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AES Digitial supplemental application material
AES Eagle Springs Organic Solar, LLC Land Use Change - Major Impact Permit Application Garfield County - April 6, 2023 AES provides better ways to accelerate a greener, smarter future of energy. 4300 Cherry Creek Drive South, Denver, CO 80246 303-692-3500 www.colorado.gov/cdphe/wqcd CERTIFICATION TO DISCHARGE UNDER CDPS GENERAL PERMIT COR400000 STORMWATER ASSOCIATED WITH CONSTRUCTION ACTIVITIES Certification Number: COR419991 This Certification to Discharge specifically authorizes: Owner AES Clean Energy Operator AES Clean Energy to discharge stormwater from the facility identified as Eagle Springs Organic Solar, LLC To the waters of the State of Colorado, including, but not limited to: Last Chance Ditch, Colorado River Facility Activity : other Solar Generation Facility Disturbed Acres: 78.4 acres Facility Located at: CO Rd 346 and Mamm Creek Road, Silt, CO 81652 Garfield County Latitude 39.5225 Longitude -107.6953 Specific Information (if applicable): Certification is issued and effective: 04/12/2023 Expiration date of general permit: 3/31/2024 This certification under the permit requires that specific actions be performed at designated times. The certification holder is legally obligated to comply with all terms and conditions of the permit. This certification was approved by: Randi Johnson-Hufford, Permits Unit 1 Manager Permits Section Water Quality Control Division FORGESOLAR GLARE ANALYSIS Glare Policy Adherence The following table estimates the policy adherence of this glare analysis according to the 2021 U.S. Federal Aviation Administration Policy: Review of Solar Energy System Projects on Federally-Obligated Airports This policy may require the following criteria be met for solar energy systems on airport property: • No glare of any kind for Air Traffic Control Tower(s) ("ATCT") at cab height. • Default analysis and observer characteristics, including 1-minute time step. ForgeSolar is not affiliated with the U.S. FAA and does not represent or speak officially for the U.S. FAA. ForgeSolar cannot approve or deny projects - results are informational only. Contact the relevant airport and FAA district office for information on policy and requirements. COMPONENT STATUS DESCRIPTION Analysis parameters PASS Analysis time interval and eye characteristics used are acceptable ATCT(s) N/A No ATCT receptors assessed The referenced policy can be read at https://www.federalregister.gov/d/2021-09862 Project: Eagle Springs Organic Site configuration: 10MWac Created 20 Feb, 2023 Updated 27 Jun, 2023 Time-step 1 minute Timezone offset UTC-7 Minimum sun altitude 0.0 deg DNI peaks at 1,000.0 W/m Site ID 84753.14968 Ocular transmission coefficient 0.5 Pupil diameter 0.002 m Eye focal length 0.017 m Sun subtended angle 9.3 mrad PV analysis methodology V2 2 Page 1 of 5 Component Data This report includes results for PV arrays and Observation Point ("OP") receptors marked as ATCTs. Components that are not pertinent to the policy, such as routes, flight paths, and vertical surfaces, are excluded. PV Arrays Name: PV array 1 Axis tracking: Single-axis rotation Backtracking: Shade-slope Tracking axis orientation: 180.0° Max tracking angle: 55.0° Resting angle: 15.0° Ground Coverage Ratio: 0.45 Rated power: - Panel material: Smooth glass with AR coating Reflectivity: Vary with sun Slope error: correlate with material Vertex Latitude (°) Longitude (°)Ground elevation (ft) Height above ground (ft) Total elevation (ft) 1 39.525202 -107.695418 5627.14 5.00 5632.14 2 39.522281 -107.695246 5646.67 5.00 5651.67 3 39.522306 -107.697971 5628.65 5.00 5633.65 4 39.523249 -107.699806 5606.31 5.00 5611.31 5 39.524499 -107.699817 5601.50 5.00 5606.50 6 39.524731 -107.699634 5601.78 5.00 5606.78 7 39.524788 -107.698368 5612.97 5.00 5617.97 8 39.525153 -107.698390 5613.82 5.00 5618.82 Name: PV array 2 Axis tracking: Single-axis rotation Backtracking: Shade-slope Tracking axis orientation: 180.0° Max tracking angle: 55.0° Resting angle: 30.0° Ground Coverage Ratio: 0.45 Rated power: - Panel material: Smooth glass with AR coating Reflectivity: Vary with sun Slope error: correlate with material Vertex Latitude (°) Longitude (°)Ground elevation (ft) Height above ground (ft) Total elevation (ft) 1 39.526502 -107.699634 5589.87 5.00 5594.87 2 39.526526 -107.697199 5613.88 5.00 5618.88 3 39.526046 -107.697199 5615.25 5.00 5620.25 4 39.526063 -107.697499 5615.03 5.00 5620.03 5 39.525641 -107.697499 5616.38 5.00 5621.38 6 39.525649 -107.698561 5611.66 5.00 5616.66 7 39.526046 -107.698572 5605.29 5.00 5610.29 8 39.526063 -107.699613 5591.14 5.00 5596.14 Page 2 of 5 Observation Point ATCT Receptors No ATCT receptors were included in the analysis. Name: PV array 3 Axis tracking: Single-axis rotation Backtracking: Shade-slope Tracking axis orientation: 180.0° Max tracking angle: 55.0° Resting angle: 30.0° Ground Coverage Ratio: 0.45 Rated power: - Panel material: Smooth glass with AR coating Reflectivity: Vary with sun Slope error: correlate with material Vertex Latitude (°) Longitude (°)Ground elevation (ft) Height above ground (ft) Total elevation (ft) 1 39.528759 -107.695999 5600.46 5.00 5605.46 2 39.528461 -107.695517 5610.92 5.00 5615.92 3 39.526996 -107.695506 5614.76 5.00 5619.76 4 39.526980 -107.696536 5610.15 5.00 5615.15 5 39.527344 -107.696568 5607.55 5.00 5612.55 6 39.527319 -107.696954 5604.60 5.00 5609.60 7 39.527021 -107.696944 5608.51 5.00 5613.51 8 39.526963 -107.699336 5588.31 5.00 5593.31 9 39.527394 -107.699347 5586.74 5.00 5591.74 10 39.527385 -107.699873 5582.84 5.00 5587.84 11 39.527013 -107.699894 5585.80 5.00 5590.80 12 39.526980 -107.701203 5570.93 5.00 5575.93 13 39.527981 -107.701235 5572.74 5.00 5577.74 14 39.528602 -107.700967 5573.48 5.00 5578.48 15 39.528610 -107.700549 5574.59 5.00 5579.59 16 39.527865 -107.700527 5577.78 5.00 5582.78 17 39.527725 -107.700248 5580.03 5.00 5585.03 18 39.527758 -107.698971 5587.39 5.00 5592.39 19 39.528585 -107.698703 5583.47 5.00 5588.47 20 39.528718 -107.698242 5585.17 5.00 5590.17 Page 3 of 5 Glare Analysis Results Summary of Results No glare predicted PV Array Tilt Orient Annual Green Glare Annual Yellow Glare Energy ° ° min hr min hr kWh PV array 1 SA tracking SA tracking 0 0.0 0 0.0 - PV array 2 SA tracking SA tracking 0 0.0 0 0.0 - PV array 3 SA tracking SA tracking 0 0.0 0 0.0 - No ATCT receptors were included in the analysis. PV: PV array 1 No ATCT receptors assessed. PV: PV array 2 No ATCT receptors assessed. PV: PV array 3 No ATCT receptors assessed. Page 4 of 5 Assumptions Default glare analysis parameters and observer eye characteristics (for reference only): • Analysis time interval: 1 minute • Ocular transmission coefficient: 0.5 • Pupil diameter: 0.002 meters • Eye focal length: 0.017 meters • Sun subtended angle: 9.3 milliradians 2016 © Sims Industries d/b/a ForgeSolar, All Rights Reserved. "Green" glare is glare with low potential to cause an after-image (flash blindness) when observed prior to a typical blink response time. "Yellow" glare is glare with potential to cause an after-image (flash blindness) when observed prior to a typical blink response time. Times associated with glare are denoted in Standard time. For Daylight Savings, add one hour. The algorithm does not rigorously represent the detailed geometry of a system; detailed features such as gaps between modules, variable height of the PV array, and support structures may impact actual glare results. However, we have validated our models against several systems, including a PV array causing glare to the air-traffic control tower at Manchester-Boston Regional Airport and several sites in Albuquerque, and the tool accurately predicted the occurrence and intensity of glare at different times and days of the year. Several V1 calculations utilize the PV array centroid, rather than the actual glare spot location, due to algorithm limitations. This may