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Home My WebLink About20090946.tiffLegal Description 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 0 9 0 3 _ _ 0_ 0 o _ 0 3 (12 digit number - found on Tax I.D. information, obtainable at the Weld County Assessor's Office, or www.co.weld.co.us.) S eJ+kkSi A S (44->a 't"+ , Section le, Township 0 North, Range LC West Flood Plain: — Zone District:riq✓ier t, Total Acreage: Geological Hazard: , AirportOverlayDistrict: FEE OWNER(S) OF THE PROPERTY: Name: tC 1? I'kkt Afet , L, e, Work Phone #303-595 33 3 t Home Phone # — Email — Address: 3 -to lZ Shred Suit_ 15 00 Address: 0 , Overlay District: City/State/Zip Code (eKAA/et- i CC $oZ 02_ 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 '!AUTHORI ED A9ENT (See Below: Authorization must accompany applications signed by Authorized Agent) Name: 'int' q ICWItnt� Work Phone #110-3.113 63MS Home Phone # Email ;scuci+iNSk�6 dc��fcf r }et...c ow Address: k D 2 t-1 IV o r`f t, 11‘ Address: --- City/State/Zip Code t' r e e key / CC 0 6 3 ( PROPOSED USE: Ekporn510u! b"C 'CXiS4 ;II uSlIk-55Z I (We) hereby depose and state under penalties of perjury that all statements, proposals, and/or plans submitted with or contained within the application are true and correct to the best of my (our)knowledge. Signatures of all fee owners of property must sign this application. If an Authorized Agent signs, a letter of authorization from all fee owners must be included with the application. If a corporation is the fee owner, notarized evidence must be included indicating that the signatory has to legal authority to sign for the corporation. EXHIBIT //-3-ot uthorized Agent Date Signature: Owner or Authorized Agent 2009-0946 FOR COMMERCIAL SITES, PLEASE COMPLETE THE FOLLOWING INFORMATION • • • BUSINESS EMERGENCY INFORMATION: Business Name: D C ? M ;4s f { Address: 3 I M et S '..} C V` Ll 3 Business Owner: Home Address: p C ? (t t re c "A t3?LI Nor4L 1+`'t4eKve Phone: 9?QS31°11 City, ST, Zip: C ,r e ett'1, C a P o63 / Phone: 9(? ©— 3 S ` 7200 — City, ST, Zip: 6 J'L° L' lC`� c O €3063/ List three persons in the order to be called in the event of an emergency: NAME TITLE ADDRESS PHONE Toe K„Liyistc-SrKirnr td;«c4o1- t3aq ?it' 9 2d - 378 -6,-/S Q's5 Tr'C- treotI &ar^.4ger- t3zt(N�`' �?7?o- Sit- 180O C Lctc ix- F cl t47 S,1rrViSor- 132'{ N,? 97c-S3I-t 553 L Business Hours: Days: Type of Alarm: Burglar j- Holdup(— Fire fl Silent[ Audible Name and address of Alarm Company: Location of Safe: *********************************************************************************************************************************** MISCELLANEOUS INFORMATION: Number of entry/exit doors in this building: `t Sou 1l.& 0 k Location(s): v\or ).t si C -ter e aS TSiC-te Is alcohol stored in building? /VC Location(s): Are drugs stored in building? NU Location(s): Are weapons stored in building? Al`-' Location(s): The following programs are offered as a public service of the Weld County Sheriffs Office. Please indicate the programs of interest. V� Physical Security Check Crime Prevention Presentation UTILITY SHUT OFF LOCATIONS: Main Electrical: Gas Shut Off: MCC ti4 Exterior Water Shutoff: Interior Water Shutoff: _ re) Ove*--A. v�atr et-ifOT e$��C reSAroov*, -12- ajar Midstream,_ November 3, 2008 Weld County Building Department 918 10th Street Greeley, CO 80631 RE: DCP Midstream / USR-552 DCP Midstream welcomes this opportunity to submit information concerning its proposed plans to expand the existing Lucerne Gas Plant. This additional equipment will be used for processing the increased amount of well head gas in Weld County. The location of this additional equipment is highlighted on the enclosed building plans, and a brief narrative explaining the proposed project is attached. Thank you for your consideration, and I look forward to hearing from you. For any additional questions or information needed, please contact me at 970-539-1908. • Respectfully submitted, Paul D. Park DCP Midstream Project Manager • Identify Results • • Page 1 of 3 OA ccount#: R1276286 WELD