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Home My WebLink About20194219.tiff 174-17 - .� USE BY PEC IAL REVIEW (U APPLICATION 1,1 A t ! t, , , � , ' '13 DEPARTMENT OF PLANNING SERVICES * 1555 N. 17TH AVENUE * GREELEY, Co 80631 ffi .T } ._,. . i . I www.weldgov.com * 970-400-6100 * FAX 970-304-6498 FOR PLANNING DEPARTMENT USE: DATE RECEIVED: AMOUNT CASE # ASSIGNED: APPLICATION RECEIVED BY PLANNER ASSIGNED: 1 2 0 9 0 1 0 0 0 0 4 0 - Parcel Number*; �. __— _I— - ...._..�.. - - .,. {*A 12 digit number on Tax I.D. information, obtainable at ! Address of site: 17461 CR 25, Platteville, Co 50651 . . . . . wrrydgov. m}. Legal Description: N2 SE4 EZS 41 -3-67 EXC BEG SW CORE Section : 1 -...._ Township: 3 N Range: 67 W Zone District: AG Acreage: 15 I Floodplain : V N Geological Hazard: Y. N Airport Overlay: V N FEE OWNER(S ) OF THE PROPERTY: Name : G. Todd McCormick Company: Phone #: 970-785-6586 Email: toddmccormick7@gmall.com Street Address: 17461 County Road 25 City/State/Zip code: Platteville, CO 80651 Name: Company: Phone #: Email: Street Address: City/State/Zip Code: Name: Company: Phone #: Email: iSIIISSIMnIabiNsifessIs ,d• Street Address: City/State/Zip Code: APPLICANT OR AUTHORIZED AGENT: (See below: Authorization must accompany all applications signed byfAuthorized Agents) Name: Michael McCabe Company: Oak Leaf Solar 40 LLC Phone #: 303-893M945 Email: mike@oakIeafep.com 1 r11_ Street Address: 2645 E 2nd Ave. Suite 206 City/State/Zip code: Denver, CO 80205 PROPOSED USE: Small Scale Solar Garden I e) hereby depose and state under penalties of perjury that all statements, proposals, and/car 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 applicatio 71f an Authorized Agent signs, a letter of authorization from all fee owners must be included with the application. If a corpor i n is the fee owner, notarized evidence must be included indicating that the signatory has to legal a ity " r orporation. July 3, 2019 _ Si r : 0 ner or A thorized Agent Date Signature: Owner or Authorized Agent Date Michael McCabe Print Name Print Name Rev 4/2016 DEPARTMENT OF PLANNING AND BUILDING DEPARTMENT OF PUBLIC HEALTH AND ENVIRONN E T -w a�'�� 17TH (''� 1 555 NORTH AVENUE 1 St 1-46: 1:4 GREELEY, CO 80631 is = IIIISSIMPureai 1 -Lr, VI 1 riWIN ii '' S . : a NI . j I — 11 ia COUNTY AUTHORIZATION FORM F Todd McCormick give permission to Oak Leaf Solar 40 LLC (Owner a please print) (Authorized Agent a please print) to apply for any Planning, Building or Septic permits on our behalf, for the property located at (address or parcel number) below: Up to 15 acres of the southern portion of parcel 120901000040 N2SE4/E2SW4 1 -37667 EXC BEG SW COR E2SW4 E947' N200' NWIY 1000' S4601 TO BEG ALSO EXC THAT PT LYING kAI OF Legal Description: N MUTU L .�� D) of Section 1 # Township 03 N, Range 67 VV Subdivision Name : NIA Lot NIA Block N/A Property Owners information : Address: 17461 County Rd . 25 Platteville, CO 80651 Phone: 970-785-6586 Eft mail: Authorized Agent Contact information : Address: 2645 E 2nd Ave. Suite 206 Denver, CO 80206 Phone: 720-739-74113 E-Mail: ike@oakieafep_com; eli©oekleafep.00m Correspondence to be sent to : Owner Authorized Agent Both_ , by Mail Email Additional Info: Owner Signature: Date: : , owner Signature: r _ Date:-iii Oak Leaf Solar 40 LLB - McCormick 2 Solar Garden 1 Planning Questions 1 . 1 Explain, in detail, the proposed use of the property. • Oak Leaf Solar 40 LLC proposes to construct a 2 MWDc solar garden on approximately 12 acres of land near the Town of Platteville , on a site which currently lies dormant . The solar garden will generate approximately 3 ,950,000 kWh annually, about the equivalent of 400 homes . • The solar array will deliver electricity to Xcel Energy for 20-30 years through the company ' s " Solar Rewards*community" program and will be interconnected by June 30, 2020. • The panels will be supported by a racking system attached to piers that will be driven at least 5 ' into the ground . The solar modules and the frames supporting them have been designed to withstand a 120- mile per hour wind load and a 25 pound per square foot snow load . Inverters will be provided to transform the direct current ( " Dc " ) power to alternating current ( " AC " ) . The solar garden will be connected to the Xcel Energy ' s distribution network. • The solar garden will be enclosed in a wildlife-friendly fenced area and will not create any noise disturbances to surrounding neighbors . The panels will sit approximately 8 feet off the ground and will be mounted on a single axis tracker. The solar panels will not reflect sunlight as the panels , by definition , absorb the sunlight to create electricity . Our project team has built four solar projects at Denver International Airport and one at the Greeley-Weld County Airport and the Federal Aviation Administration ( " FAA►" ) has concluded reflectivity is not an issue . We would like to construct the facility beginning in Q4 2019 . The construction should take no more than 4 months , The facility would be in place for 30 years . • The construction and operation & maintenance (O &M ) crews will access the site from the West via Weld County Road 36 . We anticipate as many as 10 semi-truck loads of equipment per week will be delivered during the three-month construction period . In addition , crews in passenger vehicles and bobcat skid steer loaders on tracks will be on-site almost every day during construction . O &M crews will access the site twice a year using pickup trucks . • The facility will be maintained twice per year by qualified solar O &M crews. In addition to maintaining the solar system components , maintenance activities will include visually inspecting the fence to ensure it is free form obstructions and remains firmly planted in the ground . Crews , on an as needed basis , will cut or trim the native grasses . The solar garden facility is monitored remotely through a sophisticated data acquisition system ( DAS ) so if there are any problems a technician will be dispatched to investigate and resolve the problem. Paget of 14 Oak Leaf Solar 40 LLC - McCormick 2 Solar Garden 1 . 2 Explain how this proposal is consistent with the intent of the Weld County Code , Chapter 22 of the Comprehensive Plan , • Section 22-2- 70 of the Weld County Code describes the intent of the industrial goals is to establish industrial areas where a balance , diversified economy can be encouraged in an effort to maintain and enhance the quality of life of Weld County citizens . These Goals and Policies intent to assure desirable local employment opportunities and to strengthen and stabilize the economy • Section 22-4-40 of the Weld County Code describes allowing development that encourage clean air and emissions of hazardous pollutants . This development uses solar power and converts it to electrical power. This development will not discharge any air emissions into the atmosphere or cause any dust or odor. • Section 22-4-60 of the Weld County Code describes how noise shall be considered . This development will not generate any perceivable noise and therefore complies with this development requirement . • Section 22-480 of the Weld County Code describes how waste shall be considered . This development will not generate regular waste from the production of electrical energy and therefore complies with this development requirement . • Section 22-5- 110 and 22-5- 120 NR Goal 5 of the Weld County Code describes that other natural resources shall be utilized . The proposed solar array is a renewable natural resource that would be supported by these sections and code requirements . • Section 22-5- 130 of the Weld County Code specifically describes that Weld County supports and encourages the use of Alternative Energy Resources . Weld county does not intend to replace traditional sources of energy, but supports the expanding of the " New Energy Economy" to support and enhance traditional sources of energy . This development is considered an Alternative Energy Resource and shall be supported by Weld County . 1 . 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 Agricultural zone is intended to protect the valuable resource (farmland ) from adverse impacts resulting from uncontrolled , and undirected business , and retains the discretion to be used for Use by Special Reviews , should the proposed development have a potentially greater impact than allowed by Use by Right. Small scale solar is a non-permanent, controlled and directed use of this land consistent with Section 23-3-40NN as a Use by Special Review for a Smal- Scale Solar Facility . Page 3 of 14 Oak Leaf Solar 40 LIC - McCormick 2 Solar Garden 1 . 4 Describe what type of land uses surround the site . Explain how the proposed use is consistent and compatible with surrounding land uses . • The property is currently used for agriculture . The owner of the land on which we are constructing this solar facility was encouraged by the possibility of generating more income on his land than he currently is by cultivating a crop . This is a temporary use and we have requested a letter from our landlord confirming that he is interested in taking this land " out of production " . When our lease is up , the land will be returned to the same condition as it is currently and can once again be used for agriculture if so desired by the owner. 1 . 5 What are the hours and days of operation ? ( e . g . Monday thru Fricay 8t00 a . m . to 5 : 00 p . m . ) • During construction , crews will be on-site from 7am-6pm . After construction , the site will not be manned but the solar garden will generate electricity during daylight hours . Operations and maintenance crews will be on-site twice annually for about 4 hours per day . 1 . 6 List the number of full time and / or part time employees proposed to work at this site . • During the construction phase , there will be up to 20 people per day on site . After the system is built, no employees will be on -site with the exception of 1 -2 operations and maintenance personnel who will be on-site twice annually. 1 . 7 If shift work is proposed include the number of employees per shift , • Not applicable - this is an un-manned facility . 1 . 8 List the number of people who will use this site . Include contractors , truck drivers , customers , volunteers , etc . • During the four-month construction period , there will be up to 20 people on site at any one time . This construction crew consists of project managers, laborers , electricians , civil contractors , etc . After construction , there will only be personnel on-site twice annually for approximately four hours per day in a light pickup truck. • The site is monitored remotely for security, and a fence will enclose the facility . 1 . 9 If this is a dairy , livestock confinement operation , kennel , etc . , list the number and type of animals . • Not Applicable Page 4 of 14 Oak Leaf Solar 40 LIC - McCormick 2 Solar Garden 1 . 10 Describe the type of lot surface and the square footage of each type , ( e . g . asphalt , gravel , landscaping , dirt , grass , buildings ) • 12 acres is approximately 520 ,000 square feet , 60% of which will be covered by solar panels residing on driven piers . We will seed the ground after construction with a native , low growth grass . Negligible impervious area will be added to the site . 1 . 11 How many parking spaces are proposed ? How many handicapped ( ADA ) parking spaces are proposed ? • Not Applicable . The site is un-manned 1 . 12 Explain the existing and proposed landscaping for the site . • The existing landscape for the site is agriculture . • Oak Leaf proposes using a decorative wildlife friendly fence to enclose the area as well as low growth decorative native grasses in between all the panels and around the side of the array. There are existing large trees to the South which obstruct the view of the development from the adjacent home . • Our firm has conducted rigorous , aeronautical grade studies of the glare these types of panels might generate in relation to drivers and passersby , and the results showed the effect was negligible . (Of note , the referenced study was for a high trafficked road with an array immediately adjacent to an intersection , the explanation for this result is that solar panels produce energy by way of the absorption of light , so it stands to reason that any reflection is essentially wasted energy . For this reason, the panels are specifically engineered to reflect as little as possible . • Grass will be mowed on an " as needed " basis. Landscaping will be minimal and will be kept in a suitable condition for the area and to support the operation of the solar facility. 1 . 13 Describe the type of fence proposed for the site ( e .g . 6 - foot chain link with earth tone slats ) • The proposed fence is Colorado Parks and Wildlife ' s preferred , decorative "wildlife friendly " fence , 8 ' tall with a smooth top wire. 1 . 14 Describe the proposed screening for all parking and outdoor storage • As detailed above , there is no landscaping proposed due to the isolated nature of this site . Furthermore , there is no parking or outdoor storage proposed for this site thus this screening is not applicable . Page 5 of 14 Oak Leaf Solar 40 LLC - McCormick 2 Solar Garden 1 . 15 Explain any proposed reclamation procedures when termination of the Use by Special Review activity occurs . • Upon termination of the lease (30 years from Commercial Operation Date ) , Oak Leaf or the owner of the facility will remove all improvements and either recycle , reuse or repurpose the materials . No initial grading of the site is proposed , so the contours will be left as is . Any disturbed land will be reseeded with a native dryland seed and allowed to re-establish into the surrounding landscape . 1 . 16 Who will provide fire protection to the site ? • Fire protection will be provided by Platteville-Gilcrest Fire Rescue , located at 303 Main St, Platteville , CO 80651 ( Platteville Station # 1 ) and 14679 WCR 42 , Platteville CO 80651 (Gilcrest Station # 2 ) 1 . 