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Home My WebLink About20181034.tiffUSE BY SPECIAL REVIEW (U APPLICATION DEPARTMENT OF PLANNING SERVICES * 1555 N,17Th AVENUE t GREELE'' , CO 80631 ww.weldaay.com * 970453-6100 EXT 3540 Jr FAX 9TO-3 498 FOR PLANNING DEPARTMENT_' E: AMOUNT APPLICATION RECEIVED BY DATE RECEIVED: CASE fit ASSIGNED: PLANNER ASSIGNED. Parcel Number': Address of site: 2 1 1 N/A _ 0 0 0 1 6 Legal Description: SE4 9-3-66 E O N300" & E225' ALSO EXC U Section: 09 Zone District Ag Acreage: 12112 FEED NER() OF THE PROPERTY: : Name: Chafes T Anderson Floodplain: ai n: }A 12 digit number on Tax ID. information, obtalnebta at Township: 03 N Range: 66 eniogic it Hazard: YCNO Airport Overlay: 1YONI Company: Phone : 970-215-3607 Street Address: - 14900 County Road 36 Email: tdcityequip( aol.corrn City/State/Zip Code: Name: Platteville, CO 806511 Cornpa ny; Phone : Street Address: - CityI tate/Zip Code: Name: Email: -or Company: Phone it: Street Address: City/late/Zip Code: Email: A E U AN"',I'_ OR AUTHORIZED AGENT: (Se. hetet Authorization mist accompany all applications signed by Authorized Agents) Name: Oak Leaf Solar XXVIII LLC Company: Oak Leaf Energy Partners Phone ft: 720-739-7413 Street Address: 2645 E. 2nd Ave Email: kyle oakieafep.corn City/State/Zip Code: Denver CO, 80206 PROPOSED USE, Use By Special Review. - Small Solar Facility I ( e) hereby depose and state under penalties of perjury that all statements, proposals,, and/or plans submitted with or contained within the application are true and correct to the best of my (our)knowledge. Signatures of all fee owners of property must sign this application. If an Authorized Agent signs, a letter of authorization from all fee owners must be included with the a.phcaban.. If a corporal is the fee owner, notarized evidence must be included indicating that the signatory has to tegaJ r th ' oration_ r inha Lit rint Na e orized Agent 1-42-c.12( V'S 10 Lcca Signature: Owner or Authorized Agent Date Print Name REN 412016 DEPARTMENT OF PLANNING AND BUILDING DEPARTMENT T OF PUBLIC HEALTH AND ENVIRON'NMENT 1555 NORTH 171'_; AVENUE GREELEY, LEY, O 80631 AUTHORIZATION FORM FOR BUILDING, PLANNING AND HEALTH DEPARTMENT PERMITS AND SERVICES 'MILS Aisetet ca-siv (Owner- _ please print) ;. give permission to SD trar- k VIII replica ten9en! - please fr,Ift), to apply for any Planning, Building or Health Department permts or services on our behalf, for the property located at: Legal Description: ,5c'f. of Section F Township l 1, Range it W Subdivision Name: _ Property Owners Informatiion: Phone: tin ° - c lot's Lot Block E-mail: '4*.t't at eat rcv! aci I a co ers Applicant/Agent Contact Information: Phone: 2 13cla 7M13E-Mail: &O t r Email correspondence to be sent to: Owner Ap.pl?cant/Agert Both Postal service correspondence to be sent to: (choose only one) Owner Applicant/Agent Additional Info: Owner Signature: � Date: - `/ / ," Owner Signature: Date: ENERGY PARTNERS Use by Special Review — Small Scale Solar Facility Anderson Solar c/o Oak Leaf Solar XXVIII LLC Version: Original January 10, 2018 Oak Leaf Energy Partners 2645 E. 2nd Avenue, Suite 206 Denver, CO 80206 Weld County USR Application Oak Leaf Energy Partners 1.1:1.1 Planning Questions: Planner on Call 970-353-6100 x3540 1. Explain, in detail, the proposed use of theproperty. • Oak Leaf Solar proposes to construct a 2MW DC solar farm on approximately 12 acres of land near the Town of Platteville, on a site which currently lies dormant. The solar farm will generate approximately 3,358,000 kWh annually, about the equivalent of 400 homes. • The solar array will deliver electrical energy to Xcel Energy for 20-30 years through the company's "Solar Rewards* Community" program, and will be interconnected by December 31, 2018 at the latest. • 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 DC power to alternating current (AC). The solar farm will be connected to the Xcel's Energy's distribution network. • The solar farm will be enclosed in a fenced area and will not create any noise disturbances to surrounding neighbors. The panels will sit �8 feet off the ground and will be facing south if we elect to utilize a fixed tilt system, or they may track the sun on a single axis. Our decision is contingent on results from our engineering partner being positive in regard to topography and space, among other things. 