COUNTY ASSESSOR PROPERTY PROFILE Tax Area: 0606 Bordering County: Acres: 77 Township Range Section Quart. Sec. 06-65-28-0 Owners Name & Address: BARANWAY JOHN B (1/3 INT) & 1236 CORNELL DR LONGMONT, CO 80503 Additional Owners: BARANWAY PHYLLIS K (1/3 INT) & BARANWAY JOHN DOUGLAS (1/3 INT) Business/Complex: Sale Date 2/14/2003 Sale Price $765,000 Sales Summary Deed Type WD Legal Description Parcel#: 080328000037 Subdivison Name Block# Lot# Property Address: Street: 31267 43 CR City: WELD Reception # 3037401 13796 E2SE4 28 6 65 (3R) SITUS: 31267 43 CR WELD 80631 • Land Type Commercial Agricultural Agricultural Land Subtotal: Bldg# 1 2 3 Abst Code 4180 4117 4117 Property Type Residential Out Building Out Building Improvements Subtotal: Total Property Value Land Valuation Summary Unit of Number of Measure Units Acres 3 Acres 42.69 Acres 31.31 77 Buildings Valuation Summary Actual Value $37,681 Actual Value Assessed Value $10,930 Assessed Value $179,292 $16,830 $216,973 $27,760 Building Details Account#: R1276286 Parcel#: 080328000037 Owners Name & Address: BARANWAY JOHN B (1/3 INT) & •1236 CORNELL DR LONGMONT, CO 80503 Property Address: Street: 31267 43 CR City: WELD http://maps2.merrick.com/Website/Weld/setSgl.asp?cmd=QUERY&DET=PP&pi... 11/05/2008 Identify Results Page 2 of 3 Building# 1 Built As: Exterior: Interior Finish: # of Baths: # of Bdrms: # of Stories: Rooms: Garage: Attached SQ Ft: Basement:. Total SQ Ft: Property Type Residential 2 Story Frame Hardboard Plaster 2 2 Individual Built As Detail Year Built: HVAC: Built As SQ Ft: Roof Type: Roof Cover: 1931 Forced Air 2140 Composition Shingle Units: 0 Detached SQ Ft: Finished SQ Ft: Account#: R1276286 Parcel#: 080328000037 Owners Name & Address: BARANWAY JOHN B (1/3 INT) & 1236 CORNELL DR LONGMONT, CO 80503 Building# 2 Built As: Exterior: Interior Finish: # of Baths: # of Bdrms: # of Stories: Rooms: Garage: Attached SQ Ft: Basement: Total SQ Ft: Property Address: Street: 31267 43 CR City: WELD Property Type Out Building Individual Built As Detail Shed - Utility Year Built: HVAC: 0 0 0 0 Built As SQ Ft: Roof Type: Roof Cover: 0 None 1 Units: 0 Detached SQ Ft: Finished SQ Ft: Account#: R1276286 Parcel#: 080328000037 Owners Name & Address: BARANWAY JOHN B (1/3 INT) & 1236 CORNELL DR LONGMONT, CO 80503 Bu ildinp# 3 Built As: Exterior: Interior Finish: # of Baths: # of Bdrms: •# of Stories: Rooms: Property Address: Street: 31267 43 CR City: WELD Property Type Out Building Individual Built As Detail Shed - Utility Year Built: HVAC: 0 0 0 0 Built As SQ Ft: Roof Type: Roof Cover: 1972 None 1 Units: 0 http://maps2.merrick.com/Website/Weld/setSgl.asp?cmd=QUERY&DET=PP&pi... 11/05/2008 Identify Results Page 3 of 3 Garage: Attached SQ Ft: Basement: Total SQ Ft: Detached SQ Ft: Finished SQ Ft http://maps2. merrick.com/Website/Weld/setSq I.asp?cmd=QUERY&DET=PP&pi... 11/05/2008 • • • Responses to Questionnaire Lucerne Plant Expansion 1. The proposed use of the property: DCP Midstream would like to expand its existing gas processing facility on the property. The equipment includes compressors associated with gas processing and other equipment to allow gas produced in Weld County to be transported to market and sold. 2. Consistency with Weld Comprehensive Plan: The proposed use is consistent with the Comprehensive Plan because it seeks to use the land to foster the development of the vast natural resources in Weld County. Moreover, given the property's size, the impact on agriculture will be minimal. 3. Consistency with the Intent of the Weld County Zoning Ordinance and the zone district: The proposed use is consistent with the intent of the Agricultural Zone District, as it will foster the development of oil and gas resources, and Section 31.2 of the Weld County Ordinance provides that oil and gas production facilities are allowed as a matter of right in the Agricultural Zone District. Further, it will not interfere with any agricultural operations. 4. Surrounding Uses: The site is surrounded by agricultural uses. 5. Details regarding use: a. Number of people at site? Two to three people will use site. b. Number of employees at site? One operator and one mechanic. c. Hours of operation? 