $UBX15—OOXX Li Z a3 19. FUGITIVE DUST EMISSIONS RESULTING FROM GRADING ACTIVITIES AND/OR WIND SHALL BE CONTROLLED. 1�1 N CL 20. ALL TEMPORARY EROSION AND SEDIMENT CONTROL MEASURES SHALL BE REMOVED AFTER THE SITE HAS ACHIEVED FINAL STABIUZATION AND WA U 1= o THE PERMIT HAS BEEN INACTIVATED. THE STORMWATER VOLUME CAPACITY OF PONDS MUST BE RESTORED, AND STORM SEWER LINES AND/OR SOIL CLASSIFICATION : > w DRAINAGE INFRASTRUCTURE SHOULD BE CLEANED UPON COMPLETION OF PROJECT. N O 21 . CONDITIONS IN THE FIELD MAY WARRANT EROSION AND SEDIMENT CONTROL MEASURES IN ADDITION TO WHAT IS SHOWN ON THE SWAP AND/OR VALENT SAND, 0 TO 3 PERCENT SLOPES; 74.0% d EROSION CONTROL PLAN. THE LANDOWNER OR CONTRACTOR SHALL IMPLEMENT WHATEVER MEASURES ARE DETERMINED NECESSARY, AS DIRECTED H up BY THE COUNTY. VALENT SAND, 3 TO 9 PERCENT SLOPES; 12. 7% a/ U VONA LOAMY SAND, 0 TO 3 PERCENT SLOPES; 13.2% zo 22. ALL AREAS NOT LANDSCAPED OR COVERED BY OTHER PERMANENT SURFACES SHALL BE RESEEDED PER TABLE RV-10 GRASS SEEDING TABLES cNiBASED ON RANGE SITES FOR SANDY MEADOW AND SANDY PLAINS SITE CONDITIONS, AS CONTAINED IN WELD COUNTY CODE, CHAPTER 8, ARTICLE XI U if) w ,r, - STORM DRAINAGE CRITERIA, DIVISION I - GENERAL PROVISIONS, CHAPTER 12 - REVEGETATION. N 0 <Q \ N in W W „ U o U >-I- In 0 Z 0 O 0 Co 0 o J W CD CD PREPARED UNDER THE DIRECT SUPERVISION OF NH Cn C E PROJECT BENCHMARK: U, PROJECT BENCHMARK BASED ON NAVDBB DATUM o (VERTICAL ELEVATION.• 5024.03' co BENCHMARK: THE SOUTHEAST CORNER OF SECIJON 10, TOWNSHIP 2 NORTH, RANGE 66 WEST 6771 P.M. FOR AND EH BEHALF a BASELINE CORPORATION cu i c INIRAL SUBMITTAL 10/08/2015 r- DRANING SIZE 24" X 36" C D SURVEY ARM SURVEY BALE J EEC 10/2015 JOB NO. 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X w w X X w w w .✓ w w T I .. .v:: .�:::' , �� \ \ V L x LL in / / � ♦ w w W 1 w w w / w , , • i 1 ,, r w w w * w / v• * Q I- 6; � / � ri'#11 -0-," w - w w / �i / w _A Y Y XL- U ''f ,"w, • ///,//// • YY ......:': ri / / / / / 1 X x �X x ))1.r. --X X, , X X X X X � � O ISI \ _ _ _ I„,///JT>"K/I//N. - .......... .. //„±-./ x--x---4. X�-X� mi _ _ G - U \ i \ /' ..... ... x g- n-max x X', ,,"--X / ` 'L. _ x \ - - X - ` < �- V AS AS _ T_, / Nx_ � - L --T- 1 � T _ T - _ 7 - _ - - - _ _ / _ ' .ww:..:::.. [ _ T - - �f S � l .� /•:YY�I:.:.:.1��"..�...'.�C.4M1:.�:.0.:'.':::':.. \. /fI �Y_ T 1 7—� T T-_----- / - / / / / (.&'S �re / V .