affect results for large PV footprints. Additional analyses of array sub-sections can provide additional information on expected glare. This primarily affects V1 analyses of path receptors. Random number computations are utilized by various steps of the annual hazard analysis algorithm. Predicted minutes of glare can vary between runs as a result. This limitation primarily affects analyses of Observation Point receptors, including ATCTs. Note that the SGHAT/ ForgeSolar methodology has always relied on an analytical, qualitative approach to accurately determine the overall hazard (i.e. green vs. yellow) of expected glare on an annual basis. The analysis does not automatically consider obstacles (either man-made or natural) between the observation points and the prescribed solar installation that may obstruct observed glare, such as trees, hills, buildings, etc. The subtended source angle (glare spot size) is constrained by the PV array footprint size. Partitioning large arrays into smaller sections will reduce the maximum potential subtended angle, potentially impacting results if actual glare spots are larger than the sub-array size. Additional analyses of the combined area of adjacent sub-arrays can provide more information on potential glare hazards. (See previous point on related limitations.) The variable direct normal irradiance (DNI) feature (if selected) scales the user-prescribed peak DNI using a typical clear-day irradiance profile. This profile has a lower DNI in the mornings and evenings and a maximum at solar noon. The scaling uses a clear-day irradiance profile based on a normalized time relative to sunrise, solar noon, and sunset, which are prescribed by a sun-position algorithm and the latitude and longitude obtained from Google maps. The actual DNI on any given day can be affected by cloud cover, atmospheric attenuation, and other environmental factors. The ocular hazard predicted by the tool depends on a number of environmental, optical, and human factors, which can be uncertain. We provide input fields and typical ranges of values for these factors so that the user can vary these parameters to see if they have an impact on the results. The speed of SGHAT allows expedited sensitivity and parametric analyses. The system output calculation is a DNI-based approximation that assumes clear, sunny skies year-round. It should not be used in place of more rigorous modeling methods. Hazard zone boundaries shown in the Glare Hazard plot are an approximation and visual aid based on aggregated research data. Actual ocular impact outcomes encompass a continuous, not discrete, spectrum. Glare locations displayed on receptor plots are approximate. Actual glare-spot locations may differ. Refer to the Help page at www.forgesolar.com/help/ for assumptions and limitations not listed here. Page 5 of 5 6/27/23, 1:23 PM 10MWac-temp-1 Site Config | ForgeSolar https://forgesolar.com/projects/14968/configs/94073/1/13 Misc. Analysis Settings Summary of Results Glare with low potential for temporary after-image predicted PV Name Tilt Orientation "Green" Glare "Yellow" Glare Energy Produced deg deg min min kWh PV array 1 SA tracking SA tracking 0 0 - PV array 2 SA tracking SA tracking 4,820 0 - PV array 3 SA tracking SA tracking 3,802 0 - Eagle Springs Organic 10MWac-temp-1 Created Jun 27, 2023 Updated Jun 27, 2023 Time-step 1 minute Timezone offset UTC-7 Minimum sun altitude 0.0 deg Site ID 94073.14968 Project type Advanced Project status: active Category 5 MW to 10 MW DNI: varies (1,000.0 W/m^2 peak) Ocular transmission coefficient: 0.5 Pupil diameter: 0.002 m Eye focal length: 0.017 m Sun subtended angle: 9.3 mrad PV Analysis Methodology: Version 2 Enhanced subtended angle calculation: On ForgeSolar 6/27/23, 1:23 PM 10MWac-temp-1 Site Config | ForgeSolar https://forgesolar.com/projects/14968/configs/94073/2/13 Component Data 6/27/23, 1:23 PM 10MWac-temp-1 Site Config | ForgeSolar https://forgesolar.com/projects/14968/configs/94073/3/13 PV Array(s) Total PV footprint area: 48.5 acres Name: PV array 1 Footprint area: 26.9 acres Axis tracking: Single-axis rotation Backtracking: Shade-slope Tracking axis orientation: 180.0 deg Maximum tracking angle: 55.0 deg Resting angle: 15.0 deg Ground Coverage Ratio: 0.45 Rated power: - Panel material: Smooth glass with AR coating Vary reflectivity with sun position? Yes Correlate slope error with surface type? Yes Slope error: 8.43 mrad Vertex Latitude Longitude Ground elevation Height above ground Total elevation deg deg ft ft ft 1 39.525202 -107.695418 5627.14 5.00 5632.14 2 39.522281 -107.695246 5646.67 5.00 5651.67 3 39.522306 -107.697971 5628.65 5.00 5633.65 4 39.523249 -107.699806 5606.31 5.00 5611.31 5 39.524499 -107.699817 5601.50 5.00 5606.50 6 39.524731 -107.699634 5601.78 5.00 5606.78 7 39.524788 -107.698368 5612.97 5.00 5617.97 8 39.525153 -107.698390 5613.82 5.00 5618.82 Name: PV array 2 Footprint area: 3.6 acres Axis tracking: Single-axis rotation Backtracking: Shade-slope Tracking axis orientation: 180.0 deg Maximum tracking angle: 55.0 deg Resting angle: 30.0 deg Ground Coverage Ratio: 0.45 Rated power: - Panel material: Smooth glass with AR coating Vary reflectivity with sun position? Yes Correlate slope error with surface type? Yes Slope error: 8.43 mrad Vertex Latitude Longitude Ground elevation Height above ground Total elevation deg deg ft ft ft 1 39.526502 -107.699634 5589.87 5.00 5594.87 2 39.526526 -107.697199 5613.88 5.00 5618.88 3 39.526046 -107.697199 5615.25 5.00 5620.25 4 39.526063 -107.697499 5615.03 5.00 5620.03 5 39.525641 -107.697499 5616.38 5.00 5621.38 6 39.525649 -107.698561 5611.66 5.00 5616.66 7 39.526046 -107.698572 5605.29 5.00 5610.29 8 39.526063 -107.699613 5591.14 5.00 5596.14 6/27/23, 1:23 PM 10MWac-temp-1 Site Config | ForgeSolar https://forgesolar.com/projects/14968/configs/94073/4/13 2-Mile Flight Path Receptor(s) Name: PV array 3 Footprint area: 18.0 acres Axis tracking: Single-axis rotation Backtracking: Shade-slope Tracking axis orientation: 180.0 deg Maximum tracking angle: 55.0 deg Resting angle: 30.0 deg Ground Coverage Ratio: 0.45 Rated power: - Panel material: Smooth glass with AR coating Vary reflectivity with sun position? Yes Correlate slope error with surface type? Yes Slope error: 8.43 mrad Vertex Latitude Longitude Ground elevation Height above ground Total elevation deg deg ft ft ft 1 39.528759 -107.695999 5600.46 5.00 5605.46 2 39.528461 -107.695517 5610.92 5.00 5615.92 3 39.526996 -107.695506 5614.76 5.00 5619.76 4 39.526980 -107.696536 5610.15 5.00 5615.15 5 39.527344 -107.696568 5607.55 5.00 5612.55 6 39.527319 -107.696954 5604.60 5.00 5609.60 7 39.527021 -107.696944 5608.51 5.00 5613.51 8 39.526963 -107.699336 5588.31 5.00 5593.31 9 39.527394 -107.699347 5586.74 5.00 5591.74 10 39.527385 -107.699873 5582.84 5.00 5587.84 11 39.527013 -107.699894 5585.80 5.00 5590.80 12 39.526980 -107.701203 5570.93 5.00 5575.93 13 39.527981 -107.701235 5572.74 5.00 5577.74 14 39.528602 -107.700967 5573.48 5.00 5578.48 15 39.528610 -107.700549 5574.59 5.00 5579.59 16 39.527865 -107.700527 5577.78 5.00 5582.78 17 39.527725 -107.700248 5580.03 5.00 5585.03 18 39.527758 -107.698971 5587.39 5.00 5592.39 19 39.528585 -107.698703 5583.47 5.00 5588.47 20 39.528718 -107.698242 5585.17 5.00 5590.17 Name: FP 1 Description: Threshold height : 50 ft Direction: 267.7 deg Glide slope: 3.0 deg Pilot view restricted? Yes Vertical view restriction: 30.0 deg Azimuthal view restriction: 50.0 deg Point Latitude Longitude Ground elevation Height above ground Total elevation deg deg ft ft ft Threshold 39.526848 -107.715871 5531.41 50.00 5581.41 2-mile point 39.527994 -107.678372 5665.75 469.09 6134.84 Name: FP 2 Description: Threshold height : 50 ft Direction: 89.2 deg Glide slope: 3.0 deg Pilot view restricted? Yes Vertical view restriction: 30.0 deg Azimuthal view restriction: 50.0 deg Point Latitude Longitude Ground elevation Height above ground Total elevation deg deg ft ft ft