24 d. Structures to be erected? Approximately 6 metal buildings. e. Animals? None f. Vehicles (type, size, weight) to access site? Pickup truck for employees and 2 semi's for condensate. g. Fire Protection? Union Colony h. Water source? North Weld County Water District i. Sewage? Septic, existing. j. Storage or warehousing? None • • • 6. Landscaping: Landscaping is not proposed at this time. 7. Reclamation: No reclamation procedures will be necessary. 8. Storm water drainage. Storm water will be collected at the south east corner of the facility. 9. Time frame for construction: DCP Midstream would like to begin construction as soon as possible, December, 2008 or January, 2009 with completion around July, 2009. 10. Storage of wastes: No storage will occur, all wastes will be removed from site in a timely manner by an appropriate method. • • • The proposed Lucerne Plant expansion is not located within an Intergovernmental Agreement boundary. • • • ENGINEERING & CONSTRUCTION SERVICES, INC. FINAL DRAINAGE REPORT FOR DCP Midstream Lucerne Plant II Weld County, CO OWNER/DEVELOPER DCP Midstream, LP1050 1324 North 7th Avenue Greeley, Colorado 802631 Contact: Mr. Paul Park 970.378.6372 PREPARED BY ZAP Engineering, Inc. 12567 West Cedar Drive Lakewood, Colorado 80228 720.529.4430 Contact: Steve Tzap DATE October 30, 2008 ZAP PROJECT NUMBER 08021 12567 W. CEDAR DR • SUITE 210 • LAKEWOOD, CO 80228. 720.529.4430 •FAX: 720.529.4437 • zapecs.com • • • ENGINEERING & CONSTRUCTION SERVICES, INC. October 30, 2008 Mr. Chris Gathman Weld County Building Department 918 10th Street Greeley, Colorado 80631 Reference: Final Drainage Report for DCP Midstream Lucerne Plant Expansion Project located in Weld County, Colorado Dear Mr. Gathman; ZAP Engineering and Construction Services, Inc. has been hired by DCP Midstream, LP to perform Civil Engineering services for the proposed 6.7 -acre industrial expansion development that is located within unincorporated Weld County. It is our understanding that the proposed site will contain various compressor units, coolers, and a control center located within metal buildings. Additional equipment to be constructed at the facility include compressor cooling units, and inlet filter separator, miscellaneous small storage tanks, slug catchers, and miscellaneous related mechanical and electrical equipment. The site previously consisted of agricultural areas. Onsite grading and drainage has been carefully designed to promote drainage and access through the site while maintaining a 0.08% slope for the safe operation of the proposed equipment. This Final Drainage Report for has been prepared in accordance with Weld County Requirements for a project of this type and scope. If you require further information regarding this report or design, or have questions regarding the drainage, please feel free to give me a call. Regards, Eric M. Riegel For and on behalf of Zap Engineering and Construction Services, Inc. ZAP ENGINEERING AND CONSTRUCTION SERVICES, INC. • zapecs.com Page 1 of 8 Final Drainage Report DCP Midstream Lucerne Expansion — October 30, 2008 TABLE OF CONTENTS II GENERAL LOCATION AND DESCRIPTION III DRAINAGE BASINS AND SUB -BASINS IV DRAINAGE DESIGN CRITERIA V STORMWATER MANAGEMENT FACILITY VI CONCLUSIONS VII REFERENCES VIII APPENDICES 1. APPENDIX A- MAPS AND FIGURES a. Vicinity Map b. FIRMETTE Panel 0802660770C Exhibit c. Figure 1 — Historic Drainage Map d. Figure 2 — Developed Drainage Plan and Details 2. APPENDIX B — HYDROLOGIC COMPUTATIONS a. NRCS Soils Map, Legend & Soils Hydrologic Group b. Historic Time of Concentrations & Runoff Coefficients c. Developed Time of Concentrations & Runoff Coefficients d. Historic 10-yr and 100-yr Rational Method Routing e. Developed 10-yr and 100-yr Rational Method Routing f. UDFCD Figures RA -3 and RA -6 Rainfall Depth Duration Frequencies g. UDFCD Recommended Percentage Impervious Values - Table RO-3 h. UDFCD Runoff Coefficients - Table RO-5 3 4 4 6 6 7 8 9- 