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 the FAA has concluded reflectivity is not an issue. We would like to construct the facility beginning in Q2 2018. 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 WCR 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 per 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 chain link 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 system 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 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 Page 2 of 13 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 22-4-80 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. 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 23-3-4ONN as a Use by Special Review for a Small Scale Solar Facility. 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 dry, vacant land surrounded by agriculture. The land owner on which we are constructing this solar facility was encouraged by the possibility 5. What are the hours and days of operation? (e.g. Monday thru Friday 8:0O 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 farm will generate electricity during daylight hours. Operations and maintenance crews will be on -site twice annually for about 4 hours per day. List the number of full time and/or part time employees proposed to work at this site. Page 3 of 13 • 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. 7. If shift work is proposed include the number of employees per shift. • Not applicable - this is an un-manned facility. 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. 9. If this is a dairy, livestock confinement operation, kennel, etc., list the number and type of animals. • N/A 10. Describe the type of lot surface and the square footage of each type. (e.g. asphalt, gravel, landscaping, dirt, grass, buildings) • 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. 11. How many parking spaces are proposed? How many handicapped (ADA) parking spaces are proposed? • Not applicable. The site is un-manned 12. Explain the existing and proposed landscaping for the site. • The existing landscape for the site is dry agriculture and native grasses, surrounded on three sides by a ditch (owned by Platte Valley Irrigation Company), and an active, center -pivot farming operation on the only side not bounded by the ditch. The closest structures are oil wells, 1A. mile away at the nearest point. The closest road is also �/� mile away, but in-between the site and the road lie the ditch, farmland, and utility transmission lines. The closest home is 1/3 mile away, who's view shed will be preserved by almost the entire cross section of the center pivot farming operation in between our solar array and their home. • For this reason, it is expected there will be minimal - if any - buffering requirement, as the visual impact of this proposal is limited in nature. There are very few trees in the area, and therefore additional trees are not proposed. • 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 1=3 Page 4 of 13 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. i 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. 13. Describe the type of fence proposed for the site (e.g. 6 -foot chain link with earth tone slats) i The proposed fence is Colorado Parks and Wildlife's preferred "wildlife friendly" fence, 8' tall with a smooth top wire. 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. 15. Explain any proposed reclamation procedures when termination of the Use by Special Review activityoccurs. • 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. 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) 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 April 15, 2018 - May 31, 2016 • Seeding/Mulching and Site Stabilization June 1, 2018 - June 15, 2018 • Solar Garden Component Delivery June 1, 2018 - June 30, 2018 • Perimeter Fence Installation June 1, 2018 - June 30, 2018 Solar Panel Foundation Installation July 1, 2018 - September 1, 2018 • Transformer and Inverter Installation August 1, 2018 - September 1, 2018 • Solar Panel Installation July 15, 2018 - September 30, 2018 J [S C5 Page 5 of 13 1.1.1.2 Engineering questions: 970-353-6100 x3540 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) MMbble