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 . • Driveway installation and site area grading December 1 , 2019 - January 15 , 2020 • Seeding /Mulching and Site Stabilization January 16 , 2020 - February 1 , 2020 • Solar Garden Component Delivery February 2 , 2020 - March 2 , 2020 • Perimeter Fence Installation February 2 , 2020 - March 2, 2020 • Solar Panel Foundation Installation March 3 , 2020 - April 1 , 2020 • Transformer and Inverter Installation April 2 , 2020 - May 1 , 2020 • Solar Panel Installation April 15 , 2020 - June 1 , 2020 2 Engineering Questions 2 . 1 Describe how many roundtrips/ days are expected for each vehicle type : Passenger Cars / Pickups , Tandem Trucks , Semi - Truck/Trailer/ RV ( Roundtrip = 1 trip in and 1 trip out of site ) Page 6 of 14 Oak Leaf Solar 40 LLC - McCormick 2 Solar Garden rabic I ['eJlicfe Trip Gcrrowlrcarr Project Phase Vehicle Type Estimated Gross Number of Vehicles Maximum and (Time Period) Vehicle Weight Per Day Average Vehicle Trips Per Day Site Preparation Equipment Hauling 30,OOU-85,000 Ibs 0-2 0-4 (approx. 4-6 weeks) Trucks Passenger Vehicles 2 ,aao - 1o, aop lbs 2-5 4- 10 Fuel Delivery 20,000-34,pOp lbs 1 2 Max — 161Ave - 6 Material and Cortex Container and 30,004-50,000 lbs 5-15 10-30 Equipment Delivery Delivery Trucks (approx. 4 weeks' Equipment Hauling 2Q000-40,000 lbs 0-4 0-8 Trucks Matt — 38/Ave - 1 Q Solar Garden Passenger Vehicles 27000 to 10,000 lbs 10-15 20-30 Installation (4-5 months) Fuel Truck 20 ,000 to 30 ,000 lbs 1 2 MateriaC Delivery 20 ,000 to 30,000 lbs 1 2 Truck Max — 34/Ave - 24 Operations Utility Vehicle 2,000 to 10,000 lbs 1 per month or less (ongoing once operational) Max - 2/Ave • 4 2 . 2 Describe the expected travel routes for site traffic . • Site access is from the North off WCR 36 , and thus is expected to come from HWY 85 , then on WCR 36 , arriving at the site . 2 . 3 Describe the travel distribution along the routes ( e . g . 500 of traffic will come from the north , 20% from the south , 30% from the east, etc . ) • Traffic distribution is expected to be 95% from Highway 85 as described above and less than 5% from any other route . Page 7 of 14 Oak Leaf Solar 40 LLC - McCormick 2 Solar Garden 2 . 4 Describe the time of day that you expect the highest traffic volumes from above . • During construction , it is anticipated that the delivery traffic will access the site throughout the day between 7 :00am and 7 :00pm . • Post construction , it is anticipated site visits will be performed during business hours . 2 . 5 Describe where the access to the site is planned . • It is expected that the main site access will be via a County Rd . 31 , approximately 0 . 15 miles North of the intersection of WCR 36 and WCR 31 . No additional road work is proposed at this time . 2 . 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 23- 12-30 F . 1 . 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 offsitesource 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 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. • See attached Drainage Report for answers to the above questions 3 Environmental Health Questions 3 . 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 Page s ur 14 Oak Leaf Solar 40 LIC - McCormick 2 Solar Garden 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 . • Since this is an un- manned facility a domestic water tap is not needed . Bottled water will be provided during construction . 3 . 2 What type of sewage disposal system is on the property ? • Since this is an un- manned facility , no septic system is proposed . Port-A-Potty ' s or other temporary sanitary sewer facilities will be provided during construction . 3 . 3 If storage or warehousing is proposed , what type of items will be stored ? • No storage or warehousing is proposed . 3 . 4 Describe where and how storage and / or stockpile of wastes , chemicals , and /or petroleum will occur on this site . ' There will be no stockpiles of waste , chemicals or petroleum on site . Because this is an un-manned facility , no trash service is needed . During construction , trash will be collected in approved receptacles and disposed of properly. 3 . 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 . • There will be no fuel storage on site . 3 . 6 If there will be washing of vehicles or equipment on site indicate how the wash water will be contained . • Not applicable . No vehicle or other washing facilities are proposed . 3 . 7 If there will be floor drains indicate how the fluids will be contained . • Not applicable . No structures are proposed . 3 . 8 Indicate if there will be any air emissions . (e . g . painting , oil storage , etc . ) • Not applicable . Since this is an un -manned facility, workers will be on site only 1 -2 times per year, and thus only emissions generated by a normal pickup truck could be attributed to the site . Page 9 of 14 Oak Leaf Solar 40 LLC - McCormick 2 Solar Garden 3 . 9 Provide a design and operations plan if applicable . ( e .g . composting , landfills , etc . ) • Not applicable . Since this is an unmanned facility, the only " operation " is the production of energy via the solar panels . 3 . l0Provide a nuisance management plan if applicable . ( e . g . dairies , feedlots , etc . ) • Not applicable . No cows on site , just solar panels . 3 . 11 Additional information may be requested depending on type of land use requested . • Understood 4 Building Questions 4 . 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 . • Not applicable . No permanent structures are proposed with this development. 4 . 2 Explain how the existing structures will be used for this USR . • Not applicable . No existing structures exist on site , and none are proposed for this development. 4 . 3 List the proposed use ( s ) of each structure . • Not applicable . No existing structures exist on site , and none are proposed for this development. 5 Supplemental Questions for Oak Leaf Solar 40 LLC USR Application 5 . 1 The Planning Commission and Board of County Commissioners shall consider the following criteria in making their determination in approving or denying a Special Review Permit for a Solar Facility in addition to those criteria enumerated in Chapter 23 , Page m of 14 Oak Leaf Solar 40 LLC - McCormick 2 Solar Garden Article II , Division 4 and its impact on prime agricultural land which is defined as soils with agricultural capability classifications of I , II and III as indicated on maps completed by the U . S . D . A . Natural Resource Service . • See attached NCRS Soils Report 5 . 2 A Decommissioning Plan . Adequate financial assurance to cover the decommissioning of the facility may be required as a condition of approval of the Decommissioning Plan . • See attached Decommissioning Plan 5 . 3 Landscaping is extremely important for enhancing the quality of development in the area . Trees , shrubs and other plantings add greatly to the aesthetic appeal while reducing glare . As no single landscaping plan can be prescribed for all developments due to differing land features , topography and soils , these guidelines encourage flexible and creative landscape designs . Landscaping / screening shall include , at a minimum , decorative fencing , berming , and / or vegetation such that the facility is aesthetically pleasing as viewed from adjacent properties and rights - of-way . • The landscape design for this development will match the surrounding industrial areas . The fence shall be an 8 ' Colorado Parks and Wildlife ( " CPW " ) preferred , decorative wire fence with a smooth wire on top . We also propose seeding the entire property with decorative low growth native grasses which help the site blend into the landscape . Finally, there are pre-existing large trees to the south end which act as a buffer between the adjacent home and the solar array. • It is not anticipated that this land will see substantial development in the next 20 years and during the decommissioning phase the fence will be removed . Due to Page 11 of 14 Oak Leaf Solar 40 LLC - McCormick 2 Solar Garden the limited future development and removal of facility , the proposed fence shall be wildlife friendly and galvanized and no trees and shrubs will be planted . 5 . 4 All reasonable alternatives to the proposed location have been adequately assessed , and the proposed action is consistent with the best interests of the people of the County and represents a balanced use of resources in the affected area . • This project will provide energy to the residents and businesses of Weld County . This site was selected following an exhaustive search of property which to align the discreet set of technical design and geographic criteria and best serve the needs of these energy consumers . Due to the isolated nature of the site , activity in the region and on adjacent sites , this site is ideally suited for a project of this scale to serve the interests of Weld County residents . 5 . 5 The nature and location or expansion of the facility will not unreasonably interfere with any irrigation systems on or adjacent to the solar facility . • The landowner has elected to take a portion of his land out of production as he currently needs to lease water rights to irrigate this area . On top of that, the revenue he is able to generate from selling his crop is diminutive relative to the lease revenue he will realize from hosting this solar facility . Additionally, this is a temporary use of this property, and as stated by the attached decommissioning plan , Oak Leaf Solar 41 LLC will be responsible for returning the land to its original state , thus it could be used for agriculture again in the future if determined prudent by the landowner. 5 . 6 No outdoor storage of any materials and equipment , including but not limited to solar panels and support structures which are not in use , will be allowed . • No permanent outdoor storage will be proposed with this development . All material or equipment will be brought to the site and removed during each visit . 5 . 7 A Property Maintenance Plan is required for the facility . The Property Maintenance Plan shall address dust , weeds and erosion . The property shall be maintained in such a manner as to control dust , weeds and drainage that could cause erosion . • A long-term operations and maintenance plan for the project will be put in place , which includes maintenance of the grounds . The standard practice is to seed the Page 12 of 14 Oak Leaf Solar 40 LLC - McCormick 2 Solar Garden property with native, low growth grasses to prevent shading of the array and minimize maintenance . • Mowing and trimming operations will occur annually, or as needed to prevent the site from looking unmaintained . Page 13 of 14 kt--It sr Oa 1 - i ENERGY PARTNERS Mr. Michael McCabe Oak Leaf Solar 40 LLC 2645 E . 2nd Avenue, Suite 206 Denver, CO 80206 July 3, 2019 Ms. Angela Snyder Planner 1 Weld County Department of Planning Services 1555 N 17th Ave Greeley, CO 80631 Transmitted via electronic FTP site, Oneliteb. com Re : Application for Oak Leaf Solar 40 LLC, also known as McCormick 2 Solar Garden (Pre- App 19- 00101 Use by Special Review, Subdivision Exemption and Recorded Exemption Applications Dear Ms. Snyder, Oak Leaf Solar 40 LLC appreciates your ongoing support in readying these application submittals for Use by Special Review, Recorded Exemption and Subdivision Exemption. Attached you will find all relevant documents based on the application form, the Procedural Guide Checklist, and the surrounding correspondence between the Planning Services Department and Oak Leaf Solar 40 LLC . Our organization recognizes the next step in this process is a 7-day completeness review and look forward to what will hope will be positive feedback.. Should you have any questions, please do not hesitate to contact me (303 -893- 6945 I mike@oakleafep.com) or my colleague, Taylor Henderson (303-815 -6080 1 thenders on@outshine.energy) . Thank you, i Ci 1 Cabe Oak Leaf Energy Partners 2645 E . 2nd Avenue, Suite 206 Denver, CO 80206 L. —I 0 - k leaf ,.L . ENER• a- GI1 PARTNERS Decommissioning Plan - small scale solar USR McCormick 2 solar Garden Oak Leaf solar 40 Luc JuI 9 , 2019 F . — *et I 4 J . mi 1 III - - r I I aLa S 44I' 4 III 4 _•ligaligethilki<Ii:whit e I Sir ; In f A it 6 I, Y -et i . u 1. !t1 I u' �. 0 p J • i Y. ■ r0. , • a 4 Ill e I il 1 f, ,II A I R'-�- , hd 18 I E e u eke_ • a r I ii ll fi : v k .. .w Id - ill I III 91 a I.., , ! fe �0 "' I^r H Ti •• ... ti, *Iii-'s9 N II' ` . - 9 • 4114 it it ,i I n a tI I , i II O , ll . . e - I II i I 0 rf j It f ll • o- . or I 1 , M 1 iiiji I pIk 11 A •� _ q d u --- - alb • • A • — 1 t,_ �., -f d1 n1�i, .. . E..' .a 0 s IN _ tl I I _ I 7 Oak Leaf Energy Partners 2645 E . 2nd Avenue , Suite 206 Denver/ CO 80206 McCormick 2 Solar Garden - Oak Leaf Solar 40 LLC 1 Introduction As a condition of approval of the Use by Special Review, Weld County requested Oak Leaf Solar 40 LLC (Oak Leaf) submit a Decommissioning Plan for the Oak Leaf solar facility to the Department of Planning Services for review and approval . The Decommissioning Plan includes a detailed plan with time frames or milestones aftertermination of operations for restoring the property to the conditions that existed prior to the plant construction . The useful life of the solar plant is expected to be 25-years or more. At the end of useful life, Oak Leaf will suspend operations and decommission the plant including necessary demolition and site reclamation . The purpose of this document is to establish a detailed plan for decommissioning and reclamation activities after the useful life of the facility has ended . Refinement of these activities will be required to reflect the future best practices or improvements are discovered by the solar industry during the life of the facility. It will be necessary to update and fi nalize this demolition and reclamation plan . We have assumed that the planning process would be initiated one or two years prior to the anticipated end of commercial operation . The final plans will be developed in consultation with the Weld County and/or other applicable agencies that have jurisdiction of activities in the decommissioning process . 