3. APPENDIX C- HYDRAULIC COMPUTATIONS a. UDFCD Average Flow Velocities — Table RO-1 b. Pond, weir, and channel Calculations ZAP ENGINEERING AND CONSTRUCTION SERVICES, INC. • zapecs.com Page 2 of 8 • • Final Drainage Report • I CERTIFICATION • • DCP Midstream Lucerne Expansion — October 30, 2008 "I hereby certify that this report for the final drainage design of the DCP Midstream Lucerne Expansion 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." k Registered Professional Engineer II GENERAL LOCATION AND DESCRIPTION DCP Midstream, LP is proposing to expand an existing industrial facility by developing an additional 6.8 acres adjacent to the existing plant and located within Weld County. The parcel is located within Section 28, Township 6 North, Range 65 West of the 6"' Principal Meridian. The 6.7 -acre development is part of a larger parcel located along WCR 43. The property is bounded to the west by the existing Lucerne gas facility. To the north, east, and south are existing agricultural lands. A vicinity map is included in the Appendix of this report. This development use and operations are related to industrial gas processing. The project consists of various compressor units, coolers, and a control center located within metal buildings as well as additional equipment such as compressor cooling units, inlet filter separator, miscellaneous small storage tanks, slug catchers, and miscellaneous related mechanical and electrical equipment. The site previously consisted of agricultural fields which are currently planted with corn. The site generally slopes to the southeast at flat grades of less than 1.0% and ultimately drains into existing irrigation channels and Sand Creek located approximately 2,500 feet east of the proposed development. Onsite grading and drainage has been carefully designed to promote drainage and access through the site while maintaining a 0.08% slope for the proposed equipment. The soils on the site are classified as Altvan loam and as depicted in the attached NRCS Soils classification map located in the Appendix. The hydrologic groups for the onsite soils are group B. No portion of this project site was found to exist in any FEMA regulatory floodplains. The FEMA FIRM Panel No. FM0802660629C generated for the area near the site is included in the Appendix of this report. ZAP ENGINEERING AND CONSTRUCTION SERVICES, INC. • zapecs.com Page 3 of 8 Final Drainage Report DCP Midstream Lucerne Expansion — October 30, 2008 No evidence of flooding was present onsite or found from recorded easements. There are two existing irrigation canals located along the west and north property lines that will not be impacted significantly by this development. A crossing at the north end of the project site for the project's entrance is the only known impact at the time of this report. Significant geological features were not observed. III DRAINAGE BASINS AND SUB -BASINS MAJOR DRAINAGE DESCRIPTION The project site is generally tributary to Sand Creek. The existing land is used for agriculture and consists of planted corn. The proposed land use is industrial gas processing. The site generally outfalls to the southeast following existing drainage patterns. Sand Creek is located approximately 2,500 feet east of the project site. The enclosed historic drainage map depicts the existing site with one sub basins, Basin HA. The historic site was assumed to be 2% impervious for the historic flow analysis. Existing uphill offsite areas to the west and north are intercepted by existing irrigation facilities and were not studied for this report. The change in impervious from historic to developed conditions is 80%, per UDFCD Table RO-3 Recommended Percentage Impervious Values for light industrial. MINOR DRAINAGE BASINS Sub -Basin HA consists of existing agricultural lands that generally drain southeast into existing drainage swales that convey runoff southeast. Runoff continues southeast draining directly into Sand Creek and as shown on the Historic Drainage Map included in the Appendix of this report. Time of concentration, and