I Vehicle Trip Generation Project (Time Period) Phase Vehicle Type Estimated Vehicle Gross Weight Number of Vehicles Per Day Maximum Average Trips Per Vehicle and Day (approx. Site Preparation 4-6 weeks) Equipment Trucks Hauling 30,000-65000 lbs 0-2 i0 -d4 Passenger Vehicles 20000-10000 lbs 2:-5 4-10 Fuel Delivery 20,000-30,000 lbs 1 2 Max -16lAve-6 Equipment (approx. Material 4 and Delivery weeks) Conex Delivery Container Trucks and 30,000-50,000 lbs 5-15 10-30 Equipment Trucks Hauling 20,000-40,000 lbs 0-4 0-8 Max _38/Ave-1D Solar Installation (4-5 months) Garden Passenger Vehicles 2,000 to 10,000 lbs 10-15 20-30 Fuel Truck 20,000 to 30,000 lbs 1 Material Bruck. Delivery 20,000 to 30,000 lbs 1 _2 2 Max34/Ave a ,24 Operations (ongoing operational) once Utility Vehicle 2,000 to 10,000 lbs 1 per month or less Max - 2/Ave - 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. 3. Describe the travel distribution along the routes (e.g. 50% of traffic will come from the north, 20% from the south, 30% from the east, etc.) • Traffic distribution is expected to be 95% from Highway 85 as described above and less than 5% from any other route. 4. Describe the time of day that you expect the highest traffic volumes from alcove. • 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. 5. Describe where the access to the site is planned. Fr• =t1 :=1 Page 1of13 • It is expected that the main site access will be via a pre-existing road owned by the Platte Valley Irrigation Company approximately 900' West of the intersection of WCR 36 and WCR 31. No additional road work is proposed at this time. 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 offlow across the proper 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 narrative for answers to the above questions. Page 7of13 1.1.1.3 USE BY SPECIAL REVIEW (USR) QUESTIONNAIRE (PAGE 2) Environmental Health questions: 970-304-6415 x2702 1. What is the drinking water source on the property? If utilizing a drinking water well include either the well permit or well permit application that was submitted to the state -Division of Water Resources. If utilizing a public water tap include a letter from the Water District, a tap or meter number, or a copy of the water bill. • Since this is an un-manned facility a domestic water tap is not needed. Bottled water will be provided during construction. 2. What type of sewage disposal system is on the property? If utilizing an existing septic system provide the septic permit number. If there is no septic permit due to the age of the existing septic system, apply for a septic permit through the Department of Public Health and Environment prior to submitting this application. If a new septic system will be installed please state "a new septic system is proposed". Only propose portable toilets if the use is consistent with the Department of Public Health and Environment's portable toiletpolicy. • 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. If storage or warehousing is proposed, what type of items will be stored? • No storage or warehousing is proposed. 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. 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. 6. If there will be washing of vehicles or equipment on site indicate how the wash water will be contained. Page 8 of 13 • Not applicable. No vehicle or other washing facilities are proposed. 7. If there will be floor drains indicate how the fluids will be contained. • Not applicable. No structures are proposed. a. 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. 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. 10. Provide a nuisance management plan if applicable. (e.g. dairies, feedlots, etc.) • Not applicable. No cows on site, just solar panels. 11. Additional information may be requested depending on type of land use requested. • Understood. 1.1.1.4 Building questions: Jose Gonzalez 970-353-6100 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. 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. 3. List the proposed use(s) of each structure. • Not applicable. No existing structures exist on site, and none are proposed for this development. Page 9of13 Supplemental Questions for Oak Leaf Solar XXVIII (Anderson) USR Application 8. Provide written responses to the following supplemental questions for solar arrays: A. 