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Home My WebLink About20191380.tiffThis application is intended to be processed in conjunction with an Amended Recorded Exemption and a 2 -Lot Recorded Exemption New legal is Lot A REC. 18-0136 t. - P USE BY SPECIAL REVIEW (USR) APPLICATION DEPARTMENT OF PLANNING SERVICES * 1555 N. 17TH AVENUE * GREELEY, CO 80631 vyw jv.wel d cjov.ca m * 970-400-6100 * FAX 970-304-6498 FOR PLANNING DEPARTMENT USE: AMOUNT $ APPLICATION RECEIVED BY DATE RECEIVED: CASE # ASSIGNED: 10/3/18 UISF18-0110 PLANNER ASSIGNED: DA Parcel Number*: I Address of site: 0 5 3 26663 CFA 40 _o 0 4 (*A 12 digit number on Tax I .D. information, obtainable at www_weldgov,cor ). Legal Description: PT 82 28-4-64 Lot B Rec Exempt RE -1462 Section: 28 Township: 4 _ N Range: 64 Zone District: Ag Acreage: 7.29 FEE OVVNER S OF THE PROPERTY: Name: Parker Guttersen Floodplain: 1dV eological Hazard: YCN p Airport Overlay: Y(jN Company: Box M Ranch, LW Phone #: (970) 378-8888 Email: Street Address: 2361 Highway 263 City/State/Zip Code: Name: Greeley, CO 80631 Company: Phone #: Street Address: _ City/State/Zip Code: Name: Email: Company: Phone #: Street Address: _ City/State/Zip Code: Email. APPLICANT OR AUTHORIZED AGENT: (See below: Authorization must accompany all applications signed by Authorized Agents) Name: Shannon Toomey Company: AGPROfessionals Phone #: (970) 535-9318 Email: stoomey@agpros.com Street Address: 3050 67th Ave. City/State/Zip Code: Greeley, CC 80634 PROPOSED USE: Pipe laydown yard, temporary storage and construction, temporary office trailer 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 ayttority to sign for the corporatto r� gRature. Owner or Auth /4 a ti O0 4 71-0 Name ate a Signature: Owner or Authorized Agent Date Print Name Rev 4/2016 Isabella Juanicorena From: Sent: To: Cc: Subject: Shannon Toomey <stoomey@agpros.com> Friday, April 12, 2019 4:13 PM Tisa Juanicorena Isabella Juanicorena; Selena Baltierra; Esther Gesick RE: USR18-0110 and USR18-0112 Caution: This email originated from outside of Weld County Government. Do not click links or open attachments unless you recognize the sender and know the content is safe. Tisa, The current mailing address for both Box M Ranch, LLC and Guttersen Ranches, LLC is 3050 67th Avenue, Suite 100, Greeley, CO 80634. They share the same office. Let me know if you need anything else. Thank you, Shannon Toomey Land Planner AGPROfessionals 3050 67th Avenue Greeley, CO 80634 970-535-9318 office www.agpros.com AGPROfessionals DEVELOPERS OF AGRICULTURE From: Tisa Juanicorena <tjuanicorena@weldgov.com> Sent: Thursday, April 11, 2019 10:37 AM To: Shannon Toomey <stoomey@agpros.com> Cc: Isabella Juanicorena <ijuanicorena@weldgov.com>; Selena Baltierra <sbaltierra@weldgov.com>; Esther Gesick <egesick@weldgov.com> Subject: USR18-0110 and USR18-0112 Good Morning Shannon, Thank you for taking my call this morning. Please reply and let me know if these USRs should have the same address. If they have the same "office address" that is ok — I just wanted to make sure that what we put on both the Resolution and the Improvements Agreement for each case are in fact correct since this is what the BOCC will sign and will be recorded for the Improvements/Road Maintenance Agreement. I understand they have the same owner but wanted to be sure. Thank you for your assistance in this matter! Tisa 1 AGPRO fessionals DEVELOPERS OF AGRICULTURE October 1, 2018 To Whom It May Concern: • Box M Ranch, LLC is contracted with AGPROfessionals for all permitting, planning, engineering, and regulatory work relating to Weld County land use permitting. AGPROfessionals fessionals is authorized to represent and request the release of all records necessary on the behalf of Box M Ranch, LLC. We respectfully request that all correspondence be directed to AGPROfessionals. Printed Name: Nr-V, Giatrw Date ENGINEERING, PLANNING, CONSULTING & REAL ESTATE 3050 67th Avenue • Greeley, CO80634 970.535.9318 /office • 970.535.9854 / fax • www.agpros.com Diana Aungst From: Shannon Toomey <stoomey@agpros.com> Sent: Friday, October 5, 2018 9:41 AM To: Diana Aungst Subject: RE: Box M USR Follow Up Flag: Follow up Flag Status: Flagged Caution: This email originated from outside of Weld County Government. Do not click links or open attachments unless you recognize the sender and know the content is safe. Hi Diana, By temporary storage I mean that pipeline materials for specific projects will be brought to the site and stored only until they can be moved to the construction site where they will be used. The materials will be stored "temporarily" until they can be used in the project for which they are designated. How long the materials remain on site will depend on the timeline for project they are being used for. Thanks,. Shannon Toomey Land Planning Technician AG PRofessi ors als 3050 67th Avenue Greeley, CO 80634 970-535-9318 office www.agpros.com AG PROfessional5 DEVELOPERS OF AGRJC LFL RE From: Diana Aungst <daungst@weidgov.com> Sent: Friday, October 5, 2018 9:15 AM To: Shannon Toomey <stoorney@agpros.com> Subject: Box M USR Shannon — please clarify what you mean by "temporary" storage for the laydown yard. Thanks, Diana I AGPROfessionals DEVELOPERS RS 0 AC lMU [TURF: f; SITE SPECIFIC DEVELOPMENT PLAN AND USE BY SPECIAL REVIEW (USR) QUESTIONNAIRE Prepared for Box M Ranch, LLC Planning Questions: 1. Explain, in detail, the proposed use of the property. Box M Ranch, LLC is requesting a Use By Special Review (USR) for a pipe laydown yard and office trailer to support oil and gas operations in the Weld County. The subject property is located in the South Half of Section 28, Township 4 North, Range 64 West of the 6tr+. P.M., being Lot B of Recorded Exemption RE -1462. The 2 -Lot Recorded Exemption application submitted in conjunction with this USR application will create two lots from Lot B of Recorded Exemption RE -1462. The proposed U S R will encumber the newly created Lot A. The laydown yard will be used for temporary outdoor storage of pipes, equipment, and other materials used by oil and gas operations. 2. Explain how this proposal is consistent with the intent of the Weld County code, chapter 22 of the Comprehensive Plan. Sec. 22-2-20, — Agriculture goals and policies. A, Goal 1. 4. A. Policy 1.4. Recognize the changing dynamics of agricultural land uses, their locations and the size and scope of operations when developing land use regulations. G. A. Goal 7 County land use regulations should protect the individual property owner's rights to request a land use change. G. Goal 7. 1. A. Policy 71. County /and use regulations should support commercial and industrial uses that are directly related to, or dependent upon, agriculture, to locate within the agricultural areas, when the impact to surrounding properties is minimal, or can be mitigated, and where adequate services are currently available or reasonably obtainable. Sec. 22-6-20. — Economic development Goals and Policies. E. EGON. Goal 5. Recognize and promote specific places and resources in the County that can uniquely support economic development Sec. 22-5-160. Use of resources Goals and Policies A. -UR. Goat 1. Right to Extract Mineral Resources Statement Weld County has some of the most abundant mineral resources, including, but not limited to, sand and gravel, oil, natural gas, and coal. Under title 34 of the Colorado Revised Statutes, minerals are vita/ resources because (a) the state's commercial mineral deposits are essential to the state's economy; (b) the populous counties of the state face a critical ENGINEERING, PLANNING, CONSULTING & REAL ESTATE 3050 67th Avenue, Suite 200 ❑ Greeley, CO 80634 970.535.9318 /office ❑ 970.535.9854 / fax O vomv.agpros.conx Page 2 of 7 shortage of such deposits; and (c) such deposits should be extracted according to a rational plan, calculated to avoid waste of such deposits and cause the least practicable disruption of the ecology and quality of life of the citizens of the populous counties of the state. Mineral resource locations are widespread throughout the County and person moving into these areas must recognize the various impacts associated with this development often times, mineral resource sites are fixed to their geographical and geophysical locations. Moreover, these resources are protected property rights and mineral owners should be afforded the opportunity to extract the mineral resource. This proposal is for an oil and gas support service located in close proximity to existing oil and gas operations requiring laydown yard services. Oil and gas operations are abundant in Weld County and support services are needed in close proximity to such operations. The County recognizes the importance of its abundant mineral resources and their importance to the state's economy. The County Code recognizes specific places and resources in the county can uniquely support economic development. Due to the site's proximity to oil and gas operations, this site is well suited to provide storage opportunities for the oil and gas industry. 3. Explain how this proposal is consistent with the intent of the Weld County Code, chapter 23 (Zoning) and the zone district in which it is located. The subject property is located in the Agricultural (A) Zone District. As listed in Section 23-3- 40, oil and gas support and service activities are allowed in the A Zone as a Use By Special Review. This section also permits as a Use By Special Review "any use permitted as a Use by Right, an Accessory Use, or a Use by Special Review in the Commercial or Industrial zone districts." Sec. 23-3-10. Intent — The A (Agricultural) Zone District is established to maintain and promote agriculture as an essential feature of the County. The A (Agricultural) Zone District is intended to provide areas for the conduct of agricultural activities and activities related to agriculture and agricultural production without the interference of other, incompatible land uses. The proposed use is not incompatible with agricultural activities. No agricultural land will be taken out of production as a result of this USR. The proposed site is located on a parcel containing farmland irrigated by center pivot. The USR site within this parcel is outside of the irrigated area. A Recorded Exemption application submitted in conjunction with this USR application is intended to separate the area used for the USR from the rest of the agricultural property. 