historic site flows have also been included in the attached Appendix. IV DRAINAGE DESIGN CRITERIA REGULATIONS The drainage design presented herein was prepared in accordance with the Weld County Storm Drainage Criteria for the drainage design. Erosion control details and documentation were prepared under a separate CASMP, and as directed by the State of Colorado and the EPA. Stormwater management details for this site will include sediment facilities, vehicle tracking control, concrete washout area, and silt fence installation at a minimum. DRAINAGE STUDIES AND SITE CONSTRAINTS No previous drainage studies or master plans are known regarding this site. Drainage studies from adjacent sites were also not available for review. The site constraints for the proposed development will provide little deviation from existing conditions, and the proposed conditions provide some water quality enhancements using the proposed retention facility that is not part of the existing site. ZAP ENGINEERING AND CONSTRUCTION SERVICES, INC. • zapecs.com Page 4 of 8 Final Drainage Report DCP Midstream Lucerne Expansion — October 30, 2008 HYDROLOGY The Rational Method (Q=CIA) was used to determine the site storm runoff (Q) for the storm events. Runoff coefficients (C) were taken from the enclosed UDFCD table located in the Appendix. Contributing areas (A) have been calculated for Design Points in each Sub -Basin. Intensities (I) were calculated using Figures RA -3 and RA -6 to develop intensities for the 10 -year minor and 100 -year major storm event at intervals for all Sub - Basins impacted by the project (See Appendix). Pre and post development time of concentrations, corresponding rainfall intensities, composite post condition runoff coefficients and storm flows for the 10 -year and 100 -year storms for each Sub -Basin are provided in the Appendix. HYDRAULICS Design capacities were determined for the associated drainage features using general engineering practice. Retention Pond calculations are provided in the Appendix. Emergency overflow is maintained to the southeast, consistent with historic patterns. GENERAL DRAINAGE DESIGN The enclosed developed drainage map depicts the proposed site with two sub -basins, onsite sub -basin A and offsite sub -basin OS1. Basins A and OS1 continue relatively unaltered from historic conditions. Developed sub -basin A represents the new basin configuration resultant from the development design. Runoff from sub -basin A generally sheet flows southeast either draining directly into the proposed retention pond or into proposed swales that direct runoff into the proposed retention pond, and can be released into sub -basin OS1 under DCP Midstream direction and under their stormwater operations permit via the outlet pipe. The attached Appendix details the design process, tables, figures, charts, and computations used to complete the design. SPECIFIC DRAINAGE DETAILS The enclosed developed drainage map depicts the proposed site with two sub -basins one onsite sub -basin A and offsite sub -basin OS1. The developed site was assumed to be light industrial in nature thus creating an overall imperviousness of 80% as compared with the historic 2% used for historic flow analysis. Developed sub -basin A, consisting of 16.67 and 30.27cfs in the 10 and 100 -year storm events, respectively drains to Design Point 1. Sub -basin A consists of light industrial areas that generally drain southeast into the proposed swales or proposed retention facility designed to serve this basin. Runoff is released at allowable rates and continues southeast into sub -basin OS1 and ultimately discharges into Sand Creek located east of the sub -basin approximately 2,500 feet. A proposed emergency overflow weir allows runoff to continue south from the proposed retention facility. Offsite sub -basin OS1, consisting of 4.80 and 16.64cfs in the 10 and 100 -year storm events, respectively drains to Design Point 2. Sub -basin OS1 consists of existing agricultural lands areas that generally drain south and ultimately into Sand Creek located approximately 