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, 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. a. Not Applicable. Per the USDA Web Survey Map the land within the project boundaries is situated in a land classification of 4 for non -irrigated crop land farming, which implies "[these] soils have very severe limitations that reduce the choice of plants or that require very careful management, or both" and therefore land classification shall not be used as a consideration for approval or denial and does not apply as this land is not "Prime Agriculture" land. Warning: Soil Ratings Map may not be valid at this scale. cables — fonlrrrigated Capability Clan — Summary By Map Unit Summary by Map Unit — Weld County, Colorado,,. Southern Part (COGI ) Summary by Map Unit — Weld Counts. Colorado; Southern Part (CO518) Map unit symbol 44 Mapunit name Olney loamy sand, 1. to 3 percent slopes 72 Vona loamy sand, 0 to 3 percent slopes 4 Totals for Area of Interest Rating Acres in AOI 4 34.3 25.9 6O.2 Percent of AOI 57.0% 43.0% 100.0% B. A Decommissioning Plan. Adequate financial assurance to cover the decommissioning of the facility may be required as a condition of approval Page 10 of 13 of the Decommissioning Plan. a. See attached UP Decommissioning plan. C. 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. a. The landscape design for this development will match the surrounding industrial areas. The fence shall be an 8' CPW preferred wire fence with a smooth wire on top. Due to the land classification of 4 there are very little visible trees and predominately populated with sage brush and sparse dryland grasses. The surrounding neighboring properties consist of primarily oil and gas facilities, farming, and vacant dryland. large industrial uses, such as Due to the industrial feel of the area limited residential dwellings exist. Because of the feel of the area and poor soils, the vegetation being proposed will be dryland grass. b. 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 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. 0. 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. a. 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. E. The nature and location or expansion of the facility will not unreasonably interfere with any irrigation systems on or adjacent to the solar facility. a. Not applicable. The land to be developed is non -irrigated dryland ground. There are no irrigation lines or ditches on -site that need to be maintained. Page 11 of 13 F. 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. a. 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. G. 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. 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 property with native, low growth grasses to prevent shading of the array and minimize maintenance. b. Mowing and trimming operations will occur annually, or as needed to prevent the site from looking unmaintained. Page 12 of 13 i eal ENERGY PARTNERS Oak Leaf Energy Partners 2645 E 2nd Avenue, Suite 206 Denver, CO 80206 Telephone: 303-893-6945 Mobile: 720-496-4342 Westwood Drainage Report for the Anderson Solar Garden County of Weld, Colorado Prepared for: Oak Leaf Energy Partners 2645 E. 2nd Avenue, Suite 206 Denver, CO 80206 PROJECT NUMBER: 0011139.12 DATE: 1/3/2018 Prepared by: Westwood Professional Services 7699 Anagram Drive Eden Prairie, MN 55344 CONTENTS PROJECT SITE 2 GENERAL DESCRIPTION OF PROJECT .2 DRAINAGE DESIGN 2 DETENTION POND EXEMPTION REQUEST.. 2 ADJACENT AREAS 2 SOILS 3 METHODOLOGIES USED FOR DRAINAGE REPORT & ANALYSIS . 3 TIMING/PHASING SCHEDULE 3 BMP Installation, Inspection, and Removal .3 PERMANENT STABILIZATION 3 STORM WATER MANAGEMENT 3 ATTACHMENTS Attachment 1: Anderson Solar Garden Site Plan Attachment 2: Hydro AD Report Grading, Erosion, and Sediment Control Report I Anderson Solar Garden PROJECT SITE This Drainage Report has been prepared on behalf of Oak Leaf Energy Partners for the proposed construction of the Anderson Solar Garden in Weld County, Colorado hereinafter referred to as the project. The proposed development is locatedin the southeast quarter of Section 9, T3N, R66W of the 6th prime meridian. The project area is approximately 12.3 acres. The project is located east of County Road 29, west of County Road 31, north of County Road 34, and south of County Road 36. The proposed project is located in Northwest of Section 6, T3S, R66W, and County of Weld, Colorado. The site is 2.8 miles northeast of Platteville, CO and is covered with agricultural row crops. The ground surface slopes to the west-southwest at an average slope of approximately 0.5%. 