- _�- - S - - -,- . _ � - - - T - - - T = �: - - T , , 656.00 � _ - _ � - - � - - - - n - - - ;�- - - -�- - -r— r - - � �� -F — o I › PROJECT BENCHMARK .. . . ..c_ . I < < / S 89'17 24 W 973.34 1 I I I D SEC. 10, T2N, R66W 0 \ // / I S 89'1725' W ` / \ , cn — SOUTHEAST CORNER • PREPARED UNDER THE DIRECT \ \ I _ _ _ — — __ — — — — — — — — — — — FOUND 2-1/2 ALUM. CAP SUPERVISION E N MARKED "LS 19585, 1sss• LINE LEGEND SYMBOL LEGENDOF N MNR EXIST. CONTOUR (1 ') ' - - - - 4. - MJR EXIST. CONTOUR (5') RECYCLED ASPHALT I 1 OVERALL GRADING AND EROSION CONTROL PLAN MNR PROP. CONTOUR (1 ') z C2 I C2 MJR • zPROP. CONTOUR (5') GRAVEL I cn PROJECT QUANTUM-5: PROJECT QUANTTTES CONTINUED: 1 EDGE OF ASPHALT w w w w NATIVE SEED MIX SUBJECT PROPERTY LINE w w FOR AND EN &HM ' DISTURBED AREA: 4.53 AC GRAVEL CLASS 5 BASE AREA: 3.44 AC - - EASEMENT DRAINAGE FLOW ARROW BASELWE 00RP10/08/ CUT VOLUME. 2,087 CY GRAVEL CLASS 5 BASE IMPORT VOLUME (at 0.5' NO: 2, 779 CY SEDIMENT CONTROL LOG SCL INITIAL SUBMITTAL 10 06 2015 TILL VOLUME. 7,480 CY T EXISTING UNDERGROUND TELEPHONE � DRAxiNc SIZE 24" x 36" h7DNET FILL VOLUME. 5,393 CY TOPSOIL REMOVAL AREA: 4.53 AC OMITS OF CONSTRUCTION ` " • • CONCRETE PAVNG LOC - - EXISTING RIGHT OF WAY ... ' : ;. .'. . DSURVEYRANIN FIRM SURVEY DATE u TOPSOIL VOLUME (at 0.5' fill): 639 CY TOPSOIL REMOVAL VOLUME (at 0.5'cut): 3,657 CY -' 10/2015 0GAS GAS EXISTING GAS PIPELINE JOB Na PL317 CLASS 5 BASE VOLUME (at 0.5' fill): 2,779 CY TOPSOIL BERM VOLUME: 3,018 CY VEHICLE TRACKING CONTROL VTC GRAPHIC SCALE TOPSOIL LANDSCAPE VOLUME. 639 CY —x x x x- -CRANING Certarus NAME TOTAL DIRT IMPORT/EXPORT VOLUME.• 1,975 CY TOTAL TOPSOIL EXPORT VOLUME.• 0 CY EXISTING CHAIN LINK FENCE 50 0 50 100 317 CNG CiviLdwg CILIA PROPOSED CHAIN LINK FENCE I--I I--I I--I SHEET 2 a 5 Q o 0 0 0_I CONCRETE WASHOUT AREA EL - - - - - - - - - - - - - DRAINAGE BASIN BOUNDRY (IN FEET) 1 INCH = 50 FT C2 CERTARUS LTD. __ __ =_ VEHICLE TRACKING CONTROL EROSION AND SEDIMENT CONTROL PLAN GENERAL NOTES: " o 0 USR15 0077 1 . THE DISTURBANCE AREA FOR THE PROJECT IS GREATER THAN ONE ACRE; THEREFORE, = o co _ A STATE OF COLORADO CONSTRUCTION STORMWATER DISCHARGE PERMIT IS TO BE OBTAINED BY CONTRACTOR. c o - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - R/w - - - - - - - - - - SOUTHEAST 1/4 OF SECTION 10, T2N, R66W, 6TH PAL, 1 0- o __ 2. THE CONTRACTOR IS RESPONSIBLE FOR IMPLEMENTING AND MAINTAINING EROSION AND c: COUNTY OF WELD, STATE OF COLORADO SEDIMENT CONTROL MEASURES AT M DURING CONSTRUCTION. STORMWATER