Threshold 39.526352 -107.740161 5465.58 50.00 5515.58 2-mile point 39.525953 -107.777685 5302.93 766.07 6069.00 6/27/23, 1:23 PM 10MWac-temp-1 Site Config | ForgeSolar https://forgesolar.com/projects/14968/configs/94073/5/13 Route Receptor(s) Name: 346 Route type Two-way View angle: 50.0 deg Vertex Latitude Longitude Ground elevation Height above ground Total elevation deg deg ft ft ft 1 39.530219 -107.687230 5440.63 5.00 5445.63 2 39.530240 -107.686678 5441.90 5.00 5446.90 3 39.530286 -107.686329 5440.39 5.00 5445.39 4 39.530906 -107.683153 5417.17 5.00 5422.17 5 39.531229 -107.681437 5418.57 5.00 5423.57 6 39.531308 -107.681329 5416.82 5.00 5421.82 7 39.531440 -107.681294 5414.13 5.00 5419.13 8 39.532133 -107.681302 5408.01 5.00 5413.01 Name: 346 Route type Two-way View angle: 50.0 deg Vertex Latitude Longitude Ground elevation Height above ground Total elevation deg deg ft ft ft 1 39.531082 -107.709611 5383.76 5.00 5388.76 2 39.531140 -107.710137 5385.88 5.00 5390.88 3 39.531132 -107.710571 5388.52 5.00 5393.52 4 39.531008 -107.711220 5385.92 5.00 5390.92 5 39.530983 -107.711564 5387.47 5.00 5392.47 6 39.530999 -107.712283 5392.31 5.00 5397.31 7 39.530932 -107.712559 5395.74 5.00 5400.74 8 39.530672 -107.712978 5397.32 5.00 5402.32 9 39.530339 -107.712977 5393.88 5.00 5398.88 10 39.529950 -107.712824 5393.91 5.00 5398.91 11 39.529454 -107.712266 5397.37 5.00 5402.37 12 39.528891 -107.711505 5403.44 5.00 5408.44 13 39.527972 -107.709928 5413.80 5.00 5418.80 14 39.527757 -107.709670 5412.29 5.00 5417.29 6/27/23, 1:23 PM 10MWac-temp-1 Site Config | ForgeSolar https://forgesolar.com/projects/14968/configs/94073/6/13 Name: 346 Route type Two-way View angle: 50.0 deg Vertex Latitude Longitude Ground elevation Height above ground Total elevation deg deg ft ft ft 1 39.531070 -107.709608 5383.90 5.00 5388.90 2 39.531144 -107.708776 5382.20 5.00 5387.20 3 39.531463 -107.707124 5380.06 5.00 5385.06 4 39.531504 -107.706630 5379.84 5.00 5384.84 5 39.531347 -107.705804 5383.38 5.00 5388.38 6 39.530904 -107.704780 5382.06 5.00 5387.06 7 39.530594 -107.703937 5382.67 5.00 5387.67 8 39.530325 -107.703455 5382.40 5.00 5387.40 9 39.530276 -107.703117 5384.78 5.00 5389.78 10 39.530296 -107.702725 5386.89 5.00 5391.89 11 39.530229 -107.701930 5395.65 5.00 5400.65 12 39.530241 -107.701463 5395.10 5.00 5400.10 13 39.530312 -107.700745 5395.72 5.00 5400.72 14 39.530295 -107.699918 5395.49 5.00 5400.49 15 39.530332 -107.699157 5398.90 5.00 5403.90 16 39.530481 -107.697043 5402.71 5.00 5407.71 17 39.530523 -107.695986 5410.63 5.00 5415.63 18 39.530473 -107.695482 5413.41 5.00 5418.41 19 39.530241 -107.694044 5417.09 5.00 5422.09 20 39.530183 -107.693660 5419.24 5.00 5424.24 21 39.530158 -107.693127 5417.33 5.00 5422.33 22 39.530208 -107.688937 5428.84 5.00 5433.84 23 39.530214 -107.688168 5434.00 0.00 5434.00 24 39.530214 -107.688168 5434.00 0.00 5434.00 25 39.530221 -107.687226 5440.63 5.00 5445.63 Name: Mamm Creek Rd Route type Two-way View angle: 50.0 deg Vertex Latitude Longitude Ground elevation Height above ground Total elevation deg deg ft ft ft 1 39.527757 -107.709664 5412.42 5.00 5417.42 2 39.526094 -107.707701 5421.80 5.00 5426.80 3 39.525713 -107.706929 5428.56 5.00 5433.56 4 39.525341 -107.706070 5434.65 5.00 5439.65 5 39.524999 -107.705637 5433.36 5.00 5438.36 6 39.523833 -107.704779 5448.09 5.00 5453.09 7 39.523439 -107.704489 5451.94 5.00 5456.94 8 39.523146 -107.704044 5457.88 5.00 5462.88 9 39.522935 -107.703438 5459.31 5.00 5464.31 10 39.522761 -107.702805 5462.89 5.00 5467.89 11 39.522422 -107.701935 5468.36 5.00 5473.36 12 39.521402 -107.699859 5472.67 5.00 5477.67 13 39.520847 -107.699017 5474.49 5.00 5479.49 14 39.520603 -107.698528 5474.58 5.00 5479.58 15 39.520058 -107.696407 5496.65 5.00 5501.65 16 39.519260 -107.694342 5503.30 5.00 5508.30 17 39.518324 -107.691981 5507.08 5.00 5512.08 18 39.517952 -107.691439 5509.31 5.00 5514.31 6/27/23, 1:23 PM 10MWac-temp-1 Site Config | ForgeSolar https://forgesolar.com/projects/14968/configs/94073/7/13 Discrete Observation Receptors Number Latitude Longitude Ground elevation Height above ground Total Elevation deg deg ft ft ft OP 1 39.527062 -107.704011 5565.20 5.00 5570.20 OP 2 39.530620 -107.701717 5385.72 5.00 5390.72 OP 3 39.530618 -107.694772 5405.68 5.00 5410.68 OP 4 39.530762 -107.695651 5402.95 5.00 5407.95 OP 5 39.530452 -107.693759 5412.29 5.00 5417.29 OP 6 39.529086 -107.681468 5638.19 5.00 5643.19 OP 7 39.525633 -107.676241 5703.50 5.00 5708.50 OP 8 39.514502 -107.686839 5680.92 5.00 5685.92 OP 9 39.511917 -107.687227 5672.48 5.00 5677.48 OP 10 39.510943 -107.672478 5787.57 5.00 5792.57 Name: Mamm Creek Rd Route type Two-way View angle: 50.0 deg Vertex Latitude Longitude Ground elevation Height above ground Total elevation deg deg ft ft ft 1 39.517955 -107.691445 5509.21 5.00 5514.21 2 39.517545 -107.691177 5511.34 5.00 5516.34 3 39.515526 -107.690244 5516.01 5.00 5521.01 4 39.514192 -107.689590 5524.01 5.00 5529.01 5 39.513579 -107.689505 5524.69 5.00 5529.69 6 39.512859 -107.689687 5521.01 5.00 5526.01 7 39.512379 -107.689869 5522.34 5.00 5527.34 8 39.511618 -107.689805 5531.90 5.00 5536.90 9 39.510914 -107.689505 5540.39 5.00 5545.39 6/27/23, 1:23 PM 10MWac-temp-1 Site Config | ForgeSolar https://forgesolar.com/projects/14968/configs/94073/8/13 Summary of PV Glare Analysis PV configuration and total predicted glare PV Name Tilt Orientation "Green" Glare "Yellow" Glare Energy Produced Data File deg deg min min kWh PV array 1 SA tracking SA tracking 0 0 -- PV array 2 SA tracking SA tracking 4,820 0 -- PV array 3 SA tracking SA tracking 3,802 0 -- Distinct glare per month Excludes overlapping glare from PV array for multiple receptors at matching time(s) PV Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec pv-array-2 (green)0 362 1976 80 0 0 0 0 1483 919 0 0 pv-array-2 (yellow)0 0 0 0 0 0 0 0 0 0 0 0 pv-array-3 (green)0 0 131 1025 490 369 422 779 586 0 0 0 pv-array-3 (yellow)0 0 0 0 0 0 0 0 0 0 0 0 PV & Receptor Analysis Results Results for each PV array and receptor PV array 1 no glare found Component Green glare (min)Yellow glare (min) FP: FP 1 0 0 FP: FP 2 0 0 OP: OP 1 0 0 OP: OP 2 0 0 OP: OP 3 0 0 OP: OP 4 0 0 OP: OP 5 0 0 OP: OP 6 0 0 OP: OP 7 0 0 OP: OP 8 0 0 OP: OP 9 0 0 OP: OP 10 0 0 Route: 346 0 0 Route: 346 0 0 Route: 346 0 0 Route: Mamm Creek Rd 0 0 Route: Mamm Creek Rd 0 0 No glare found 6/27/23, 1:23 PM 10MWac-temp-1 Site Config | ForgeSolar https://forgesolar.com/projects/14968/configs/94073/9/13 PV array 2 low potential for temporary after-image Component Green glare (min)Yellow glare (min) FP: FP 1 4820 0 FP: FP 2 0 0 OP: OP 1 0 0 OP: OP 2 0 0 OP: OP 3 0 0 OP: OP 4 0 0 OP: OP 5 0 0 OP: OP 6 0 0 OP: OP 7 0 0 OP: OP 8 0 0 OP: OP 9 0 0 OP: OP 10 0 0 Route: 346 0 0 Route: 346 0 0 Route: 346 0 0 Route: Mamm Creek Rd 0 0 Route: Mamm Creek Rd 0 0 PV array 2: FP 1 PV array is expected to produce the following glare for this receptor: 4,820 minutes of "green" glare with low potential to cause temporary after-image. 0 minutes of "yellow" glare with potential to cause temporary after-image. PV array 2: FP 2 No glare found 6/27/23, 1:23 PM 10MWac-temp-1 Site Config | ForgeSolar https://forgesolar.com/projects/14968/configs/94073/10/13 PV array 2: OP 1 No glare found PV array 2: OP 2 No glare found PV array 2: OP 3 No glare found PV array 2: OP 4 No glare found PV array 2: OP 5 No glare found PV array 2: OP 6 No glare found PV array 2: OP 7 No glare found PV array 2: OP 8 No glare found PV array 2: OP 9 No glare found PV array 2: OP 10 No glare found PV array 2: 346 No glare found PV array 2: 346 No glare found PV array 2: 346 No glare found PV array 2: Mamm Creek Rd No glare found PV array 2: Mamm Creek Rd No glare found 6/27/23, 1:23 PM 10MWac-temp-1 Site Config | ForgeSolar https://forgesolar.com/projects/14968/configs/94073/11/13 PV array 3 low potential for temporary after-image Component Green glare (min)Yellow glare (min) FP: FP 1 3802 0 FP: FP 2 0 0 OP: OP 1 0 0 OP: OP 2 0 0 OP: OP 3 0 0 OP: OP 4 0 0 OP: OP 5 0 0 OP: OP 6 0 0 OP: OP 7 0 0 OP: OP 8 0 0 OP: OP 9 0 0 OP: OP 10 0 0 Route: 346 0 0 Route: 346 0 0 Route: 346 0 0 Route: Mamm Creek Rd 0 0 Route: Mamm Creek Rd 0 0 PV array 3: FP 1 PV array is expected to produce the following glare for this receptor: 3,802 minutes of "green" glare with low potential to cause temporary after-image. 