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 OF PROJECT The proposed project will consist of a 2000kW DC solar array. The solar farm will consist of the solar array along with associated electrical equipment and a gravel access road. The solar panels will be mounted on posts and stand 4 feet above ground. See Site Plan in Attachment 1. 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 which is approximately 8,000 square feet. Given this, a waiver is requested to waive the detention pond requirement and allow runoff to sheet flow as it does in existing conditions. Historically stonnwater runs to the west-southwest toward the irrigation ditch. When the site is fully vegetated after construction, stormwater will flow off the solar panels, onto the ground, and run through the grass. The soils, in hydrologic soil group B, are conducive to infiltration. The grass will slow runoff and encourage infiltration. DETENTION POND EXEMPTION REQUEST A waiver is requested under Weld County Code Section 23-12-30.F.1.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 HydroCAD model, the proposed discharge rate in such an event is 2.5 cfs (Attachment 2). 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 detain the volume of runoff from a 1 -hour, 100 -year storm (approximately 9,000 cubic feet) and limit the discharge to the existing 1 -hour, 10 -year storm. See Weld County Code Section 23-12- 30.D. ADJACENT AREAS A drainage ditch abuts the project site along the southern boundary. There is no off -site run-off that flows onto the project site. Grading, Erosion, and Sediment Control Report 2 Anderson Solar Garden SOILS The soils for this project site are classified as hydrologic soil group B. The soil types found in the project site area are Olney loamy sand, 1 to 3 percent slopes. This soil information is based on the Natural Resources Conservation Service (MRCS) National Cooperative Soil Survey. The curve number in the HydroCAD model is lower in proposed conditions than in existing conditions. The meadow grasses 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. 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 13.1 As per the USDCM Manual, permanent seeding involves the loosening of soil, applying topsoil, drill seeding the disturbed areas to a depth not less than 1/Cinch and not more than 3/4 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 prairie land to the vegetated cover under the panels, a decrease in runoff rates is expected for the proposed conditions when compared to existing conditions. 1 http://udfcd.orgr'w -content/uploadsluploads/vol2%20criteria°lo20rnanual/ 13_Revegetation. pdf Grading, Erosion, and Sediment Control Report 3 Anderson Solar Garden 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. Grading, Erosion, and Sediment Control Report 4 Anderson Solar Garden 02D17 Westwood Prore�slonal Serrlera, Inc. LEGEND NOTES FOY A' x mph A.PPRO)7MATE LCCAIICN OF FWP''QEED SOLAR ARRAY EXISING PROPERTY LINE PROPO;;=D PROEM LNE ;ACTION LINE DISTNG MAJOR CONTOUR DOSING FAVOR CONICR DOSING EA MENT USING DVERNEAD POWER EXISTNG CANAL C£NTERIJhE EXISTNG ACCEE5 ROAD PftQPOS=O FENCE PROPOID ACCESS ROAD PARKING/CONSTRICTION LATDXWN YARD DRAINAGE FLOW ARROW ANDERSON SOLAR GARDEN 1, Tsa AC (2 I1rtvv-DC) SOLAR ARRAY PROJECT A PORTION OF THE SOUTHEAST 1/4 OF SECTION 9, TOWNSHIP 3 NORTH, RANGE 56 WEST OF THE 6TH P.M. COUNTY OF WELD, STATE OF COLORADO USE BY SPECIAL REVIEW USR27-;{ XXX 1. SITE DOES NOT UTILIZE LIGHTING EXISTING OR PROPOSED. 2. SITE IS FEMA ZONE X. (NO SPECIAL FLOOD HAZARD AREAS) ACCORDING TO MAP 08123C1910E EFFECTIVE O1/26/2D16 PRDPi:SED STE Pf_=F5S ixurrr F:OAD 36- ,r E):N11NC; AC?C£' TO RE}APIN I nay i I i I_ 4 ray nay 1."k TEAM 'Q' •,♦' ' - tai --ill*7-y.flo__ ,. 41 PcW Pete .40d `— — • _ Par PU. ti. � eq qa f11111;C:- !):14141PEZEITIPC44E1I S p D 0 tg 0 .k PR:CeCeEU ACeESS ROPL1 11011 (9O MEN US) NN nmnmmon RIFLED IN ihrc_�NINECT'N 1 4 PAREPPFh,IP.G 8A . LAffCIC1t1 n } D ❑ reee � �..