MANAGEMENT PLANS MAYBE MODIFIED WITH APPROPRIATE APPRO APPROVALS FROM THE •= a ER EROSION CONTROL DETAILS ENGINEER, AND MAY REQUIRE ADDITIONAL MEASURES AS FIELD CONDITIONS WARRANT. La 43, 61 3. A THOROUGH INSPECTION OF THE STORMWATER MANAGEMENT PLAN BEST MANAGEMENT c I_ M HARD SURFACED (Asphalt) PRACTICES (BMP'S) SHALL BE PERFORMED EVERY FOURTEEN (14) CALENDAR DAYS AND Lo AFTER ANY PRECIPITATION OR SNOWMELT EVENT. PERIODIC INSPECTIONS SHALL ALSO C13 • INCLUDE INSPECTING EQUIPMENT FOR LEAKS AND REVIEWING EQUIPMENT MAINTENANCE o co PUBLIC ROAD PRACTICE. ALL INSPECTIONS AND MAINTENANCE SHALL BE DOCUMENTED BY THE PROJECT o CT ' EROSION CONTROL SUPERVISOR AND MADE AVAILABLE TO THE ENGINEER UPON REQUEST. M cc`LC)0 0 ANY EROSION CONTROL BMP'S THAT HAS BEEN COMPROMISED OR HAS BEEN DISTURBED 0) crj o - 15" CULVERT SHALL BE REPLACED OR RECONSTRUCTED. IT IS THE RESPONSIBILITY OF THE CONTRACTOR C' MINIMUM IF TO HAVE ALL EROSION CONTROL BMP'S IN PLACE AND EFFECTIVE PRIOR TO A STORM 45' - 60' J REQUIRED EVENT. RECYCLED ASPHALT RADIUS NOTES DITCH - -- - -0 0 - ` - FLOWLINE 1. EROSION LOGS SHALL BE EISEDDED 2 INCHES INTO THE SOIL. 4. THE STORMWATER MANAGEMENT PLAN LOG BOOK SHALL BE UPDATED EVERY FOURTEEN A A 2. STAKES SHALL BE EMBEDDED TO A MINIMUM DEPTH OF I2 INCHES. (14) DAYS. THIS LOG SHALL REMAIN ON SITE AVAILABLE FOR REVIEW BY THE ENGINEER 3. EROSION LOGS SHALL BE TIGHTLY ABUHED WITH NO GAPS. UPON REQUEST. MAINTENANCE ACTIVITIES TO CORRECT PROBLEMS NOTED DURING USE TWO WOOD STAKES AT ALL r ' ° INSPECTIONS MUST BE DOCUMENTED AND KEPT IN THE STORMWATER MANAGEMENT PLAN is � r \\\/ EROSION LOG ENDS OR JOINTS � LOG BOOK. B i Z 3 �Sz r I //\/ USE A STAKE EVERY 24" o G ~ ~ U AND CONTINUE ALTERNATE J B , 5. ALL CONSTRUCTION SITE OPERATORS SHALL CONTROL WASTE SUCH AS DISCARDED DOUBLE L. __ �/ ORIENTATION THROUGHOUT B 1 ° CATTLE a '; f / THE LENGTH OF THE EROSION LOc BUILDING MATERIALS, CONCRETE TRUCK WASHOUT, HAZARDOUS CHEMICALS (TO INCLUDE GUARDS - '� ° fl.D� _.*FLOW POINT B i/\ BUT NOT LIMITED TO HEAVY EQUIPMENT MAINTENANCE FLUIDS, MOTOR OIL, ANTIFREEZE ' z ?li BOSTON DG POINT A P° " A AND VEHICLE FUEL), LITTER, AND SANITARY WASTE AT THE CONSTRUCTION SITE THAT MAY >- ; m . CAUSE ADVERSE IMPACTS TO STORMWATER QUAUTY. a 0 IX 6 " MIN 7 6. ALL POTENTIAL POLLUTION SOURCES ON-SITE SHALL BE IDENTIFIED AND CONTROL MEASURES INSTALLED AND PRACTICED TO MINIMIZE THE LIKELIHOOD OF A RELEASE. >- RECYCLED ASPHALT 7. ALL PORTABLE TOILET FACILITIES SHALL BE LOCATED AWAY FROM GUTTERS, INLETS, o w DITCHES, DRAINAGEWAYS, RECEIVING WATERS AND AREAS SUSCEPTIBLE TO FLOODING OR a DAMAGE BY CONSTRUCTION EQUIPMENT. 