4. Describe what type of land uses surround the site. Explain how the proposed use is consistent and compatible with surrounding land uses. Agricultural land uses that surround the subject property include dairies, a hog farm, irrigated cropland, and rangeland. AmUSR-991 for an oil and gas production facility, U R11-0031 for an oil and gas support service facility, and U R12-0006 for a non -1041 major facility also surround the site. The proposed use is compatible with surrounding land uses as it will support oil and gas development in the area while preserving agriculturally productive land. Page3 of7 5. What are the hours and days of operation? (e.g. Monday thru Friday 8:00 a.m. to 5:00 p.m.) The facility will operate from 6:00 a.m. to 5:00 p.m. Monday through Friday but will have the ability to operate at any hour should an emergency require the site to operate outside of normal hours. Storage on site will take place 24 hours a day, 7 days a week. 6. List the number of full time and/or part time employees proposed to work at this site. It is proposed that 1-2 full time employees will work on the site. 7. If shift work is proposed include the number of employees per shift. No shift work is proposed. 8. List the number of people who will use this site. Include contractors, truck drivers, customers, volunteers, etc. At full build -out, up to 50 people are expected to be able to access the site daily, primarily employees and truck drivers. Visits to the site will be dispersed throughout the day and will depend on market demand for laydown yard services. 9. If this is a dairy, livestock confinement operation, kennel, etc., list the number and type of animals. N/A 10. Describe the type of lot surface and the square footage of each type. (e.g. asphalt, gravel, landscaping, dirt, grass, buildings) This site is 7.29 acres total. The outdoor storage area will be approximately 220,000 sq. ft. of improved gravel. The remaining area will be native grasses. 11. How many parking spaces are proposed? How many handicapped (ADA) parking spaces are proposed'? 4 parking spaces are proposed. The spaces will not be striped as parking will occur on gravel surfaces. 12. Explain the existing and proposed landscaping for the site. There is no existing or proposed landscaping for this site. 13. Describe the type of fence proposed for the site. (e.g. 6 -foot chain link with earth tone slats) 3 -strand barbed wire fencing will be used around the perimeter of the site. 14. Describe the proposed screening for all parking and outdoor storage areas. If the site is located in a f l ood p l a i n outdoor storage is restricted. Page 4 of7 Due to the rural location and compatible surrounding uses, no screening is proposed for parking or outdoor storage areas. 15. Explain any proposed reclamation procedures when termination of the use by Special Review activity occurs. When termination of the USR activity occurs, reclamation will involve the removal of gravel and re -planting of native grasses. 16. Who will provide fire protection to the site? The Platte Valley Fire Protection District will provide fire protection to the site. 17. List all proposed on -site and off -site improvements associated with the use (e.g. landscaping, fencing, buildings, drainage, turn lanes, etc.) and a timeline of when you will have each one of the improvements completed. No off -site improvements are proposed. On -site improvements include fencing, a portable office trailer, and improved gravel surfaces. On -site improvements are expected to occur upon completion and acceptance of the USR. Engineering Questions: 1. Describe how many roundtrips/day are expected for each vehicle type: Passenger Cars/Pickups, Tandem Trucks, Semi-Truck/Trailer/RV (Roundtrip = I trip in and I trip out of site) Semi -Tractor Trailers: 5 -Ton Trucks: Employee Vehicles: 5-10 per day. 5-10 per day 1-2 per day. 2. Describe the expected travel routes for site traffic. Traffic from the site will travel west to Weld County Road (WCR) 53 for travel north/south. Traffic routes will depend on the location of the oil and gas projects the site will be serving. 3. Describe the travel distribution along the routes (e.g. 50% of traffic will come from the north, 20% from the south, 30% from the east, etc.) It is expected that 50% of traffic will come from the north and 50% will come from the south on WCR 53. Travel routes will depend on the location of the oil and gas projects serviced by the site. 4. Describe the time of day that you expect the highest traffic volumes from above. The highest traffic volumes are expected to be generated during morning hours between 6:00 A.M. and 7:00 A.M. as employees arrive for the start of the business day. Traffic to the site will be dispersed throughout the day and will depend on the needs of oil and gas projects using the laydown yard. 5. Describe where the access to the site is planned. Page 5 of 7 The site will use the existing access located on WCR 40 approximately 860 -feet west of WCR 55. 6. Drainage Design: Detention pond summarized in a drainage report is required unless the project falls under an exception to storm water detention requirements per code section 23x12 30 FA. A. Does your site qualify for an exception to storm water detention? If so, describe in a drainage narrative the following: 1. Which exception is being applied for and include supporting documentation. 2. Where the water originates if it flows onto the property from an offsite source 3. Where it flows to as it leaves the property 4. The direction of flow across the property 5. If there have been previous drainage problems with the property A drainage report summarizing the detention pond design and construction is included with this application. B. Does your site require a storm water detention pond? If so, the following applies: 1. A drainage report summarizing the detention pond design with construction drawings and maintenance plan shall be completed by a Colorado Licensed Professional Engineer and adhere to the drainage related sections of the Weld County Code. 2. The drainage report must include a certification of compliance stamped and signed by the PE which can be found on the engineering website. 3. A general drainage report guidance checklist is available on the engineering website. More complete checklists are available upon request. Refer to the drainage report included with this application. Environmental Health Questions: 1. What is the drinking water source on the property? If utilizing a drinking water well include either the well permit or well permit application that was submitted to the state -Division of Water Resources. If utilizing a public water tap include a letter from the Water District, a tap or meter number, or a copy of the water bill. As 2 or less full-time employees will be on -site, bottled water will be provided as drinking water. 2. What type of sewage disposal system is on the property? If utilizing an existing septic system provide the septic permit number. If there is no septic permit due to the age of the existing septic system, apply for a septic permit through the Department of Public Health and Environment prior to submitting this application. If a new septic system will be installed, please state "a new septic system is proposed". Only propose portable toilets if the use is consistent with the Department of Public Health and Environment's portable toilet policy. Page 6 of 7 Portable toilets will be used for sewage disposal on the property. 3. If storage or warehousing is proposed, what type of items will be stored? P ipes, equipment and other materials used by oil and gas operations will be stored on the site. Storage is the main activity associated with this request. 4. Describe where and how storage and/or stockpile of wastes, chemicals, and/or petroleum will occur on this site. N o wastes, chemicals, or petroleum are proposed to be stored or stockpiled on this site. 5. If there will be fuel storage on site indicate the gallons and the secondary containment. State the number of tanks and gallons per tank. N o on -site fuel storage is proposed 6. If there will be washing of vehicles or equipment on site indicate how the wash water will be contained. No vehicle washing is proposed on -site. 7. If there will be floor drains indicate how the fluids will be contained. No floor drains are proposed. 8. Indicate if there will be any air emissions, (e.g. painting, oil storage, etc.) No air emissions are anticipated. 9. Provide a design and operations plan if applicable. (e.g. composting, landfills, etc.) N/A 10. Provide a nuisance management plan if applicable. (e.g. dairies, feedlots, etc.) N/A 11. Additional information may be requested depending on type of land use requested. N/A Building Questions: 1. List the type, size (square footage), and number of existing and proposed structures. Show and label all existing and proposed structures on the USR drawing. Label the use of the building and the square footage. There is currently a 353 sq. ft. single-family residence, a 1,800 sq. ft. utility building, and a 8,030 sq. ft. equipment shed on the property. A Recorded Exemption application submitted in conjunction with this USR application is intended to separate the existing farming operation and residence from the proposed USR site. Upon approval of the Recorded Exemption, only Page 7of7 the 8,030 sq. ft. equipment shed will remain on the USR site. A portable office trailer with restrooms is proposed for the USR site. 2. Explain how the existing structures will be used for this USR? None of the existing structures have proposed uses for this USR. 3. List the proposed use(s) of each structure. Office trailer - office and restroom facility. Preliminary Drainage Report For Box M Ranch, LLC USR Lot B Rec Exempt RE -1462 Being Part of S ' of Section 28, Township 4N, Range 64 W of the 6th P.M. AGPROfessionais DEVELOPERS OF AGRICI LTURK AGPROfessionals 3050 67th Avenue Greeley, CO 80634 (970) 535-9318 7/13/2018 Box M Rte, LTC Certificae tions pyo/ fy� Contents e7� Cc ificaLions - .a..raus - - ✓ Weld County `lY' inJJJ Certification. of '. L(��(I811.......I.i 6666666666666666666666666 ........ii � ucton • r•......•POW 5 11. jcatiojjn7 �(�{'}� ({ T ,( 1,..,H/,fa.l.1..iiSiii.iia i•, ii.....• 5 2. JDesciiption of Property i4I•In..i..•..•.Wi.••i...►••........ no OO• OOOp,, 1.a...i,.....m 5 Drainage BasinJJJ�and Sub 111Basin .. ii.i. Ya. f6 1. ..1JJFF jjj or Bas Description •,1.1..•,►I,............it......Y......•u..a{i - ...1.....I....,.• V 2. Sub -Basin 1 cscrip iol; - iut ir...i..••..},•..I......IY•. 6 Drainage nage Design Criteriat r .. 7 1. Development Li i e is !I I i I l I ..... i i ..7 2. Hydwtogeal Criteria,.,..i,ii 3. Hydraulic y lrAAy.aulic Cr�iityeii..�a�■ .LU..r.IU..afliii. ii+.ai..ii.ii.j•..ii.i.ia...... 7 DrainageFacility Design f.•.u..•...........•I..........,../l. w........11I..avu 19 1. General Concept......... 9 2. Specific Details ........._..,..----...._ 9 Conclusions ............ 11 1. Compliance with Weld County Cow - 11 2List Drainage - ,,.•i...i..i........ inn..•• 111 List o References ....•m.,.....4,.............. ........... ... . . ... a ....... . ... w....... ........... ........ 1 2 Appendices ii Bux M Raudi, f.I:C Certifications I hereby certify that this drainage narrative for the Box M Ranch, LLC proposed USR was prepared under my direct supervision in accordance with the protons of le Weld County s orm drainage criteria for the owners thereof. rcss c5 f A 14 a_ V1 Ices) Q I h JS F 1� r1 X111� W n , �,1/4 •urw�.n.n .