2 Decommissioning Facility Elements and Milestones The key tasks of the facility are divided into related activities that represent milestones in the process. We describe the activites in each of the tasks in more detail below. The key facility components to be affected by decommissioning activities are discussed below. In general, decommissioning would attempt to maximize the recycling of all facility components . Specific opportunities for recycling are discussed below in the context of various site components. The individual facility components to be decommissioned will be recycled to the maximum extent practicable or removed from the site and disposed of at an appropriately licensed disposal facility. The general decommissioning approach would be the same whether a portion of the facility or the entire facility would be decommissioned . The activities involved in the facility closure will depend on the expected future use of the site . Certain facility equipment and features may be left in place for future uses, such as transmission facilities, roads, and drainage features . At the time of decommissioning, a plan will be submitted to the County proposing the equipment that will be removed and, if applicable, equipment that will remain, based on expected future use of the site. Pre-closure activities, include final closure and reclamation planning, that identifies measures to be taken to restore the site to near pre-construction conditions or compatible with surrounding land and land use that may have evolved during the period the plant is in service. This includes several activities; • Set up and document a site-specific health and safety plan and determine the specific sequence and procedures to be followed . Page 2 of B r I I McCormick 2 Solar Garden - Oak Leaf Solar 40 LLC • Complete an analysis of the facility materials and their composition to identify those specific components that may be recycled, scrapped, or sent to disposal sites . Identify specific recycling facilities and disposal sites for materials . • Coordinate with local officials to develop plans for the transportation of materials and equipment to and from the site. • Develop specifications for demolition and reclamation, which will serve as the basis for contractor bids for the decommissioning facility and establish the scope of demolition and reclamation, including developing reclamation plans in compliance with local, state, and federal regulations. • Develop training for the personnel who will manage and perform the actual work. Document the performance or training. During the planning process Oak Leaf will brief the County and other applicable agencies on the decommissioning process and plans. The permits and approvals required for the decommissioning will be identified and permits will be obtained prior to commencing operations. The first step in the decommissioning process would be to assess existing site conditions and prepare the site for demolition. Site decommissioning and equipment removal is expected to take a year. Therefore, access roads, fencing, some electrical power, and other facilities will temporarily remain in place for use by the decommissioning workers until no longer needed . Demolition debris will be placed in temporary onsite storage area( s ) pending final transportation and disposal and/or recycling according to the procedures listed below. A plan for de-energizing portions of the facility to allow safe decommissioning and formal lock out and tag out procedures will be implemented . This will ensure all electrical components are placed and maintained in a safe condition for demolition activities prior start of work. PV Module and Tracker Removal and Recycling During decommissioning, facility components that are no longer needed would be removed from the site and recycled or disposed of at an appropriately licensed disposal facility. The first operation is to disconnect and remove modules from the tracker assemblies. Modules are segregated for transportation to the manufacturers nearest storage facility . Next comes the disassembly of the tracker and mounting structures, DC wiring materials, and combiner boxes. The material will be segregated for disposal or salvage . Steel piles that support the PV racking system will be removed . Below ground portions of the supports will either be removed or cut off at least two feet below ground surface and left in place . The demolition debris and removed equipment may be cut or dismantled into pieces that can be safely lifted or carried with the onsite equipment being used. The debris and equipment will be processed for transportation and delivery to an appropriately licensed disposal facility or recycling center. Modules will be recycled or disposed of in accordance with applicable laws at the time of decommissioning . Page 3 of 6 (10) McCormick 2 Solar Garden - Oak Leaf Solar 40 LLC Internal Power Collection System The combiner boxes that convey DC power generated from the solar arrays will be dismantled . The inverters that convert the DC power to AC power and the transformers that convert the output of the inverter and convey the power to the substation will also be dismantled and removed. The underground cable/collection lines that are 4 feet or shallower will be removed from the site . The cast-in-place concrete foundations of the transformer and inverter skids and switchgear will be broken up, removed and recycled . Any overhead portions of the collection system will be removed . Overhead conductors will be removed from the poles, and the poles and pole foundations will be removed . Aluminum from the conductors will be recycled or removed from the site to an appropriately licensed disposal facility. If not planned for other use, the utility interconnection will be deactivated and restored to the extent agreed upon with the local utility or to the point of change of ownership. Medium voltage collector system electrical components will be electrically disconnected and made safe for removal . The switches will be disassembled and removed from the site . The underground conduit and metal dead- end structures will also be disassembled and removed . Concrete foundations for equipment will be broken up and removed from the site, as will the grounding grid and aggregate rock. Steel, aluminum, copper and other materials will be temporarily stockpiled at or near a designated processing location pending transport to an appropriate offsite recycling facility. All metals will be recycled to the extent practical given the recycling options available at the time of decommissioning. Roads Onsite access roads will remain in place to accomplish decommissioning at the end of the facility's life. At the time of decommissioning, if the roads will be beneficial for future use of the site; those roads may remain after decommissioning. Roads that will not be used will be restored during contouring operations at the end of the process. Fencing Facility site perimeter fencing will be removed at the end of the decommissioning facility, unless it may be utilized for future use of the site. Since the facility site was not originally fenced, this includes removal of all posts, fencing material, gates etc. to return the site to pre -facility condition . Transportation and Clean up During the disassembly and demolition process materials are segregated and temporarily place in gathering areas for transportation. The various materials including concrete, steel, aluminum, copper and other materials will be temporarily stockpiled at or near a designated processing location pending transport to an appropriate offsite recycling facility. All such materials will be transported from the site to approved designated facilities for recycling, scrapping or disposal . All metals will be recycled to the extent practical given the recycling options available at the time of decommissioning . Clean -up of soils and site, if identified will be completed to ensure that clean closure is accomplished . In general, the decommissioning will be undertaken using traditional heavy construction equipment including but not limited to front end loaders, cranes, track mounted and rubber-tired excavators, bull dozers, and scrapers . Where excavation is required those areas of removal will be backfilled with natural material and compacted . Any . . . Page 4 of , McCormick 2 Solar Garden - Oak Leaf Solar 40 LLC voids left from the removal of foundations will be backfilled with surrounding subsoil and topsoil and fine graded to ensure suitable drainage and reclamation of natural grades. Soil management and re-contouring operations will be conducted so as to minimize the surface area disturbance and implement the activities in the safest and most efficient manner and in accordance withal applicable local requirements. Major earthwork is not anticipated as construction of the site will not alter the general grade across the site. To provide for post-decommissioning dust control on the site, areas of exposed soils will be revegetated, consistent with the expected future use of the site. For example, future site use is expected to be agricultural, a revegetation approach will be implemented that will not conflict with the expect agricultural use . The native dry grass vegetation will be re-esta bushed to prevent the spread of weeds and long-term monito ring will be conducted to confirm reclamation and weed control are successful. Mulching or palliatives may be used for temporary dust control until vegetation is established . Monitoring Site Restoration Upon completion of the decommissioning process a restoration monitoring period of one year will begin . Monitoring will ensure that grading and drainage implemented is successful in stabilizing water flow patterns and that the cover vegetation ( native dry grass vegetation or other depending on land use) will be reestablished to prevent the spread of weeds. Corrective actions will be implemented if such monitoring determines adverse conditions are present as a result of an inadequate restoration . Facility Quality Control and Documentation During the entire decommissioning process, from planning to site monitoring, the facility will be subject to quality control and documentation. Oak Leaf will ensure the effective execution of the decommissioning and reclamation plan through facility oversight and quality assurance. In addition, we will document implementation of the plan and compliance with all applicable regulatory and environmental requirement. Page 5 of I I -, _ , ____ _ ` I ... . .may �I — pak leaf ___ _i.,..,,,_ __ ' 4_ - __ L I Y 1 PARTNERS ^. _ • Y'�..i_ — — - Waste Handling Plan - small scale solar USR McCormick 2 solar Garden - Oak Leaf solar 40 LLC July 9 , 2019 cish 414 S. , itic.,,erf; IN„dital II — s. 7 k Iiii: r v 1 tl p it 0 la I I. " , 6 'I 441t! ma. ' e f n p k k n I _y II ". r , .. k • ' ��. . k. . pu - _r ` •-f, ., J �" do it i IIr _ - X 4 Ilk fi I v k a did d y la I t: i ... ti, *IILs9's 1 dif. i s �� oil 1 X fil�1'Y� X11 II 4 . 3' III p e �Y d • •,� f II N e It I t 11 i I' hi id e 1 M I I p A •� .. q d u - alb • ;r_ " - d1 �In1� _�� b d w a P ii N a e k e �e �� I �i I a e . I 7 Oak Leaf Energy Partners 2645 E . 2nd Avenue , Suite 206 Denver, CO 80206 McCormick 2 Solar Garden - Oak Leaf Solar 40 LLC 1 Waste Handling Plan Oak Leaf Solar 40 LLC (Oak Leaf) has detailed policies and procedures in place that will be applied to the specifics of any waste generated and disposal from the facility . If present, any waste will be disposed of in accordance to the governing jurisdiction . 2 Solid Waste Solid waste will not be generated by the daily operations of the facility. If solid waste is observed or generated , then it will be collected and removed by the personal visiting the site . Disposal of collected solid waste will be removed from the site on each visit and properly disposed . No trash receptacles or trash hauling service will be provided at this facility. 3 Chemicals It is not anticipated that any chemicals , lubricants or solvents will be stored at on the proposed facility , however if chemicals , lubricants or solvents are stored on-site then they will be stored in an enclosed structure where it will be protected from the natural elements and in accordance with the manufactures recommendations . Any stored chemicals , lubricants or solvents will be less than 5 gallons in size . It is anticipated that any chemicals , lubricants or solvents to be used on-site will be brought in by the maintenance personal . If necessary, disposal of chemicals , lubricants and solvents will be completed according to the manufacturer and state requirements . 4 Hazardous Waste No hazardous waste will be generated , stored or used on-site . Page 2 u13 ..... , ..... _ . . __ _ __.„,.,„ _ 0 oak leaf _ _ . .__ .._ _ ENERGY PARTNERS • maintenance and Vegetation Plan Small scale Solar USR McCormick 2 Solar Garden - Oak Leaf Solar 40 LLC 1 July 9r 2019 ch — -._ it T _aig".1 rra _ liss , _a., - 16611/2—ailki<iii _is, I . , 'e r4 tl 6ja. err 1E 0 IllY I _ n I i - . - :r ,I _ - ri NI 1 u 1. !t1 it I�. - I ° �5 yid °X Y. .^. r0. I 4� • .. nt f oil „ I11 r 1Sina' a u e „ E Iu eke_ r lid, li fi a :„ - •v k�! II et 1 � Id - III lI I I.., , ! �0 "' �Xr N II' ,r • - 9 • 1 } . ae=1e-l a e . ," i tlu Il ....10, 10L9 EL i "Alh-kilklirr_ r7-, . . Lk Ihr , nil I art di d d O ll ,I. 1. a it I 11#1. i I li i di I • III I I 1 I i M .. 1 u u ° p II I a I • I N - _ tl 1 III k - I !I �� r n n e Oak Leaf Energy Partners 2645 E . 2nd Avenue / Suite 206 Denver/ CO 80206 McCormick 2 Solar Garden - Oak Leaf Solar 40 LLC 1 Site Maintenance and Vegetation Plan Site maintenance is an important part of a successful project and the following list is a guideline of the necessary steps that will be performed to maintain the site and establish vegetation . 2 Weed Management 2 . 1 Apply broadleaf herbicide for weed control 2-3 times per grow season and before and during construction . Repeat as needed . 2 . 2 Apply an herbicide application for entire project area after construction is completed and then 6 weeks prior to seed planting . Once vegetation is established , apply herbicide as needed to control noxious weeds . 2 . 3 Drill/plant a drought tolerant native grass seed mix in the early spring or early fall . Final seed mix shall be determined by a qualified professional knowledgeable with re- vegetation means and methods . 2 . 