2,500 feet to the east. ZAP ENGINEERING AND CONSTRUCTION SERVICES, INC. • zapecs.com Page 5 of 8 Final Drainage Report DCP Midstream Lucerne Expansion — October 30, 2008 V STORMWATER MANAGEMENT FACILITY DESIGN STORMWATER CONVEYANCE FACILITIES The proposed site improvements utilize overland sheet flow and swales to convey runoff across the site to the proposed retention facility and as depicted on the enclosed drainage map. STORMWATER STORAGE FACILITIES The proposed onsite retention facility provides a level of water quality enhancement for the site. The attached Appendix includes calculations for this facility. WATER QUALITY ENHANCEMENT BEST MANAGEMENT PRACTICES The proposed onsite retention facility provides a level of water quality enhancement. FLOODPLAIN The project site is not located within or near a FEMA designated 100-yr floodplain or other known floodplain. The enclosed FIRM Panel 0802660629C, revised September 28, 1982, is located in the Appendix. GROUNDWATER There is no documentation or evidence of groundwater to our knowledge. ADDITIONAL PERMITTING REQUIREMENTS No additional permitting is anticipated at this time. VI CONCLUSIONS The design of the post development drainage for this site has been carefully completed to direct offsite flows through the site while directing onsite flows to the proposed retention facility. To the best of our knowledge, this Drainage Report complies with all local applicable standards and regulations and poses no threat to the life safety or welfare of the public. The attached Developed Drainage Map depicts the drainage Design Points and configuration of the storm drainage system. Other reference materials including a vicinity map, capacities and design information have been included in the attached Appendix. VII REFERENCES 1. "Weld County Storm Drainage Criteria Addendum to the Urban Storm Drainage Criteria Manuals Vol. 1-3", Weld County Public Works Department, Colorado, October 2006. ZAP ENGINEERING AND CONSTRUCTION SERVICES, INC. • zapecs.com Page 6 of 8 Final Drainage Report DCP Midstream Lucerne Expansion — October 30, 2008 2. "Urban Storm Drainage Criteria Manuals Vol. 1-3", Urban Drainage Flood Control District, April 2008. ZAP ENGINEERING AND CONSTRUCTION SERVICES, INC. • zapecs.com Page 7 of 8 • • Final Drainage Report DCP Midstream Lucerne Expansion — October 30, 2008 • VIII APPENDICES ZAP ENGINEERING AND CONSTRUCTION SERVICES, INC. • zapecs.com Page 8 of 8 • • • • • z O ad z a1 Z .. a 0 x 's w I- a) 5 U ado w c Z N3 wLL 0 U •N n o -1 a (a 0 E y 0 a 0 C y U C N c 0 R 3 C, a U c 0 Y L C C) c 0 U w O N E H 0 a o m.- w w o a 0 o a -ogg10 A m$$ 'm SEEm00 % Impervious 0 0 0 0 00EM 00 NOON onn o m w moo 0600 .2 _ a _ .E is Urbanized Check to Urbanized Check Total Length t1=(L/160)+10 (ft) (min) 0 In EO8 H LcC e 0 Travel Time t,=Length/(Velocity x 60) Length Slope Velocity t, I (ft) (ft/ft) (fps) (mm) 750 0 006 2 6 3 Initial Overland Time (=0 395(1 1-Cs)L°'S " Upper Length Slope t. (it) (lift) (mm) 400 001 433 Compose. Runoff Coati C,„= Kd+(0 858? -0 786'2+0 774i+0 04) & CA Values U0 0 N x a ano o o Q n U & xr = 0 0 a 0 Basin Design Data Desgn Area Area Area Area Area Point Undev Paved Gravel Roof Total % Outtall (AC) (AC) (AC) (AC) (AC) Impery 1 141 00 00 00 141 002 cc Om Historic TOC • • • • • a) C O r co v �a U C O L C a) C C O U O d E H CO 0 o 0m,,-WW0 N F So z o Bi 0 9 a u _ r 'won't 0 % Impervious OF. °m CO 0 m O 0 0 0 0 0 O 1' 0 0 0 0 LO CO Nb N a co 00 0 co con o- 01 CO Ca a 72 T. ,c E N `- '' tc Urbanized Check t,, Urbanized Check Total Length to=(L180)+10 (ft) (mm) 680 13 8 800 14 4 E a 0 E 0 a r n Travel Time t=Lengthl(Velocity x 60) Length Slope Velocity t, (ft) (f't) (fps) (mm) 260 0006 1 47 400 0004 15 44 Initial Overland Time t:=0 395(1 1-05)L"°S 1° Upper Length Slope (ft) (Rttt) (mm) Co W as Composite Runoff Coeff Cd Km*(0 858P-0 7801+0 774i+0 04) d C'A Values a o g 8 0 0 a 0 foa. 2N o= =o K 0 0 0 0 Basin Design Data Design Area Area Area Area Area Point Undev Paved Gravel Roof Total Outfall (AC) (AC) (AC) (AC) (AC) Impery 1 67 080 2 74 002 mN 'et m a O 