•5�1� Iti t\\4 II,' Chad TeVelde, F.R. AGPk+C csionals 7/19/20 1 8 Preliminary DrafirAgP Recoil AQPtOf nsl; 3050 67th Axtbtue, Gnu* CO 80634 41 870.535-9318 • www pt . Page 3 or 7 CERTIFICATION OF COMPLIANCE ENGINEERING DESIGNED TO WELD COUNTY CODE STANDARDS AND CRITERIA, I Chad TeVelde Consultant Engineer for Box M Ranch, LLe understand and acknowledge that Applicant is seeking land. use approval of ("Applicant"), � FP � Fly Lase by Special Review ("Application") for the property described in the attached Exhibit "A." I have designed or reviewed the design ("Design") for the proposed land use set forth in the Application. I hereby certify, on behalf of Applicant that the Design will meet all applicable drainage requirements of the Weld County Code with the exception of variances) described below. This certification is not a grippantetKetoyarranty either expressed or flied. f� .0c,fill ) t. r.;, -0:„, -3 rr ;a.' 6: 1 6 a n ;... .ti 4 1 i ' ' _ C r f A li tt. r /`} .?:M iL rte-.. �... t`a •y't....1'n ^ Engineer of Rccnil SSCIignature (Engineer's Stamp) VARIANCE REQUEST 1) Describe the Weld County Code criteria of which a variance is being requested. 2) Describe why it is not possible to meet the Weld County Code. 3) Describe the proposed alternative with engineering rational which supports the intent of the Weld County Code. I understand and agree that the intention of the Code is to reduce impacts of development on neighboring downstream properties and the public. I understand if this variance request is dtatioved 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 Box Ar Ran h7 LJL Weld County Certification of Compliance This page intentionally left blank 7/1912018 preliminary Drainage Report Page 4 of 1₹ AGPROfessionals,. 3050 67° Avenue„ Greeley CO 80634 * 970-535-9318 * Wvww.agpros com flax iv! R_anrh. J.,JC Introduction 1. Location The proposed site is located in Lot B of RE -1462 being part of Section 28, T4N, R64 , mtt PM. This site is located east of Highway 85 and southeast of the Town of LaSalle, CO. The properties surrounding the site are undeveloped, agricultural farm land. The property is bordered on the south side by Weld County Road @VCR) 40. The nearest road to the east is WCR 55, to the north. is WCR 42 and to the west is WCR 53. No other major road ways are located within or adjacent to the property (see vicinity map in Appendix A). 2. Description of Property The applicant is proposing the development of proposed Lot A which is approximately 7.29 acres of the 315.8 -acre property. The proposed site is currently an agricultural property withexisting outbuildings. There is one type of soil: Vona loamy sand (0% to 5% slopes). The majority of the soil is welldrained, hydrologic soil group A (see USDA -MRCS soil report in Appendix A). Box M Ranch, LLC is the owner of the adjacent property downstream and to the east of the proposed site. Box M Ranch, LLC is the owner of the parcel adjacent to and upstream from the proposed site. No other properties are adjacent to the proposed Lot A. There are no major open channels within or adjacent to the proposed property, The applicant is proposing a pipe laydown yard with an office trailer to be used for oil and gas support service within the existing and proposed gravel drive area. No hazardous materials will be stored on site. 7/19/2018 Preliminary Dtaiimge Report Page 5 of 12 AGPROfessionals, 3050 671 Avenue, Greeley CO 80634 * 970-5'35-9318 * www,aJ:pu tri Box M Ranch. LIE Drainage Basin and Sub -Basins 1. Major Basin Description The proposed site is located in rural Weld County and is surrounded by undeveloped, agricultural land_ The site is non -urbanizing. A Master Plan for the site area is not currently available_ The proposed site was considered as one drainage basin for this report. Historically, the basin drainage flows towards the east northeast and ultimately Bows towards the South Platte River_ The site is mostly cast sloping and has a generally flat topography with slopes from zero to five percent predominately towards the eastern side of the property. Contours of the project location and the surrounding properties are shown on the United States Geological. Survey (ITSOS) topographic map in Appendix A. A Federal. Emergency Management Administration (FEMA) map of the project area is included in Appendix. A. The property is located on panel 08123C1775E 1775E and is not currently located within. a 100 -year floodplain. Potential. offsite flows from the north, south and the east should continue to flow east, away from the site and ultimately towards the South Platte MI/Cr. Potentialoffsite flows from the west primarily flow south and are muted around the site_ Therefore, an increase in runoff is not expected_ 2. Sub -Basin Description The site was evaluated as one basin, with stonuwater runoff being directed to the proposed detention pond on the southern side of the site. 7/19/2018 P eilrninary Drainage Report tae 6 of 12 kG.PROfessicumis, 3050 67th Avenue, Greeley CO 80634 * 970-535-9318 * \5'54W�aenmc °in Box M Ranch, I..IC Drainage Design Criteria 1. Development Criteria The proposed site runoff was evaluated using the criteria set forth in the UDFCD Criteria Manual Volumes 1, 2 and 3 and the WCBCG manual. 2. Hydrological Criteria From the NOAA Atlas 14 Kersey, CO precipitation. station, the estimated rainfall from the 10 -year, 1 -hour precipitation is 1.41 inches and the 100 -year, 1 -hour precipitation is 2.69 inches (sere NOAA Atlas 14 Rainfall Maps in Appendix A). These values were used for runoff calculations and to estimate the required detention volume. Percentage of imperviousness was determined using the recommended values from UDFCD Table 6-3. A percentage of imperviousness of two percent was used far the historic site_ The overall percentage of imperviousness for the proposed site was estimated to be 40 percent (see percentage of imperviousness calculation. in Appendix A). Using the percentage of imperviousness, the design storms and the UDFCD Detention Basin Volume Estimating spreadsheet, the historic and proposed peak runoff flowrates and detention volume were estimated for the basin (see Table 1). Peak runoff flowrates for the proposed site were calcu.l.attxl with the Modified FAA method using the time of concentration, runoff coefficients, and the precipitation depths from the UDFCD spreadsheet (see LIDFCD Runoff Calculations in Appendix A). Table 1: Pestk Runoff Flowrates Peak Runoff10 Year Peak 100 Year Peak. PIowrate (cfs) Flowrate (s# ) 10.36 Historic 1.73 Proposed 7.40 19.31 cfs = cubic feet per second 3, Hydraulic Criteria The 10 -year historic release rate was determined using the area of the proposed site and an estimated two percent historic imperviousness (see Historic Release Rate calculation in Appendix B). The volume rewired was calculated to be 0.68 acre-feet and the release rate was calculated to be 1.73 cubic feet per second. The required detention volume was calculated using the Modified FAA method from the UDFCD Detention Basin Volume Estimating Workbook (see UDFCD Detention Volume calculation in Appendix B). The proposed detention pond will have a capacity greater than the required 0.68 acre-feet at the 100 --year water surface elevation with an additional 1. feet of freeboard. A spillway will be proposed that will be designed to release the 100 -year storm event. The spillway crest will be at or above the invert of the freeboard elevation and the depth of the flow 7f19/2018 Preliminary Drainage Report Page 7 of 12 AGPRGfessionals, 3050 67* Avaue, GretleyCO 80634 * 970-535-9318 * vo,s, gproxtxnt 130x M Roach, 1..1,C should be less than six inches. Calculations for the spillway and stage storage for the pond will be included in Appendix B in the Final Drainage Report. Grass lined channels way be proposed on the site to convey stoiniwater runoff towards the detention pond. The drainage channels will be sized using the 100 -year, 1 -hour design storm peak flown per the WCECG. A. Manning's n of 0.035 will be used in calculations for a grass lined channel per the WCECG. The channels will have 4:1 side slopes and will be designed with one foot of freeboard for the 100 -year, 1 -hour storm event The Freude numbers for the channels will be less than the maximum of 0.8 from WCECG. Calculations for the channel capacities will be included in Appendix B in the Final Drainage Report_ Culverts may also be proposed to convey stormwater on the site. Culverts will be sized to convey the 10 -year, 1 -how design storm per the WCECG using th.e UDECD Culvert spreadsheet. A Manning's n of 0.013 will be used in calculations for a concrete pipe per the WCECG. Minimum slopes of 0.3% will be used in the design and rip rap sizes will be determined using the UDFCD Culvert spreadsheet, Calculations for the culvert capacity and rip rap sizing will be included in Appendix B in the Final Drainage Report. The headwater to diameter ratio will be less than one for the 10 -year design storm and less than 1.5 for the 100 -year design storm for each culvert. 7/19/20113 Preliminary Drainage Report Page ill of 12 AGPROfessionals, 3050 67 Avenue, Oteeley Co 80634 * 970-.5`i5-9318 * wtvw,egpros,c in poi M Ramrh, t is Drainage Facility Design 1. General Concept A detention pond is proposed along the south edge of the site. Runoff should generally sheet flow towards the pond_ The pond is designed to detain the 100 -year storm event and release at the 1.0 -year historic rate. Tb.e site should not significantly alter the historic drainage pattern. A historic drainage basin map and drainage plan are shown in Appendix C. Grading and erosion control plans will be included in the Final Drainage Report. 