�3� •-e , +.snir r .n , /s C a AtirmiTt.: J' 1r!'Sf: , Pat h \ 1 CLE/ECOIPL£NT WASH PREP. ,CYd,• W .,cw 7,5" 1116717 —Of —WAY GRANT KENR—AILY3EE C?ATh1 R/NG L1C ,/ RECEP77•ON pet 4749 : 11Ni; 14' paw PCS /17 ..iitirnajaai � {I Coll 48Hours before digging! 811 or cdll811.aom Common Ground Alliance Nme 1. EI 1142'R RAY MY RAO III ME s1IEC1W LC FOBS w TPIri. TRk?ER Pinta BRUTE WEIS TNmB x COPIER, TERMINAL OR RILL POST X BAREEIrvtRE APRON ON EXTENSION .ERNS x —x GRADE 4E TENON CCIIFANY EFECF:'d1TIONISi FOR WAY s'PQN7 STRUCTURAL SASE NOTE: 1. FENCE AND GATE T.FE TD BE APRS:2,EO BM OWNER FA 10R TO CONNTSUCTEON 2. STPJIGTJPAL CE`SitI TO BE PR04ffi BY FENIE SLPPUER S. DINENS214$ NIP t4RWM4TIOF1 S1QM1 ADM ARE FCft F•fFEREIICE OtLT. &CAI& DI£NSIONS ANJ RFORHKWI4 TD BE FRCO'dPED BY NANUFAGruFWauPPLet *l N-Ut4 6ECtWW FENCE DET7JL Ulf re wn►sa perm =vizi FWJ1 NOT FOR CONSTRUCTION ~wood 'Ions (2'41794O 274D till Osll:.. Ra,Iway,&iii 760 T.9 Roe INNEI 967.6150 HAW.. TX TER')a w.doadp•Xa VAINROpd Pv«SC ili Rif *MI 01c Irks apse richt Mum Bawd rte. isr/S Cid JNE PCP leaf 80206 SO Eget 2n4 Maaaa et a 246 Anderson Solar Garden Well County, CO pHs 1/3/2013 mme 2 oil 3 III 39_i34_12—USR01.0TB Use By Special Review Site Plan Routing Diagram for 0011139-12 Anderson 171221 Prepared by Westwood Professional Services, Inc., Printed 1/3/2018 HydroCA i G 10.00-19 sin 03363 la 2016 HydroCAD Software Solutions LLC 0011130-12 Anderson 171221 Colorado 1 -hr 100-yr 1 -hr 100 -year Rainfall=2.72" Prepared by Westwood Professional Services, Inc. Printed 1/3/2018 HydroCAD® 10.00-19 sin 03363 © 2016 HydroCAD Software Solutions LLC Runoff Summary for Subcatchment I S: Proposed Solar Site 2.45 cfs 1.25 hrs, Volume- 0.198 af, Depth= 0.21" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-10.00 hrs, dt= 0.05 hrs Colorado 1 -hr 100-yr 1 -hr 100 -year Rainfall=2.72" Area (sf) CN Description 477,066 58 Meadow, non -grazed, HSG B 8,102 98 Gravel Road Page 2 485,168 477,066 8,102 Tc Length (min) (feet) 59 Weighted Average 98.33% Pervious Area 1.67% Impervious Area Slope Velocity Capacity Description (ft/ft) (ft/sec) (cfs) 58.6 1,175 0.0120 0.33 Lag/CN Method, Runoff Summary for Subcatchment 3S: Existing Site 6.96 cfs @ 1.01 hrs, Volume 0.488 af, Depth= 0.53" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-10.00 hrs, dt= 0.05 hrs Colorado 1 -hr 100-yr 1 -hr 100 -year Rainfall=2.72" Area (sf) CN Description 477,066 69 Weighted Average 8,102 98 Gravel Road 485,168 477,066 8,102 Tc Length min feet) 69 Weighted Average 98.33% Pervious Area 1.67% Impervious Area Slope Velocity Capacity Description (ft/ftftlsec N (cfs) 45.2 1,175 0.0120 0.43 Lag/CN Method, Anderson Solar- Oak Leaf Solar XXVIII LLC 1 Introduction As a condition of approval of the Use By Special Review, Weld County required Oak Leaf Solar XXVIII to submit a Decommissioning Plan for the Anderson Solar Facility to the Department of Planning Services for review and approval. The Decommissioning Plan is required to include a detailed plan with time frames or milestones after termination 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 Solar XXVIII 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 usefull life of the project 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 project. It will be necessary to update and finalize this demolition and reclamation plan. In addition to the detailed plan, a general schedule for the performance of the decommissioning with specific milestones is provided. 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 Project Elements and Milestones The key tasks of the project are divided into related activities that represent milestones in the process. We describe the activies in each of the tasks in more detail below. The decommissioning schedule presents the conceptual timing of the milestones and overall process. The key Project 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 Project 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 Project or the entire Project 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; Paget of6 Anderson Solar- Oak Leaf Solar XXVIII LLC • Set up and document a site -specific health and safety plan and determine the specific sequence and procedures to be followed, • Complete an analysis of the project 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 project 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 Solar XXVIII 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, Project 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. Page 3 of 6 Anderson Solar- Oak Leaf Solar XXVIII LLC 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. 