4 Mow project area at least once per year, at a cut height of 6 inches or greater. Mowing too short reduces the vigor of the grass , which can be significant to cover production and health in non-irrigated plantings . Since weed seeds remain viable in the soil for numerous years, site and weed management is a long-term process . Treated areas should be monitored annually and re-treated if necessary , using typical weed management practices and procedures . 3 Soil Nutrients Prior to seeding , soils shall be tested for proper nutrients and amended as recommended by re- vegetation specialist. Basic Nutrient Requirements fertilizer ( nutrient required ) lbs . /acre nitrogen 40 diphosphorus dioxide 20 4 Planting Method Grass seed shall be planted with a grass seed drill ( not a grain drill ) at a depth of 1 /2" to 3/4" . broadcast seeding of grass seed is not acceptable . Straw or hay mulch shall be spread and crimped into the soil at the rate of 4,000 Ibs/acre . Pape 2 of 4 McCormick 2 Solar Garden - Oak Leaf Solar 40 LLC Hydroseeding and hydromulching is acceptable in lieu of drilling seed and crimping in straw mulch . Permanent seeding shall occur between December 1 and may 1 or between August 1 and September 1 , or as recommended by the vegetation specialist. 5 Temporary Seed Mix Temporary seeding areas which are ready for seeding after May 1 but before July 1 shall be seeded with millet or sorghum at the rate of 40 pounds per acre with the amount of fertilizer as specified . The requirement to plant temporary seeding does not eliminate the requirement to plant the permanent seeding . Straw mulch is not required for temporary seeding . 6 Permanent Seed Mix To be determined at the time of planting by a qualified vegetation specialist . Final seed mix shall be determined by a qualified professional knowledgeable with re-vegetation means and methods . 7 Site Maintenance Checklist Mow project area at least once per year at a cut height of 6 inches or greater. Walk the site and remove any accumulated debris and properly dispose . No burning of trash will be allowed . Apply herbicide as needed to control noxious weeds . Inspect and re-seed any bare ground with permanent seeding . Inspect fence and repair as needed . Inspect all-weather access road and repair as needed . Inspect site for any visible erosion . Removed transported sediment and construct erosion control measures to minimize future maintenance issues . Page 3 of 4 I _ - . . _ • ,r, ._ _ _ oak leaf ri_ _ __,....,„ _ _ .._ ..... ,..,,._...„, _. , 101. ENERGY PARTNERS Landscape and screening Plan - small scale solar USR McCormick 2 Solar Garde n - Oak Leaf solar 40 LLC July 9 , 2019 4 :I ,Qa E , c . Via. _ale i illitilliSisissis et _ - aispOleill S. li ft ' I mfil litiz r o r ' I il _ 101i II R II ti-11/2_,,,ilit,::::,,s, "sta I I. Sir ; ' I el In r p It "err6 iii. { a li It. u I !t1 I. i p p n 4..._ I� • - „e a r ^ .. IIleili ill �'� I�. Ipd IT- I'a d 10", fit' -■_ d -•y. �. � , . III I� _ rr. k_ ppk r a..p do I I et G i� I _ LI ill I niiaaler 1% 9 I a - :8 A, �� . EL IL di ll 9II( rili le 411—ii .9 l' p p I �Y d , Iii 1 1 11 X 44- I� . O , ll r. r it I d t 11 ill III I 4 i 4 , t 1 '. alb . ;� et 1�l i4 0 ? I • il ii I N - _ a itI . - 1 I. 7 Oak Leaf Energy Partners 2645 E . 2nd Avenue / Suite 206 Denver/ CO 80206 McCormick 2 Solar Garden - Oak Leaf Solar 40 LIC 1 Landscape and Screening Plan This development is being constructed in a rural part of Weld County near Platteville Colorado . The site is located on the north side of CR 36 west of CR 25 . The surrounding land is agriculture land with associated single family farm houses . To help continue the beautiful feel and aesthetics of Colorado this development will include elements of landscaping and buffering from the adjacent right-of-ways . 1 . 1 Landscaping This development will be constructed approximately 350 feet north of CR 6 on a leased piece of land of approximately 13 . 3 acres is size . The entire site will be revegetated with a decorative " low growth " native seed mix The native grasses will provide aesthetic appeal and provide a natural look that will connect the land to the surrounding natural areas. Landscape shall remain healthy and maintained to continue to provide vegetative ground cover. 1 . 2 Fencing For security and protection of the public and wildlife , the solar garden will be fenced with a wildlife friendly decorative fence . The selected fence will blend with the natural environment and will prevent wildlife from entering the site causing damage and therefore providing security of the improvements . Fencing shall be maintained as needed to provide the intended security of the proposed improvements . 1 . 3 Buffering The proposed site has been situated approximately 350 feet north of CR 36 . Between the north side of the county road and the south side of the solar garden there exists approximately 46 trees ranging in maturity from what appears to be young trees to large mature trees . The height of the trees varies and per google street view, the trees will completely screen the proposed solar garden from public view. Buffering will continue to be provided by the existing trees. It appears that there is a variety of trees and all at varying maturity levels . The existing trees will continue to provide screening for anticipated future . Page 2 u13 lea ENERGY PARTNERS Traffic Generation Analysis & Study Oak Leaf Solar 40 LLC July 9, 2019 To : Weld County Engineering Department To Whom it May Concern, The Project is a 1 . 5 MW-AC solar array located along Weld County Rd. 36. Due to the Project's small size and the nature of its design, it is intended to be a low-maintenance facility with minimal operational needs, with the result being a minimal increase in area traffic. The County threshold triggering a more in-depth traffic impact study is an average of 20 cars per day. Once operational, we estimate the average additional traffic to the Project will be significantly less than this, on the order of 5 - 10 cars annually. This is based on the design of the Project to operate without significant regular maintenance - which is common for small solar projects - and barring any unforeseen circumstances. Therefore, we recommend that the project move forward with the understanding that no additional traffic impact studies will be required, and that no additional traffic information will be needed . Please contact me if you have any questions regarding this Project. Sincerely, /s/ Michael McCabe Michael McCabe Partner - Oak Leaf Energy Partners 303 -893 -6945 - Office Tike@oakleafep.com Oak Leaf Energ Partners 2645 E . 2nd Avenue, Suite 206 Denver, CO 80206 t- oak leaf ., ENERGY PARTNERS Traffic Generation Analysis Oak Leaf Solar 40 LLC Date. May 15, 2019 To: Weld County Engineering Department To Whom it May Concern, The Project is a 1., 5 -AC solar array located along Weld County Rd, 36 . Due to the Project's small size and the nature of its design, it is intended to be a low-maintenance facility with minimal operational needs, with the result being a minimal increase in area traffic. The County threshold triggering a more in-depth traffic impact study is an average of 20 cars per day. Once operational, we estimate the average additional traffic to the Project will be significantly less than this, on the order of 5- 10 cars annually. This is based on the design of the Project to operate without significant regular maintenance - which is common for small solar projects - and barring any unforeseen circumstances. Therefore, we recommend that the project move forward with the understanding that no additional traffic impact studies wilt be required, and that no additional traffic information will be needed. Please contact me if you have any questions regarding this Project. Sincerely, 2wr- dY i chael McCabe Partner - Oak Leaf Energy Partners 303-893 -6945 - Office mikeffioakleatep,corn Oak Leaf Energy Partners 2645 E. 2nd Avenue, Suite 206 Denver, CO 80206 Westwood Drainage Report for the McCorrnck II Solar Project County of Weld , Colorado Prepared for: Prepared by: Westwood Professional Services 12707 Whitewater Drive, Suite 300 oak leaf Minnetonka, MN 55343 ENERGY VAni 1VEk5 Project Number: 0022055 . 00 Date : 06/24!2019 CONTENTS PROJECTSITE .. . . * ** * .. . . . . ... . . . ... . . . ... . . . .** * . . $*$ * . * *** . * . $*$ * . * *.. . . .*$ EERL DESRIPTII`�TF PIJET . . . . . . .* . . . . .** . . . ... . . . ... . . . . . . . . . .. . . . ... . . . ... . . . ... . . DRAINAGE E SIGN a a •• • • • • •• • • • • IDS • • • • • • • • • • • • • • te • • • • IMOIM • • • • DETENTION POND EXEMPTION PTION REQUEST . ... . . . ..• • • • ••• • • • •OOOOOOOOOOO OOOOOOO 40000 •• • • • • ••• • • • ••• • • • • •• • • • • • • • • $•$ AIjAENT AREAS . . . .. . . . ... . . . ... . . . . . . . . .*. . . . .`U . . . . .. . . . 3 ONS ITE SOILS . . . . . . . . .. . . . ... . . . 1" IETH+ D L IES SSE FAR D AII" TA E SP I T AN L I3 TIMING/PHASING TIMING/PHASING SCHEDULE . . 3 BMP Installation, Inspection and Removal . .. . . . . . . . . . . . . . . .. . . . . .. . . . •*. . . . .. . PER Al` TEl` TT STAI ILI ATI 1` T . * . . . . $ . . . . . *** . . . * .* . . . . .• * MS . . . * * . *.. . . . ** . . . . **3 sToRm wATER 1" 'IANA EmE1' T . . . . a O . . . . ... . . . .. . . . . ... . . . . t 4 ATTACHMENTS Attachment 1 : McCormick II Solar Project Site Plan Attachment 2: NOAA Atlas 14 Rainfall Data Attachment 3 : Hydro AD Report Attachment 4: USDA Web Soil Survey Map Drainage Report 1 McCormick II Solar Project PROJECT SITE This Drainage Report has been prepared on behalf of Oak Leaf Energy Partners for the proposed construction of the McCormick II Solar Project in Weld County, Colorado hereinafter referred to as the project. The proposed development is located in the SW 1 /2/2 Quarter of Section 1 , Township 3 North, Range 67 West of the 6th Prime Meridian. More specifically the project site is approximately 10.0 acres of land and is located approximately 2 . 5 miles northwest of Platteville and approximately 1 . 25 miles west of the intersection of Weld County Road (WCR 36 and U . S . Hwy 5 , State of Colorado . The site is covered with agricultural row crops. The ground surface slopes to the north at an average slope of approximately 0 .2% . The site is within a FEMA Zone X, which is an area of minimal flood hazard. The site is therefore not within a 100 -year flood plain. GENERAL DESCRIPTION E PROJECT It is proposed to develop approximately 10 . 0 acres of land for the project of an approximate 2MW solar array. The solar array will deliver renewable energy to Xcel Energy under a 20-year power purchase agreement (PPA). The facility is designed for un-manned operation except for bi-annual maintenance. Therefore, this facility will not represent any significant traffic impact to the surrounding county roads . Upon termination of the PPA, the improvements will be removed and the land will be restored to historic conditions. DRAINAGE DESIGN The area under and around the solar panels will be planted with low-maintenance grass seed mix. Very little additional impervious surface will be added to the site . The only new impervious surface is the gravel access road and concrete inverter pads, which are approximately 8 ,725 square feet and 300 square feet, respectively. Given this, a waiver is requested for the detention pond requirement and allow runoff to sheet flow to the west as it does in existing conditions. Historically stormwater runs north and then west to the adjacent parcels where it continues into the stream to the west. When the site is fully vegetated after construction, stormwater will flow off the solar panels, onto the ground, and run through the grass. The onsite soils, which are all categorized as hydrologic soil group C (Attachment 4), are conducive to infiltration . The fully vegetated site will slow runoff and encourage infiltration. DETENTION POND EXEMPTION REQUEST A waiver is requested under Weld County Code Section 23 - 12- 0 . F . l . a . 10 ; it states that, "Non- urbanizing areas where the total project stormwater runoff of less than, or equal to, 10 cfs in a 1 - hour, 100-year storm event." As shown in the HydroCA model, the proposed discharge rate in such an event is 3 . 