0- 1 cc - 8. ALL PORTABLE TOILET FACILITIES SHALL BE SECURED IN PLACE BY STAKES INTO THE a GROUND TO PREVENT TIPPING. NOTE: 12" COVER OVER CULVERT ` - • , OR PER MANUFACTURER • GRAVEL . 9. STOCKPILES INCLUDING LANDSCAPING MATERIALS, EARTH MATERIALS AND DIRT FROM RECOMMENDATIONS. " ` GRADING OR EXCAVATION SHALL NOT BE LOCATED ADJACENT TO WATERWAYS. • 100' RECYCLED ASPHALT WITH 10. ALL MATERIAL IMPORTED TO OR EXPORTED FROM THE SITE SHALL BE PROPERLY DOUBLE CATTLE GUARDS . COVERED TO PREVENT THE LOSS OF MATERIAL DURING TRANSPORT. HAUL ROUTES MUST BE PRE-APPROVED BY THE COUNTY. NO MATERIAL SHALL BE TRANSPORTED TO ANOTHER SITE WITHOUT FIRST OBTAINING A HAULING PERMIT FROM THE COUNTY. f ` , WELD DCOUNTY I ` V\ Ail PUBLIC WORKS DEPARTMENT PREFERRED OPTIONS z VLiDc SCALE: k NOT TO SCALE k`eiE' a_ COLORADO DATE: SHEET: C AUGUST 2011 1 of 3 ttNN N LU 0 PERFORMANCE STANDARD NOTES: zo 1 . TEMPORARY EROSION CONTROL FACILITIES AND/OR PERMANENT FACILITIES INTENDED TO CONTROL EROSION OF AN EARTH DISTURBANCE OPERATION SHALL BE INSTALLED BEFORE La 1 PERMANENT VEHICLE TRACKING CONTROL (VTC) ANY EARTH DISTURBANCE OPERATIONS TAKE PLACE. C2 C3 NOT TO SCALE 2. EARTH DISTURBANCES SHALL BE CONDUCTED IN SUCH A MANNER SO AS TO o EFFECTIVELY REDUCE ACCELERATED SOIL EROSION AND RESULTING SEDIMENTATION. r,- 4 EROSION LOG DETAIL 1 of 2 0 3. PERSONS ENGAGED IN EARTH DISTURBANCES SHALL DESIGN, IMPLEMENT, AND MAINTAIN o 6" CLASS 5 ROAD BASE COMPACTED TO 95% DENSITY C2 I C3 ACCEPTABLE SOIL EROSION AND SEDIMENTATION CONTROL MEASURES, IN CONFORMANCE c> WITH THE EROSION CONTROL TECHNICAL STANDARDS ADOPTED BY WELD COUNTY. i- 3 4. EARTH DISTURBANCES SHALL BE DESIGNED, CONSTRUCTED AND COMPLETED IN SUCH A z MANNER SO THAT THE EXPOSED AREA OF ANY DISTURBED LAND SHALL BE LIMI-ED TO o Z THE SHORTEST POSSIBLE PERIOD OF TIME. L41 I ' 5. SEDIMENT CAUSED BY ACCELERATED SOIL EROSION SHALL BE REMOVED FROM RUNOFF Q ��\ WATER BEFORE IT LEAVES THE SITE OF THE EARTH DISTURBANCE. Cn ce l EROSION LOGS ABUTTED BETIGHTLY \ \ \ \\ WITH NO GAPS (TYP.) \ CONVEYANCE OF WATER AROUND, THROUGH, OR FROM THE EARTH DISTURBANCE AREA p J Ot J \ \ SHALL BE DESIGNED TO LIMIT THE WATER FLOW TO A NON-EROSIVE VELOCITY. LL z Q SCARIFY MIN. 8w OF SUBGRADE, ADJUSTED IN MOISTURE CONTENT _ i- .T' AS NEEDED