0 minutes of "yellow" glare with potential to cause temporary after-image. PV array 3: FP 2 No glare found 6/27/23, 1:23 PM 10MWac-temp-1 Site Config | ForgeSolar https://forgesolar.com/projects/14968/configs/94073/12/13 PV array 3: OP 1 No glare found PV array 3: OP 2 No glare found PV array 3: OP 3 No glare found PV array 3: OP 4 No glare found PV array 3: OP 5 No glare found PV array 3: OP 6 No glare found PV array 3: OP 7 No glare found PV array 3: OP 8 No glare found PV array 3: OP 9 No glare found PV array 3: OP 10 No glare found PV array 3: 346 No glare found PV array 3: 346 No glare found PV array 3: 346 No glare found PV array 3: Mamm Creek Rd No glare found PV array 3: Mamm Creek Rd No glare found 6/27/23, 1:23 PM 10MWac-temp-1 Site Config | ForgeSolar https://forgesolar.com/projects/14968/configs/94073/13/13 Assumptions Times associated with glare are denoted in Standard time. For Daylight Savings, add one hour. Glare analyses do not automatically account for physical obstructions between reflectors and receptors. This includes buildings, tree cover and geographi obstructions. Detailed system geometry is not rigorously simulated. The glare hazard determination relies on several approximations including observer eye characteristics, angle of view, and typical blink response time. Actual values and results may vary. The system output calculation is a DNI-based approximation that assumes clear, sunny skies year-round. It should not be used in place of more rigorous modeling methods. Several V1 calculations utilize the PV array centroid, rather than the actual glare spot location, due to algorithm limitations. This may affect results for larg PV footprints. Additional analyses of array sub-sections can provide additional information on expected glare. The subtended source angle (glare spot size) is constrained by the PV array footprint size. Partitioning large arrays into smaller sections will reduce the maximum potential subtended angle, potentially impacting results if actual glare spots are larger than the sub-array size. Additional analyses of the combined area of adjacent sub-arrays can provide more information on potential glare hazards. (See previous point on related limitations.) Hazard zone boundaries shown in the Glare Hazard plot are an approximation and visual aid. Actual ocular impact outcomes encompass a continuous, no discrete, spectrum. Glare locations displayed on receptor plots are approximate. Actual glare-spot locations may differ. Refer to the Help page for detailed assumptions and limitations not listed here. FORGESOLAR GLARE ANALYSIS Summary of Results Glare with low potential for temporary after-image predicted PV Array Tilt Orient Annual Green Glare Annual Yellow Glare Energy ° ° min hr min hr kWh PV array 1 SA tracking SA tracking 0 0.0 0 0.0 - PV array 2 SA tracking SA tracking 4,820 80.3 0 0.0 - PV array 3 SA tracking SA tracking 3,802 63.4 0 0.0 - Total glare received by each receptor; may include duplicate times of glare from multiple reflective surfaces. Receptor Annual Green Glare Annual Yellow Glare min hr min hr 346 0 0.0 0 0.0 346 0 0.0 0 0.0 346 0 0.0 0 0.0 Mamm Creek Rd 0 0.0 0 0.0 Mamm Creek Rd 0 0.0 0 0.0 FP 1 8,622 143.7 0 0.0 FP 2 0 0.0 0 0.0 OP 1 0 0.0 0 0.0 OP 2 0 0.0 0 0.0 OP 3 0 0.0 0 0.0 OP 4 0 0.0 0 0.0 OP 5 0 0.0 0 0.0 Project: Eagle Springs Organic Site configuration: 10MWac Created 20 Feb, 2023 Updated 27 Jun, 2023 Time-step 1 minute Timezone offset UTC-7 Minimum sun altitude 0.0 deg DNI peaks at 1,000.0 W/m Category 5 MW to 10 MW Site ID 84753.14968 Ocular transmission coefficient 0.5 Pupil diameter 0.002 m Eye focal length 0.017 m Sun subtended angle 9.3 mrad PV analysis methodology V2 2 Page 1 of 19 Receptor Annual Green Glare Annual Yellow Glare min hr min hr OP 6 0 0.0 0 0.0 OP 7 0 0.0 0 0.0 OP 8 0 0.0 0 0.0 OP 9 0 0.0 0 0.0 OP 10 0 0.0 0 0.0 Page 2 of 19 Component Data PV Arrays Name: PV array 1 Axis tracking: Single-axis rotation Backtracking: Shade-slope Tracking axis orientation: 180.0° Max tracking angle: 55.0° Resting angle: 15.0° Ground Coverage Ratio: 0.45 Rated power: - Panel material: Smooth glass with AR coating Reflectivity: Vary with sun Slope error: correlate with material Vertex Latitude (°) Longitude (°)Ground elevation (ft) Height above ground (ft) Total elevation (ft) 1 39.525202 -107.695418 5627.14 5.00 5632.14 2 39.522281 -107.695246 5646.67 5.00 5651.67 3 39.522306 -107.697971 5628.65 5.00 5633.65 4 39.523249 -107.699806 5606.31 5.00 5611.31 5 39.524499 -107.699817 5601.50 5.00 5606.50 6 39.524731 -107.699634 5601.78 5.00 5606.78 7 39.524788 -107.698368 5612.97 5.00 5617.97 8 39.525153 -107.698390 5613.82 5.00 5618.82 Name: PV array 2 Axis tracking: Single-axis rotation Backtracking: Shade-slope Tracking axis orientation: 180.0° Max tracking angle: 55.0° Resting angle: 30.0° Ground Coverage Ratio: 0.45 Rated power: - Panel material: Smooth glass with AR coating Reflectivity: Vary with sun Slope error: correlate with material Vertex Latitude (°) Longitude (°)Ground elevation (ft) Height above ground (ft) Total elevation (ft) 1 39.526502 -107.699634 5589.87 5.00 5594.87 2 39.526526 -107.697199 5613.88 5.00 5618.88 3 39.526046 -107.697199 5615.25 5.00 5620.25 4 39.526063 -107.697499 5615.03 5.00 5620.03 5 39.525641 -107.697499 5616.38 5.00 5621.38 6 39.525649 -107.698561 5611.66 5.00 5616.66 7 39.526046 -107.698572 5605.29 5.00 5610.29 8 39.526063 -107.699613 5591.14 5.00 5596.14 Page 3 of 19 Name: PV array 3 Axis tracking: Single-axis rotation Backtracking: Shade-slope Tracking axis orientation: 180.0° Max tracking angle: 55.0° Resting angle: 30.0° Ground Coverage Ratio: 0.45 Rated power: - Panel material: Smooth glass with AR coating Reflectivity: Vary with sun Slope error: correlate with material Vertex Latitude (°) Longitude (°)Ground elevation (ft) Height above ground (ft) Total elevation (ft) 1 39.528759 -107.695999 5600.46 5.00 5605.46 2 39.528461 -107.695517 5610.92 5.00 5615.92 3 39.526996 -107.695506 5614.76 5.00 5619.76 4 39.526980 -107.696536 5610.15 5.00 5615.15 5 39.527344 -107.696568 5607.55 5.00 5612.55 6 39.527319 -107.696954 5604.60 5.00 5609.60 7 39.527021 -107.696944 5608.51 5.00 5613.51 8 39.526963 -107.699336 5588.31 5.00 5593.31 9 39.527394 -107.699347 5586.74 5.00 5591.74 10 39.527385 -107.699873 5582.84 5.00 5587.84 11 39.527013 -107.699894 5585.80 5.00 5590.80 12 39.526980 -107.701203 5570.93 5.00 5575.93 13 39.527981 -107.701235 5572.74 5.00 5577.74 14 39.528602 -107.700967 5573.48 5.00 5578.48 15 39.528610 -107.700549 5574.59 5.00 5579.59 16 39.527865 -107.700527 5577.78 5.00 5582.78 17 39.527725 -107.700248 5580.03 5.00 5585.03 18 39.527758 -107.698971 5587.39 5.00 5592.39 19 39.528585 -107.698703 5583.47 5.00 5588.47 20 39.528718 -107.698242 5585.17 5.00 5590.17 Page 4 of 19 Route Receptors Name: 346 Path type: Two-way Observer view angle: 50.0° Vertex Latitude (°) Longitude (°)Ground elevation (ft) Height above ground (ft) Total elevation (ft) 1 39.530219 -107.687230 5440.63 5.00 5445.63 2 39.530240 -107.686678 5441.90 5.00 5446.90 3 39.530286 -107.686329 5440.39 5.00 5445.39 4 39.530906 -107.683153 5417.17 5.00 5422.17 5 39.531229 -107.681437 5418.57 5.00 5423.57 6 39.531308 -107.681329 5416.82 5.00 5421.82 7 39.531440 -107.681294 5414.13 5.00 5419.13 8 39.532133 -107.681302 5408.01 5.00 5413.01 Page 5 of 19 Name: 346 Path type: Two-way Observer view angle: 50.0° Vertex Latitude (°) Longitude (°)Ground elevation (ft) Height above ground (ft) Total elevation (ft) 1 39.531070 -107.709608 5383.90 5.00 5388.90 2 39.531144 -107.708776 5382.20 5.00 5387.20 3 39.531463 -107.707124 5380.06 5.00 5385.06 4 39.531504 -107.706630 5379.84 5.00 5384.84 5 39.531347 -107.705804 5383.38 5.00 5388.38 6 39.530904 -107.704780 5382.06 5.00 5387.06 7 39.530594 -107.703937 5382.67 5.00 5387.67 8 39.530325 -107.703455 5382.40 5.00 5387.40 9 39.530276 -107.703117 5384.78 5.00 5389.78 10 39.530296 -107.702725 5386.89 5.00 5391.89 11 39.530229 -107.701930 5395.65 5.00 5400.65 12 39.530241 -107.701463 5395.10 5.00 5400.10 13 39.530312 -107.700745 5395.72 5.00 5400.72 14 39.530295 -107.699918 5395.49 5.00 5400.49 15 39.530332 -107.699157 5398.90 5.00 5403.90 16 39.530481 -107.697043 5402.71 5.00 5407.71 17 39.530523 -107.695986 5410.63 5.00 5415.63 18 39.530473 -107.695482 5413.41 5.00 5418.41 19 39.530241 -107.694044 5417.09 5.00 5422.09 20 39.530183 -107.693660 5419.24 5.00 5424.24 21 39.530158 -107.693127 5417.33 5.00 5422.33 22 39.530208 -107.688937 5428.84 5.00 5433.84 23 39.530214 -107.688168 5434.00 0.00 5434.00 24 39.530214 -107.688168 5434.00 0.00 5434.00 25 39.530221 -107.687226 5440.63 5.00 5445.63 Page 6 of 19 Name: 346 Path type: Two-way Observer view angle: 50.0° Vertex Latitude (°) Longitude (°)Ground elevation (ft) Height above ground (ft) Total elevation (ft) 1 39.531082 -107.709611 5383.76 5.00 5388.76 2 39.531140 -107.710137 5385.88 5.00 5390.88 3 39.531132 -107.710571 5388.52 5.00 5393.52 4 39.531008 -107.711220 5385.92 5.00 5390.92 5 39.530983 -107.711564 5387.47 5.00 5392.47 6 39.530999 -107.712283 5392.31 5.00 5397.31 7 39.530932 -107.712559 5395.74 5.00 5400.74 8 39.530672 -107.712978 5397.32 5.00 5402.32 9 39.530339 -107.712977 5393.88 5.00 5398.88 10 39.529950 -107.712824 5393.91 5.00 5398.91 11 39.529454 -107.712266 5397.37 5.00 5402.37 12 39.528891 -107.711505 5403.44 5.00 5408.44 13 39.527972 -107.709928 5413.80 5.00 5418.80 14 39.527757 -107.709670 5412.29 5.00 5417.29 Name: Mamm Creek Rd Path type: Two-way Observer view angle: 50.0° Vertex Latitude (°) Longitude (°)Ground elevation (ft) Height above ground (ft) Total elevation (ft) 1 39.517955 -107.691445 5509.21 5.00 5514.21 2 39.517545 -107.691177 5511.34 5.00 5516.34 3 39.515526 -107.690244 5516.01 5.00 5521.01 4 39.514192 -107.689590 5524.01 5.00 5529.01 5 39.513579 -107.689505 5524.69 5.00 5529.69 6 39.512859 -107.689687 5521.01 5.00 5526.01 7 39.512379 -107.689869 5522.34 5.00 5527.34 8 39.511618 -107.689805 5531.90 5.00 5536.90 9 39.510914 -107.689505 5540.39 5.00 5545.39 Page 7 of 19 Flight Path Receptors Name: Mamm Creek Rd Path type: Two-way Observer view angle: 50.0° Vertex Latitude (°) Longitude (°)Ground elevation (ft) Height above ground (ft) Total elevation (ft) 1 39.527757 -107.709664 5412.42 5.00 5417.42 2 39.526094 -107.707701 5421.80 5.00 5426.80 3 39.525713 -107.706929 5428.56 5.00 5433.56 4 39.525341 -107.706070 5434.65 5.00 5439.65 5 39.524999 -107.705637 5433.36 5.00 5438.36 6 39.523833 -107.704779 5448.09 5.00 5453.09 7 39.523439 -107.704489 5451.94 5.00 5456.94 8 39.523146 -107.704044 5457.88 5.00 5462.88 9 39.522935 -107.703438 5459.31 5.00 5464.31 10 39.522761 -107.702805 5462.89 5.00 5467.89 11 39.522422 -107.701935 5468.36 5.00 5473.36 12 39.521402 -107.699859 5472.67 5.00 5477.67 13 39.520847 -107.699017 5474.49 5.00 5479.49 14 39.520603 -107.698528 5474.58 5.00 5479.58 15 39.520058 -107.696407 5496.65 5.00 5501.65 16 39.519260 -107.694342 5503.30 5.00 5508.30 17 39.518324 -107.691981 5507.08 5.00 5512.08 18 39.517952 -107.691439 5509.31 5.00 5514.31 Name: FP 1 Description: Threshold height: 50 ft Direction: 267.7° Glide slope: 3.0° Pilot view restricted? Yes Vertical view: 30.0° Azimuthal view: 50.0° Point Latitude (°) Longitude (°)Ground elevation (ft) Height above ground (ft) Total elevation (ft) Threshold 39.526848 -107.715871 5531.41 50.00 5581.41 Two-mile 39.527994 -107.678372 5665.75 469.09 6134.84 Page 8 of 19 Discrete Observation Point Receptors Name ID Latitude (°) Longitude (°)Elevation (ft) Height (ft) OP 1 1 39.527062 -107.704011 5565.20 5.00 OP 2 2 39.530620 -107.701717 5385.72 5.00 OP 3 3 39.530618 -107.694772 5405.68 5.00 OP 4 4 39.530762 -107.695651 5402.95 5.00 OP 5 5 39.530452 -107.693759 5412.29 5.00 OP 6 6 39.529086 -107.681468 5638.19 5.00 OP 7 7 39.525633 -107.676241 5703.50 5.00 OP 8 8 39.514502 -107.686839 5680.92 5.00 OP 9 9 39.511917 -107.687227 5672.48 5.00 OP 10 10 39.510943 -107.672478 5787.57 5.00 Name: FP 2 Description: Threshold height: 50 ft Direction: 89.2° Glide slope: 3.0° Pilot view restricted? Yes Vertical view: 30.0° Azimuthal view: 50.0° Point Latitude (°) Longitude (°)Ground elevation (ft) Height above ground (ft) Total elevation (ft) Threshold 39.526352 -107.740161 5465.58 50.00 5515.58 Two-mile 39.525953 -107.777685 5302.93 766.07 6069.00 Page 9 of 19 Glare Analysis Results Summary of Results Glare with low potential for temporary after-image predicted PV Array Tilt Orient Annual Green Glare Annual Yellow Glare Energy ° ° min hr min hr kWh PV array 1 SA tracking SA tracking 0 0.0 0 0.0 - PV array 2 SA tracking SA tracking 4,820 80.3 0 0.0 - PV array 3 SA tracking SA tracking 3,802 63.4 0 0.0 - Total glare received by each receptor; may include duplicate times of glare from multiple reflective surfaces. Receptor Annual Green Glare Annual Yellow Glare min hr min hr 346 0 0.0 0 0.0 346 0 0.0 0 0.0 346 0 0.0 0 0.0 Mamm Creek Rd 0 0.0 0 0.0 Mamm Creek Rd 0 0.0 0 0.0 FP 1 8,622 143.7 0 0.0 FP 2 0 0.0 0 0.0 OP 1 0 0.0 0 0.0 OP 2 0 0.0 0 0.0 OP 3 0 0.0 0 0.0 OP 4 0 0.0 0 0.0 OP 5 0 0.0 0 0.0 OP 6 0 0.0 0 0.0 OP 7 0 0.0 0 0.0 OP 8 0 0.0 0 0.0 OP 9 0 0.0 0 0.0 OP 10 0 0.0 0 0.0 Page 10 of 19 PV: PV array 1 no glare found Receptor results ordered by category of glare Receptor Annual Green Glare Annual Yellow Glare min hr min hr 346 0 0.0 0 0.0 346 0 0.0 0 0.0 346 0 0.0 0 0.0 Mamm Creek Rd 0 0.0 0 0.0 Mamm Creek Rd 0 0.0 0 0.0 FP 1 0 0.0 0 0.0 FP 2 0 0.0 0 0.0 OP 1 0 0.0 0 0.0 OP 2 0 0.0 0 0.0 OP 3 0 0.0 0 0.0 OP 4 0 0.0 0 0.0 OP 5 0 0.0 0 0.0 OP 6 0 0.0 0 0.0 OP 7 0 0.0 0 0.0 OP 8 0 0.0 0 0.0 OP 9 0 0.0 0 0.0 OP 10 0 0.0 0 0.0 PV array 1 and Route: 346 No glare found PV array 1 and Route: 346 No glare found PV array 1 and Route: 346 No glare found PV array 1 and Route: Mamm Creek Rd No glare found PV array 1 and Route: Mamm Creek Rd No glare found PV array 1 and FP: FP 1 No glare found Page 11 of 19 PV array 1 and FP: FP 2 No glare found PV array 1 and OP 1 No glare found PV array 1 and OP 2 No glare found PV array 1 and OP 3 No glare found PV array 1 and OP 4 No glare found PV array 1 and OP 5 No glare found PV array 1 and OP 6 No glare found PV array 1 and OP 7 No glare found PV array 1 and OP 8 No glare found PV array 1 and OP 9 No glare found PV array 1 and OP 10 No glare found Page 12 of 19 PV: PV array 2 low potential for temporary after-image Receptor results ordered by category of glare Receptor Annual Green Glare Annual Yellow Glare min hr min hr 346 0 0.0 0 0.0 346 0 0.0 0 0.0 346 0 0.0 0 0.0 Mamm Creek Rd 0 0.0 0 0.0 Mamm Creek Rd 0 0.0 0 0.0 FP 1 4,820 80.3 0 0.0 FP 2 0 0.0 0 0.0 OP 1 0 0.0 0 0.0 OP 2 0 0.0 0 0.0 OP 3 0 0.0 0 0.0 OP 4 0 0.0 0 0.0 OP 5 0 0.0 0 0.0 OP 6 0 0.0 0 0.0 OP 7 0 0.0 0 0.0 OP 8 0 0.0 0 0.0 OP 9 0 0.0 0 0.0 OP 10 0 0.0 0 0.0 PV array 2 and Route: 346 No glare found PV array 2 and Route: 346 No glare found PV array 2 and Route: 346 No glare found PV array 2 and Route: Mamm Creek Rd No glare found PV array 2 and Route: Mamm Creek Rd No glare found Page 13 of 19 PV array 2 and FP: FP 1 Yellow glare: none Green glare: 4,820 min. PV array 2 and FP: FP 2 No glare found Page 14 of 19 PV array 2 and OP 1 No glare found PV array 2 and OP 2 No glare found PV array 2 and OP 3 No glare found PV array 2 and OP 4 No glare found PV array 2 and OP 5 No glare found PV array 2 and OP 6 No glare found PV array 2 and OP 7 No glare found PV array 2 and OP 8 No glare found PV array 2 and OP 9 No glare found PV array 2 and OP 10 No glare found Page 15 of 19 PV: PV array 3 low potential for temporary after-image Receptor results ordered by category of glare Receptor Annual