2. Specific Details Maintenance access will be provided for the pond. A. Scheduled Maintenance of Proposed Facilities Scheduled maintenance will occur during daylight, weekday hours. Routine maintenance will include but should not be limited to the following: • Mowing of the bank slopes and area around the pond on a monthly basis during the growing season and as needed during the cooler montb.s. ▪ Tb.e outfall structure from the pond and other areas will be inspected monthly for debris which could inhibit the proper flow of discharge. Any debris will be removed immediately and disposed of or placed in a location to prevent future maintenance and to not cause impact up or downstream of the structure. • Trash will be removed from around the pond to prevent entering the pond. Generally, the site should be kept free of loose trash which could be carried off site by wind or rain. • Inspect the pond and outfall structure for non -routine maintenance need. B. Periodic or Non -Scheduled Maintenance of Proposed Facility Periodic or non-scheduled maintenance includes routine inspection of the pond area and discharge/outfall structures to identify needed repairs and non -routine maintenance. These items may include but should not be limited to the following; • Pond area and outfall structure should be inspected after significant storm events. • Re -growth of trees on or around the pond bank. Tb.ese should be cut and removed from the pond area. • Sediment from the site may accumulate in the pond bottom and reduce the pond to below design. volume requirements, The pond should be excavated if the pond bottom elevation reached a level that allows excessive aquatic growth or reduces the pond efficiency such that the sediments are passing the discharge structure and release off site, 7/19t2018 Preliminary Drainage R.epurt Page 9 of 12 AGPROfessionals, 30.50 671` Avenue, Greeley CO 80634 * 970-535-9318 BBOK M Ranch, LJ C • Stabilization or re -grading of side slopes may be required periodically or after excessive rain events. Any disturbance of slopes should be reseeded or may require installation of erosion control materials until seeding can reestablish adequate grasses to prevent future erosion. • Any other maintenance or repairs which would minimize other maintenance to the pond or outfall, structure. If the pond is significantly impaired such that the pond is incapable of properly functioning to meet the Weld County stormwater discharge requirements, the owner should assess the corrective action needed and have the water quality facility restored by properly trained personnel. 7/19!2018 Preliminary Txainagg Report Page 10 of 112 AGPROfessionals, 3050 X57"' Avenue, Greeley CO 80634 * 970-535-9318 * www,aRoros,ermn Box M Rauch, .LIE Conclusions 1. Compliance with Weld County Code The drainage design of the BOX M Ranch, LLC USR is consistent with the Weld County Engineering and Construction Guidelines and the Weld County Code. A detention pond is proposed along the southern edge of the property. 2. Drainage Concept Historical flow patterns and run-off amounts should be maintained in such a manner that should reasonably preserve the natural character of the area and prevent property damage of the type generally attributed to run-off rate and velocity increases, diversions, concentration and/or unplanned pending of storm mu -off for the 100 -year storm event The drainage design included in this report should be effective in controlling damage from storm runoff by detaining the 100 -year, 1 -hour storm event and releasing at the 10 - year historic rate. No irrigation companies or property owners should be affected by the proposed development. Master Drainage recommendations are not available in the area of this project. If a Master Plan is developed for this area, the design allows for flexibility and potential for allowing additional flows through the detention area by utilizing infiltration. 711912918 Preliminary Drainage Repott Page 11 of 12 AGPROfestionals,, 3050 Sr Avenue, Greeley Co 80634 * 970-535-9318 "` V .cone R,. M R2.,Yh, l.LC List of References Federal Emergency Management Agency. "FEMA Flood Map Service Center." FED Flood Map Service Center. FEMA, 20 Jan. 2016. Web. 2 Jul. 2018. <bttp s : //m s c _ f ern a . govlp o rtai.> _ United States Department of Agriculture - Natural Resources Conservation. Service. "Web Soil Survey." Web Soil Survey. USDA - NRCS, 2006. Web. 2 Jul. 2018. <bttp://websoil survey. sc. egov.usda,.goviA.pp/W ebSoilSurvey.aspx>. United States Department of Commerce - National Oceanic and Atmospheric Administration.. " NGAA's National Weather Service." Point Precipitation Frequency Estimates. USDC - NOAA National Weather Service. Web. 2 Jul. 2018. <hds c _nw s _ no a a . govfhdsclpfds/pfd sari ntp age_htm1? tat= 4 0.27 83> . United States Geological Survey. "Maps." Overview - Maps, United States Geological Survey_ USGS, 2016. Web. 2 Jul. 2018.<www.usgs.govlprmductsimapsltopoamaps>. Urban Drainage and Flood Control District. Detention Basin Volume Estimating Workbook. Computer software_ Software_ Vera 2.34. <http://udfcd.org'software>. Urban Drainage and Flood Control District. "Urban Storm Drainage Criteria Manual Volume 1." USDCM: Volume I Management, Hydrology and Hydraulics. UDFCD, Max'. 2017. Web. 2 Jul. 2018. <http:fludfcd.orgivolume-one>. Urban Drainage and Flood Control District "Urban. Storm Drainage Criteria Manual Volumes 2." USDCAt Voh ne 2 Structures, Storage and Recreation. UDFCD, Sep. 2017. Web. 2 Jul. 2018. <http://udfcd.orgivolume-one>. Weld County. "Property Portal - Map Search." Property Portal - Map Search. Weld County, 19 Dec_ 2017_ Web. 2 Jul_ 2018. <bttps:llwww_ co.weld. co.usimaps 1 !propertypartall?acct=P 1779500>. Weld County. "Weld County Engineering and Construction Criteria Guidelines_" Weld County Engineering, July 2017. Web. 2 Jul. 2018. <www.weldgov.coxn/UserFi.ies/S v Server_ 6 Fit epartuienlsiPubIic%2°Works/En gin.e eri ngf W C EC G%2 0- %208-3 -17 .p df . > 7119 18 Preliminary Drainage Report Page 12 of 12 AGEROfessionals, 3050 67' Avenue, Greeley CO 80634 * 9r70-535-9313 �` WaLigPs os.,(n Box M Ranch, LLC Appendices A. Hydrologic Computations a. Vicinity Map b. USDA-NRCS Soil Report c. USGS Topographic Map d. PUMA FIRMette Map c. NOAA Atlas 14 Rainfall Maps f Percentage of Imperviousness g_ UDFCD Runoff Calculations B, Hydraulic Computations a_ 10 -Year Historic Release Rate b. UDFCD Detention Volume C. 24x36 Maps a. Historic Drainage Basin Map b. Drainage Plan Box M Ranch, LLC APPENDIX A Hydrologic Computations This reap Is a user to erated static output from an Internet mapping site and is far reference only Data layers that appear on this map may PrMay net be accurate, ojrrent, or otherwise reliable THIS MAP IS NOT TO BE USED FOR NAVIGATION USDA United States a Department of Agriculture MRCS Natural Resources Conservation Service A product of the National Cooperative Soil Survey, a joint effort of the United States Department of Agriculture and other Federal agencies, State agencies including the Agricultural Experiment Stations, and local participants Custom Soil Resource Report for Weld County, Colorado, Southern Part July 2, 2018 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:1/www.nres_usda.govfwpsi portallnres/mainisoilslhealth/) and certain conservation and engineering applications_ For more detailed information, contact your local USDA Service Center (https:lfoffices.sc_egov. usda.govllooatoriapp?agency=arcs) or your NRCS State Soil Scientist(httpliwww_nrcs_usda_goviwps/portalinrcsidetailisoilsicontactusi? cid=nres142p2,053951). 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 sods are poorly suited to use as septic tank absorption fields. A high water table makes a sail 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 2 alternative means for communication of program information (Braille, large print, audicitape, etc.) should contact USDA's TARGET Center at (202) 720-2600 (voice and TDB), 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 Pref�ace... ...... 2 How Soil Surreys Are Made---.,,,,,lr,.•5 Soil Map, 8 !l+...al. t,r la..r ..t. ♦i.� ut I. Soil Map ...r,.,..,. 9 Legend.,.., .10 Map t.lnit Legerx! !l.a.....,..,..11 Map Unit Descriptions 11 Weld County, Colorado, Southern Part _-13 72 —Vona loamy sand, 0 to 3 pint slopes.... , .13 73 —Vona loamy sand, 3 to 5 percent slopes.... , .14 References .18 4 How Soil Surveys Are Made Soil surveys are made to provide information about the soils and miscellaneous areas in a specific area. They include a description of the soils and miscellaneous areas and their location on the landscape and tables that show soil properties and limitations affecting various uses. Soil scientists observed the steepness, length, and shape of the slopes; the general pattern of drainage; the kinds of crops and native plants; and the kinds of bedrock. They observed and described many soil profiles. A soil profile is the sequence of natural layers, or horizons, in a soil. The profile extends from the surface down into the unconsolidated material in which the soil formed or from the surface down to bedrock. The unconsolidated material is devoid of roots and other living organisms and has not been changed by other biological activity. Currently, soils are mapped according to the boundaries of major land resource areas (MLRAs). MLRAs are geographically associated land resource units that share common characteristics related to physiography, geology, climate, water resources, soils, biological resources, and land uses (USDA, 2006). Soil survey areas typically consist of parts of one or more MLRA. The soils and miscellaneous areas in a survey area occur in an orderly pattern that is related to the geology, landforms, relief, climate, and natural vegetation of the area. Each kind of soil and miscellaneous area is associated with a particular kind of landform or with a segment of the landform. By observing the soils and miscellaneous areas in the survey area and relating their position to specific segments of the landform, a soil scientist develops a concept, or model, of how they were formed. Thus, during mapping, this model enables the soil scientist to predict with a considerable degree of accuracy the kind of soil or miscellaneous area at a specific location on the landscape. Commonly, individual soils on the landscape merge into one another as their characteristics gradually change_ To construct an accurate soil map, however, soil scientists must determine the boundaries between the soils_ They can observe only a limited number of soil profiles. Nevertheless, these observations, supplemented by an understanding of the soil -vegetation -landscape relationship, are sufficient to verify predictions of the kinds of soil in an area and to determine the boundaries. Soil scientists recorded the characteristics of the soil profiles that they studied. They noted soil color, texture, size and shape of soil aggregates, kind and amount of rock fragments, distribution of plant roots, reaction, and other features that enable them to identify soils. After describing the soils in the survey area and determining their properties, the soil scientists assigned the soils to taxonomic classes (units). Taxonomic classes are concepts. Each taxonomic class has a set of soil characteristics with precisely defined limits_ The classes are used as a basis for comparison to classify soils systematically. Soil taxonomy, the system of taxonomic classification used in the United States, is based mainly on the kind and character of soil properties and the arrangement of horizons within the profile. After the soil 5 Custom Soil Resource Report scientists classified and named the soils in the survey area, they compared the individual soils with similar soils in the same taxonomic class in other areas so that they could confirm data and assemble additional data based on experience and research_ The objective of soil mapping is not to delineate pure map unit components; the objective is to separate the landscape into landforms or landforni segments that have similar use and management requirements. Each map unit is defined by a unique combination of soil components andlor miscellaneous areas in predictable