AND COMPACT TO 95% DENSITY PRIOR TO PLACEMENT 7. RECORDS OF SPILLS, LEAKS, OR OVERFLOWS THAT RESULT IN THE DISCHARGE OF I"� CD N o OF ROAD BASE. Zvi B ` �' B POLLUTANTS MUST BE DOCUMENTED AND MAINTAINED. SOME SPILLS MAY NEED TO BE z CL J \ q �� REPORTED TO THE DIVISION IMMEDIATELY: SPECIFICALLY, A RELEASE OF ANY CHEMICAL, I CD N 0 9 FLOW OIL, PETROLEUM PRODUCT, SEWAGE, ETC., WHICH MAY ENTER WATERS OF THE STATE, F+ Z i- Lt 2 ! - MUST BE REPORTED. MORE GUIDANCE IS AVAILABLE ON THE WEB AT N Z CLASS 5 BASE - pr�� WWW.CDPHE.STATE.CO.US/EMP/SPILLSANDRELEASED.HTM. THE DIVISION'S TOLL FREE N o O cIC) CROSS SECTION p % �. i �` J 24-HOUR ENVIRONMENTAL EMERGENCY SPILL REPORTING LINE IS 1 .877.518.5608. ALSO aZv�i,%/////////////%%//////%//////////%� ..rte ��,. IMMEDIATELY CALL THE ENGINEER - TODD RAND AT 970.353.7600 AND WELD COUNTY - E o p JOSH HOLBROOK AT 970.301 .2622. zo o CONCRETE WASHOUT V Ls.' ' + .�sIGN EROSION LUG BMP MAINTENANCE NOTES: (/) L.0 cr, ISOMETRIC VIEW PLAN VIEW o �/ . �` 1 . IT IS ANTICIPATED THAT THE BMP'S IMPLEMENTED AT THE SITE IMLL HAVE TO BE _t aow MODIFIED TO ADAPT TO CHANGING CONDITIONS OR TO ENSURE THAT POTENTIAL \ N \ 1 ;1 o MIN. �� ` v STAKES %rA POLLUTANTS ARE BEING PROPERLY MANAGED AT THE SITE. WHEN BMP'S ARE MODIFIED ' , vN ,. " .» . \ \/\ F APPROXIMATELY 90° ' I- ,' + + tom, Si z. NW. `` ,„ TO EACH OTHER THE SWMP MUST BE MODIFIED TO ACCURATELY REFLECT THE ACTUAL FIELD CONDITIONS. fY to 3 e T� APIA L140 r te .. �-Y : - \� , / RYPJTh. S CTION R-R W W 2, 3.1 B X 8 MIN. = ` , - " t., VEHICLE TRACKING \ ,\j `� 2. THE OWNER/CONTRACTOR SHALL CONTINUOUSLY MAINTAIN ALL SILT FENCING SO THAT OF m J 1 ,.�' - c * h -' fill. CONTROL (SEE /\ / O� N9 EROSION LOG CULVERT INLET PROTECTION P/ � IT FUNCTIONS PROPERLY DURING CONSTRUCTION AND WORK SUSPENSIONS. ALL SILT - , ,j:..- VTC DETAIL) OR /,/,� /.fE FENCING SHALL BE REMOVED BY THE CONTRACTOR UPON SUBSTANTIAL PERMANENT > o R `. -. _ OTHER STABLE �Y\y'\✓�'�\//\\�\�\S,, \//\/K//\�� ;\ J l- (/7 SURFACE / \/ / STABIUZATION UNLESS OTHERWISE DIRECTED BY THE ENGINEER. z Cn / 3; 1 'la ` ' 5• TO10• 3. ALL INLET/OUTLET PROTECTIONS WILL BE CHECKED FOR MAINTENANCE AND FAILURE- oc> n . , f" �+ SEDIMENT SHALL BE REMOVED AND PROPERLY DISPOSED OF ONCE IT HAS ACCUMULATED cm 'oz . -- 1 � �. SECTION A-A TO HALF THE DESIGN OF THE TRAP. w D - I- 25 MIN. M NOTES: _ EROSION LOGS USED Al TOE O SLOPE SHALL BE PLACED 5 TO 10FEET ,- -- 4. ALL SPILLS SHALL BE CLEANED UP IMMEDIATELY AFTER DISCOVERY, OR CONTAINED PREPARED UNDER THE DIRECT CONCRETE WASHOUT AREA PLAN BEYOND TOE of SLOPE TO PROVIDE STORAGE CE PLAC. •.