10 cfs , due to infiltration rates and a fully vegetated site, (Attachment 3 ). If the waiver is approved, there would be no County requirement for detention pond or water quality pond on site. If the waiver is not approved, the site will require a pond large enough to Drainage Report 2 McCormick II Solar Project detain the volume of runoff from a 1 -hour, 100-year storm (approximately 23 ,700 cubic feet) and limit the discharge to the existing 1 -hour, 10-year. See Weld County Code Section 23 - 12-30. D . ADJACENT AREAS A stream is located a few parcels west of the project area. Minor runoff from the adjacent parcels sheet flows onto the project site and continues west. ONSITE SOILS The soils for this project site are classified as hydrologic soil group A . The soil types found in the project site area are Dacono clay loam, 0 to 1 percent slopes, Dacono clay loam, 1 to 3 percent slopes and Nunn loam, 0 to 1 percent slopes . This soil information is based on the Natural Resources Conservation Service (NRCS) National Cooperative Soil Survey. The curve number in the HydroCAD model is lower in proposed conditions than in existing conditions . The proposed vegetated conditions will slow run off and encourage infiltration. METHODOLOGIES USED FOR DRAINAGE REPORT & ANALYSIS The site qualifies for an exemption to the stormwater detention requirement based on the Weld County ordinance . This exempts the site from ponding requirements . Existing and proposed discharge rates were calculated using HydroCAD modeling software, which used the SCS curve number method. Rainfall data was obtained from NOAA Atlas 14 and utilized a site-specific nested rainfall distribution (Attachment 2) . TIMING/PHASING SCHEDULE In the initial and interim stages, the contractor shall install silt fence, vehicle traction control and concrete washout at the entrance, and a stabilized staging area. In the final stage of construction, seeding and mulching and surface roughing shall be done in all disturbed areas, and erosion control blankets shall be installed on all slopes greater than 4: 1 . The contractor shall also remove the vehicle traction control, concrete washout, stabilized staging area, erosion control blanket, and silt fence in the final stage of construction. BMP Installation, Inspection, and Removal BMPs will be installed prior to project construction, with the exception of the BMPs in the final stage . BMPs will be inspected weekly and as required by the County through project completion by the contractor. BMPs will be maintained and remain in place at least until construction is finished and the site is vegetated. Once all exposed areas have been covered, the BMPs may be removed. Since the project does not include any other disturbance, no additional site stabilization is necessary and/or warranted. PERMANENT STABILIZATION The project site will be seeded with the Weld County ' s upland area seed mix to establish permanent stabilization after construction activity has ceased. Reference the table on sheet 13 -66 of Appendix A in the USDCM Manual, Volume 2, Chapter 13 . ' As per the USDCM Manual, permanent seeding involves the loosening of soil, applying topsoil, drill seeding the disturbed ' http ://udfcd .org/wp-content/uploads/uploads/volt%2Ocriteria%a2Omanual/ 13_Reve,getation.pdf Drainage Report 3 McCormick 11 Solar Project areas to a depth not less than '/4 inch and not more than 3 inch, and crimping the seeded areas in straw mulch at a rate of 2 tons per acre to provide immediate erosion protection. STORM WATER MANAGEMENT The proposed site will be designed to maintain its existing drainage patterns . Due to the limited amount of impervious surface proposed and the proposed conversion of the site from row crops to the vegetated cover under the panels, a decrease in runoff rates is expected for the proposed conditions when compared to existing conditions . Water quality will be provided by the disconnected impervious and the proposed vegetation below the panels . Since there will only be a slight increase in impervious areas, a detention pond is not required. Drainage Report 4 McCormick 11 Solar Project Attachment 1 McCormick II Solar Project Site Plan I 1 2 3 4 r 6 7 a 9 4:t. NViWp.st:.onclFrcfPsconalSP .ines, Inn USE BY SPECIAL REVIEW USRXX-XXXX {cell 45 ou•s F181 1 cig irly: e. t� 817 or tai1817.cam od Cc•1 non Grc_nd All-arce 1 , MW—AC (2 MW—DC) SOLAR ARRAY PROJECT -Pere .•rtq.JltiJs. -11:J�lid•o nitrite.,"e"I-Aril cd:.SI.I E2+1•_I' A PORTION OF THE SW1/4 OF SECTION 1, TOWNSHIP 3 NORTH, RANGE 67 WEST OF THE 6TH PIA, "•� "•"•Il "' COUNTY OF WELDr STATE OF COLORADO A MCCORMICK 2 SOLAR ' .0I T,,,. ,-. - N 1 ES .- - . I+ ♦ . . 1. 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I I I 1 • • • 1 I' .,...I i. :` 4 I I ' , I • ,.1 II , 40 I I 1 •• , A , • .. , . , : ,, -••_.•yam- J-:"4-7;---- N I I I I 1 , n .y • • .� , . 1 — I 1 tt • \ - _1 • I I . ' i I i {}5I4� Solar ' _ I) F _ � 'I I Weld County, Colorado 1 ` � r. Tt1 I LUIR_LIL3 IC!'1_SI II',"+ 1 II F —� — _ , :i Drainage } T .. .. _ _ n I a ee . 7 li • t. I f PRELIMINARY • G ` 1 , �� -i lit wi ' .'ZZ'� i I'_'W_'•Y�_L"Llf.iai_'I.L:_J 1J L'I11.lI:IIf:L.!•Ih:_IJL': ' L'i%t•ILJw II LS_a NOT FOR CONSTRUCTION DA-E: 07/02/2019 I 1 EH .O 1 n WELD COUNTY CASE NUMBER: USRXX-XXXX ([EPARTM:NT or PLANNING SERVlC=5) Attachment 2 NOAA Atlas 14 Rainfall Data _ NOAA Atlas 14, Volume 8, Version 2 `wit� \\ Location name : Platteville , Colorado, USA* ki-a" Latitude : 40.2486° Longitude : -104.8401° t1uAA = i� -` Elevation: 4783.73 ft** ? t T * source: EsRI Maps _ 4r� .; ** source: USGS POINT PRECIPITATION FREQUENCY ESTIMATES Sanja Perica, Deborah Martin , Sandra Pavlovic, Ishani Roy, Michael St. Laurent, Carl Trypalulc Dale Unruh , Michael Yekta, Geoffery Bonn ' n NOAA, National WeatherService, Silver Spring , Maryland PF tabular I PF graphical I Maps & aerials PF tabular PDS-based point precipitation frequency estimates with 90% confidence intervals (in inches)1 Average recurrence interval (years) Duration 1 2 5 10 f 25 I 50 100 200 500 1000 0.236 0.286 0.383 0.479 0.635 0772 0.926 1 .10 1 .35 1 .56 5-min (0. 186-0.301 ) (0.225-0.365) (0.300-0.491 ) (0.373-0.617) (0.487-0.879) (0.574- 1 .08) (0.662- 1 .32) (0.751 - 1 .61 ) (0.885-2.04) (0.987-2.36) 10-min 0.346 0.418 0.561 0.702 0.929 1 .13 1 .36 1 .61 1 .98 2 .28 (0.272-0.441 ) (0.329-0.535) (0.439-0.719) (0.546-0.904) (0.714- 1 .29) (0.840- 1 .58) (0.970- 1 .94) (1 .10-2.36) (1 .30-2.98) (1 .45-3.46) 15 n 0.422 0 .510 0.684 0.856 1 .13 1 .38 1 .65 1 .96 2.41 2.78 (0.332-0.538) (0.401 -0.652) (0.536-0.877) (0.666-1 .10) (0.870- 1 .57) (1 .02-1 .92) (1 .18-2.36) (1 .34-2.88) (1 .58-3.64) (1 .76-4.21 ) , 30-m i n 0.566 0.683 0.913 1 .14 1 .51 1 .84 2 .21 2.63 3.23 3.74 (0.446-0.723) (0.536-0.872) (0.715- 1 . 17) (0.888-1 .47) (1 .16-2.10) (1 .37-2.57) (1 .58-3.16) (1 .80-3.86) (2.12-4.88) (2.37-5.66) 0.699 0.833 1 .11 1 .39 1 .85 2.26 213 3.26 4.05 4.70 6O-min (0.550-0.892) (0.654- 1 .06) (0.867- 1 .42) (1 .08- 1 .79) (1 .42-2.57) ( 1 .69-3. 17) 1 (1 .96-3.92) (2.24-4.81 ) (2.66-6. 12) (2.98-7. 12) 2-hr 0.831 0 .983 1 .30 1 .63 2.18 2.69 3.25 3.90 4.86 5.67 (0.660- 1 .05) (0.779- 1 .24) (1 .03- 1 .65) (1 .28-2.08) (1 .70-3.01 ) (2.02-3.72) (2.36-4.62) (2.70-5.68) (3.23-7.27) (3.63-8.47) 3-hr 0.908 1 .07 1 .40 1 .75 2.35 2.903.52 4.23 5.28 6.17 (0.725- 1 .14) (0.849- 1 .34) ( 1 . 11 - 1 .77) ( 1 .39-2.22) ( 1 .85-3.23) (2.19-3.99) (2.57-4.96) (2.95-6.12) (3.53-7.84) (3.97-9. 15) 6-hr 1 .07 1 .25 1 .62 2.00 2.66 3.26 3.94 4.71 5.86 6 .83 (0.863- 1 .33) (1 .00-1 .55) ( 1 .30-2.01 ) ( 1 .60-2.51 ) (2.11 -3.60) (2.49-4.43) (2.90-5.48) (3.32-6.72) (3.96-8.58) (4.44-9. 99) 12-hr 1 .27 1 .50 1 .94 2.37 3.06 3.66 4 .33 5.07 6.16 7 .06 (1 .03-1 .55) (1 .22-1 .84) ( 1 .57-2.39) ( 1 .91 -2.93) (2.42-4.03) (2.81 -4.87) (3.21 -5.90) (3.60-7.11 ) (4.19-8.86) (4.64- 10.2) 24-hr 1 .51 1 .78 2.29 2.76 348 4.10 4.77 5.51 6.57 7 .44 (1 .24-1 .83) (1 .46-2.17) (1 .87-2.79) (2.24-3.38) (217-4.50) (3.17-5.36) (3.56-6.39) (3.94-7.58) (4.51 -9.29) (4.94- 10.6) 2-day 1 .7'3 2.07 2 .67 3.19 3.96 4.60 1 5 .27 5.98 6.98 717 ( 1 .44-2.08) (1 .72-2.49) (2.20-3.21 ) (2.62-3.86) (3. 16-5.01 ) (3.58-5.89) (3.96-6.92) (4.31 -8.07) (4.83-9.68) (5.M- 10.9) 3-day 1 .89 2.24 2.84 3.37 4.15 4.80 5.4 .7 6.19 7.20 8.00 (1 .58-2.26) (1 .87-2.67) (2.36-3.40) (2.78-4.05) (3.33-5.21 ) (3.75-6.09) (4. 13-7. 13) (4.49-8.29) ( 5.01-9.90) (5.41 -11 . 1 ) 2.02 2.37 2.98 3.51 4.30 4.94 5.63 6.35 7.37 8.17 4-d ( 1 .69-2 .40) ( 1 .98-2.81 ) (2.48-3.54) (2.91 -4.20) (3.47-5.37) (3. 89-6.25) [(4.27-7.29) (4.62-8.45) ( 5. 15- 10. 1 ) (5.55- 11 .3) 7-day 2.31 2."70 3.36 3.93 4.75 5.41 6 .09 6.81 7.79 8.56 ( 1 .95-2 .71 ) (2.27-3.17) (2.82-3.96) (3.28-4.66) (3.85-5.84) (4.28-6.74) (4.65-7.78) (4.99-8.93) (5.49- 10.5) (5.87-11 .7) 2.55 2.98 3.69 4.30 5.15 5.82 6 .50 7.21 8.'16 8 .90 10-day 2 53-3.49) (3. 12-4.33(2. 17-2 .98) ( ) (3.61 -5.06) (4. 18-6.27) (4.62-7. 18) [(4.99-8.22) (5.30-9.37) i ( 5.78- 10.9) (6. 14- 12 . 1 ) 1 20-day 326 3.76 4 .58 5.25 6.18 6.89 7.60 8.32 9.27 9 .99 (2.79-3.76) (3.22-4.35) (3.90-5.30) (4.45-6. 11 ) (5.06-7.40) (5. 52-8.37) (5.89-9.46) (6. 19- 10.6) (6.63- 12.2) (6.97- 13.4) 30 3.82 4.38 5.30 6.04 7.06 7.83 8.58 9.34 10.3 11 .1 -day (3.29-4.38) (3.77-5.03) (4.55-6.10) (5. 16-6.99) (5.81 -8.37) (6.30-9.42) (6.68- 10.6) (6.98- 11 .8) (7.43- 13.4) (7.76- 14.6) 4.49 5.16 6.23 7.09 8.24 9.10 9 .93 10.8 11 .8 12.6 45-day (3.89-5.11 ) (4.47-5.88) (5.37-7. 11 ) (6.08-8. 13) (6.81 -9.68) (7.37- 10.8) (7.78- 12.1 ) (8.08- 13.5) ( 8. 54- 15. 2 15. 2) (8.89- 16.5) 60y 5.03 5.81 7 .03 8.01 9.30 10.3 11 .2 12.1 13.2 14.0 -da (4.38-5.71 ) (5.05-6.59) (6. 10-8.00) (6.91 -9. 15) (7.72- 10.9) (8.33- 12.1 ) [j8.78- 13.5) (9. 10- 15.0) (9.57- 16.8) (9.93- 18.2) 1 Precipitation frequency (PF) estimates in this table are based on frequency analysis of partial duration series ( P06). Numbers in parenthesis are PF estimates at lower and upper bounds of the 90% confidence interval. The probability that precipitation frequency estimates (for a given duration and average recurrence interval) w ill be greater than the upper bound (or less than the lower bound) is 5%. Estimates at upper bounds are not checked against probable maximum precipitation (PMP) estimates and may be higher than currently valid PMP values. Please refer to NOAA Atlas 14 document for more information. Back to Top PF graphical PDS- based depth-duration-frequency ( DD F ) curves Latitude : 40 ..24861 Longitude: - 104 .8401 ' 1 . i I I I i i i I I I I I i r- I I i 1 1 1 1 i 1 1 i i 1 . i 1 1 1 i rage recurrent e e 1 e I 1 e I I r I I i • . e . JI (ye ars ] . i 1 a 1 1 I I 1 i 1 1 I --� c • •a 1 t a : ! . . I ail 8 '. e e e .. r .. .. .. .. .. _• . , • - - .��] C. is a -- . — 10 a — a G0 : I . 1 1 1 I 1 j i' I I I-V 4—i _a . 25 L. 4_1 rte_' . .t..—_ Yl'� 1.�''1�I 1....- . ,_. 1. — i —a 1 : . r . -,.^ -� • r'.1 • I . _ I. _ .r--•• ..1 . .. .:1 I . i 1 11 L..r • — 2D0 . `,• 1 i �-- a ter. e _ .�e•y■ —{ r • 0 1 ...Peer's' • - r : ... i r - • - -_ - - __ . •• moats _ . . �1 x!00 1 aearareaarierirrr 1 • ea 1 I 1 1 1 I I 1•i / 1 1 I a I � ��I' I I i I I I I I I I I I I I I I C Ii^..s C C € L . Ly� LILT ` ` '-I .. I '----, X11? I "-r I t---, :tT*si > >-. 1. a7rz- I t Li 11 in i 0 lug el3 r13 a a N i t tt ti cr N- 0 0 0 s&i O R-I ItI rnI 1,O rH iN fl cr Duration 14 I I I I I I I I : : i : • . I e • . 1 1 1 I 1 • Duration : : — .. - - - - -CU 1 - . - - - - - - - . . _ . _ . 1 . . _ . _ _ . _ . _ . . _ _ • �'Ft�P1 -O i 1 1 I I e 1 e _ 10-min 3 -d ay G . e e - - 15—min — 4-d ay cam I I V f I e . e i : 3,41 I _ - 1 241r - — 1 : _- I _________I__ __ `T- 1 0 I I I I I I I i '4.--Ihr 1 2 5 10 25 50 100 200 5 00 10D0 Q Average recurrence interval (years ) NOAH Atlas 14 Volume B . Version 2 Created ( GIST) : Mon Jun 17 19: 32 : 31 2019 Back to Top Maps & aerials Small scale terrain atl1. ' I'Le U I 0 ICI Glicrest 43 ::• 1: N. J ■ f A + 4 _i I 185 !, Y I r' f _�1 I 1 M i 3km PI attevIIIe N 4 2mi -, r Large scale terrain \re ,iir dr ;yr CI ! I in ra tar, l. f r 7 -:� 'Fo r tcoii ns 0 • a Greeley raker-9.---- - Longs Pe.ik I - . 43 45 ITS Y ■ el _` lawn!' I.� iii� l7 - -# {.>: -- -: BcuIdel- i' y u r isT f a. •• . Danver . it mr .:: -r iv 100km _ it I .t 60m 1 - " , r/ _ Large sca l e m a p 7 Fort a. :oilin Greeley 7� a ° i1�'rtit Ei 'ail(' _ io Mliii Ilig 100km h( Irl A GOm i Large scale aerial j� ' _tTrt .H { • � .. • .1 1` :rt tiI w r' • i.4.. "r.e �,. r . tin 4ti L i y • D ` it 1 •1 100km a _ • 1 60m i ' , I s relish e Colora.uo Back to Top US Department of Corn merce National Oceanic and Atmospheric Adm in is tration National Weather Service National Water C e n to r 1325 East West Highway Silver Spring, MD 20 910 Questions ? : HDSC.Questions@noaa.gov Disclaimer Attachment Hyd o o j { ts ts • tj l;, Existing Conditions 1 s Existing Onsite Drainage Area Subca Reach Pon . Link Routing Diagram for 2019-06-17_McCormickll-PrePost Prepared by Westwood, Printed 6/17/2019 HydroCADO 10.00-19 sln 10449 © 2016 HydroCAD Software Solutions LLC 2019-06-'I 7_McCo rmi ckI I-ID re Post Prepared by Westwood Printed 6/ 17/2019 HydroCAD® 10.00-19 sin 10449 © 2016 HydroCAD Software Solutions LLC Page 2 Area Listing (selected nodes) Area CN Description (acres) (subcatchment-numbers) 10.000 85 Row crops, straight row, Good , HSG C ( 1S) 10.000 85 TOTAL AREA 2019-06-'I 7_McCo rmi ckl l-ID re Post Prepared by Westwood Printed 6/ 1712019 HydroCAD® 10.00-19 sin 10449 © 2016 HydroCAD Software Solutions LLC Page 3 Soil Listing (selected nodes) Area Soil Subcatchment (acres) Group Numbers 0.000 HSG A► 0.000 HSG B 10.000 HSG C 1S 0.000 HSG D 0.000 Other 10.000 TOTAL AREA 2019-06-'I 7_McCo rmi ckI I-ID re Post Prepared by Westwood Printed 6117/2019 HydroCAD® 10.00-19 sin 10449 © 2016 HydroCAD Software Solutions LLC Page 4 Ground Covers (selected nodes) HSG-A► HSG-B HSG-C HSG-D Other Total Ground Subcatchment (acres) (acres) (acres) (acres) (acres) (acres) Cover Numbers 0.000 0 .000 10. 000 0.000 0 .000 10.000 Row crops, straight row, Good 1S 0.000 0.000 10. 000 0.000 0.000 10.000 TOTAL AREA 2019-06-'I7_McCormickll-PrePost McCormickil 24-hr Si 10-err 1 . 00 hrs 10-yr 1-hr Rat faII= 1. 39 " Prepared by Westwood Printed 6/ 1712019 HydroCAD® 10.00-19 sin 10449 © 2016 HydroCAD Software Solutions LLC Page 5 Time span= 0. 00-48. 00 hrs, dt= 0. 05 hrs, 961 points Runoff by SCS TR-20 method , UH =SCS, Weighted-CN Reach routing by Stor- Ind+Trans method - Pond routing by Stor- Ind method Subcatchment aIS: Existing Onsite Drainage Runoff Area= 10 .000 ac 0 .00% Impervious Runoff Depth=0 .38" Flow Length=1 ,400' Slope=0.0014 'P Tc=94.2 min CN=85 Runoff=2.69 cfs 0.320 af Total Runoff Area = 10.000 ac Runoff Volume = 0.320 af Average Runoff Depth = 0.38" 100.00% Pervious = 10.000 ac 0.00% Impervious = 0.000 ac 2019-06-'I7_McCormickll-PrePost McCormick/I 24-hr S110-err 1 . 00 hrs 10-yr 1-hr R'arr fa/1= 1. 39 " Prepared by Westwood Printed 6/ 1712019 HydroCAD® 10.00-19 sin 10449 © 2016 HydroCAD Software Solutions LLC Page 6 Summary for Subcatchment 1S :S : Existing Onsite Drainage Area Runoff = 2 . 69 cfs @ 1 .77 hrs, Volume= 0.320 af, Depth= 0. 38" Runoff by SCS TR-20 method , UH =SCS, Weighted-CN , Time Span= 0.00-48.00 hrs , dt= 0. 05 hrs McCormickll 24-hr S1 10-yr 1 . 00 hrs 10-yr 1 -hr Rainfall = 1 . 39" Area (ac) CN Description 10. 000 85 Row crops , straight row , Good , HSG C 10. 000 100. 00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ftlft) (ft/sec) (cfs) 94.2 1 ,400 0. 0014 0.25 Lag/CN Method, Subcatchment PI S : Existing Onsite Drainage Area Hydrograph - - i r 1 I I fi 1 I r -t I 1- -I I r rt I I 1- 1 I I I I I I I I I I I I I I I I I I I I i I I I I I I I I I I I I I I I I I [[ Runoff 2 .69 cfs 1 III I I I I I I I I I I I Ili ' P I I II II II I McCormicKII 24-hr S1 10-yr 1 .q0 hers I I10-yr '1 -hr Rainfall= 1 .39" Runoff Area= 10 .000 ac I I I I I I I /I I I a- 4 I I -I- -I I 1_ -I I -'Runoff Volume-0 .320 'al Runoff Depth =b .36" ' 'car III ' I ' ' Flow Length-1,400' till I I ii II Slop e=0 .0914', '/' ' III I I I I I Tc=94.2 min ; //, 1 III I I I I I I I I I I I CN =85 I I I I I I I 1 I I I I I 1 1 I I 1 1 1 ' I+ 1 1 1 1 I I 1 1 I I I I I 1 1 I I 1 1 1 1 — ,, I I 1 1 1 1 I I 1 1 I I I I I 1 1 I I 1 1 1 1 I 1 1 1 1 I I 1 1 I I I I I 1 1 I I 1 1 1 / 1 1 1 1 I I 1 1 I I I I I 1 1 I I 1 1 1 1 1 1 I I I 1 1 I I I I I 1 1 I I 1 1 1 1 I 1 1 1 I I I 1 1 I I I I I 1 1 I I 1 1 1 I I 1 1 1 1 I 1 1 I I I I 1 1 I I 1 1 1 - 1 1 1 1 1 1 I I I 1 I I 1 1 I 1 I I I I 1 1 0 'alit: : Ili j i—04 /. /// /141/(4/ 47-4/(17:// el-4/ e I /t/f21 (<47r 1/i/t/e/ ///1W/4 : e/ 0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 Time (hours) 2019-06-'I 7_McCo rmi ckl I-Pre Post McCormick 24-hr SI10-yr 10-yr 24hr Rainfall=2. 