proportions. Some components may be highly contrasting to the other components of the map unit The presence of minor components in a map unit in no way diminishes the usefulness or accuracy of the data_ The delineation of such landforrns and landform segments on the map provides sufficient information for the development of resource plans_ If intensive use of small areas is planned, onsite investigation is needed to define and locate the soils and miscellaneous areas_ Soil scientists make many field observations in the process of producing a soil map. The frequency of observation is dependent upon several factors, including scale of mapping, intensity of mapping, design of map units, complexity of the landscape, and experience of the soil scientist_ Observations are made to test and refine the soil -landscape model and predictions and to verify the classification of the soils at specific locations_ Once the soil -landscape model is refined, a significantly smaller number of measurements of individual soil properties are made and recorded. These measurements may include field measurements, such as those for color, depth to bedrock, and texture, and laboratory measurements, such as those for content of sand, silt, clay, salt, and other components Properties of each soil typically vary from one point to another across the landscape. Observations for map unit components are aggregated to develop ranges of characteristics for the components. The aggregated values are presented_ Direct measurements do not exist for every property presented for every map unit component. Values for some properties are estimated from combinations of other properties. While a soil survey is in progress, samples of some of the soils in the area generally are collected for laboratory analyses and for engineering tests. Soil scientists interpret the data from these analyses and tests as well as the field -observed characteristics and the soil properties to determine the expected behavior of the soils under different uses. Interpretations for all of the soils are field tested through observation of the soils in different uses and under different levels of management. Some interpretations are modified to fit local conditions, and some new interpretations are developed to meet local needs. Data are assembled from other sources, such as research information, production records, and field experience of specialists. For example, data on crop yields under defined levels of management are assembled from farm records and from field or plot experiments on the same kinds of soil_ Predictions about soil behavior are based not only on soil properties but also on such variables as climate and biological activity. Soil conditions are predictable over long periods of time, but they are not predictable from year to year. For example, soil scientists can predict with a fairly high degree of accuracy that a given soil will have a high water table within certain depths in most years, but they cannot predict that a high water table will always be at a specific level in the soil on a specific date_ After soil scientists located and identified the significant natural bodies of soil in the survey area, they drew the boundaries of these bodies on aerial photographs and 6 Custom Soil Resource Report identified each as a specific map unit_ Aerial photographs show trees, buildings, fields, roads, and rivers, all of which help in locating boundaries accurat$fy. 7 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 uarieus rretudala about data used to produce the map, and a description of each soil map unit. 8 Custom Soil Resource Report Soil Map 4a° 4tV N 4Q° 1633'N :R r?Ece -�eTES Et tK i4 ;gym. A 538170 Map Susie:1:1A/U If printed art A larx-ape (11"x 8.51 sheet. 40 40 BU 1X1 Feet 0 7i 100 X0 300 Map p. #1an;' a frt o& Omer ac xliirates; Via84 ate to; 4tiMlone 1.311 WG994 9 0 405 ifi? C R ' 33' N Custom Soil Resource Report MAP LEGEND Area of Interest (ADI0 Area of Interoat (A0I) Soils L� Soli Map Unit Polygons Sol, Map Unit Lines Soil Map Unit Points Spacial Paint Features a x 49 ~J 46, a 0 • .9 • O 1) H Blowout Borrow Pit Clay Spot Closed Depression Crewel Pit Gravelly Spat Landfill Lava Flow Marsh or iwamp Mine or Quarry Miscellaneous Vater Perennial Later Rock Outcrop Saline Spot Sandy Spot Severely Eroded Spot Sinkhole Slide or Silo Sent Spot 0 a L 0s Spoil Area Stony Spot Very Swny Wirt Spot S pot Other Special Line Features Water Features Streams and nal% Transportation it __ Rolla Interstate Highways US Routes Major Roads Local Roads Background Aerial Photography MAP INFORMATION The soil surveys that comprise your AOI were mapped at 1:24,000. Warning: Soil Map may not be valid at this scale. Enlargement of maps beyond the scale of mapping can case misunderstanding of the detail of mapping and accuracy of soil line plac*rnent The reaps do not show the small areas of contrasting soils that could have been shown at a more detailed scale. Please rely on the bar scale on each map sheet far map measurements. Sours of Map: Natural Resources Conservation Service Web Soil Survey URL: Coordinate System: Web Mercator (EPSG:3B57) Maps from the Web Soil Survey are based on the Web Mercator projection, which preserves direction and shape but distorts distance and area. A projection that preserves area, such as the Albers equal-area conic projection, should be used if more accurate calculations of distance or area are required. This product Is generated from the USDA-NRCS certified data as of the version date(s) listed below. Sell Survey Area: Weld County, Colorado, Southern Part Survey Area Data: Version 16, Oct 10, 2017 Sall map units are labeled (as space allows) for map scales 1:50,000 or larger. Date(s) aerial Images were photographed: Jul 17, 2015 --Sep 22, 2016 The orthophoto or other base map on which tie soil lines were compiled and digitized probably differs from the background imagery displayed on these maps. As a result, some minor shifting of map unit boundaries may be evident. 10 Custom Soil Resource Report Map Unit Legend Map UnitSymbol1 Map Unit Kama ( Acres In fO1 I Percent of MN ogre leanly sand. 0 to 3 percent slopes 4.9 69.0% 73 Vnne loamy sand. 3 to 5 percent slopes 2.2 31,0% Totals for free of Interest 7.2 100.0% 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 absented, and consequently they are riot 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 landfomns or landform segments that have similar use and management requirements_ The delineation of such segments on the map provides sufficient information for the development of resource plans. If intensive use of small areas is planned, however, 11 Custom Soil Resource Report 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 sari 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 foam, 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 tie 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. 12 Custom SoiF Resource Report Weld County, Colorado, Southern Part 72 Vona loamy sand, 0 to 3 percent slopes Map Unit Selling 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 Iooal importance Map Unit Composition Vona arid similar soils: 85 percent Minor components: 15 percent Estimates are based on obsenrativns, descriptions, and transects of the mapunit Description of Vona Setting Landforrn: 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 50 inches: sandy loam Properties and qualities Slope: 0 to 3 percent Depth to restrictive feature: More than 8O 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/br) Depth to water table: More than 30 inches Frequency of flooding: None Frequency ofponding: None Calcium carbonate, maximum in profile: 15 percent Salinity, maximum in profile: Nor'isaline to slightly saline (0.0 to 4.0 mmhoslcrn) Available water storage in profile: Moderate (about 6.5 inches) Interpretive groups Land capability classification (irrigated): 3e Land capability classification (uonirrigated): 4e Hydrologic Soil Group: A Ecological site: Sandy Plains (R06IBV024CO) Hydrrc soil rating: No Minor Components Remmit Percent of map unit 10 percent Hydric soil rating: No 13 Custom Soil Resource Report Valent Percent of map unit: 5 percent Hydric soil rating: No 73 -Vona loamy sand, 3 to 5 percent slopes Map Unit Setting National map unit symbol: 363s Elevation: 4,600 to 5,200 feet Mean annual precipitation: 13 to 15 inches Mean untrue! air temperature: 48 to 55 degrees F Frost -free period: 130 to 160 days Farmland classification: Not prime 'farmland Map Unit Composition Vona and similar soils: 85 percent Minor components: 15 percent Estimates are based on observations, descriptions, and Irarissecis of Me mapunit Description of Vona Setting Landforrn: Terraces, plains Down -slope shape: Linear Across -slope shape: Linear Parent material: Alluvium and/or eolian deposits Typical profile H1 - 0 to 8 inches: loamy sand H2 - 6 to 28 inches: fine sandy loam H3 - 28 to 60 inches: sandy loam Properties and qualities Slope: 3 to 5 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 intr) Depth to water table: More than 80 inches Frequency of flooding: None Frequency of pending: None Calcium carbonate, maximum in profile: 15 percent Salinity maximum in profile: Nonsaline to slightly saline (O.O to 4.0 mmhoslcm) Available water storage in profile: Moderate (about 6.5 inches) Interpretive groups Land capability classification (irrigated): 30 Land capability classification (nonirrigated): 4e Hydrologic Soil Group: A 14 Custorp Soil Resource Report Ecological site: Sandy Plains (R067BY024CO) Hflue soil rating: No Minor Components Remrnit Percent of map unit: 8 percent Hydro soil rating: No Valent Percent of map unit: 7 percent Hydric soil rating: No References American Association of State Highway and Transportation Officials (AASHTC). 2004. Standard specifications for transportation materials and methods of sampling and testing. 24th edition. American Society for Testing and Materials (ASTM)_ 2005. Standard classification of soils for engineering purposes. ASTM Standard D2487-00_ Cawardin, L , V. Carter, FC_ Golet, and E.T. LaRoe. 1979. Classification of wetlands and deep -water habitats of the United States. U.S. Fish and Wildlife Service FWSIOBS-79/31A Federal Register. July 13, 1994. Changes in hydric soils of the United States. Federal Register September 18, 2002, Hydric soils of the United States. Hurt, (1W., and LM_ Vasilas, editors. Version 6.0, 2006. Field indicators of hydric soils in the United States. National Research Council_ 1995. Wetlands: Characteristics and boundaries. Soil Survey Division Staff. 1993. Soil survey manual. Soil Conservation Service. U.S. Department of Agriculture Handbook 18. http://www.nrcs.uscla.goviwpsiportall nres{detait'nationallsoilsl7cid=nres142p2 054202 Soil Survey Staff. 1999_ Sod taxonomy: A basic system of soil classification for making and interpreting soil surveys. 