�, H 12. TYP. COMPACTED BERM AROUND 2. EROSION LOGS SHALL BE PLACED ON TIE CONTOUR WITH ENDS FLARED FLOW , UNTIL APPROPRIATE CLEANUP METHODS CAN BE EMPLOYED. MANUFACTURE'S SUPERNSION OF 1THE PERIMETER P SLOPE. �� RECOMMENDED METHODS FOR SPILL CLEANUP SHALL BE FOLLOWED, ALONG WITH PROPER cn 11cn y4 2% SLOPE DISPOSAL METHODS. 4 EROSION LOG TOE OF SLOPE PROTECTION / I ` II-_ 13' MIN. I1 UNDISTURBED OR 23 r >3 I V) COMPACTED SOIL VEHICLE TRACKING B X 8 MN. I CONTROL (SEE VEC - EROSION LOG APPLICATIONS EROSION LOG CULVERT OUTLET PROTECTION I SECTION A DETAIL J Computer File Information Sheet Revisions TEMPORARY Creation Date: 07/04/12 Initials: DD Date: Comments Colorado Department ns Transportation STANDARD PLAN NO. w D4201enver, East Arkansas Avenue CWA- 1 CONCRETE WASHOUT AREA Last Modification Dote: 07/04/12 Initials: LTA regal Denve: (303rado 80222 EROSION CONTROL TA O ' FuIlPoth:www.caloratlodo[.info/business/tlesignsupport Q ---.— Fox: 303) 757-9083 M-208- 1 FOR AND ON BEHALF OF infMrTIMATIAIT (303) 757-9820 Drawing File Name: 2080103012.dgn BASELINE CORPORATION taj cvvCAD Vee Microstotian VB sane: Not to sane Uniis: Erglish RFT) Project Development Branch DD/LTA Issued By: Project Development Branch on July 4, 2012 Sheet No. 3 of 12 INITIAL SUBMITTAL 10/OB/2015 CONCRETE WASHOUT AREA DRA LNG SZE 24" X 36" C9 cd �1 SURVEY CVEY FIRM SURVEYL 5 ATE J PL317 0 NOTES: 5 EROSION LOG DETAIL 2 OF 2 DRANING NAME 2 (.2 C3317 Certorus CNG Clvil.dwg Q 1 . LOCATION TO BE DETERMINED BY CONTRACTORSHEET 3 OF 4 EL CS CERTARUS LTD. _ USR15-0077 ==== . 0 CI a o - SOUTHEAST 1/4 OF SECTION 10, T2N, R66W, 6TH P.M., o i COUNTY OF WELD, STATE OF COLORADO c W DRAINAGE DETAILS = 8 I U W M LLJ u.iul co • cc co CD a) h of O CO TRASH RACK, LCCKABLE G A\D REMOVABLE TOP OF 3ERM ELEV = 5000.95 V100—yr = 4999. 93 4 j SPILLWAY ELEV =4999 ra 0— yr GRATE = 4999.33 \ • a 8" WIDE CONC._r. 6 e L • C� C� �S CUTOFF WALL a �I P g l- g l- WQCV ELEV = 4799:11 . dok U .S. Filter Stainless Steel Vtell—Screen* o 5' - 5' 18. 0 5' 5' (or equal) w 73. 3 LF of 15" CMP @ 0.65°1 o 4.0' - IA \- STEEL RESTRICTOR PLATE EROSIO\ CO\TROL ----Rs' 100-YP TOP OF BERM ELEV= 5000.93 ANLET AT SIDE SLOPES +, HCL INV. NV. = 499 .Oo 5000 m —I — T FINISH GRADE r - - T - - T 3OTTOM ELEV = 4998 . 