Green Glare Annual Yellow Glare min hr min hr 346 0 0.0 0 0.0 346 0 0.0 0 0.0 346 0 0.0 0 0.0 Mamm Creek Rd 0 0.0 0 0.0 Mamm Creek Rd 0 0.0 0 0.0 FP 1 3,802 63.4 0 0.0 FP 2 0 0.0 0 0.0 OP 1 0 0.0 0 0.0 OP 2 0 0.0 0 0.0 OP 3 0 0.0 0 0.0 OP 4 0 0.0 0 0.0 OP 5 0 0.0 0 0.0 OP 6 0 0.0 0 0.0 OP 7 0 0.0 0 0.0 OP 8 0 0.0 0 0.0 OP 9 0 0.0 0 0.0 OP 10 0 0.0 0 0.0 PV array 3 and Route: 346 No glare found PV array 3 and Route: 346 No glare found PV array 3 and Route: 346 No glare found PV array 3 and Route: Mamm Creek Rd No glare found PV array 3 and Route: Mamm Creek Rd No glare found Page 16 of 19 PV array 3 and FP: FP 1 Yellow glare: none Green glare: 3,802 min. PV array 3 and FP: FP 2 No glare found Page 17 of 19 PV array 3 and OP 1 No glare found PV array 3 and OP 2 No glare found PV array 3 and OP 3 No glare found PV array 3 and OP 4 No glare found PV array 3 and OP 5 No glare found PV array 3 and OP 6 No glare found PV array 3 and OP 7 No glare found PV array 3 and OP 8 No glare found PV array 3 and OP 9 No glare found PV array 3 and OP 10 No glare found Page 18 of 19 Assumptions Default glare analysis parameters and observer eye characteristics (for reference only): • Analysis time interval: 1 minute • Ocular transmission coefficient: 0.5 • Pupil diameter: 0.002 meters • Eye focal length: 0.017 meters • Sun subtended angle: 9.3 milliradians © Sims Industries d/b/a ForgeSolar, All Rights Reserved. "Green" glare is glare with low potential to cause an after-image (flash blindness) when observed prior to a typical blink response time. "Yellow" glare is glare with potential to cause an after-image (flash blindness) when observed prior to a typical blink response time. Times associated with glare are denoted in Standard time. For Daylight Savings, add one hour. The algorithm does not rigorously represent the detailed geometry of a system; detailed features such as gaps between modules, variable height of the PV array, and support structures may impact actual glare results. However, we have validated our models against several systems, including a PV array causing glare to the air-traffic control tower at Manchester-Boston Regional Airport and several sites in Albuquerque, and the tool accurately predicted the occurrence and intensity of glare at different times and days of the year. Several V1 calculations utilize the PV array centroid, rather than the actual glare spot location, due to algorithm limitations. This may affect results for large PV footprints. Additional analyses of array sub-sections can provide additional information on expected glare. This primarily affects V1 analyses of path receptors. Random number computations are utilized by various steps of the annual hazard analysis algorithm. Predicted minutes of glare can vary between runs as a result. This limitation primarily affects analyses of Observation Point receptors, including ATCTs. Note that the SGHAT/ ForgeSolar methodology has always relied on an analytical, qualitative approach to accurately determine the overall hazard (i.e. green vs. yellow) of expected glare on an annual basis. The analysis does not automatically consider obstacles (either man-made or natural) between the observation points and the prescribed solar installation that may obstruct observed glare, such as trees, hills, buildings, etc. The subtended source angle (glare spot size) is constrained by the PV array footprint size. Partitioning large arrays into smaller sections will reduce the maximum potential subtended angle, potentially impacting results if actual glare spots are larger than the sub-array size. Additional analyses of the combined area of adjacent sub-arrays can provide more information on potential glare hazards. (See previous point on related limitations.) The variable direct normal irradiance (DNI) feature (if selected) scales the user-prescribed peak DNI using a typical clear-day irradiance profile. This profile has a lower DNI in the mornings and evenings and a maximum at solar noon. The scaling uses a clear-day irradiance profile based on a normalized time relative to sunrise, solar noon, and sunset, which are prescribed by a sun-position algorithm and the latitude and longitude obtained from Google maps. The actual DNI on any given day can be affected by cloud cover, atmospheric attenuation, and other environmental factors. The ocular hazard predicted by the tool depends on a number of environmental, optical, and human factors, which can be uncertain. We provide input fields and typical ranges of values for these factors so that the user can vary these parameters to see if they have an impact on the results. The speed of SGHAT allows expedited sensitivity and parametric analyses. The system output calculation is a DNI-based approximation that assumes clear, sunny skies year-round. It should not be used in place of more rigorous modeling methods. Hazard zone boundaries shown in the Glare Hazard plot are an approximation and visual aid based on aggregated research data. Actual ocular impact outcomes encompass a continuous, not discrete, spectrum. Glare locations displayed on receptor plots are approximate. Actual glare-spot locations may differ. Refer to the Help page at www.forgesolar.com/help/ for assumptions and limitations not listed here. Page 19 of 19 GARFIELD COUNTY RURAL ZONING DESIGNATION GARFIELD COUNTY RURAL ZONING DESIGNATION DATE PROJECT TITLE: DESCRIPTION APV: PROJECT LOCATION: NO. KEY PLAN: PE STAMP: REVISIONS: SHEET NO:REV: SCALE AT 24" x 36": CHK: DWN: DES: DATE: PROJ NUM: SHEET TITLE & DESCRIPTION: 2180 South 1300 East, Suite 600 Salt Lake City, UT 84106-2749 (801) 679 - 3500 ELECTRIC POWER ENGINEERING, INC. 12600 W. COLFAX AVE, STE. C500 LAKEWOOD, CO 80215 (303) 431-7895 www.neieng.com CIVIL COVER ---- PRELIMINARY NOT FOR CONSTRUCTION FOR REVIEW & APPROVAL ONLY PROJECT LOCATION VICINITY MAP N.T.S. SITE DATA TABLE PROJECT LOCATION RIFLE, COLORADO PROPERTY AREA 96.12 ACRES ALTA SURVEY EAGLE SPRINGS SOLAR SITE PREPARED BY ROADRUNNER SURVEY & MAPPING DATED 11/20/22 HYDROLOGY SURVEY EAGLE SPRINGS SOLAR SITE PRELIMINARY HYDROLOGY STUDY PREPARED BY WESTWOOD DATED 01/16/23 GEOTECHNICAL SURVEY EAGLE SPRINGS SOLAR SITE GEOTECHNICAL ENGINEERING REPORT PREPARED BY TERRACON DATED 3/1/23 VEGETATION MANAGEMENT AND RECLAMATION PLAN EAGLE SPRINGS SOLAR SITE VEGETATION MANAGEMENT AND RECLAMATION PLAN PREPARED BY TRC DATED 3/10/23 N PROJECT SOLAR CIVIL QUANTITIES ITEM QTY UNIT DESCRIPTION CLEARING AND GRUBBING 53.9 AC FENCE LIMITS LOD LIMITS 67.95 AC ARRAY AND ROAD IMPROVEMENT LIMITS FENCE 11502 LF 8' WILD LIFE FENCE ENTRANCE GATES 4 EA 25' WIDE PROPOSED INTERNAL ACCESS ROADS - 20' WIDE 3507 LF COMPACTED SUBGRADE WITH 12" COMPACTED GRAVEL BASE PROPOSED IMPROVEMENT OF EXISTING FARM ROAD - 12' WIDE 674 LF COMPACTED SUBGRADE WITH 12" COMPACTED GRAVEL BASE EXISTING PERIMETER ACCESS ROAD TO BE IMPROVED TO 12 FT WIDTH AS NEEDED 2950 LF COMPACTED GRAVEL SILT FENCE 3343 LF SEDIMENT CONTROL LOG 4696 LF SEDIMENT BERM 1245 LF ROCK FILTERED DAM 6 EA BMP CONSTRUCTION ENTRANCE AGGREGATE 55 CY 2-3" STONE, 6" THICK. 