2nd edition. Natural Resources Conservation Service, U.S. Department of Agriculture Handbook 436. http:// wvvuir.nres. usda.gov'wpslportal/nres/detail'national{soils{7cid=nres142p2_053577 Soil Survey Staff. 2010_ Keys to soil taxonomy_ 11th edition. U.S. Department of Agriculture, Natural Resources Conservation Service. http:// www, n res. u s d a. g o vlwp s 1porta lIn rcsfdetail{nation a l /soils./ 7c id = n res 142 p2_053 5 80 Tiner, R_W., Jr. 1985. Wetlands of Delaware. U.S. Fish and Wildlife Service and Delaware Department of Natural Resources and Environmental Control, Wetlands Section. United States Army Corps of Engineers, Environmental Laboratory, 1987_ Corps of Engineers wetlands delineation manual. Waterways Experiment Station Technical Report Y-87-1. United States Department of Agriculture, Natural' Resources Conservation Service. National forestry manual_ httpliwww.nrcs.usda,govAvpsiportaVnrcsidetailtsoils,/ horne!'cid=nres142p2 053374 United States Department of Agriculture, Natural Resources Conservation Service. National range and pasture handbook_ http:i/ww+nr_nres_usda.govfwpslportaUnresl detail/national'landuselrangepasturelcid=stelprdb1043084 16 Custom Soil Resource Report United States Department Agriculture, Natural Resources Conservation Service. National soil survey handbook, title 430 -VI _ http://www.nrcs.uscia_goviwp.s/pertalf n rc s f deta i Ilso i I sf s cie nt i stsf ? c id = n res 142 p2 _05424 2 United States Department of Agriculture, Natural Resource Conservation Service_ 2006. Land resource regions and major land resource areas of the United States, the Caribbean, and the Pacific Basin. U.S_ Department of Agriculture Handbook 296. http:}lwww.nres.usda_govlwpsfpartalinres/detailinationatsoiis!? cid=nrcs142p2_053624 United States Department of Agriculture, Soil Conservation Service. 1961. Land capability classification_ L.I.S. Department of Agriculture Handbook 210. http:// www.nres.usda.gavelntemettFSE_DOCUMENTS1nres142p2_052290.pdf 17 Y at NI . sr Hamm rue USW r 1 i us !09>QI�Ni IN THE II1UJCR ICI.S. taPaQICJ11 IWIfly Met .7 adore bane t p ',.IT. •I a .en re SIP tIr wvuu Haller. 41111 aalll a�a wawa P Vial lGales ♦ttPWSW rriirrltlr.Irt I11WIrr Oa InfraLl ✓ t I/IuOrrYA>•agarYIa/Nr �f e a E ..• 5' ' }I I'S J ran 7 ■ e .r t t; t mun •4 - I 1 is a i4 .L 41__ .. M i by a,ttolaY71 4.i1 ii at .IW SIM IMAM! .Itil montntmi WN••1Tr• M•1 Mane pawn• O HS M,A,Y H•R MA I.JvW lam 4'••I I••.R.•• In!'" - .•t. — •.{.. i . S. w+. N..." is. M. P.M. Ter. SSINIr .•••d maims* arYs 00 t@IYM. lath* HMIHMIS YIN I. CPI ...Mxrl = MR r.110.14, IR • PI Waen •—- M• i�w vltNc..-nil Pots atin..ter •.n - mI 4 • 75 II I[ a ♦' e , , I f '1 wit •.a• ti 1 `!1 SC,LE tante Has `a le IT mulct' V4et cdimL ILkAtiltaicte crwtalnDce. I,Si Whorl IMPS S • 1 it HUSH a a I tl err U a rpr4opltl.11s Laaa 1 at infra &t. 4- i L} I a. 1 3 rn ran 1Me= limmiLn. n. r- _ •� - at 4.Io1111IPn.t*M.1 ISM MOWS MIROUN IP OHM filmommentimitoonlim Whits r Ya 1 tFe aIHS..Psat_-Y.11t ado 6 ■ a 1 Odor -a. • ■ a kfic --Tel •m•Y.•r- 1 {CHIN Ina eta Lea M I n•• IHim ta: Ymar yt I .v aim re ilartailr trim •YEA adivine _n•. - - i1FMII Y• Sit aside Ma Ma O me.e. WAX!' VIEW SCOWL. 07 71M1 tit II Sn '►I Hie ha 71 •ti •T Mae Wr Mpg Mr ii National Flood Hazard Layer FIRMette 1OG1CilD 01114 250 500 1,000 AREK F, MIN NAL E Z.'. 1,500 III. Feet 1:6,000 2,000 4f]"16'20.56" N FEMA Legend amts PIS REPORT FOR DETAILED LEGEND AND INQE% MAP FOR FIRM PANEL LAYOUT SPECIAL FLOOD HAZARD AREAS Without Base Rood ttevatlan MK) ≥"w d V .199 With 8FE or Depth Zone 4E.Ao, Au Vt A(i Rcgutotory Floodway OTHER AREAS OF FLOOD HAZARD tV l G5i4L0 YUF OTHER AREAS GENERAL STRUCTURES ${C SCREEN 0_2% Annual Chance Rood Hazard, Area 01 1% anneal chance flood with average depth leas then one foot or with drainage sures of leas than cne square mile ,Z0 nil A RIME Condii lort5 .% Annual Chance Flood Hazard zwre! Area with Reduced Flaad Risk due to Levee. See Notes. lone x Area with Flood Risk due to Laveezoni a Area of Minimal Flood Hazard zoo x Effective LOMRe Area of Undetermined Flaad Hazard aan. — - - Channel, Culvert, or Storm Sewer twin Levee, Dike, or Floodwall IT.! OTHER - FEATURES MAP PANELS Cross Sections with 1% Annual Chance Water Surface Elevation Coastal Transact Base Flood Elevation Line (SFE) Limit Qf Study Jurisdiction Boundary Coastal Transact Baseline Profile Baseline Hydroarephic Feature Digital DuffiAYallabid No Digital Data Available Unmapped The pin displayed on the map Is Qn epproxJm tr; point selected by the user and does not writes! an iwitioritatiVe property location. This mep compliers with FE lA'e standards for the use of digital flood maps if it iii not void a described below. The basemep shown complies with FEMA's basem p accuracy standards The flood hazard information is derives' directly from the authoritative NFHL web services provided by FEMA. This map wp0 cxocrtiocl an 7/2/2013 at 3:63:00 PM and does not reflect changes or amendments subsequent to this date and time. The NFHL and effective Infarmatlon may change or become superseded by new data over time. ThJs rnap image Is veld if the pry or mart of the following map elements do net appear; besemep Imagery, flood zone labels, legend, *nails bar, natio oreetion data, avmmunity Identifiers. FlRM panel number, and FIRM effective date. Map images for unmapped and unmodernLzed areas cannot be used for regulatory purposes. NOAA Atlas 14, Volume 8, Version 2 Location name: Kersey, Colorado, USA* Latitude: 40.2783°, Longitude: -104.5528°' Elevation: 4755.11 Ir.' • source: E 7I Maps " source: USGS POINT' PRECIPITATION FREQUENCY ES -IMAMS San)a Parka, Deborah Math, saidre Pai cvic. lstlani Roy, Michael St Laurent, Gad Trypaluk, Dale Unruh, Niched Yekte. t'aevtfery Bonnie NOAA, National ifilealtrer Service, Silver Spring. Maryland PF Wader I PF uraptiloal I Maps & aerials PF tabular PDS-based point precipitation frequency estimates with 90% confidence Intervals (in inches)1 Average recurrence inter+ral (years) �`125 u; „� I 2 11 I� 10 50 100 soo �� o0 1 loan _ 5-66x1(((0-197-0.304) 0244 I 0.296 (0 2.39-3389) 0393 J(01318-0.4&2il 0A85 (0 3$9.0.812) 0.633 I(6M 0.495-o.gil 0.761 (0575-1 0# 0.902 ( C 654.1.25) 1.06 `:1.731-1 5 (yj 1.28 (p -(348.1.8x) 1.47 (0937-2.15) 10-rnln f_0.367 ((0.289-D 446)II(0. 0 41) (1,463-00.7' 2'0 0.712 (0.6r69 -G837) n (1.U7-2.20) (124-2.74) (1.57 3.15) 1 -rrran 0.436 (0.352-0.544)(0.426 0.528 0.559) 0202 I(4.564-0-879} I 0.869 ( (0.694-1 08) I 1.13 (Q884-152) 1.36 (1.03-1.84) 1.61 (1.17.123) n 229 (1.52-a. 35) 2.62 30 -min 0.595 (0472-0.730)1 4.746 (0.570-0.882)ll 0.930 (0.754-1.1G) �� 1.51 1I II 1.82 (1.38-2.48) 2.16 I (1.57-3.00) 2.54 (176-3M) 3.09 I (7044.51) 3.54 1462.28-5.19) ��il.7241 0.863 (08x7-1.08)11 1.14 (0.916-1.4,3) 1.85 (1,46-2.50) 225 (1.70-3.05) 269 (1.C5 3,73h, 3.18 (220.4.54) 3.9(1 (2.59-5.72) 4.91 (2.0746.61) 2 -hr (0704-1 -07) 29-11.02 (46}-82'9F1.26) ( 1.34 (1.t?$-i �i'6) 3.82 (2ii6B-541) 472 {8 1Er$.B5} ;} 7 (3.53-7,94) 3 -hr 0.946 1.10 1.44! 1 1.78 2.36 2.88 I 3.48 I 4.15 5.16 6.13tM� 1(3,89-8,66), (0374.1.18) (0.802-1 38) (1-17-1.77) (1 '`#4-2.21) (1.88 -MB) (2.224.57) (2,74.78)11(2, 85) (3.47-745) 6 -hr I 1.10 (fl.9ft2-1.3+4) 128 (1 t15-1,St) 1.66 (1,36-2,03) , 2.67 (2.151-3 53) i 3.24 J 329 (2,945.28) 4.$1 (3.28.642) I 5.68 I (3.Bs-s,12) L 6.58 (4, 30-9,40)1 i i - -- 12 -hr I 1.2 ll 11 1.5'1 83) 1.66 (162-2 37) JI. 2.38 (1.95-2_90) 3.04 1I (2.44-3.83) 3.51 1(2 81-4.71) 4.25 (3.18-5 67) 4.94 (3 53.3.78) 5.95 I (4.07-8_36) t's.78I 1(4.48-9.59) 24 -hr 1 1.62 (127-1.62) 1.78 (1 X49-21+1) 2.27 (1.89.2 73) 2.72 (225-3.29) 3.41 (2,78-4 34) 11 4.00 x(3,14 5:14) tea (3,50-6.11) 5.336.33 (3.14-7 21) ( (4.37-8 7'9) 7.14 ( (4.76-9, 8) $laY � 1 1.74 (1.47-2.06) 2.06 (1.74-2.45) I 2.62 (220-3-13) 3.12 I (2.61-3-14) 3.85 (3.12-482) ll 4.45 1(3.31-5.03) ll 5.08 (3.86-6.59) I 5.76 (417-7 67) 8.69 (4.85-9.18) 7x,41 1(6.02-10.3) 1_d8y f I4 I 1.90 I (1 61-2,25) I 2.23 I (1 899-2.64) f 2.80 {I (2,364.32) ( 3.30 (2,77-3,93) I 4.04 (3-28-5 41) 4.84 (3.6$-5.84) I 626 ll (4.03-6 80) 8.98 (4.34-i7 $9) 8. 0 1 (4.03-9 39) I 7.86 (5 19-10.55) 4 -day 2.03 {'1 73-2.39) 136 (2 01-2.78) (2.419-3.47) (2$)-4,08) 4.18 (3.42-5 17) 4.79 (3.81-8,00) 5.43 (4:15495) (4,47-5005) (4.96-9.56) (5 32-10.7) 7-s�� 2.31 (198-2.70) 2.69 (2 30-3.15) I 3.33 (2.84-3.90) 3< .87 (3.28-4.56) 4.65 �� 526 (4(.24"6.50) ) 5.89 (4.54-7,45) 6.55 (482-8.53) 7.45 (5.26-9-97) 8.15 (5.84-11,1) 10• -day 2.56 (2 20-2.97) ll 2.98 {2.58-348) 3.67 (314-4.28) �I 5.66 (4.555-6,96) 5.31 (44,BT-7.94 I--- 6.96 (514-8 97) 11(5.54-10.4)1 7.61 8.47 (5 85-11.4) 20 -day 3.27 (2 84-3,77) 3.77 (3.274.35) 4.57 (3.95-5.28) 5.23 (4,49-6.07) 6.12 (5.05-7 29) 6.79 (5.48-821) 7.45 ' (5.30-9.23) 8.11 (6.04-10.3) 8.96 (6.41-11.7) 9.69 (670.12$) 3 •da Y 3.85 (336-0.41) 4.42 (3S4-5-06) 5.32 I (4t 61-8,11) 1 6.05 (5.21-�6 98) II 7.02 (&82-8.311) 7.75 (6:28-9.30) 8.45 (6,81-1o:4) 9.15 (&85-11.8) 11h0 (7.22-13.0j 710.7 I (7,50-14.2) 45 -day (3.99-5,19) (3.99.5.19) 5.23 (4_57-3,96) 6.28 (547-7,16) 7.12 {8,17-6.17) 8.23 (6.85-9 65) 9.04 (7.36-10.6) 9.82 (7.72-12 0) 105 (7 90.13.3) 11.5 (8 33-14 8) 12.2 (8 61-16.0) i#0-daX #'x.13 (4.51-5.82) 5.91 (5.18-8.71) 7.92 1 (8-29-8.10} 8.07 (7.02423) 1� 102 (8.34-12.1) I 114 (812-134) 1(6.96.14.8)1 11.9 12.8 (932-16.5) 13.5 (9.60-'1T,7) 1 Precipitation frequency (PF) estimates In this table are based on frequency analysis of partial duration series (PDS). Numbers ii parenthesis are PF estimates at laver and upper bounds of Oa $0% c nfidenca interval. The probability that predi:dation frequency estimates (for a given duration and average recurrence interval} wit be greater than the upper abound (at less than the lower bound) is 5%. Eslinates at upper borric's are not checked against probable maximum precipitation (PAP) estimates and may be higher than currently valid RAP values Please refer to NOAA Ades 14 document for more infomlation. QacK10 Top. PF graphical PDS-based depth -duration -frequency (ODE} curves Latitude.: 40.2783', Longitude: -1045528' G_ t E �E iral 14 12 1Q a • $ c C �to 6 a 4 rL 2 2 5 10 25 SO 100 200 t OAAAtlas 14. Volume 8, Version 2 ft P3 N It CO o t t t -o Pilitir rt. v ri Average recurrence interval (years) >1>011. tit a 500 1000 Created (GMT): Mon Jul 2 20:59:47 2018 Back to Teak Maps & aerials Small scale terrain Average remittance interval {} 1 2 6 I0 25 so 100 200 600 1 000 Duration 5 -min 2 -day 10-Mn — 3 -day 16 -min — 4 -day 30-n Un — 7 -day 80-r1ln 10 -day 2 -hr — 20 -day 3 -hr — 30 -day 0 -hr — +t5 -day 122-lw — 60 -day 24 -hr In at . jt t. I _ Large scale map Lb ✓ Lei - Large scale terrain aw- • trollies 'V e Phi-- I on ' r t 4043 III_ : H./ gou l£ielC 1 • Cheyertne • ;, I M Cirrl5y 'Immoe=Ng • Loign-kr. ,Denver 14.3L, kin I1 6Omi CCljeyr.esirig.,_ Furl Coiliis 1 c .ntnrnr1n Longo oe � rs, 1 goutrler 0 100krn 1 6'€Imi k Large scareaerial Back to Top US Devarirnerrt of Cammeac National Oceanic and Almospheric Adntnistration National Vsdeethel Sal vice National water Center 1325 East West Hig away Slyer Spring, MD 20910 Questions?: HD Disclaimer AGPROfessionths rifvL.i.O?flk 8F# ORICv4"r'sat 3050 67th Avenue, Suite 200 Greeley, (O 806314 Telephone (910) 535-9318 w►vvrr.a gp ros.com Project Number: 1708-11 Designed By: AGPRDfessionals Checked By: C1v Date: 7/12/18 10:05 AM Sheet: of Subject: Impervious Area Calculation Proposed = User Entry Solving for the Percent Impervious Ill: description per UDFCD Ta 96 Impervious ITotal SciFt Acres Impervious Roofs 9096 9,374 0.19 Gravel Road 40% 220,000 2.02 Drive and Walk 90% 381 0.01 Agriculture 2% R7,957 0.04 None 0% 0.00 None 0% 0.00 None 0% 0.00 None 0.00 None 0.00 None 0% 0.00 None 0% 0.00 None 0% 0.00 None 0% 0.00 None 0% 0.00 None 0% 0.00 None O% 0.00 Souare Feet 317,707 Acres Total Impervious Acres 98,539 126 Development Aces 317,707 7.29 2,25 Development %I Actual Design 31% Impervious Design Use 40% DETENTION VOLUME BY THE MODIFIED FM METHOD Project: Box M Ranch USR. Basin ID: Pro lased Site Runoff (For catchments less than 180 acres only. For larger catchments, use hydrogriph routing method) (NOTE: for catchments larger than 8Q acres, CUHP hydrograph and routing are recommended) Determination of MINOR Detention Volume Using Modified FAA Method Determination of MAJOR Detention Volume Using Modified FAA Method Design information iinautl: Catchment Drainage Impervfouanees Catchment Drainage Area Pre iavelopment NRCS Soil Group Rehm Period for Detention Control Time of Concentration of Watershed Allourehde Unit Releeee Rate One -hour Precipitation Design Rainfall IDF Formula i a C1'' P,i(Ct+T) Cs Coefficient One Coefficient Two Coefficient Three 1.