4 • z - - - - ,r U WS La a • 1 .. CC I I I I SPILLWAY ELEV= 4999.93 I I I INV. = 4ThSs41 � � .�'' W 1 - - 1 - - 1 - - 1 - - � - - — — — - - — — — — — 1 - - 1 - - 1 . . �` � I I I + — + — + — t — t — t — rt — _k — _k — C8x18.75 American �� La a I I I I I I I I I I I I I s" covcRLIE BOTTOM Standard Structural � TYPE L RIPRAP I I I I I I I I } I I I I I I I I I Steel Channel Formed Section A A L - - L - - L - - L - - L - - i_ - - 4_ - - i_ - - - - _k - - 4_ - - _k _� _ .k - - _L - - .L - - L - - L - - 1 Into Concrete =ottom � sTEEL REsrelero\ PLATE �,. ' " And Sides Of 6" wide Well—Screen Frame 77.... � : ., . I I I I I I I I I I I I I I I I I «l I I I I I I I I I I I I I I I I I I concrete opening . Attached To Channel _ Trash Rack Attached 3y Intermittent Nelds 1...--I 1 - - 1 - - 1 - - 1 - - 1 - - I - - I - - � - - _L - _s - - _1 - - _s - f _1 - - _I A - - _I - - _I - - _L Ey Intermittent Welds. #4 REINF. @ 18" O.C. 1---1-1 0ENTRALLY PLACED / . ‘..-----....---tel15- CMP Restrictor Plate Add Hot Dipped Galvanized Steel Perforated Water Quality Flow Control Hate. Seal all Edges with a Gasket or Silicone Caulk -each 6" Co\C. WALL • •' • 4.a' TRASH RACK, #4 3ARS © 12" oC a LOCKABLE & REMOVA3LE EACH WAY82 OUTLET WEIR • U) W `2� NOT TO SCALE • .. . . ,,,,,,,,,u,,,,,,,�,..,,,,,,,,,,,,,,,,,,,,, ,, • o D a ' 1 % r D p ..: ..' C • • • •• . .. � I■■■■■■■■■■■■■■ 0 RASH RACK Trash Rack Attached 6" OPENING I■■■■■■■■■■■■■■ By Intermittent I■■■■■■■■■■■■■r A M Welding All Around I■■■■■■■■■■■■■■ Flow ® I■■■■■■■■■■■■■■ Section B-B - Plan View I■■■■■■■■■■■■■■ ' ' % o ■■■■■■■■■■■■■■ Q WG ORIFICE PLATE I■■■■■■■■■■■■■■ 4 DC ■■■■■■■■■■■■■■ : W PLATE = ,, :. • o I■■■■■■■■■■■■■■ . 0 CS W CONC = . " •'. I■■■■■■■■■■■■■■ i— LO GRATE=4999.33 WQCV=4799.11 ; 4.0' Z Eleruftw C co 0 o BOLTS 3.75" MAX SPACING Stainless Steel o Support 3ars V -CC Z 1 COLUM \ OF (3) 1 . 00" HOLES © 4"0C o. 93 Stainless Steel (U .S. Filter* 4 < : , or Equal) Nlres J Q J Er o rE� t,t L,_ z 3OTTOM HOLE = 4998. 40 1 • • • • , 1-1 U N in a I I A ` • ` ' :: 3OTTOM 3'0X = 4998. 15 0.139'-I- 1 ••:Tc . . ..A0.090" z = Lu Section D-D Section C-C S N Cp NE- z_ o_ o O Q o ISi U o N U o F ( w 5 = N N 2 OUTLET STRUCTURE Q C2 C4 ~ I— � In w U � r o= ti Ci a) v r PREPARED UNDER THE DIRECT SUPERVISION OF NH c I I O Bi CD CO o FOR AND ON BEHALF Cc BASELINE OORPORAIION ai c INIRAL SUBMITTAL 10/08/2015 r DRANINO SZE 24" X 36" r / SURVEY FIRM SURVEY BALE J EEC 10/2015 KM NO. PL317 o --- DRAVANO NAME 7 317 Certarus CNG CiviLdwg Q SHEET 4 cc 4 cB C4 CERTARUS LTD. Liu .c7). ... USR15-0077 ==_ CO CD .a o � SOUTHEAST 1/4 OF SECTION 10, T2N, R66W, 6TH PAL, ® i = z co COUNTY OF WELD, STATE OF COLORADO CI DRAINAGE PLAN a 0 I 4 _ _ _ _ � cas � c �° �—_ cl ea as 1 ii / — - - - micass'� tas � ----" — _ GAS ¢ co.