76" Prepared by Westwood Printed 6/ 1712019 HydroCAD® 10.00-19 sin 10449 © 2016 HydroCAD Software Solutions LLC Page 7 Time span= 0. 00-48. 00 hrs, dt= 0. 05 hrs, 961 points Runoff by SCS TR-20 method , UH =SCS, Weighted-CN Reach routing by Stor- Ind+Trans method - Pond routing by Stor- Ind method Subcatchment aIS: Existing Onsite Drainage Runoff Area= 10 .000 ac 0 .00% Impervious Runoff Depth=1 .39" Flow Length=1 ,400' Slope=0.0014 'P Tc=94.2 min CN=85 Runoff=5.68 cfs 1 . 157 af Total Runoff Area = 10.000 ac Runoff Volume = 1 . 157 af Average Runoff Depth = 1 .39" 100.00% Pervious = 10.000 ac 0.00% Impervious = 0.000 ac 2019-06-'I 7_McCo rmi ckl I-P re Post Mc ormick/I 24-hr SI10-yr 10-yr 24hr Rainfall=2. 76" Prepared by Westwood Printed 6/ 1712019 HydroCAD® 10.00-19 sin 10449 © 2016 HydroCAD Software Solutions LLC Page 8 Summary for Subcatchment 1 S : Existing Onsite Drainage Area Runoff = 5. 68 cfs @ 13.28 hrs, Volume= 1 . 157 af, Depth= 1 . 39" Runoff by SCS TR-20 method , UH =SCS, Weighted-CN , Time Span= 0.00-48.00 hrs , dt= 0. 05 hrs McCorm ickl 124-hr S1 10-yr 10-yr 24hr Rainfall=2 .76" Area (ac) CN Description 10. 000 85 Row crops , straight row , Good , HSG C 10. 000 100. 00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ftlft) (ft/sec) (cfs) 94.2 1 ,400 0. 0014 0.25 Lag/CN Method, Subcatchment P1 S : Existing Onsite Drainage Area Hydrograph I I I I I I I I I I I I I I I I I I I I I I ! I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I IIII I I I I I [ I1 Runoff 6-- ' I I I I I 5.68 cfs I I I I I I I I I I I I I I I I I I I I I I I I I I I I I IMccdrnhickll24,hrSliO .jr I_ I I I I I I I I I I I I IIIIIIIII I I I I I I I I I 10-yr 4p r Rainfall =2I, 76, "J- I I rI II II I I I I I I I I I I I I I I RunoffArea= 10 . 000ác 1-- - - J - - I- - L - J - I- - - J - - I - - 1- - - -I - - I Rukri - 1 - -I - - , IIII I I I I II ue- � . � 5c7 1 - I I I I I I I I I I I I I I I I I I _ t .7 I I I I I I f I I I I I I I ‘im - I I I I I I I I I I I I I I Ruhoff Depth = 1 . 39 " "-' I- - -I- - -I - - I- - I- - 4 - - !- -1 I I- 4 I I -I- -I I I- a- -4 o3 I I I I I I Z.- I I I I I I I I FIowL.ength =1 , 400' I I I I I fI I I I I I I I I ��" _ I I I I I I I I I I I I I I I I I _0 . 0014 �I J*I I I I rft, I I I I I I I I I I _ , r- - t I I t -t 1/ Ø _ t -I I 1- - I I- t I I2- , 1 IIIIII I I I I I I I I I tc94 . 2min I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I CN =85 I I I I I I I I I I I I I I I I - , 1- - t - -I - - 1- - -I- - 1 - 1 - 1 I I- 1 I I t -1 I I- t I I t -1 1 - ' I I I I I I Hem I I I I I I II I I I I I I I I I I �' I ! I I I I I I I 1 I I I I I I I I ii I I I I IIIIII I IIII j` 1 I I 1i iti ,? / / <17///1<//4/ ./ :� � re/4'f// f jr �/✓� /, ', / //27n ,/_1/i/ t / t i/: d< /; `,f S � .(7 i i � I i Iii � � I I i1i71f fi 1i�iji cliff jl 1 �f� 1 0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 Time (hours) 2019-06-'I 7_McCo rmi ckl I-P re Po Mc ormickII 24-hr S1 100-yr 1. 00 hrs 100-yr 1-hr Rainfall=2. 73 " 73 " Prepared by Westwood Printed 611712019 HydroCAD® 10.00-19 sin 10449 © 2016 HydroCAD Software Solutions LLC Page 9 Time span= 0. 00-48. 00 hrs, dt= 0. 05 hrs, 961 points Runoff by SCS TR-20 method , UH =SCS, Weighted-CN Reach routing by Stor- Ind+Trans method - Pond routing by Stor- Ind method Subcatchment aIS: Existing Onsite Drainage Runoff Area= 10 .000 ac 0 .00% Impervious Runoff Depth=1 .36" Flow Length=1 ,400' Slope=0.0014 'P Tc=94.2 min CN=85 Runoff=9.64 cfs 1 . 137 af Total Runoff Area = 10.000 ac Runoff Volume = 1 . 137 af Average Runoff Depth = 1 .36" 100.00% Pervious = 10.000 ac 0.00% Impervious = 0.000 ac 2019-06-'I 7_McCo rmi ckl I-P re fro Mc ormickII 24-hr S1 100-yr 1. 00 hrs 100-yr 1-hr Rainfall=2. 73 " Prepared by Westwood Printed 611712019 HydroCAD® 10.00-19 sin 10449 © 2016 HydroCAD Software Solutions LLC Page 10 Summary for Subcatchment 1 S : Existing Onsite Drainage Area Runoff = 9. 64 cfs @ 1 .74 hrs, Volume= 1 . 137 af, Depth= 1 . 36" Runoff by SCS TR-20 method , UH =SCS, Weighted-CN , Time Span= 0.00-48.00 hrs , dt= 0. 05 hrs McCorm ickl 124-hr S1 100-yr 1 . 00 hrs 100-yr 1 -hr Rainfall =2 . 73" Area (ac) CN Description 10. 000 85 Row crops , straight row , Good , HSG C 10. 000 100. 00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ftlft) (ft/sec) (cfs) 94.2 1 ,400 0. 0014 0.25 Lag/CN Method, Subcatchment I : Existing Onsite Drainage Area Hydrograph I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I 11111111 A I I- - - 4 - - I - - I- - -k - -I - - I ! -I I 1- -1 I I- -k I I -k -1 I ❑ Runoff 1 ij 9.64 cfs I I I I I I I I I I I I I I I + I I I I I I .„— I I 4 - 41 - 1 - 4444 ■M��4C[1'11�1�C1�_ 9 I I I I I I I I I I I I I I I 100-yr 1 -hr Rainfall =2 .73" I I I I I I I I I I I I I I I I I i i I I I� - -1 I r -r I r T I I r -1 I r -I nR-u-n-off A ea=10.OO0-lc- 8 r I I I I I I I I I I I I I I I Ft' t)1fV0h11me= 14372h1P _� - I Ru ri off " ', Depth= 1 .3 I I I I I I I Flow Len gth =i ,4 00' I I I I I I I I I I I I I I I I I I I E 6-, I I I I I I I I I I I I I I I I I Slope=O .OIO1 41 7 I _ _- I I I I I I I I � _- � _ I_- � - _� I I I I I � I■ I I I I I I I I I I I I I I I I I I Tc794.2 rrrn o 5- I I I I I I I I I I I I I I I I I I I cN =85 - J I L J. I L 1 I I L J I L J I L 1 I J I / 1I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I /r- I I d- 4 I I- 4 I I 4- -I I r — -I I- 4 I I - -I I f fr'�I I I I I I I I I I I I I I I I I I I I I V/ra I I - - - - - I I I I I I - - - - - - I I- i- � - I - � -1- -I I- t- -I I i i -I - �- -I- -I I- 1- i I I I I I I I H I I I I I I I I I I I I I I I f I I I I I I I I I I I I I I I I I I I I - 1 I fi -tI r I I I 1 - - I1 1 r -rI I rt 1I I I I I I I I I I I I I I I I ' I I I I I I I I ‘ /�f�:�j / /{/-rffef t / r �j (/}rrrrf//�/ ! // rf- /(/ffy'J/r/rr/jf/� y<f�f(lf�ff'/� .+//�f rffJj'fJf�/j,j ,/ter f/f�j�jr /ffJ/'f/,r/ter j /�/rJ� r�/r�`f r (CI-4 ///1 C- !0 �J / `! if '. i ( e ! I ! ` '7 ''`'( I / <ey I I '! -£ -.'1/ ,F ! !f / `P F / f i f f:', .�; frf ', /{ z �� i i i ri i i i ' i t i i i I i i r i i i i r i 11 i i i i 11 1 i i i , i 1 i i 1 i 7 r i i �i i I r`i ��!i �T i i i �� i 1 i �, i i �� 0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 Time (hours) 2019-06-'I 7_McCo rmi ckl l-Pre Post Mo armick/l 24-hr S1 100-yr 100-yr 24hr Rainfall=4. 77" Prepared by Westwood Printed 6/ 1712019 HydroCAD® 10.00-19 sin 10449 © 2016 HydroCAD Software Solutions LLC Page 11 Time span= 0. 00-48. 00 hrs, dt= 0. 05 hrs, 961 points Runoff by SCS TR-20 method , UH =SCS, Weighted-CN Reach routing by Stor- Ind+Trans method - Pond routing by Stor- Ind method Subcatchment aIS: Existing Onsite Drainage Runoff Area= 10 .000 ac 0 .00% Impervious Runoff Depth=3 . 16" Flow Length=1 ,400' Slope=0.0014 '1 Tc=94 .2 min CN=85 Runoff=14.39 cfs 2.630 af Total Runoff Area = 10.000 ac Runoff Volume = 2.630 af Average Runoff Depth = 3. 16" 100.00% Pervious = 10.000 ac 0.00% Impervious = 0.000 ac 2019-06-'I 7_McCo rmi ckl l-P re Post Mc o rck/I 24-hr S1 100-yr 100-yr 24hr Rainfall=4. 77" Prepared by Westwood Printed 6/ 1712019 HydroCAD® 10.00-19 sin 10449 © 2016 HydroCAD Software Solutions LLC Page 12 Summary for Subcatchment 1 S : Existing Onsite Drainage Area Runoff = 14. 39 cfs @ 13.22 hrs, Volume= 2. 630 af, Depth= 3. 16" Runoff by SCS TR-20 method , UH =SCS, Weighted-CN , Time Span= 0.00-48.00 hrs , dt= 0. 05 hrs McCorm ickl 124-hr S1 100-yr 100-yr 24hr Rainfall=4.77" Area (ac) CN Description 10. 000 85 Row crops , straight row , Good , HSG C 10. 000 100. 00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ftlft) (ft/sec) (cfs) 94.2 1 ,400 0. 0014 0.25 Lag/CN Method, Subcatchment I S : Existing Onsite Drainage Area Hydrograph - - -I- - -► - - I- - b - -F - -I - - H - + - -I - , , 1 I {- I -1 - - i - t I I t - -i - - I - - 16 I I I I I I I I I I I I I I I I I I I I I I I I 11- 1- I I- - i- - - - - - -F - -I - - 1 i I - - I- - t- — -I — -I - — H — + — -I - - I— - i- -I I l RunO ff � 15 I I I I I '14 .39 cfs I I I I I I I I 1 I I I I I I , I - I- - r - 1 - �� - ; - I - - MCóth1kkll4-1WS11tG-sir 14 j I I 1 H - - -I - F - - II13 I I I IÔoI- r 24hr Rainfall'=4t " HIT1 I I I I I I I I I I I RunoffArea1OGG � ac I I I I 1 i I I I I I I I I I I I- I I I I I I I I I I I I R-u-noff o I-u r17eII=2 630 of 10 I I I I I I I I I I I I I I I I 1 I -I 1 I I I I I 1 1 I Runoff Daptht& 1 6" I I � I ! --I -- I I J I I I I I I I I I IIII I I I III_ ' Ii Len �thr 001 0 - ` I I I I I I z ,r� I I I I I I I I it I_ _ L _ J _ _ I_ _ L _ 1 _ I I L I L J L o. 0 + =O-■ 00 i 4 - I� - - - I I I I I I r I I I I I I I I I I I I I I I I 6 — -I I I - - /' - ; I I I -I I a- -a T - TC79421111n I I I 1 I I I I I I I I I - 4 I I I I I I !r I I I I I I I I I I I I 815 - H 1 I I- - h - , - / -1- - -1 1 1 I 1 { I -1 - - E- - -1- I I 1- - -I - I I I I I I I I I I I I I I I I I I I I I I I t I I 1— — 1— — rt — —1 — —I I I 1 t i I r 1 I I t I I I I I I I I I % I I I I I I I I I I I I I I I T I I— — T - -I I- I I I I I I- I F T I I T -I - - I - - 1 I I I j I rt./7 I I ! I I f// J '/ / :' - f ! /2/ / / er ,i .i ,/' //f , // ;,< /, / ' r / / / r ff .1'; I I , I I I I I I - i I I I I ' , I - I I I 0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 Time (hours) Pr ' . posed Conditions Proposed Onsite Drainage Area Subca Reach Pon . Link Routing Diagram for 2019-06-17_McCormickll-PrePost Prepared by Westwood, Printed 6/17/2019 HydroCADO 10.00-19 sln 10449 © 2016 HydroCAD Software Solutions LLC 2019-06-'I 7_McCo rmi ckI I-ID re Post Prepared by Westwood Printed 6/ 17/2019 HydroCAD® 10.00-19 sin 10449 © 2016 HydroCAD Software Solutions LLC Page 2 Area Listing (selected nodes) Area CN Description (acres) (subcatchment-numbers) 0.200 96 Gravel surface, HSG C (2S) 9.790 71 Meadow, non-grazed , HSG C (2S ) 0.010 98 Unconnected pavement, HSG C (2S) 10.000 72 TOTAL AREA 2019-06-'I 7_McCo rmi ckl l-ID re Post Prepared by Westwood Printed 6/ 1712019 HydroCAD® 10.00-19 sin 10449 © 2016 HydroCAD Software Solutions LLC Page 3 Soil Listing (selected nodes) Area Soil Subcatchment (acres) Group Numbers 0.000 HSG A► 0.000 HSG B 10.000 HSG C 2S 0.000 HSG D 0.000 Other 10.000 TOTAL AREA 2019-06-'I 7_McCo rmi ckI I-ID re Post Prepared by Westwood Printed 6/ 17/2019 HydroCAD® 10.00-19 sin 10449 © 2016 HydroCAD Software Solutions LLC Page 4 Ground Covers (selected nodes) HSG-A HSG-B HSG-C HSG-D Other Total Ground Subcatchment (acres) (acres) (acres) (acres) (acres) (acres) Cover Numbers 0.000 0 .000 0 .200 0.000 0 .000 0 .200 Gravel surface 2S 0.000 0 .000 9 .790 0.000 0 .000 9 .790 Meadow, non-grazed 2S 0.000 0 .000 0. 010 0.000 0 .000 0.010 Unconnected pavement 2S 0.000 0.000 10.000 0.000 0.000 10.000 TOTAL AREA 2019-06-'I7_McCormickll-PrePost McCormickil 24-hr S110-err 1 . 00 hrs 10-yr 1-hr R'arr fa/1= 1. 39 " Prepared by Westwood Printed 6/ 1712019 HydroCAD® 10.00-19 sin 10449 © 2016 HydroCAD Software Solutions LLC Page 5 Time span= 0. 00-48. 00 hrs, dt= 0. 05 hrs, 961 points Runoff by SCS TR-20 method , UH =SCS, Weighted-CN Reach routing by Stor- Ind+Trans method - Pond routing by Stor- Ind method Subcatchment 2S: Proposed Onsite Drainage Runoff Area= 10 .000 ac 0 . 10% Impervious Runoff Depth=0 .08" Flow Length=1 ,400' Slope=0.0014 '1 Tc=140.5 min CN=72 Runoff=0.39 cfs 0.069 af Total Runoff Area = 10.000 ac Runoff Volume = 0.069 af Average Runoff Depth = 0.08" 99.90% Pervious = 9.990 ac 0. 10% Impervious = 0.010 ac 2019-06-'I7_McCormickll-PrePost McCormick/I 24-hr S1 10-err 1 . 00 hrs 10-yr 1-hr R'arr fa/1= 1. 39 " Prepared by Westwood Printed 6/ 1712019 HydroCAD® 10.00-19 sin 10449 © 2016 HydroCAD Software Solutions LLC Page 6 Summary for Subcatchment 2S : Proposed Onsite Drainage Area Runoff = 0. 39 cfs @ 2 .35 hrs, Volume= 0.069 af, Depth= 0. 08" Runoff by SCS TR-20 method , UH =SCS, Weighted-CN , Time Span= 0.00-48.00 hrs , dt= 0. 05 hrs McCormickll 24-hr S1 10-yr 1 . 00 hrs 10-yr 1 -hr Rainfall = 1 . 39" Area (ac) CN Description 9. 790 71 Meadow , non-grazed , HSG C 0.200 96 Gravel surface, HSG C 0. 010 98 Unconnected pavement, HSG C 10. 000 72 Weighted Average 9. 990 99. 90% Pervious Area 0. 010 0. 10% Impervious Area 0. 010 100. 00% Unconnected Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 140.5 1 ,400 0. 0014 0. 17 Lag/CN Method, Subcatchment 2S : Proposed Onsite Drainage Area Hydrograph — 1 rt I r t 1 rt -I I I i 1 I t j 1 1 0,44 L I J I L 1 J I L 1 I I L 1 J I L I I I I I � I I I I I I I I I I I I I I I I I I I I I I Runoff 0.42= 0. 39cfs I I I I I I I I I I I I I I I I I I 0.4 , - 4 I I I I k I 1 1bCdrmi;kkli 24-hr- i 1,'0 =yr 1 .00 hrs 0.3a= , I- .�/ '1 I I I 10 r 1 hr Rainfall - .39•• 0.3 -1 - - I - - f- - t —II I— —rI I L I —I — I 1 I I I I I I I I I I � s. 0.34 i r - _ 1I I L _I I I L _I I I L J I L I-Runoff-Area=10.OQOa_ / I I I I I I I I I I I I I I �+ I 0.32-H' 1- .f' I I T I I T -I I I T I r Runoff-Volume=- 0 :069 Iaf 0.3 1- -1 - - I - - I- - -1- - J I I- -1- I I I I -i I a- - T Ru 11 off `D'epth_0 .0r- � �� _ , I I I I I I I I I I I I I I I I - � I I I I I I I I I I I I I I I I Flow Length = 1 ,400' 1 ,4OfJ „a„ 0.26-f" . IV _ I I- t 1 I I t -i I I- t 1 1- f -1 I 4.m _ ` I,- -I I - - I- I I I I I I I 1 I I �- - I I I l Q_ _. u0.24 i p 0141P - I I I I I I I I I I I I I I I I I I . �,/ I I I I I I I I I I I I I I I I I I _- �� •; �n_ LI 0.2-- - I -� I I- -I- -I I I 4- I I- I -I I 1- I - =7_2_ _ i I I I I I I I I I I I I I I I I I I 1H I I � I I I I I I I I I I I I I I I I I I I I 0. 1 C _ , r T I I T -I I 7 T I I IF -C -I I r T I r -i I I 0. 14=4 I I I I I I I I I I I I I I I I I I I I I I , r/ i'f I I I I I I I I I I I I I I I I I I I 0. 12-_7 " r ' - I I I I I I I I 1 - I I I I I - I 0. 1 _ I I- --I I I- - T I I I- 4 -I I 1- T I T - , I 0.082- , ,, ; f I I I I I I I I I I I I I I I I I I r I I I -1 I I I I I i I I I I I I I I I I I I 0.061 " t 1 1 1 i I I - I I I I 1 I I -t- -I I I -1 - 0.04 ' V/ -I - I I I I I I 1 I I I I I I I I I I I I `- I r'` . I I I I I I I I I I I I 0.02 ,/4- -_ y..j� k`_/` J f{ ( r //J r // // IJ//( / r///J/{/ �f/ Jf f r fff r fff / f T I i i L --,<<T ,-',/{ % 1/r{('"-•i i <�r/ f f 1 ;i (�J -,/, /<- / ! f / / i. .% J ! J f F ( r ! l % / )! 