0 0 • APPENDIX A • STORM DRAINAGE DESIGN AND TECHNICAL CRITERIA • w P. Rational Method Standard Form SF -2. St L Z J J N` t` p O v, A ill w z a I DESIGN STORM: /0 Vie top vie N/5. rote ( G cn K i w K 1 TRAVEL TIME C E I.UIOO13A a g Hl0N31 c a a zis 3dld c 3dOlS o MO Id NOIS30 £° w w ce w Mold 133d.LS 3d019 -,z I TOTAL RUNOFF 0 ' CALCULATED BY: E2 o a 0 0¢ I CHECKED BY: I c` 2 (vo)3 oz 'E DIRECT RUNOFF O &" I E N m tic VO C^ N n kli 01 C E -.3-- S JO)'dd3Oo ddON(ThOa c O - (V) V321V j T T NOIS30 %321V Y S 1NIOd NOIS30 - _ w y O 7- C • Q X 3 2 W a a • A STORM DRAINAGE DESIGN AND TECHNICAL CRIT • Rational Method Procedure e Standard Form SF -2. Storm Draina JOBNO.: ego al PROJECT: J UGFc,JE G1(p/{fJ$ia/c/ DESIGN STORM: /0 ./ R i 10O Y,C ot. ci _o pc.J` REMARKS TRAVEL TIME l E A110013A a C an HION31 c PIPE 3ZIS 3dld c 3d019 e MO Id NOIS30 u w w n I- MOld 133818 adO18 e . n TOTAL RUNOFF 0 li CALCULATED BY: c,C « o C' 0 1 0 CHECKED BY: 1 L c (v0)3 °l E DIRECT RUNOFF 0c'et - 7 PA g I c '- NM M T v N 3/4.5 VO N VI z r T y N 01 c E oo -_ T T to T T (0)'dd300 ddONfl8 t„% 9 o C p r O ‘3 en p (v) Valk(�. m �, . N r NOIS30 V38V Q € S 1NIOd NOIS30 — N — N i- W N T O - T O Q 8 0 DRAINAGE CRITERIA MANUAL (V. 1) 14 P 69 W 1.75 I LlONOMONT R 71 W R 70 H 115 rIIWDT • I DER ERROR C0Nu L • P 68 W 7 1.65 • S50ALIA BRIGHT° R 66 W R 65 W 5 65 PAHOE 0. ISLAS PAR ER • DENVER R 11 W R 70 W R 69 W R 58 W R 67 W R 55 W R 55 W 1.65 • P ILo TE'n S tyE R 64 W ADAMS _ ARAPAHOE ARAPAHO, L5ERT P 54 W R 63 W F gure RA -3 —Rainfall Depth -Duration -Frequency: 10 -Year, 1 -Hour Rainfall Rev. 01/2004 Urban Drainage and Flood Control District RAINFALL R 6364 1.65 I.651t RA -15 • • • RAINFALL RA -18 6 5 C DRAINAGE CRITERIA MANUAL (V. 1) • PRo�� 'I W c5 R 70 W 65 2.9 P 69 W R 68 W I L_ R 67 W R 66 W 26 2.65 H ES W ? 1 R 69 W R 65 W .1 5 wwoT •Eii LONGMONT • 1 WETS .D DER BRIGHT°, /I • DAMS / • N J F ER ON a[LAVER 1 0 ADAMS nRaPAHnE --. 'SKI}EH • / S n 'vi ARAPAH(JE wa A APAHQE C lOOTS PA EP • 66BERT SEDALIA \ 2.15 R 70 w t2.6 \ R so w R os W i `a'BP w` 5 -hR se W R ea w R E. w Figure RA -6 —Rainfall Depth -Duration -Frequency: 100 -Year, 1 -Hour Rainfall 01/2004 Urban Drainage and Flood Control District DRAINAGE CRITERIA MANUAL (V. 1) RUNOFF Table RO-3—Recommended Percentage Imperviousness Values Land Use or Surface Characteristics Percentage Imperviousness Business: Commercial areas 95 Neighborhood areas 85 Residential: Single-family Multi -unit (detached) 60 Multi -unit (attached) 75 Half -acre lot or larger * Apartments 80 Industrial: Light areas 80 Heavy areas 90 Parks, cemeteries 5 Playgrounds 10 Schools 50 Railroad yard areas 15 Undeveloped Areas: Historic flow analysis 2 Greenbelts, agricultural 2 Off -site flow analysis (when land use not defined) 45 Streets: Paved 100 Gravel (packed) 40 Drive and walks 90 Roofs 90 Lawns, sandy soil 0 Lawns, clayey soil 0 * See Figures RO-3 through RO-5 for percentage imperviousness. Based in part on the data collected by the District since 1969, an empirical relationship between C and the percentage imperviousness for various storm return periods was developed. Thus, values for C can be determined using the following equations (Urbonas, Guo and Tucker 1990). CA = KA + (1.31i3 - 1.44i2 + 1.135i - 0.12) for CA ≥ 0, otherwise CA= 0 (RO-6) 06/2002 Urban Drainage and Flood Control District RO-9 DRAINAGE CRITERIA MANUAL (V. 1) Table RO-5— Runoff Coefficients, C RUNOFF Percentage Imperviousness Type C and D NRCS Hydrologic Soil Groups 2-yr 5-yr 10-yr 25-yr 50-yr 100-yr 0% 0.04 0.15 0.25 0.37 0.44 0.50 5% 0.08 0.18 0.28 0.39 0.46 0.52 10% 0.11 0.21 0.30 0.41 0.47 0.53 15% 0.14 0.24 0.32 0.43 0.49 0.54 20% 0.17 0.26 0.34 0.44 0.50 0.55 25% 0.20 0.28 0.36 0.46 0.51 0.56 30% 0.22 0.30 0.38 0.47 0.52 0.57 35% 0.25 0.33 0.40 0.48 0.53 0.57 40% 0.28 0.35 0.42 0.50 0.54 0.58 45% 0.31 0.37 0.44 0.51 0.55 0.59 50% 0.34 0.40 0.46 0.53 0.57 0.60 55% 0.37 0.43 0.48 0.55 0.58 0.62 60% 0.41 0.46 0.51 0.57 0.60 0.63 65% 0.45 0.49 0.54 0.59 0.62 0.65 70% 0.49 0.53 0.57 0.62 0.65 0.68 75% 0.54 0.58 0.62 0.66 0.68 0.71 80% 0.60 0.63 0.66 0.70 