--- .--.\--11:::/I I + - _�� - _ h 0 CO LA-CD Cr)C1) 1 1 I / / _ _ _ S 82'55'08" I I i / / �� CO E I I / /,+ s a cd i � � \ 661 .87 I I // i 9s N \ \ � � . � � � \ \ \ \ \ \ N / \ n 9s N N N -7,p \ \ \ 1 \ \ N N \ N. \ \ 1 \ ) I \\ \ \ \ (� I f C7c1-)\ \ j / � � � \oC90) \ a \ I w >- / / \\ \\ Y � I w V A m S. I 1 \ i \� \� \ I i \ Er 1 a >:\ cc Iy _II.__r_ ___.. w \ h al 1 1 w / S°04$ ‘ b) at \ / I II II jk * ifit) CsiCna:11— :5 \ �/ � / / / I 1 I • . w I 1 / / / ooh 1 1 I 2 \ DESIGN POINT DESIGNATION o F ;L / / `` 7. 09, / I I x \ z 00.11. i � � � � oy / /i / / / 1 \ \ �'� N i � ...... ...... ...... ":: : `� o% ade // // / / 'I W N \ N A cc A = BASIN DESIGNATION ' 1 1 0% / / / C \ \ y . B = BASIN AREA (ACRES) o i ......_ : ......-- 1 .' % O G v C- FACTOR / 3 p 1 TD ID - . � ° \ C = DEVELOPED 1001I Mill D D = DELOPED10C-FACTORR• ►h° TT \ Al iH1 r \\ r \ - La \ \ \ O \ , W w w / 3.31 0.0.41 \ \ � ,\ 3.31 0.02 tk \ et 7.09 + \\ \ z ` \ ::/ \ \ LINE LEGEND Q \ \ \ N \ ` \ \ \ \ MNR EXIST. CONTOUR (1 ') o r \ \ rz \\ \\ �' r ww I ; ' \1 \ \ "� ` wf \ 1 .7% ` \ O , \ \ — — — — — MJR EXIST. CONTOUR (5') ov- - - / % v ' - r \ I 1 .0 0o ? I �\ \ \ \ X' MNR PROP. CONTOUR (1 ') (I)/ / 7 p9% \ I I \ \ max_ MJR PROP. 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X T X X Xr X X XX \X X X X X X-c - 11 - X X 'Xelk mW '� �' _ - X X X \ X X-�t-�X - .1L-Tc"- - - T Jr.- r- - M7 - - - - - - - - - � � . . . . . . . . . . . . 65 - - L — — ₹- - - - - - - / - - - - - ' PREPARED E ECT - - - - �r / ARED UNDER THE DBt........ .+1.-- --: T ---- - - -+ Lu - - - - - - - - - - - - - - - - - - - - 5005 _ - -r - - - - - _ _ $ - - T - - - T - _ - ?_ - - ' 6.00' S 89'17'25" W / A \ S 89'17'24" W 973.34' / / I JI COUNTY ROAD 22 / 1 \ 1 v v - - - - FOR AND ON BEHM OF cu BASELINE CORPORATOR cai INIRAL SUBMITTAL 10/08/2015 RUNOFF SUMMARY DRANINGSIZE 24' X36' SURVEY FIRM SURVEY BALE BASIN AREA 10 - YR 100 - YR OGRAPHIC SCALE 80 JOB NO. PL317 C SEECURVEY 10/20,5 40 HISTORIC 3 . 31 ACRES 0 . 90 CFS 4. 53 CFS II II EL (IN FEET) JTRAVERS NAME 3 NO.Cer NG CiviLdwg DEVELOPED 3 . 31 ACRES 3 . 92 CFS 8 . 25 CFS 1 INCH = 40 FT SHEET 5 OF 5 C5 Hello