20'W x 50'L CONSTRUCTION LAYDOWN AREA 4.04 AC SITE EARTHWORK - CUT 2285.51 CY SITE EARTHWORK - FILL 1576.73 CY SITE EARTHWORK - NET 708.76 CY NET CUT 30% CIVIL DRAWINGS FOREAGLE SPRINGS ORGANIC SILT, CO HWY 346 I-70 SITE INFORMATION ASHRAE STATION NAME:RIFLE GARFIELD COUNTY AP ASHRAE 0.4% DB MAX. TEMPERATURE:35.1°C ASHRAE ANNUAL DB MEAN MIN. TEMP.:-22.7°C LATITUDE:39.5225° LONGITUDE:-107.6953° PV ARRAY MODULE QUANTITY:30184 TOTAL STRINGS:1078 MODULE MODULE MANUFACTURER:ZSHINE SOLAR MODULE MODEL #:ZXM7-SHLDD144 STC WATTAGE (W):540 VOLTAGE RATING (V):1500V MODULES PER STRING:28 INVERTER INVERTER MANUFACTURER:GPTECH INVERTER MODEL #:AMPS2Ms2.2Bs-WD3-V890 KVA @ 35°C:2931kVA MAX. INPUT VOLTAGE (V-DC):1500V INVERTER QUANTITY:8 (2 INVERTER MODULES PER UNIT) TRACKER TRACKER MANUFACTURER AND MODEL:SOLTEC SF7 AZIMUTH (DEG):180 CONFIGURATION:2 PORTRAIT ROTATION ANGLE LIMITS:+/- 55° 84 MODULE (3-STRING) TRACKER QTY:342 56 MODULE (2-STRING) TRACKER QTY:26 TOTAL TRACKER QTY:368 PITCH (FT) / GCR (%):33.29 FT / 45% MIN INTER-ROW SPACING 18.34 FT BATTERY STORAGE SYSTEM BESS (2) BESS STORAGE CONTAINERS PER PCS SYSTEM INFORMATION MW-AC @ POI:10 MW NAMEPLATE MVA:11.2 MVA POI VOLTAGE (kV):24.9kV MW-DC:16.31 MW SITE DC-AC RATIO @POI 1.63 THE EAGLE SPRINGS ORGANIC SOLAR PROJECT SITE IS LOCATED IN SILT, CO, JUST EAST OF THE RIFLE GARFIELD COUNTY AIRPORT. THE SITE IS A 10 MWAC SOLAR PHOTOVOLTAIC PLUS 20MWH BESS PLANT. THE PLANT WILL BE CONSTRUCTED ON ~96 ACRES OF OPEN LAND. THE COMMERCIAL OPERATION DATE (COD) FOR THE PROJECT IS ANTICIPATED TO BE IN Q4 2024. THE SOLAR POWERPLANT WILL CONSIST OF BIFACIAL SOLAR PANELS INSTALLED ON A 2P SINGLE-AXIS TRACKING SYSTEM, ELECTRICAL EQUIPMENT PADS FOR EQUIPMENT SUCH AS TRANSFORMERS AND CENTRAL INVERTERS, AND UNDERGROUND AND OVERHEAD ELECTRICAL CIRCUITS. THE PROJECT WILL INTERCONNECT TO HOLY CROSS ENERGY 24.9 KV FEEDER. PER ALTA/NSPS COMPLETED JULY 20,2022 BY ROADRUNNER SURVEY & MAPPING. LEGAL DESCRIPTION PROJECT DATA AND CODE INFORMATION PROJECT NAME:EAGLE SPRINGS ORGANIC PROJECT ADDRESS:5454 CO ROAD 346 SILT, CO 81652 39.5225°, -107.6953° COUNTY:GARFIELD COUNTY COMMUNITY DEVELOPMENT DEPARTMENT 108 8TH STREET, SUITE 401 GLENWOOD SPRINGS, CO 81601 OWNER NAME:AES LOT SIZE:96.12 AC PROJECT DESCRIPTION FLOOD ZONE DESIGNATION: THE UNDERGROUND UTILITIES (IF ANY) THAT APPEAR ON THIS MAP HAVE BEEN LOCATED BY FIELD OBSERVATION. THE SURVEYOR MAKES NO GUARANTEE THAT THE UNDERGROUND UTILITIES SHOWN COMPRISE ALL SUCH UTILITIES IN THE AREA, EITHER IN SERVICE OR ABANDONED. THE SURVEYOR FURTHER DOES NOT WARRANT THAT THE UNDERGROUND UTILITIES SHOWN ARE IN THE EXACT LOCATION INDICATED ALTHOUGH HE DOES STATE THAT THEY ARE LOCATED AS ACCURATELY AS POSSIBLE FROM THE INFORMATION AVAILABLE. THE PROPERTY SHOWN HEREON LIES IN AN AREA OF UNDETERMINED, BUT POSSIBLE FLOOD HAZARD, PER FEMA FIRM MAP PANEL 0802051360B, DATED DECEMBER 15, 1977. UTILITY NOTES: PROJECT TEAM OWNER / APPLICANT AES CLEAN ENERGY 282 CENTURY PLACE, SUITE 200 LOUISVILLE, CO 80027 CONTACT: BENJAMIN DERMER T: 720-646-5224 EMAIL: BENJAMIN.DERMER@AES.COM ELECTRICAL / STRUCTURAL / CIVIL NEI ELECTRICAL POWER ENGINEERING 12600 WEST COLFAX AVE., STE 500 LAKEWOOD, COLORADO 80215 CONTACT:JONATHAN DIMITRIOU EMAIL: JDIMITRIOU@NEIENG.COM PL O T T E D : 6/ 2 7 / 2 0 2 3 1 0 : 1 1 A M H: \ P r o j e c t \ 4 0 0 0 \ 4 0 8 4 . 0 0 1 - E a g l e S p r i n g s P V B E S S - 3 0 p c t P V B E S S - A E S \ 4 _ D W G s \ 2 _ N E I \ S o l a r \ P V C I V \ P V - C . 0 1 . 0 1 C I V I L C O V E R . d w g XR E F s : . . \ . . \ 2 _ S h e e t s e t R e f e r e n c e s \ A E S T i t l e b l o c k O u t l i n e . d w g ; . . \ . . \ 2 _ S h e e t s e t R e f e r e n c e s \ E S P R 1 - E A G L E S P R I N G S _ R E V 2 . d w g AE S T i t l e b l o c k 2 4 X 3 6 v 2 1 0 2 0 9 EAGLE SPRINGS ORGANIC SILT, CO 4084.001 JPD JPD BC BC 6/21/23 PV-C.01.01 E A 1/23/23 30% SUBMITTAL B 2/16/23 30% RESUBMITTAL C 3/17/23 30% RESUBMITTAL D 3/29/23 30% RESUBMITTAL E 6/21/23 30% RESUBMITTAL --- --- --- HYDROLOGY STUDY WESTWOOD 12701 WHITEWATER DRIVE, SUITE 300 MINNETONKA, MN 55343 T: (952) 937-5150 ALTA SURVEY ROADRUNNER SURVEY & MAPPING, INC 2130 ROADRUNNER TRL. RIESEL, TX 76682 T: (254) 730-7574 EMAIL: INFO@RSMROADRUNNER.COM GEOTECHNICAL REPORT TERRACON 6949 SOUTH HIGH TECH DRIVE MIDVALE, UTAH 84047 T: (801) 545-8500 SHEET LIST SHEET NUMBER SHEET TITLE PV-C.01.01 CIVIL COVER PV-C.01.02 CIVIL NOTES PV-C.01.03 EXISTING CONDITIONS PV-C.02.01 CONSTRAINTS MAP PV-C.03.01 CIVIL SITE PLAN PV-C.05.01 ROAD USE PLAN PV-C.06.01 GRADING & EROSION CONTROL PLAN PV-C.07.01 EROSION CONTROL DETAILS PV-C.07.02 EROSION CONTROL DETAILS PV-C.08.01 SITE DETAILS PV-C.09.01 FENCE DETAILS --ALTA SHEETS FROM ROAD RUNNER SURVEYING & MAPPING, INC MA M M C R E E K R D PV-C.06.02 RESTORATION PLAN PV-C.01.04 EXISTING CONDITIONS - SLOPE ANALYSIS W W W W W W W W W W W W W W W W W W W W W W W W W W W W W W W W W W W W W W W W W WWWW WW W W W W W W W W WW W W W W W W W W W G G G G G GG G G PARCEL 1 PARCEL 2 PARCEL 3 EAGLE SPRINGS ORGANIC, LLC APN: 217918100691 EAGLE SPRINGS ORGANIC, LLC APN: 21791174007310 EAGLE SPRINGS ORGANIC, LLC APN: 217917300732 EAGLE SPRINGS ORGANIC, LLC APN: 217917300732 EXISTING SOLAR SITE B & B MAMM CREEK, LLC APN: 217919100511 BEDROCK RESOURCES, LLC APN: 217918400720 15' IRRIG. PIPELINE ESMT ORGANIC GROWERS, LLC APN: 217917200687 30' ACCESS ESMT 30' ACCESS ESMT OVERHEAD POWER LINES (HOLY CROSS) ESMT. 15' IRRIGATION ESMT OVERHEAD POWER LINES (HOLY CROSS) 30' ELECTRICAL ESMT OVERHEAD POWER LINES (HOLY CROSS) PROCESS WATER LINE (2) GAS LINE (1) PROCESS WATER LINE (2) GAS LINE (1) PROCESS WATER LINE (2) GAS LINE (1) EX. GRAVEL ACCESS ROAD ℄ EX. LOW MAINTENANCE ROAD ℄ EX. GRAVEL LOW MAINTENANCE ROAD ℄ EX. GRAVEL ACCESS ROAD ℄ EX. WELL PAD EX. WELL PAD PROCESS WATER LINE (2) GAS LINE (1) EX. OUTBUILDING EX.GREENHOUSES EX. OUTBUILDING EX. OUTBUILDING COUNTY ROAD 315 25' WIDE PIPELINE ESMT 20' PIPELINE ESMT 15' IRR. ESMT EX. CULVERT ℄ 30'R (TYP) PROPOSED LAYDOWN AREA (176,228 SF) 403' 271' EX. GRAVEL ACCESS ROAD ℄ 20' EX. ACCESS ROAD (EX RD TO BE IMPROVED) 20' ACCESS ROAD 20' EX. GRAVEL ACCESS ROAD ℄ EX. GRAVEL ACCESS ROAD ℄ EX. GRAVEL ACCESS ROAD ℄ EX. LOW MAINTENANCE ROAD ℄ TO BE MOVED EX. LOW MAINTENANCE ROAD ℄ EX. WELL PAD EX. GRAVEL ACCESS ROAD ℄ 30'R (TYP) PARCEL BOUNDARY (TYP) 284.31' 142.12' 519.67' 119.4' EX. ACCESS ROAD EX. ACCESS ROAD 12' EX. PERIMETER ACCESS ROAD (EX. RD IMPROVEMENT - AS NEEDED) EX. CULVERT ℄12' EX. PERIMETER ACCESS ROAD (EX. ROAD TO BE IMPROVED ) 20' EX. ACCESS ROAD (EX. ROAD TO BE IMPROVED) 3' MAN GATE 3' MAN GATE 3' MAN GATE 3' MAN GATE 30'R (TYP) EX. ACCESS ROAD EX. ACCESS ROAD EX. ACCESS ROAD PROCESS WATER LINE (2) GAS LINE (1) 12' PERIMETER ACCESS ROAD 12' PERIMETER ACCESS ROAD 12' PERIMETER ACCESS ROAD 30'R (TYP) 30'R (TYP) 12' PERIMETER ACCESS ROAD 12' PERIMETER ACCESS ROAD 30'R (TYP) 30'R (TYP) 30'R (TYP) 20' ACCESS ROAD 20' ACCESS ROAD 3' MAN GATE3' MAN GATE 3' MAN GATE 3' MAN GATE 3' MAN GATE 3' MAN GATE 3' MAN GATE 3' MAN GATE 3' MAN GATE 3' MAN GATE 3' MAN GATE EX. LOW MAINTENANCE ROAD ℄ OVERHEAD POWER POLE AND GUY WIRES (HOLY CROSS) 12' PERIMETER ACCESS ROAD (EX. FIELD RD TO BE IMPROVED - AS NEEDED) 3' MAN GATE 18.34' 17'33.29' 33.29'18.34' 33.29'18.34' EX. CULVERT ℄ PCS, BESS & SWITCHGEAR PAD EX. FENCE TO BE REMOVED EX. FENCE EX. FENCE EX. FENCE EX. FENCE EX. FENCE 12' EX. PERIMETER ACCESS ROAD 12' ACCESS ROAD 20' 20' 20' 20' 20' 20' 20' 20' 20' L2 L3 L4 L5 L6 L7 L8 C1 C 2 L1 1 C3 L13 C4 L1 5 L16L17L18C5 L20 EX. EPHEMERAL DITCH EX. EPHEMERAL DITCH EX. EPHEMERAL DITCH EX. EPHEMERAL DITCH EX. EPHEMERAL DITCH EX. EPHEMERAL DITCH EX. CONCRETE PAD (USE UNKNOWN) 1 1 1 1 20' 30'R (TYP) CULVERT A O&M SHED (20' X 8') ALBEDOMETER W/ 30' SETBACK 30'R (TYP) L32 L33C10 L35 L3 6 L3 7 L3 9 L40 L1 EX. IMPROVEMENTS TO BE REMOVED (APPROX. LOCATION) EX. FENCE TO BE REMOVED MIN. 48" GAS LINE COVERAGE REQURED MIN. 48" GAS LINE COVERAGE REQUIRED EX. FENCE TO BE REMOVED 75' CULVERT B CULVERT C CURVE TABLE CURVE NO. C10 LENGTH 22.13' RADIUS 60.00' DELTA 21°07'40" Line Table Line # L39 Length 203.748 Direction N00° 00' 00.00"E OPERATED BY AES CLEAN ENERGY IN CASE OF EMERGENCY CALL: (855) 679-3553 PLACE ON ALL VEHICLE ACCESS GATES DATE PROJECT TITLE: DESCRIPTION APV: PROJECT LOCATION: NO. KEY PLAN: PE STAMP: REVISIONS: SHEET NO:REV: SCALE AT 24" x 36": CHK: DWN: DES: DATE: PROJ NUM: SHEET TITLE & DESCRIPTION: 2180 South 1300 East, Suite 600 Salt Lake City, UT 84106-2749 (801) 679 - 3500 ELECTRIC POWER ENGINEERING, INC. 12600 W. COLFAX AVE, STE. C500 LAKEWOOD, CO 80215 (303) 431-7895 www.neieng.com 0 75'150'225'300' 1" = 150' CIVIL SITE PLAN ---- PL O T T E D : 6/ 2 7 / 2 0 2 3 1 0 : 1 1 A M H: \ P r o j e c t \ 4 0 0 0 \ 4 0 8 4 . 0 0 1 - E a g l e S p r i n g s P V B E S S - 3 0 p c t P V B E S S - A E S \ 4 _ D W G s \ 2 _ N E I \ S o l a r \ P V C I V \ P V - C . 0 3 . 