0.72 0.74 85% 0.66 0.68 0.71 0.75 0.77 0.79 90% 0.73 0.75 0.77 0.80 0.82 0.83 95% 0.80 0.82 0.84 0.87 0.88 0.89 100% 0.89 0.90 0.92 0.94 0.95 0.96 TYPE B NRCS HYDROLOGIC SOILS GROUP 0% 0.02 0.08 0.15 0.25 0.30 0.35 5% 0.04 0.10 0.19 0.28 0.33 0.38 10% 0.06 0.14 0.22 0.31 0.36 0.40 15% 0.08 0.17 0.25 0.33 0.38 0.42 20% 0.12 0.20 0.27 0.35 0.40 0.44 25% 0.15 0.22 0.30 0.37 0.41 0.46 30% 0.18 0.25 0.32 0.39 0.43 0.47 35% 0.20 0.27 0.34 0.41 0.44 0.48 40% 0.23 0.30 0.36 0.42 0.46 0.50 45% 0.26 0.32 0.38 0.44 0.48 0.51 50% 0.29 0.35 0.40 0.46 0.49 0.52 55% 0.33 0.38 0.43 0.48 0.51 0.54 60% 0.37 0.41 0.46 0.51 0.54 0.56 65% 0.41 0.45 0.49 0.54 0.57 0.59 70% 0.45 0.49 0.53 0.58 0.60 0.62 75% 0.51 0.54 0.58 0.62 0.64 0.66 80% 0.57 0.59 0.63 0.66 0.68 0.70 85% 0.63 0.66 0.69 0.72 0.73 0.75 90% 0.71 0.73 0.75 0.78 0.80 0.81 95% 0.79 0.81 0.83 0.85 0.87 0.88 100% 0.89 0.90 0.92 0.94 0.95 0.96 2007-01 Urban Drainage and Flood Control District RO-11 DRAINAGE CRITERIA MANUAL (V. 1) WATERCOURSE SLOPE IN PERCENT 50 30 20 10 5 3 2 1 .5 RUNOFF h 3 L e •W 3 r `r • 3 pbw , tiu?rE" W Co 4 -e ry Jr* 3f r OW �e0 4We ei �Ov A. y W 3r r V `r ere 44 I SEO r i SW 3 4 eb a id 3A Ce 3 ~ oe W n t r 0 r 02 W� a ar R r / / .1 .2 .3 .5 1 2 3 5 VELOCITY IN FEET PER SECOND 10 20 Figure RO-1—Estimate of Average Overland Flow Velocity for Use With the Rational Formula 06/2002 Urban Drainage and Flood Control District RO-13 Date: /d % Pogo: / of j By: e, Chkd By: Project: L IL ER -NC • • • Icvvnan/ PuAJP C'AtC' wads GLEL. (rf-�j4) 1169/. 4091 as a-ELE:Asc Joh #: J goa t date (Pt) 3/, 970 zg401 /2,953 05 ut-ID = Ci A vat (F / /1027 3g, 308 4-,4-1 D -o9 y 3,416 v 6,1 Ac 2,09 ears • • • • • 100-YR weir calculator Given Input Data: weir Type Rectangular Equation Suppressed Solving for Depth of Flow Flowrate 34.4800 cfs Coefficient 0.6500 Height 12.0000 in Computed Results: Depth of Flow 11.9353 in Full Flow 34.7608 cfs velocity 3.4667 fps width 120.0000 in Area 10.0000 ft2 Perimeter 144.0000 in wet Perimeter 143.8706 in Wet Area 9.9461 ft2 Percent Full 99.4608 % Response to TRAFFIC IMPACT from proposed Lucerne Expansion Vehicle traffic from the proposed Lucerne expansion will remain the same, or be reduced, compared to the existing Lucerne facility. The entrance gate for the proposed facility will be located just east of the entrance gate for the existing facility. The proposed entrance will be approximately 1000 feet west of Weld County Road 43. Current total vehicle traffic along Weld County Road 43 is approximately 1056 vehicles per day (see attached). DCP Midstream currently averages approximately 2 pickup trucks and 3 big trucks per day. Due to pipeline delivery of natural gas liquids from the proposed new plant, instead of trucking the liquids out of the existing plant, DCP Midstreams contribution to the traffic count will be reduced. • The majority of vehicle traffic from existing and proposed facilities will travel south on Weld County Road 43 to Highway 263 (8th Street), occasionally vehicles will travel north on Weld County Road 43 to Highway 392 (Weld County Road 68). Vehicle traffic at the proposed facility will be passing through an entrance gate which will be approximately 50 feet wide, allowing for easy access. Additionally, the location of the access road (old Union Pacific Right of Way) will allow facility vehicle traffic excellent visibility for any oncoming traffic on Weld County road 43. • • Page 1 of 2 • • • Park, Paul D From: Jerry Steinbar Usteinbar@co.weld.co.us] Sent: Wednesday, October 15, 2008 2:43 PM To: Park, Paul D Subject: RE: Traffic count Paul, These are the most recent counts that I have. I don't have a count on CR43/SH263-62. Road Name From To Date 1 AADT 1 43 62 64 10/14/2005 1255 43 64 66 6/12/2008 1056 43 66 Hwy 392 6/12/2008 1075 Jerry Steinbar Weld County Public Works Traffic Division 970-304-6496 ext. 3789 970 -301 -2621 -Cell jsteinbar@co.weld.co.us • • • The proposed Lucerne Plant expansion is not located within a Flood Hazard. • • • The proposed Lucerne Plant expansion is not located within a Geologic Hazard. Hello