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 Project'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 Project site perimeter fencing will be removed at the end of the decommissioning project, unless it may be utilized for future use of the site. Since the project site was not originally fenced, this includes removal of all posts, fencing material, gates etc. to return the site to pre -project 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. Page 4 of 6 Anderson Solar- Oak Leaf Solar XXVIII LLC 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 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-established to prevent the spread of weeds and long-term monitoring 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. Project Quality Control and Documentation During the entire decommissioning process, from planning to site monitoring, the project will be subject to quality control and documentation. Oak Leaf Solar XXVIII will ensure the effective execution of the decommissioning and reclamation plan through project oversight and quality assurance. In addition, we will document implementation of the plan and compliance with all applicable regulatory and environmental requirement. Page 5of6 oak I eal ENERGY PARTNERS Oak Leaf Energy Partners 2645 E. 2nd Avenue, Suite 206 Denver, CO 80206 Telephone: 303-893-6945 Mobile: 720-496-4342 Solar made simple, backed by your community. oak leaf ENERGY PARTNERS What is a community solar garden? A community solar garden is an evolution in solar - the simplest and lowest risk means of deploying renewables and saving money. The solar garden is built in an optimal location and Xcel customers "subscribe" to the output of the system, thereby generating a credit on their bill. With no upfront cost or hidden fees, participating in a community solar garden is a straightforward way to save money and advance sustainability initiatives. Save Money Past Colorado Clients: Solar energy delivered from the Oak Leaf solar garden 6I1XceiEnergy Subscription payments to Oak Leaf Bill Credits on your Xcel Energy bill Why Participate? Advance sustainability About: No upfront cost No panels on site No asset management Oak Leaf Energy Partners, founded in 2005, is among the top 15 development companies in the US Solar Market. Our proven subscription, engineering and financial models provide our customers with turnkey implementation solutions for distributed generation, community solar and utility scale PV. We have been awarded more projects through Xcel's Solar Rewards program than any firm in the country, and work primarily with municipalities, school districts, hospitals and other institutions. Contact us: DEN Aillehl3/46, ft% IMI S1A1' UNIN1 iuz n CIS .fi.r11Ali* rim SINN Cltyof Fort Coilins Oak Leaf Energy Partners 2645 E. 2nd Ave, Suite 206 Denver, CO 80206 720-739-7413 Notice of Inquiry Development within a Coordinated Planning Agreement or Intergovernmental Agreement (CPA or iGA) Boundary Date of Inquiry 11/17/2017 Municipality with CPA or IGA Platteville CPA Name of Person Inquiring Oak Leaf EP Property Owner Charles Anderson Planner Angela Snyder asnyder@weldgov.com Legal Description 5E4 9-3-66 EXC N300' & E225' ALSO EXC UPRR RES Parcel Number 121109400016 Nearest Intersection CR 34 & CR 31 (access from CR 36) Type of Inquiry USR Small Solar Facility The above person inquired about developing a property inside your designated CPA or IGA boundary. This person has been referred to community by Weld County Planning to discuss development options on this site. Visit Chapter 19 of the Weld County Code for specifics on your agreement. Weld County Comments �Jr J L Name/Title of Municipality Representative —1:01A-VI Municipality Comments 7D v( LIcalki) . .z -e &A - Gtis r Gr�I . r, l I Signature f Weld County Planner r! 5ighaeure of Municipality Representative Plase return the signed form to: Weld County Planning Department 1555 N 17th Avenue, Greeley, CO 80631 (970) 353-6100 x3540 — (970)304-6498 fax Hello