= A= Type = T= To = P, _ Ci C2 Ga = zoo 7.290 A 10 13 0.00_ 1.41 28.60 10 0.789 i percent acres A, 81 C, ar D Yews (2, 6.10.26, 50, or 100) r111'Ime9 cfs(acre Incites Peskin information (input): Catchment Drainage Imperviousness Catchment drainage Area Predevelapment NRCS Soil Group Return Period for Detention Control Time of Concentration at wateranea Allowable Unit Release Rate One -hot r Precipitation Design Rainfall IDF Formula i = C1' Ptt{C=+Tt"Cj Coefficient One Coefficient Two Coefficient Three id 21 Ago TIPe TN i'c = q' _ C1 - c2= 10 Ce- 0.789 2.00 percent 7290 awes A 100 13 0.00 2.89 28.50 A. B. C. or D years (2, d, 10, 28, 60, or 100) minutes ciseacre inlets Datermlnstion otA+ rpns Outflow from the Basin ICalcuiateUl; Runoff Coeficient Inflow Peak Runoff Allowable Peak Outflow Rata C- _ Qp-I n =) _ 'Qo-out • 0.07 1.73 0.0 cis cfe Determination of Averacte Outflow from the Basin (Calculated(: Runoff Coefficient Inflow Peek Runoff Allowable Peak Outflow Rate C - t -In - Op -out • 022 10.36 0.0 cis cta udfcd spreadsheet historic runoff, Muddled FM 7112/2016, 10:20AM DETENTION VOLUME BY THE MODIFIED FM METHOD Project; Box M Ranch USR Bailin JD: Proposed Site Runoff (For catchments less than 160 acres only. For larger catchments, use hydrogruph routing method) (NOTE: for catchments larger than 90 acres, CUHP hydrograph and routing are recommended) Determination of MINOR Detention Volume Using Modified FAA Method I Determination at MAJOR Detention Volume Using Modified FAA Method percent acres A, e, C. or p yen (2, Si 10, 25F W, or 100) nri:tries cfcthcre irrches Design Information (lnntstl: all CO percent Design Iritortnation iinaukl; Catchment t]rainege Imperviousness i, Catchment Drainage Area A = Predeuelapment NRCS Salt Group Type - Return Period for Detention Control T : Time of Concentration of Watershed Tc - Allowable Unit Release Rate q - One -hour Precipitation P, a 40 00 Catchment Drainage Imperviousness I. = Catchment: Drainage Area A- Predevelopment NRC$ Soil Group Type : Return Period for Detention Control T= lime of Concentration of Watershed To= Allowable Unit Release Rate q - Ones-hcUr Precipitation P1 = Design Rainfall IDF Formula I • Ci' P1f($2{TJ C Coefficient One C1 a Coefficient Twq C.+z= Coefficient Three Cr 7.290 7290 am A. B, C, art years (2, 5, 10, 25, 50, or 100) minutes cbrecre itiw_s A A 10 100 13 1$ 4.40 0.00 141 2.59 Design Rainfall IDF Formula I A C1'' Ptt(Ci+Tj"C, Coefficient One C1 = Coefficient Two Cs = Coefficient Three Cr _ 28.50 28.50 10 10 0.799 0.799 Datetrrtdnit6Cn otAverar ie (WOW troth firer Basin ica}culatedb afs Determination ofMeraae Outflow from the Basin (Calculated): Cis Runoff Coefficient C = 0.30 Runoff Coefficient Cr- Inflow Peak Run= Op -in ; Oa 1 Inflow Peak Runoff Op -In 1 7,40 Icrs 19.31 Allowable Peak Outflow Rate Up -cut is 0.0 Allowable Peak Outflow Rate Qp-out= 0.0 ester udfcd spr4edaheistapropoaod runoff, Modified FAA 7012/2018.10:13 AM1 Box b4, Ranch, LT. APPENDIX B Hydraulic Computations DETENTION VOLUME BY THE MODIFIED FAA METHOD 1 Project Box 1n Rena USR Sarin tk Pmpased DelentVon Panel (For calehmenln Zees Irian lenacrea only_ For Larger oat cements, use hydnagmph routing r.a d17n) (NOM for ca1chmente limper then 90 awes. CAI -P hydro -grips) and muting are rtcammeaded) Dntlormiertion of MINOR Oerfirlttion Volume Whig Motitlad FAA /lethal testa n*uitiana MAJOR [7elerrtilon Vdagao Uan9 Modified FAA 614ihod t]aelnn infermlllnn In r 0'• iilriian Intarnlilian trn,.rtt: Cerkiarierd MoldersFOperdwaama I.+ +43 DO iful!nt Galefimwttineite evena1olaas Ia= 40 OD percent Cat lime atOre In age. Area Aa 7;'9O aerial tolphinereDadra gip Ma A= 7290 ease I Prodneelep tort MRCS $oI flmup MiP0 = 4 4.8,10, off D PreleebprmnittRCS grail {rasp Type= A 4,g, 4 cr0 Rattled Period few Otemtlon Caned T - 13 pt s t2.O.10.25, O0, or 1001 Return Period for 0eteallen C7 itb04 T= 100 years (2, 5, Kt 25. 5.0c. ar 142) Timed too? Ortrglpn a Mlfi tired 7C= 1) iiiuiui 1711b41 Cvtrcoeftb0*4 OfWitithad Ta= 11 rnmuiaq Mowah, Vert a'#i4atog PS. CI • OM 41210.0 A1fD1YableUnit RekMcRate q— 074 dslare. QI34104 P19G1p1900r1 Pi 1 1 41 riches C7na-fourPradpnation P,'2 7110 Imhof 08410 Rant leF F61W18 le CI Pirettes Dorian Ra6t5ii Ef Fade 1= c1• P1tlCE.17a•Ca COOTTAcialtOle C. 21!50 Coefficient Me C1= 29.:0 CoeficientTrro Caa 17 CoelicfmtTea CI = 10 utFfirsientThre C.1: 0 789 Cooffelent Throe Cr' 0739 ilarnrm1o411gln of Avrrxtts f iiIII yr 1MI'8 tat8tl544 IG.I0VibiS1: lanoline Iona r e OuNlew from . e s1 Rt11atiCda18C38M C= 030 RtrOolleClelitx?n C:- 041 Mini Falk RV ONT S31-41= 1.40 C1$ Feely Pen P..unoar Op -in= 19.31 cis Moleskin Nail Cudnt hbale Op -out.- COO elk P8r7Wable Feet Datlow Rai, Op9ut = 1.77 cis 11109. FAA MOM atone IMMO• 11,120 CUBIC 1141 Mad, FAAMrler Storage- Valerie s 29,414 oink nerd Mad FAA Whom Sterner Votuw¢= OM emit Mod. FAA Maier86oragsWile ane— 0.18 east - S IG ritl- rmtrERanr.A,nn Irvin -ma -61m i1.- rit.n io lt.-.i.!.: i .‘:,s r,.. t:: eP '. kW 5-MMa frail Rannal Donee In Ilan ri 11 Weal M49rc9ity iri.lt thr IM ail `644 molt Volume 9Cr►r4GCt fan 41 Adjustinml Fedor it 'yule J. 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U' O.CO 0070 0341 180 122 asu5 1154 093 0230 3¢3E 185 083 0349 054 ado 0000 41949 195 120 0911 054 003 0229 3875 1W 081 0352 053 000 0000 0352 100 117 0911 041 107 07!4? 1817' 155 040 0.384 053 00D 0900 0351 195 115 0lR3 0;2 797 111 241 I 30l6 700 OSO 03x6 003 090 0000 4306 290 113 0929 053 002 0254 0875 2115 2'W a58 457 D358 0761 053 053 000 000 O.qn) 0000 03W 0361 203 111 0835 053 002 0260 0875 210 21$ 109 107 0 W 0018 O:7 053 092 0236 ! 0076 VS 058 D 36 053 000 0000 03$31 092 6274 0874 WI 055 036S 0 58 00D 0000 0286 WO 145 0861 0 53 082 0278 01373 ??5 0 SSl D 391 0 53 000 0 000 0 367 225 103 0066 0 5a 0 91 0261 0 573 200 053 0369 0 53 0.03 0000 43RD 250 102 0981 o;;3 0 91 0290 0873 I 235 052 0371 053 000 0000 0371 236 _ 1}0 0980 0_l 4 U 0225 0871 240 052 0 373 0 53 000 0000 0373 240 096 41171 053 0 91 0331 0670 245 431 0374 0 53 004 0000 0971 245 097 0979 083 091 911101 0549 250 255 0 fro 049 C. 373 6918 0 e; 912 a W 0.00 0 01;0 0.0W 0- 376 0378 250 765 095 'iil 0981 O08e 053 013 0 94 091 0 313 0318 0689 0600 700 048 '1300 0fJ 0 a 00493 03) 9110 3 a 0000 0.13 001 0x366 Does 285 048 0382 092 000 0000 — 03112 355 001 0095 052 091 0331 0684 x74 047 0302 052 000 0000 Q 319 270 4190 0999 D 52 091 033T 0892 275 9 46 ; 7155. C 42 000 _ 0.000 0 305 275 a 311 1 461 052 091 0 3C. 0891 260 09P 4'187 0 440 0004 11 687 280 3 97 i 004 052 091 0449 0659 486 045 8568 1792 800 0006 03x8 21150116 1018 052 0111 I2 9D da'15 4381 4/.057480 0056 045 0990 052 000 0000 0 990 200 085 1017 d $6 245 On 0391 052 000 OCO3 0 391 7,95 0134 4 024 0 K2 090 4467 4554 200 04. 02911 r. S2_ cur dao 6. 413 300 a301 1025 CI 9.2 0 O 0373 0.857 u4fcd apreaths Beet Rogow& Modified FAA. IW00. rhea MINXSUMP VCIors te.101C 1.) • 11.1110 PAM. FAAMa6r51olrpc VOtura4 (cubit R.) - M }a, EAR /iincr i45rIp8 Vultlmre tacr&A,i — 0,31120 find FAA Major sfenga *Au nes dart -R.) = UDFCD DETENTION BASIN VOLUME ES'flMlING WORKBOOKldersstn2 39. Released f oQenbler2013 29.414 OAT= 7P1213018,1014 AM i _ DETENTION VOLUME BY THE MODIFIED FAA PIETHOD I Protect Box M Ranch l}SR maw ID Ismre DOWN' lira Mind VaIuma {acre-fsst) 12 1 G_8 06 0_d 02 0 Inflow and Outflow Volumes VS_ Rainfall Duration • • I. f • 50 100 150 240 Duration Rifinutes) 250 300 350 - .Hal.(pa nleta W--. ElSaarRrn fYa!'rl..rw ll.{a Sr•— It Win amaMS= -Slam ClorCa a Kafir a— Sim HS a DORM DETENTION DAM VO{_.I.ME ESTIIAA11NG WOR}(BOOK Ver5i n 234, Released Novarber 2313 l ldhdsprvaIjill VWPrPpQ 'SWOWdFAR 17122Et1J_to11AN DETENTION VOLUME BY THE MODIFIED FM ME'T'HOD Project: Box M Ranch USR Bastre ID: 10 -Year Historic Release Rate (For catchments less than 160 acres only. For larger catchments, use hydrograph routing method) (NOTE: for catchments larger than 80 acres, CUHP hydrogmph and routing are reeoMrnended) Determination of MINOR Detention Volume Using Modified FM Method Design Information (Input): Catchment Drainage Irnpundousness Catchment Drainage Area Pradevetopment MIRCS SO Group Return Parted far Detention Control lime of Concentration of Weterehegl Allowable Unit Relaaae Rate Onencor Precipitation Design Rainfall l OF Formula I • Coefficient Crte Coefficient Two Coefficient Three t,= A= Type T To q P, 240 7.290 A 10 13 000 1.41 C, 2a 64 c2 Ca 0.789 10 wit es 4. B, C, or D leas (2, 5.10, 26, 50. or IQp) Mattes Micro nches Determination of Average Outflow from the Basin (Calculated): Ru nbft O:effioant Inflow Peak Runoff Allowable Peek Outflow Rate it Qp4n=( ills , op -O4 = 0.07 U.0 Determination of MAJOR Detention Volume Using Modified FAA Method Design Information (Input': Catchment Drainage Imperviousness Catchment Drainage Area Predevelapment NRC$ Sall Group Return Periodla Deten ib Control Time of Concentration ofWalervhed Allowable Unit Release Rate Qr,,a-hour Precipitation Design Rainfall IDF Formula Coefficient One Coefficient Two Coefficient Three I • el' Pia cetarCa Iq = 2.00 percent A = 7.290 scree Type • A B„ C, or D T.4 -00 years (2.a, 10, 28, 50, or 104) ?c = 13 minutes 4,00 /edam P, 2.89 r4nes = 26 5© Cr Ca• 0.78; Determination of Average Outflow from the Basin 1Calculatedl. Runoff Coefficient Inflow Peek Runoff' Allowable Peak Outlaw Rate 0.22 Up -in - 104 afa = 0,0 cis wiled spreedaheet_nistorie tete, Modified FAA 7/12/2018, 10:20 AM Bax M Ranch, LW APPENDIX 24 x 36 Maps l a C w IS PRIX ECT LOCAT ON; VICINITY MAP LEGEND tWfti DRAINAGE BOUNDARY PPOPERTY BOUPUAF#Y oNHECnON OF FuOW mo BLOKE ti 1 t I' 4. 