0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 Time (hours) 2019-06-'I 7_McCo rmi ckl I-Pre Post McCormick 24-hr SI10-yr 10-yr 24hr Rainfall=2. 76" Prepared by Westwood Printed 6/ 1712019 HydroCAD® 10.00-19 sin 10449 © 2016 HydroCAD Software Solutions LLC Page 7 Time span= 0. 00-48. 00 hrs, dt= 0. 05 hrs, 961 points Runoff by SCS TR-20 method , UH =SCS, Weighted-CN Reach routing by Stor- Ind+Trans method - Pond routing by Stor- Ind method Subcatchment 2S: Proposed Onsite Drainage Runoff Area= 10 .000 ac 0 . 10% Impervious Runoff Depth=0 .67" Flow Length=1 ,400' Slope=0.0014 '1 Tc=140.5 min CN=72 Runoff= 1 .76 cfs 0.558 af Total Runoff Area = 10.000 ac Runoff Volume = 0.558 af Average Runoff Depth = 0.67" 99.90% Pervious = 9.990 ac 0. 10% Impervious = 0.010 ac 2019-06-'I 7_McCo rmi ckl I-P re Post Mc ormick/I 24-hr SI10-yr 10-yr 24hr Rainfall=2. 76" Prepared by Westwood Printed 6/ 1712019 HydroCAD® 10.00-19 sin 10449 © 2016 HydroCAD Software Solutions LLC Page 8 Summary for Subcatchment 2S : Proposed Onsite Drainage Area Runoff = 1 . 76 cfs @ 13.95 hrs, Volume= 0.558 af, Depth= 0. 87" Runoff by SCS TR-20 method , UH =SCS, Weighted-CN , Time Span= 0.00-48.00 hrs , dt= 0. 05 hrs III cCorm i ck l 124-hr S1 10-yr 10-yr 24hr Rainfall=2 .76" l=2 .7'6" Area (ac) CN Description 9. 790 71 Meadow , non-grazed , HSG C 0.200 96 Gravel surface, HSG C 0. 010 98 Unconnected pavement, HSG C 10. 000 72 Weighted Average 9. 990 99. 90% Pervious Area 0. 010 0. 10% Impervious Area 0. 010 100. 00% Unconnected Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 140.5 1 ,400 0. 0014 0. 17 Lag/CN Method, Subcatchment 2S : Proposed Onsite Drainage Area Hydrograph / I i I till I I I I i I I I I I I I ❑ Runoff I I I I 1 . 176 cis I I I I I I I I I I I I I '` ' I McCoickIf24ihrS1iO -3r, , , , , -,-/1 1 , , , 10 - r4iirRainfa1Ii2 ' 7S " i I I I I i i i i I I I I RunoffAreá= 10 . 000ác i I I I t i i i i I I I i i i i i I I I I i � i i i I I I � i Rupoff Volume=0 . 55,8 of ...... , I I I I i I I I I I 4- I- - + - -I - - - - 4- - 4 - - + - -I - - 1 - - I- - -F - - - - - - + - UnO -DePth - 0 .- "- - ! I I I I I I I I I I I I I Flow Len th = 1 , 40 ' , E I I I I I I I I I I Slope -0 . 00147' I I I I I � � � i I I I I I I � � � , � II I I I I I I I I I I I I Tc 1 40 ■ 5 'm r n I I I I I I / I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I cli =7,2 I I I I I I / I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I ; k , Jr , I I I I I , , , I I I I I I I I I I I I I I I 'A I I I I I I , I I I I I I I I „ „ I I I I I I I I� ff //)I}/ i i i I I I I I 1 1 I I I I I I I I I I I I I I I I 0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 Time (hours) 2019-06-'I 7_McCo rmi ckl I-P re fro Mc ormickII 24-hr S1 100-yr 1. 00 hrs 100-yr 1-hr Rainfall=2. 73 " 73 " Prepared by Westwood Printed 611712019 HydroCAD® 10.00-19 sin 10449 © 2016 HydroCAD Software Solutions LLC Page 9 Time span= 0. 00-48. 00 hrs, dt= 0. 05 hrs, 961 points Runoff by SCS TR-20 method , UH =SCS, Weighted-CN Reach routing by Stor- Ind+Trans method - Pond routing by Stor- Ind method Subcatchment 2S: Proposed Onsite Drainage Runoff Area= 10 .000 ac 0 . 10% Impervious Runoff Depth=0 .65" Flow Length=1 ,400' Slope=0.0014 '1 Tc=140.5 min CN=72 Runoff=3. 10 cfs 0.544 af Total Runoff Area = 10.000 ac Runoff Volume = 0.544 af Average Runoff Depth = 0.65" 99.90% Pervious = 9.990 ac 0. 10% Impervious = 0.010 ac 2019-06-'I 7_McCo rmi ckl I-P re fro Mc ormickII 24-hr S1 100-yr 1. 00 hrs 100-yr 1-hr Rainfall=2. 73 " Prepared by Westwood Printed 611712019 HydroCAD® 10.00-19 sin 10449 © 2016 HydroCAD Software Solutions LLC Page 10 Summary for Subcatchment 2S : Proposed Onsite Drainage Area Runoff = 3. 10 cis @ 2 .32 hrs, volume= 0.544 af, Depth= 0. 65" Runoff by SCS TR-20 method , UH =SCS, Weighted-CN , Time Span= 0.00-48.00 hrs , dt= 0. 05 hrs McCorm ickl 124-hr S1 100-yr 1 . 00 hrs 100-yr 1 -hr Rainfall =2 . 73" Area (ac) CN Description 9. 790 71 Meadow , non-grazed , HSG C 0.200 96 Gravel surface, HSG C 0. 010 98 Unconnected pavement, HSG C 10. 000 72 Weighted Average 9. 990 99. 90% Pervious Area 0. 010 0. 10% Impervious Area 0. 010 100. 00% Unconnected Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 140.5 1 ,400 0. 0014 0. 17 Lag/CN Method, Subcatchment 2S : Proposed Onsite Drainage Area Hydrograph I 1 1 I I I I I I I (7/1 li till I I I I I I I i i i I i i ' I I Runoff I 3. 14 cfs I I I ' I I I I I I I I i H - - I- - : - FI - -II - - - - H - - I - I - - -' MtCor',midkll24-1 24-hr S1100-yr- 1.90h;rs , i 100-yr 1 -hr F ainfall =2 .7� " I, I I I , I I I I I Runoff Area = 10.000 at ! ' / III , , Runoff 1 olume=0 .$44 ,af -' IIIill , I I I I I I 'Runoff Depth t3 .6 " 0 .65" ►, -, I 1- -t II fi -1 I I- -t I t -, I -Flw-�o Len th= i ,400' - c = till I I I I I I I I Tope=0 .0014 - d/ ' I I I ' I LI I LI Trr= 40 '5 njin I I I , , ,i i i i i i , i i ,� 1 / i .4 I t 1 1 1 I I 1 1 I I I I I 1 1 I I 1 1 1 / 1 ff I 1 1 1 1 I I 1 1 I I I I I 1 1 I I 1 1 I I/ I I 1 1 1 1 I I 1 1 I I I I I 1 1 I 1 1 1 / 1 w// 1 1 1 1 I I 1 1 1 1 I I 1 1 1 7/ I 1 1 1 1 I I 1 1 I I 1 1 I I 1 1 1 _ 1 1 1 1 1 1 I I 1 1 I I I I I 1 1 I I 1 1 1 x 1 7,� I 1 1 I 1 I I I 1 I I I I I I 1 I I 1 1 1 1 :> 1 I I I I I I 1 1 1 1 II I 1 1 €.4rf-"terJI/'/ J 'y�r �//, /,r //" J /f /�/,�,`1/27/7,7/! - 7) - /'�,,,, /47/ ,',,�' ,'rte 7 . r,t / {ti / //2 ,f rr�.., f, '/7/ ./I :I('2,2' / /,/, -'; ',f''/,./'`r/rf 0 2 4 0 8 10 12 14 16 18 20 22 24 20 28 30 32 34 30 38 40 42 44 40 48 Time (hours) 2019-06-'I 7_McCo rmi ckl l-Pre Post Mo armick/l 24-hr S1 100-yr 100-yr 24hr Rainfall=4. 77" Prepared by Westwood Printed 6/ 1712019 HydroCAD® 10.00-19 sin 10449 © 2016 HydroCAD Software Solutions LLC Page 11 Time span= 0. 00-48. 00 hrs, dt= 0. 05 hrs, 961 points Runoff by SCS TR-20 method , UH =SCS, Weighted-CN Reach routing by Stor- Ind+Trans method - Pond routing by Stor- Ind method Subcatchment 2S: Proposed Onsite Drainage Runoff Area= 10 .000 ac 0 . 10% Impervious Runoff Depth=2 .02" Flow Length=1 ,400' Slope=0.0014 '1 Tc=140.5 min CN=72 Runoff=6.55 cfs 1 .685 af Total Runoff Area = 10.000 ac Runoff Volume = 1 .685 af Average Runoff Depth = 2.02" 99.90% Pervious = 9.990 ac 0. 10% Impervious = 0.010► ac 2019-06-'I 7_McCo rmi ckl l-P re Post Mc o ick/I 24-hr S1 100-yr 100-yr 24hr Rainfall=4. 77" Prepared by Westwood Printed 6/ 1712019 HydroCAD® 10.00-19 sin 10449 © 2016 HydroCAD Software Solutions LLC Page 12 Summary for Subcatchment 2S : Proposed Onsite Drainage Area Runoff = 6. 55 cfs @ 13.89 hrs, volume= 1 .685 af, Depth= 2 . 02" Runoff by SCS TR-20 method , UH =SCS, Weighted-CN , Time Span= 0.00-48.00 hrs , dt= 0. 05 hrs McCorm ickl 124-hr S1 100-yr 100-yr 24hr Rainfall=4.77" Area (ac) CN Description 9. 790 71 Meadow , non-grazed , HSG C 0.200 96 Gravel surface, HSG C 0. 010 98 Unconnected pavement, HSG C 10. 000 72 Weighted Average 9. 990 99. 90% Pervious Area 0. 010 0. 10% Impervious Area 0. 010 100. 00% Unconnected Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 140.5 1 ,400 0. 0014 0. 17 Lag/CN Method, Subcatchment 2S : Proposed Onsite Drainage Area Hydrograph I I I I i I 1 1 I I I I I I I 1 I I I I - - -I- 4- -I I I -I- -I I I- -I. I- -I- I I- -I- I I -I I I I I I i . i i I I I I I I I I till , ❑ Runoff I I I I 1 6.55 cis I I I I I I I I I I I I I I I 1 �/ I I Mctormickll24- hrSllOO4r I I I I I I I / I I I I I I I I 6 I I I I I F I I I I I I 100 6 r' 24hr ' Ra i nfa l l'=4i 77 " , I I I I � i� � � , I I I I � I I I I I I RutmffArea= tO .OOOac - I I I I I I I I I I I I Runoff volume'= 1 . 685 of I t I I 1 I I I I I 1 I I I ea. - -1 - - I- - r - 7 - - r -I I r ? I I -r - unoffDe-p-th =20*"-II 1I I I I I I I I 1 I I I I I I I 1 I I I I I I I I IFlow ' Length - 1 , 4O0 3- J I I I I I I I I I I I I I I I Slope =0 . 0014 'I' I I I f I I I I I Iii I , ii ii Tp= 14Q . 5 ;min I I I I 1 I I I I I I I I I I CN = 72 2- �� I I I I I � � � I I I I I I I I I , � HJL1IHHHHH 1 I I I I I I I I I I I I I I I I I 1 I I I I I I I I I I f // ,/ --- ' .! / f / ' " ":2.1 „ /,/ !c': lf�('36(!� /lr�:'/fir ,! /` ! / 2 / f/'f // fi' 0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 Time (hours) 7, sts USDA Web o scarve ts • tj j { l;, Hydrologic Soil Group—Weld County, Colorado, Southern Part tm,b (2019-05-16_Boundary) g lag 513420 513470 513520 513570 513620 513670 513720 513770 40° 151" N O - - = - - - I � - _. 40° 15' 1" N 1 ` X111 -%, C. P - r t. s . - - - ' s _- le, -Sr n n Sa r tit ,7 T *Mk-. ' r a� a 1 l r 141 Y oil" ll i . ,, 4' i I 1l Si ti 1 lIl It .. f • M 0 u 4 . • i .. . I , • i • , n , 1 a tr. . r r i 1 t- , it_. di 10Iii 14' II 11 a �. � L 1 ' fell , n 1 O LL /,. ° 4 I r t 4 , rh • M Mrem � r r w y. . ti `1 . + . I ` 1 11 1 -•4 . .A t �i ata i + . , a i ‘, 1W . . r �' , , W 4. _ ►, li krlc „ ,. N: . f i LD L a i is Q r1, w . ice w a ` W a_ } F . 1. '1 4.i toli i - •. L ,I - • • 4. : .1 w _. i , , I . —County ' oa . 36 - - a_ _ ar.15 ---- -i.R , (rip irs i1/4 40° 14' 4b" N - I �- ^ I alie114- 40° 14r X11 N 513420 513470 513520 513570 513630 513670 513724 513770 N F. b Map Scale: 1 :2,290 if printed on A portrait (8.5" x 11") sheet ..th -• c:4 Meters N 0 30 60 120 180 l I liFeet A 0100 200 600 Map projection : Web Mercator Corner coordinates: WG584 Edge tics: UTM Zone 13N WGSS4 Natural Resources Web Soil Survey 6117/2019 a Conservation Service National Cooperative Soil Survey Page 1 of 4 03 �. 0 O O N a) O r 2_ O) to m eL 02 a3 C7 0 co N N L N › c O +, O a 0C? s` (� 03r 3 C tU 'a 5 -o CO n ova u) u cin = L a O O cf) +- _ ° tit) O a ten O L a _c cu z t‘isn 0 CD tt) E O i C) -C � � t1} , o . . _ 4 LE O c z . O C CL O M' 3 CO 2 O O O 70 ft4 `� R} a 00 Oen 0 32 CD S? al s4 O }' L C O O (f) c3 o.) • t a E LL �U +-` C 0 CL?2 N .� C CO? I--. C E >+ co O a >0 5" 5 4) c ET!) S r co cU O •L. c O i O -0 cc c3 a c� .C -4 _ L: .0 t!) L O ° "O 2 `� O -Q O Co O O L O -a ft t!Oa eD Z D E ' I a O 0 O Oar) . . 6 0 L Cu O •C77 N 'C C ft) >1 �--' -c L7 N Ox 03 ca a) 3 ? zs • — 0 � ' C O_ v > O E Qom 3 ,w p u) L • O -�cc cv �f 4 a . co — Q id) ' N o . N O O c 2000 ° O 0 0 ° 2 ° ac O. 0 - n O C 0 -o cc �' O O O 1 ' �5 ^ r .Q} + use 'E i"33 _ 1. L O Ow L P c0 — O C s- 15 a o cl) O O a O a IS 0 cI34} C O 3 th _ —_ o 4) C� o f N O .- C o e 0 • C) 0 ° O c '2 .0 n o "E 'O 3 .O tP C13 c a E n _, H r W E — c 7 uy CL E U� C, 2 s_ Z3 t HO (0 03 (,f) r O cC i Ho ._ cn 3 0 CO O > n O ?* , 0) O U -0 '3 - a 3 3 CO u7 a TO 9,CZ I CC CL N o 0 is C -D n co '�� 0 0 z —0 E Le . O CC OC t7- t-) d p m m c 'rico arc Sa co 'CD 2 Iii 0 2 O a to s t= IJ.I i u I- m W J 4) a) LE 121 a. tz tv T cz .073 tv 2 cc cc _ c o 0 t ,- 0 O cn 0 cfp — I C C 0 •_ aa a a O O O 6 C O O CQ a c1 ci CD ct co 4 cc rn oC] 0 0 0 7 ct en m 0 0 0 7 t < c( ad t�0 a) 4 c C C 0 ._ ._ ._ tU S •d3 4� •— 11111111a- I t * 1. % % 1 ® 0 0 ® V) > L •5 t) F ) = 4, Rs ito 3 c Hydrologic Soil Group—Weld County, Colorado, Southern Part 201 9-05-1 6_Bou n dart' Hydrologic Soil Group Map unit symbol Map unit name Rating Acres in AOI Percent of AOI 21 Dacono clay loam, 0 to C 4 .9 48.6% 1 percent slopes 22 Dacono clay loam, 1 to C 1 .2 11 .9% 3 percent slopes 39 Nunn loam, 0 to 1 C 4 .0 39.5% percent slopes Totals for Area of Interest 10.0 100.0% Description Hydrologic soil groups are based on estimates of runoff potential . Soils are assigned to one of four groups according to the rate of water infiltration when the soils are not protected by vegetation , are thoroughly wet, and receive precipitation from long-duration storms . The soils in the United States are assigned to four groups (A, B , C , and D) and three dual classes (AID , BID , and CID). The groups are defined as follows : Group A. Soils having a high infiltration rate (low runoff potential) when thoroughly wet. These consist mainly of deep , well drained to excessively drained sands or gravelly sands . These soils have a high rate of water transmission . Group B . Soils having a moderate infiltration rate when thoroughly wet. These consist chiefly of moderately deep or deep, moderately well drained or well drained soils that have moderately fine texture to moderately coarse texture . These soils have a moderate rate of water transmission . Group C . Soils having a slow infiltration rate when thoroughly wet. These consist chiefly of soils having a layer that impedes the downward movement of water or soils of moderately fine texture or fine texture. These soils have a slow rate of water transmission . Group D . Soils having a very slow infiltration rate ( high runoff potential) when thoroughly wet. These consist chiefly of clays that have a high shrink-swell potential , soils that have a high water table , soils that have a claypan or clay layer at or near the surface , and soils that are shallow over nearly impervious material . These soils have a very slow rate of water transmission . If a soil is assigned to a dual hydrologic group (AID, BID , or CID), the first letter is for drained areas and the second is for undrained areas . Only the soils that in their natural condition are in group D are assigned to dual classes . USDA Natural Resources Web Soil Survey 6/ 17/2019 all Conservation Service National Cooperative Soil Survey Page 3 of 4 Hydrologic Soil Group—Weld County, Colorado , Southern Part 2019-05- 16 Boundary Rating Options Aggregation Method: Dominant Condition Component Percent Cutoff: None Specified Tie-break Rule .- Higher USDA Natural Resources Web Soil Survey 6/ 17/2019 a Conservation Service National Cooperative Soil Survey Page 4 of 4 Westwood Draina : e emo and Erosion Control Plan for the McCormick II Solar Project County of Weld , Colorado Prepared for : Prepared by : Brendan Miller, PE Westwood Professional Services Ioaks 12707 Whitewater Drive, Suite 300 � Minnetonka, MN 55343 ENERGY PAkT4E Project Number: 0022055 . 00 Date: 05/16/2019 CONTENTS YV E VT ITE i .!. . . . . . ... . . . . t,.. . . . •. . . . . l•l . . . ... • . . . I I '.OO . . . 960 • • • O a . . . i 2 GENERAL DESCRIPTION OF PROJECT DRAINAGE6EIN . . . BOB . . . .. . . . . . . . . . . trt . . . Bat . . . .r. . . . .. . . . . ... . . . . r tee . . . . ell . . . ... . . . tee ETENTI N I V i1' TER REQuEsT ■ ■ ■ ■ ■ ■ . . . • . • •• • • • • , iO . . . .l . . . . It 2 sEDilviENT AND ERosioN cONTI.OL Ft AN . . . ••. . . } r•r } . • .•O . . . .. . . .. .. . . . ...3 1 • of r 7 , (0 to months) . ..i! ■ . ■ ir.! . . . • • • • • • .i .