1 is ,enQ f J t 44 � I se F HISTORIC DRAINAGE BASIN MAP so ION sos rot I CHID ! 1 I i 4§Mb 1 t 1 ti 1 as 4 1 N4 44. . I t St t k7' k i t f IN - r 00/ 1 PROJECT LOCATION 1 1I a s gli IM a a 1 k k t it t t I 1 I IR 5 1 1 s 9. T r '. x -,,- IC { k - 1 1 1aj 0000 J V 'a' V O W �J * a - . C - C i t-, les i CO 5i 'W t ++� V PRI P'ERS ;ulte 200, Is • fax: 0, 44 s N RAN skINAG SHE E DR-i n — AT iet v en a+ PROJECT LOCATION # Toy 4 VICINITY MAP r• DRAINAGE PLAN a a 1 r r r 3CAE:1 —2 pnp,rsin 0* 1X 0 RP sfr •tee 6n �rr6AML� fJ�4'�- -F r` r x if as rang ears* 60 r NY w _—.- — ., a am am ti --\ 0* I SOSTP4G GROUND SURFACE CO NrICAPEI AND ELEVATION, FT PROPOSED GROUNDS) ACE CONTOUR AND ELENA -Rom. FF DRANAI2E BOUNDARY Ff OPtxiY eOuNu RY EXISTING EDGE OF GRAVEL INC FENCE METAL EWING FENCE BAFIEMIRE EXISTING OVERHEAD EiECTRC EXISTING DFPCH FL MUIIF_ E*STING LETUP' POLE EALING TELE P €S & EXISTING GAR MARKER E STV4G WATER METER EXISTING YNU HYDRANT DIRECTION OF FLOW AND SLOPE PROPOSED SPOT ELEVATION x a F7Y.5 rcta �----•-tent it•!' a V.' CR 40 S tt 20. n -seer _ . ''`asp rr ��iti - - •'fj -- _..._;_. "tint 3" 1 300 _� )— CAN _ — -• , 04 e I. f I a, FPOPC$ D DETENTION POND f�. $1 14 .r k110P06EDOUTLE1 STRUCTURE a. — .a, FflW04tU PAMIR PROPCISE8 SWALE , "I }Pi ire M r i Te I 1 a at ear s or rse ss eroyn MEI -tT TT =MP raMMIME+ 4 D U c scour I -.6 6. i a a 0 E 4 1 gE _ i3.1!C ... B x aJ 8 1 ' n DEVELOPERS OF AGRICULTURE 3050 67th Avenue, Suite 200, Greeter, CO 80634 (970) 535.9318 • fax WO) 535-9854 0 inU a 44 O SHEET - DR -2 DRAINAGE REPORT REVIEW CHECKLIST Project Name: U R18-011O Box M Ranch The purpose of this checklist is to provide the applicant's Engineer a basic list of items that County Staff will review in regards to a drainage report. The drainage design shall meet the requirements of the Weld County Code and commonly accepted engineering practices and methodologies. A detention pond design (or other stormwater mitigation design) is appropriate for projects which have a potential to adversely affect downstream neighbors and public rights -of -way from changes in stormwater runoff as a result of the development project. The design engineer's role is to ensure adjacent property owners are not adversely affected by stormwater runoff created by development of the applicant's property. REPORT ( o = complete, ❑ = required) Stamped by PE, scanned electronic PDF acceptable Certification of Compliance X ❑Variance request, if applicable Description/Scope of Work Number of acres for the site Methodologies used for drainage report & analysis Design Parameters 0 Design storm — see 3.h below 0 Release rate — see 3.h below x X URBANIZING or NON -URBANIZING ElOverall post construction site imperviousness — see 1 below Soils types Discuss how the offsite drainage is being routed — see 3.b below Conclusion statement must also include the following: Indicate that the historical flow patterns and run-off amounts will be maintained in such a manner that it will reasonably preserve the natural character of the area and prevent property damage of the type generally attributed to run-off rate and velocity increases, diversions, concentration and/or unplanned ponding of storm run-off for the 100 -year storm. How the project impacts are mitigated. Construction Drawings Drawings stamped by PE, (scanned electronic PDF preferred) Drainage facilities Outlet details Spillway Maintenance Plan Frequency of onsite inspections Repairs, if needed Cleaning of sediment and debris from drainage facilities Vegetation maintenance Include manufacturer maintenance specifications, if applicable Comments: xi xl x x X x x 1. When calculating the weighted C value for the proposed site, please model the pond water surface area using a 100% impervious value. 2. On Page 6, 9, and 11 the report indicates that the pond is on the southern portion of the site. It appears from the drawings that the report is located on the north east corner. Please update the report or the drawings so the location is consistent. 4/11/2018 Weld County Department of Public Works) Development Review 1111 H Street, Greeley, CO 80631 P h : 970-400-3750 Fax: 970-304-6497 www.vreldgov.comldepartments/publicworks/development review/ DRAINAGE REPORT REVIEW CHECKLIST 3. Given that the drainage report submitted was conceptual in nature, for future submittals of the final drainage report, please include the following: a. Include time of concentration calculations. If using the UD-Rational worksheet, this is an acceptable way to show the calculations. b. Please provide a detailed grading plan showing contours of the proposed pond, site grading and any other necessary drainage swales or berms. Show grading to reroute offsite flows around the site. c. Please provide a stage storage table for the proposed pond based on graded contour data, showing the WQCV elevation and 100 -year WSEL. L. d. An outlet structure with an orifice for water quality and a separate plate/orifice for detention release will be required (the report mentions the detention orifice but does not have design information). Please provide design and drawing details of the final structure. e. Please include the design and details for the emergency spillway. Emergency Spillway design standards are in the Weld County Code. i. Sec 23-12-90.A.6.- Each detention pond shall contain an emergency spillway capable of conveying the peak 100 -year storm discharge draining into the detention pond. The invert of the emergency spillway must be equal to, or above, the 100 -year water surface elevation. The depth of flow out of the emergency spillway shall be less than 6 inches. The spillway must have effective erosion protection. In order to protect the emergency spillway from catastrophic erosion failure, buried riprap shall be placed from the emergency spillway downhill to the embankment toe of slope and covered with 6 inches of topsoil. The riprap must be sized at the time of final engineering design. Grouting of the riprap may be required. ii. Sec 23-12-90.A.7.- In order to prevent damage to publicly -owned infrastructure (roads, roadside ditches), a concrete cutoff wall 8 inches thick, 3 feet deep, and extending a minimum of 5 feet into the embankment on each side of the emergency spillway opening, is required on all privately -maintained detention ponds and required on all regional detention ponds. The concrete cutoff wall permanently defines the emergency spillway opening. The emergency spillway elevation must be tied back into the top of the embankment using a maximum slope of 41 f. This site is fairly flat so swales/culverts may not be used on the site, however, if swales are proposed, please provide additional calculations for swales or culverts necessary to transport site flows to the detention pond or other major drainage area on -site. Swale and culvert calculations should be provided for off -site flows being routed around the site as required. i . Swales es should be sized to convey the 100 -year developed or historic flow plus freeboard. ii. The requirement is a foot of freeboard for flows over 50 cfs. iii. For flows under 50 cfs, 1.33 x the design flow may be used. In the report text there is a reference to using the 10 -year, 1 -hour storm for culvert sizing on the site. The standard quoted in the report is for roadway designs. For site designs, the engineer needs to size the culverts and swales such that all site runoff from the 100 -year, 1 -hour storm can safely make it to the pond without discharging off -site. h. The Urban Drainage worksheets are being used for design. Include the whole worksheet for the detention volume sheet. Use the UD-Rational worksheets for historical and developed runoff calculations. 4/11/2018 Weld County Department of Public Works) Development Review 1111 H Street, Greeley, CO 80631 P h : 970-400-3750 Fax: 970-304-6497 www.vreldgov.comldepartments/publicworks/development review/ DRAINAGE REPORT REVIEW CHECKLIST 4. Once the revised design and drainage report have been submitted, the County may provide additional comments in addition to the ones listed above. Depending on the complexity of the changes made, a full 28 -day review period may be required. 5. Please provide a written response on how the above comments have been addressed when resubmitting the drainage report. Thank -you. 4/11/2018 Weld County Department of Public Works) Development Review 1111 H Street, Greeley, CO 80631 P h : 970-400-3750 Fax: 970-304-6497 www.vreldgov.comldepartments/publicworks/development review/ AGPROfessionals DEVELOPERS OF AGRICULTURE Traffic Narrative Box M Ranch, LLC Use by Special Review (USR) Application The subject property is located on the northwest corner of Weld County Road (WCR) 40 and WCR 55. The proposed pipe laydown yard will allow up to ten (10) semi -tractor trailers, ten (10) 5 -ton trucks, and two (2) employee vehicles to visit the site each day. The semi -trucks and 5 -ton trucks will bring pipes and equipment to the site to be stored and will also deliver pipes and equipment from the site to oil and gas operations in the area. Traffic will be dispersed throughout the day and will depend on market demand for laydown yard services. Truck drivers will remain on -site for less than 2 hours at a time. Up to two (2) full-time employees are proposed to remain on site during business hours. Employee parking will occur during the primary hours of operation from 6:00 A.M. to 5:00 P.M., Monday through Friday. Occasional operations outside of the primary hours may be required due to oil and gas industry service needs. Improved gravel surfaces are proposed for the laydown yard and parking area. Parking for four (4) employee vehicles is proposed. As the parking area is gravel, striping and specific parking spaces are not specified. This facility is not open to the public. The existing access to this property is located on WCR 40 approximately 860 -feet west of WCR 55. WCR 40 is a local gravel road, W0R 55 is a local gravel road, and WCR 53 is a paved collector. Trucks will exit the site on WCR 40 west to \NCR 53 for north -south travel. It is expected that 50% of traffic will come from the north and 50% will come from the south on WCR 53. Travel routes will depend on the location of the oil and gas projects serviced by the site. Typical vehicles accessing the site include employee and owner vehiclesr semi -trucks, and 5 - ton trucks. The following numbers are expected for this facility: Semi -tractor trailers: 5-10 roundtripsfday 5 -ton trucks: 5-10 ro u nd tripsfd ay Employee vehicles: 1-2 roundtripslday The highest traffic volumes are expected to be generated during morning hours between 6:00 A.M. and 7:00 A.M. but will depend on the needs of oil and gas projects serviced by the site. ENGINEERING, PLANNING, CONSULTING & REAL ESTATE 3050 67th Avenue, Suite 200 ❑ Greeley, CO 80634 970.535.9318 /office O 970.535.9854 / fax ❑ www.agpros.com Hello