�. . ■ . ...i . . !,.I�Li�r1 �111��1L4�� 3 ■ . r ■ . . rrr . . . r .r . . . srs . . . rr . . . . rrr . . . .r,. . . . rr • CONCLUSION . . . . ..• • _ 4 Drainage Memo and Erosion Control Plan 1 McCormick ii Solar Project PROJECT SITE This Drainage Memo and Erosion Control Plan has been prepared on behalf of Oak Leaf Energy Partners for the proposed construction of the McCormick II Solar Project in Weld County, Colorado hereinafter referred to as the project. The proposed development is located in the SW1/2 Quarter of Section 1 , Township 3 North, Range 67 West of the 6th Prime Meridian. More specifically the project site is approximately 10. 0 acres of land and is located approximately 2. 5 miles northwest of Platteville and approximately 1 .25 miles west of the intersection of Weld County Road (WCR) 336 and U. S. Hwy 85 , State of Colorado. GENERAL DESCRIPTION CR1 OF PROJECT It is proposed to develop approximately 10 .0 acres of land for the project of an approximate 2MW solar array. The solar array will deliver renewable energy to Xcel Energy under a 20-year power purchase agreement (PPS.).. The facility is designed for un-manned operation except for bi-annual maintenance. Therefore, this facility will not represent any significant traffic impact to the surrounding county roads . Upon termination of the PPA, the improvements will be removed and the land will be restored to historic conditions . DRAINAGE DE S I GN The solar array footprint will develop on approximately 7 . 6 acres of the 10 .0 acre project area with approximately 40% of solar footprint area being left as open space and exposed to the sky. The panels will be installed on a post and mounted above ground, and vegetation will grow underneath the panels with a low growth native grass . With this development, very little impervious area is added to the existing drainage system, therefore a waiver is requested to allow the site to surface flow un-detained and exempt from the requirement of providing stormwater detention ponds, see below . Stormwater will surface flow west in general historic paths to the existing channel. Due to the limited amount of impervious surface proposed and the conversion of the site from row crops to a vegetated cover, a decrease in the peak runoff rate is expected to be observed. There are no known drainage issues to occur in the vicinity of the proposed development. E TENT ION POND WAIVER REQUEST With the development of this site, vegetation will be allowed to grow underneath the solar panels, therefore very little imperviousness is added to the site due to the proposed improvements, therefore a waiver is requested to allow the site to sheet flow in historic flow conditions and no detention pond required. The waiver being requested is Exception 1 .a.8 , which states : I . Exceptions to stormwater detention shall not jeopardize the public health, safety, and welfare of public and private property and shall be l im ted to the following: Drainage Memo and Erosion Control Plan 2 McCormick 1l Solar Project a. No stormwater detention will be required for sites that meet any of the following conditions. Requirements of the Municipal cipal Separate Storm Sewer System ( S4) areas remain applicable. 8. Development of sites where the change of use does not increase the impenio ttsn ess of the site. Water quality will be provided by the disconnected impervious and the proposed vegetation below the panels. With the acceptance of this drainage waiver, Weld County will not require stormwater detention or water quality ponds . Upon future development or re-development of the site, the drainage design will be required to be investigated to determine future drainage needs. With the proposed design, stormwater will surface flow south and will be conveyed to the existing irrigation ditch in historic volumes and rates . SEDIMENT AND EROSION CONTROL OL PLAN Throughout the life of this project, Oak Leaf Energy Partners will utilize on- site vegetation and other best management practices to control erosion and sediment from being generated and transported offsite. During construction (0 to 3 months) The site contractor will utilize water trucks as needed to control fugitive dust from any disturbed areas and from the access road. Vehicle speeds will be limited to 10 miles per hour or less to reduce dust being generated by vehicles accessing the site . To minimize water usage , the site contractor may treat the access roads with approved dust suppression or dust abatement products, if needed. Water used for dust suppression during the construction phase will be provided by a local water provider as selected by the site contractor. It is expected that the construction phase will last 3 months . BMl ' s will be installed as needed to control and protect downstream properties . At a minimum, the contractor shall install silt fence or construct a compacted earthen berm along the downstream edge to capture and control surface runoff off Stormwater will be filtered through the silt fence or allowed to infiltrate in to the soil with the compacted berm. If additional BMW ' s are required, then they will be installed by the contractor. Post construction (3 months to 20+ years) The site contractor will seed all disturbed areas with a native dryland seed mix and will nurture until the vegetation is considered established, thereby reducing sediment migration and fugitive dust in the ultimate condition. Once the solar array is constructed, it is anticipated that a maintenance trucks will only visit the site on a bi-annual basis to inspect the site or to perform facility maintenance and repair. • aily traffic will not be generated by this development vegetation within the project site will be maintained in a quality and health state and mowed annually. If any vegetated areas are disturbed during facility maintenance activities, these disturbances will be re-vegetated as soon as practical, but in no case longer than 3 months shall pass . Long term erosion control is provided by the established grasses . Drainage Memo and Erosion Control Plan 3 McCormick ii Solar Project CONCLUSION The proposed site improvements will result in no substantial change to peak runoff rates or volumes and therefore stormwater runoff is allowed to sheet flow consistent with historic flow routes. With the development of this site with a. solar garden, there will be no impact to downstream drainage patterns and will not cause additional health or safety concerns to neighboring properties . Drainage Memo and Erosion Control Plan 4 McCormick ii Solar Project leaf ENERGY PARTNERS Community Meeting Oak Leaf Solar 40 LLC is being developed adjacent to a nearly identical project, constructed in 2018-2019, on the same landowner's property. Through the community engagement conducted as part of that now operating project, Oak Leaf Solar 29 LLC, Oak Leaf Solar 40 LLC feels that there is significant ongoing stakeholder engagement and elects to forego a community meeting at this point in time. Oak Leaf Energy Partners 2645 E. 2nd Avenue, Suite 206 Denver, CO 80206 g 61 fl/_, ■� ^^� �,r_ Notice � f reek, Weld County -Al er1/4\ Pre-application Case # PRE19 -0010 Date of Inquiry 1/25 /2019 Municipality Platteville CPA Name of Person Inquiring Mike McCabe c/o Oak Leaf Solar Property Owner Todd McCormick Planner Angela Snyder Planner Phone Number 970-400-3525 Planner Email Address asnyder@weldgov. com Legal Description Part N2SE4 and E2SW4 of 1 - 3-67 Parcel Number 147131000038 Nearest Intersection CR 36 & CR 25 Type of Inquiry Small Scale Solar Facility The above person met with County Planning staff about developing a parcel of land inside your designated Intergovernmental Agreement/Coordinated Planning Agreement Boundary . 1 it c * 1)? (-)1( 17 le. f 'L _''1-'t. ount Planner's signature Would you like to pursue annexation of this property? NO YES Date of Contact July 21 2019 Comments: The Town of Platteville has no interest in annexing the property and no concerns with the proposal at this stage of review. HeL&na' 1Cendri1ck' Town Planner July 2, 2019 Signature of Municipality Representative Title Date Please sign and date to acknowledge that the applicant has contacted you and return this signed form to Weld County Department of Planning Services. Weld County Planning Department 1555 N 17th Ave, Greeley, CO 80631 ' ( 970) 400-6100 (970) 304-6498 Fax 20181107 Colorado Secretary of State V-File d Date and Time : 09/20/2018 11 : 56 AM Document must be filed electronically. ID Number: 20181735914 Paper documents are not accepted. Fees & forms are subject to change. Document number: 20181735914 For more information or to print copies Amount Paid: $50.00 of filed documents, visit www.sos.state .co.us . ABOVE SPACE FOR OFFICE USE ONLY Articles of Organization file pursuant to § 7 -90-301 and § 7-80-204 of the Colorado Revised Statutes C.R. .) 1 . The domestic entity name of the limited liability company is Oak Leaf Solar 40 LLC (The name ofa limited liability company must contain the term or abbreviation ,1r"limited liability company ", ..ltd. liability company ", "limited liability co. ", "ltd. co. ",Liabi it "limited ", "1. 1. c. ", "llc ",. or -ltd. ". See §740401, 01, (Caution: The use of certain terms or abbreviations are restricted by law. Read instructions for more information.) 2 . The principal office address of the limited liability company' s initial principal office is Street address 2645 E 2nd Avenue, Suite 206 (Street number and name) Denver CO 80206 (City) (Sta te) RIP/Postal Code) United States (Province — i, applicable) (Country:) Mailing address (leave blank if same as street address) (Street number and name or Post Office Box information) (City) (State) (ZIP/Postal Code) (Province — if applicable) (Country) 3 . The registered agent name and registered agent address of the limited liability company' s initial registered agent are N an e (if an individual) (Last) (First) (diddle) (Suffix) or (if an entity) Oak Leaf Energy Partners Ohio LLC (Caution~ Do not provide both an individual and an entity name.) Street address 2645 E 2nd Avenue , Suite 206 (Street number and name) Denver co 80206 (City) (State) (ZIP Code) Mailing address ( leave blank if same as street address ) 'Street number and name or Post Office Box irk f ormation) ARTORC_LLC Page 1 of 3 Rev. 12/01 /2012 Co (City) (State) (ZIP Code) (1_he fiallowing statement is adopted by marking the box) K The person appointed as registered agent has consented to being so appointed. 4 . The true name and mailing address of the person forming the limited liability company are Name (if an individual) (Last) (First) (Middle) (Suffix) or (if an entity) Oak Leaf Energy Partners Ohio LLC (Caution: Do not provide both an individual and an entity- nammme.) Mailing address 2645 E 2nd Avenue , suite 206 (Street number and name or Post (Vice &n information) Denver CO 80206 (City) (State) (ZIP/Postal Code) United States (Province — if applicable) (Country) (tithe Ibilowing statement applies, adopt the statement by marking the box and include an attachment:) ❑ The limited liability company has one or more additional persons forming the limited liability company and the name and mailing address of each such person are stated in an attachment. 5 . The management of the limited liability company is vested in (Mark the applicable box) one or more managers. or K the members . 6 . (Thefoiioiving statement is adopted by marking the box.) K There is at least one member of the limited liability company. 7 . (If the following statement applies, adopt the statement by marking the box and include an attachment) ❑ This document contains additional information as provided by law. 8 . (Caution: Leave blank if the document does not have a delayed effective date. Stating a delayed effective date has significant legal consequences. Read instructions before entering a date) ('If'the following statement applies, adopt the statement by entering a date and, if applicable, time using the required format.) The delayed effective date and, if applicable, time of this document is/are (mrnidd1j'y ,y hour{:minute a nili in) Notice: Causing this document to be delivered to the Secretary of State for filing shall constitute the affirmation or acknowledgment of each individual causing such delivery, under penalties of perjury, that the document is the individual's act and deed, or that the individual in good faith believes the document is the act and deed of the person on whose behalf the individual is causing the document to be delivered for filing, taken in conformity with the requirements of part 3 of article 90 of title 7, C.R.S . , the constituent documents, and the organic statutes, and that the individual in good faith believes the facts stated in the document are true and the document complies with the requirements of that Part, the constituent documents, and the organic statutes . ARTORG LLC Page 2 of 3 Rev. 12101 /2012 This perjury notice applies to each individual who causes this document to be delivered to the Secretary of State, whether or not such individual is named in the document as one who has caused it to be delivered. 9. The true name and mailing address of the individual causing the document to be delivered for filing are McCabe Michael (Last) (First) (Middle) (Suffix) 2645 E 2nd Avenue, Suite 206 (Street number and name or. Post Office Box information) Denver CO 80206 (City) (State) (ZIP/Postal Code) United States . (Province if applicable) (Country) (If the following statement applies, adopt the statement by marking the box and include an attachment) This document contains the true name and mailing address of one or more additional individuals causing the document to be delivered for filing. Disclaimer: This form/cover sheet, and any related instructions, are not intended to provide legal, business or tax advice, and are furnished without representation or warranty. While this form/cover sheet is believed to satisfy minimum legal requirements as of its revision date, compliance with applicable law, as the same may be amended from time to time, remains the responsibility of the user of this form/cover sheet. Questions should be addressed to the user' s legal, business or tax advisor(s) . ARTORG LLC Page 3 of 3 Rev. 12/01 /2012 Hello