0 1 C I V I L S I T E P L A N . d w g XR E F s : H : \ P r o j e c t \ 4 0 0 0 \ 4 0 8 4 . 0 0 1 - E a g l e S p r i n g s P V B E S S - 3 0 p c t P V B E S S - A E S \ 4 _ D W G s \ 2 _ N E I \ 2 _ S h e e t s e t R e f e r e n c e s \ A E S T i t l e b l o c k O u t l i n e . d w g ; H : \ P r o j e c t \ 4 0 0 0 \ 4 0 8 4 . 0 0 1 - E a g l e S p r i n g s P V B E S S - 3 0 p c t P V B E S S - A E S \ 4 _ D W G s \ 2 _ N E I \ 2 _ S h e e t s e t R e f e r e n c e s \ E S P R 1 - A R R A Y S - 4 5 % . d w g ; H : \ P r o j e c t \ 4 0 0 0 \ 4 0 8 4 . 0 0 1 - E a g l e S p r i n g s P V B E S S - 3 0 p c t P V B E S S - A E S \ 4 _ D W G s \ 2 _ N E I \ 2 _ S h e e t s e t R e f e r e n c e s \ E S P R 1 - E A G L E S P R I N G S _ R E V 2 . d w g ; H : \ P r o j e c t \ 4 0 0 0 \ 4 0 8 4 . 0 0 1 - E a g l e S p r i n g s P V B E S S - 3 0 p c t P V B E S S - A E S \ 4 _ D W G s \ 2 _ N E I \ 2 _ S h e e t s e t R e f e r e n c e s \ C I V I L . d w g ; H : \ P r o j e c t \ 4 0 0 0 \ 4 0 8 4 . 0 0 1 - E a g l e S p r i n g s P V B E S S - 3 0 p c t P V B E S S - A E S \ 4 _ D W G s \ 2 _ N E I \ 2 _ S h e e t s e t R e f e r e n c e s \ C I V I L - C O N S T R A I N T S . d w g AE S T i t l e b l o c k 2 4 X 3 6 v 2 1 0 2 0 9 EAGLE SPRINGS ORGANIC SILT, CO 4084.001 JPD JPD VEC VEC 6/21/23 PV-C.03.01 E A 1/23/23 30% SUBMITTAL B 2/16/23 30% RESUBMITTAL C 3/17/23 30% RESUBMITTAL D 3/29/23 30% RESUBMITTAL E 6/21/23 30% RESUBMITTAL --- --- --- PRELIMINARY NOT FOR CONSTRUCTION FOR REVIEW & APPROVAL ONLY N GENERAL LEGEND HORIZONTAL CONTROL EXISTING FEATURES PROPOSED FEATURES LoD PROPOSED DISTURBANCE LIMITS PROPOSED SECURITY FENCE PROPOSED CONSTRUCTION LAYDOWN AREA PROPOSED EQUIPMENT PAD EXISTING PARCEL LINE EXISTING FENCE EXISTING EASEMENT EXISTING POWER POLE EXISTING ROAD CENTERLINE EXISTING TREE LINE EXISTING OVERHEAD POWER PROPOSED CULVERT W EXISTING PROCESS WATERLINE G EXISTING GASLINE EXISTING STREAM PROPOSED HEAVY DUTY ACCESS ROAD EXISTING ROAD PROPOSED HEAVY DUTY IMPROVEMENT OF EXISTING ACCESS ROAD (SEE SITE DETAIL 3) PROPOSED LIGHT DUTY IMPROVEMENT OF EXISTING ACCESS ROAD (SEE SITE DETAIL 3) KEY NOTES: PROPOSED 25' ACCESS GATE1 SIGNAGE NO SOLAR CONSTRUCTION TRAFFIC BEYOND THIS POINT NO SOLAR CONSTRUCTION TRAFFIC BEYOND THIS POINT NO SOLAR CONSTRUCTION TRAFFIC BEYOND THIS POINT 20' ACCESS ROAD (EX RD IMPROVEMENT TO CONTINUE TO MAMM CREEK RD- AS NEEDED) NO SOLAR CONSTRUCTION TRAFFIC BEYOND THIS POINT MAMM CREEK RD MAMM CREEK RD 0 100'200'300'400' 1" = 200' DATE PROJECT TITLE: DESCRIPTION APV: PROJECT LOCATION: NO. KEY PLAN: PE STAMP: REVISIONS: SHEET NO:REV: SCALE AT 24" x 36": CHK: DWN: DES: DATE: PROJ NUM: SHEET TITLE & DESCRIPTION: 2180 South 1300 East, Suite 600 Salt Lake City, UT 84106-2749 (801) 679 - 3500 ELECTRIC POWER ENGINEERING, INC. 12600 W. COLFAX AVE, STE. C500 LAKEWOOD, CO 80215 (303) 431-7895 www.neieng.com ROAD USE PLAN CIVIL PL O T T E D : 6/ 2 7 / 2 0 2 3 1 0 : 1 2 A M H: \ P r o j e c t \ 4 0 0 0 \ 4 0 8 4 . 0 0 1 - E a g l e S p r i n g s P V B E S S - 3 0 p c t P V B E S S - A E S \ 4 _ D W G s \ 2 _ N E I \ S o l a r \ P V C I V \ P V - C . 0 5 . 0 1 R O A D U S E P L A N . d w g XR E F s : . . \ . . \ 2 _ S h e e t s e t R e f e r e n c e s \ A E S T i t l e b l o c k O u t l i n e . d w g ; . . \ . . \ 2 _ S h e e t s e t R e f e r e n c e s \ C I V I L . d w g ; . . \ . . \ 2 _ S h e e t s e t R e f e r e n c e s \ E S P R 1 - A R R A Y S - 4 5 % . d w g ; . . \ . . \ 2 _ S h e e t s e t R e f e r e n c e s \ C I V I L - C O N S T R A I N T S . d w g ; . . \ . . \ 2 _ S h e e t s e t R e f e r e n c e s \ E S P R 1 - E A G L E S P R I N G S _ R E V 2 . d w g AE S T i t l e b l o c k 2 4 X 3 6 v 2 1 0 2 0 9 EAGLE SPRINGS ORGANIC SILT, CO 4084.001 JPD JPD BC BC 6/21/23 PV-C.05.01 E A 1/23/23 30% SUBMITTAL B 2/16/23 30% RESUBMITTAL C 3/17/23 30% RESUBMITTAL D 3/29/23 30% RESUBMITTAL E 6/21/23 30% RESUBMITTAL --- --- --- PRELIMINARY NOT FOR CONSTRUCTION FOR REVIEW & APPROVAL ONLY 200'100'0 200'400'600' 1"=200' N 20' ACCESS ROAD (NEW CONSTUCTION) PROPOSED EGRESS PROPOSED FEATURES PROPOSED INGRESS PROPOSED EGRESS - EMS ONLY PROPOSED INGRESS - EMS ONLY GENERAL LEGEND EXISTING FEATURES EX. PARCEL LINE EX. LOW MAINTENANCE ROAD CENTERLINE PROPOSED CONSTRUCTION LAYDOWN AREA EX. GRAVEL ROAD CENTERLINE EXISTING ROADWAY TO BE IMPROVED TO MIN 12' WIDTH (AS NEEDED) EXISTING TRACK ROAD TO BE IMPROVED TO 12' LIGHT DUTY PERIMETER ROAD 5 5 8 0 5590 56 0 0 5610 5 5 6 0 5 5 7 0 5 5 8 0 55 9 0 5590 55 9 0 5600 5610 5620 55 8 0 55 9 0 56005610 5620 5610 5620 5630 5620 5630 5640 56 5 0 56 1 0 56 1 0 5 6 1 0 5 6 2 0 56 3 0 5640 W W W W W W W W W W W W W W W W W W W W W W W W W W W W W W W W W W W W W W W W W WWWW WW W W W W W W W W WW W W W W W W W W W G G G G G GG G G 5650 56 6 0 5670 5660 5 5 9 0 5580 5590 5610 CW IPOP SF SF SF SF SF SF SF SF SF SF SF SF SF SF SF SFSF SF SF SF SF SF SF SF SF SF SF SF SF SF SF SF SF SF SF SF SF SF SF SF TSS VTC VTC SFO SF SF SF SF SF SF SF SF SF SF SCL SCL SCL SCL SC L SCL SCL SCL SC L 5615 SCL 56 1 0 56 1 5 5 6 2 0 562 5 5 6 3 0 56 3 5 5625 5610 5 6 1 5 56 2 0 5625 56 3 0 5635 5 6 4 0 5 6 4 5 565 0 5 6 5 5 5 6 6 0 5665 5 6 7 0 5 6 7 5 SF 55 8 0 5 5 8 0 5 5 8 0 55 8 5 55 9 0 5590 5595 559 5 55 9 5 5595 5595 5600 56 0 0 5600 56 0 0 56 0 5 5605 5605 560 5 560 5 560 5 5605 56 1 0 561 0 561 0 561 0 5615 56 1 5 561 5 5 6 1 5 561 5 5 6 2 0 5620 55 7 6 55 7 7 5 5 7 7 55 7 8 5 5 7 8 5 5 7 8 5 5 7 9 5 5 7 9 55 7 9 55 8 1 55 8 1 5 5 8 1 55 8 2 55 8 2 55 8 3 55 8 4 55 8 6 55 8 8 55 9 1 55 9 1 559 1 5591 559 2 559 2 55 9 2 5592 55 9 3 5593 559 3 5593 55 9 3 559 4 559 4 55 9 4 559 4 5596 55 9 6 5596 5596 5597 5597 5597 55 9 7 559 8 559 8 5598 55 9 9 55 9 9 5599 559 9 5599 5599 560 1 56 0 1 56 0 1 5601 5601 560 2 5602 5602 56 0 2 56 0 2 5603 5603 560 3 56 0 3 56 0 3 560 3 560 4 560 4 56 0 4 560 4 56 0 4 5604 5604 5604 560 6 56 0 6 5606 560 6 560 6 560 6 560 7 560 7 560 7 56 0 7 560 7 56 0 8 5608 560 8 5608 560 8 560 9 5609 5609 560 9 560 9 56 1 1 561 1 561 1 561 1 561 2 5612 5612 56 1 2 5612 56 1 3 5613 561 3 5613 5613 561 4 56 1 4 5614 56 1 4 5614 561 6 56 1 6 56 1 6 5617 56 1 7 561 7 56 1 8 5618 5 6 1 8 56 1 9 5 6 1 9 561 9 5 6 2 1 5621 5622 5 6 2 2 55 9 0 55 8 9 55 9 1 5592 56 1 0 56 1 1 5612 559 5 5600 560 5 560 5 560 5 56 1 0 56 1 0 5615 56 1 5 55 9 3 55 9 4 55 9 6 559 7 559 8 559 9 560 1 5601 560 2 5602 560 3 560 3 560 4 560 4 560 4 560 6 560 6 560 7 560 7 56 0 8 560 8 56 0 9 560 9 56 1 1 561 1 56 1 2 5612 5613 56 1 3 56 1 4 5614 56 1 6 5616 561 6 561 7 5617 5618 561 0 5615 560 9 561 1 5612 5613 5614 5616 5617 5618 5612 5613 5614 5 6 1 5 5 6 2 0 5 6 1 4 5 6 1 6 5 6 1 7 5 6 1 8 5 6 1 9 561 5 5620 5613 5614 561 6 561 7 5618 5619 5621 5 6 2 5 5 6 2 2 56 2 3 56 2 4 5 6 2 6 5 6 2 7 562 8 5 6 2 9 5625 5624 5626 56 1 5 562 0 5625 5630 561 1 561 2 561 3 56 1 4 56 1 6 5 6 1 7 5 6 1 8 56 1 9 5621 5622 5623 5624 5626 5627 5628 5629 56355634 56 1 5 5 6 2 0 5 6 1 2 5 6 1 3 56 1 4 56 1 6 56 1 7 56 1 8 5 6 1 9 5 6 2 5 5 6 3 0 56 3 5 5 6 2 2 5 6 2 3 5 6 2 4 5 6 2 6 5 6 2 7 5 6 2 8 5 6 2 9 5 6 3 1 5 6 3 2 5 6 3 3 56 3 4 56 3 6 563 7 5638 5639 5620 5618 5619 5621 5622 5623 5627 5628 5629 563 0 5627 562 8 562 9 5630 563 5 562 8 562 9 563 1 5632 56 3 3 56 3 4 56 3 6 56 3 7 563 1 563 2 5633 563 4 563 4 56 4 0 56 3 8 56 3 9 56 4 1 56 4 2 564 3 564 4 56 4 2 56 4 3 56 4 4 5621 56 2 2 5623 56 2 4 VTC SF SF SFTSS 5 6 2 2 5 6 2 3 SF SF SFSFSF SF SF SF SF SF SF SF SF SF SF SF SF SFO SFO PARCEL 1 PARCEL 2 PARCEL 3 EAGLE SPRINGS ORGANIC, LLC APN: 217918100691 EAGLE SPRINGS ORGANIC, LLC APN: 21791174007310 EAGLE SPRINGS ORGANIC, LLC APN: 217917300732 EAGLE SPRINGS ORGANIC, LLC APN: 217917300732 EXISTING SOLAR SITE B & B MAMM CREEK, LLC APN: 217919100511 BEDROCK RESOURCES, LLC APN: 217918400720 ORGANIC GROWERS, LLC APN: 217917200687 OVERHEAD POWER LINES (HOLY CROSS) ESMT. OVERHEAD POWER LINES (HOLY CROSS) OVERHEAD POWER LINES (HOLY CROSS) PROCESS WATER LINE (2) GAS LINE (1) PROCESS WATER LINE (2) GAS LINE (1) PROCESS WATER LINE (2) GAS LINE (1) EX. GRAVEL ACCESS ROAD ℄ EX. LOW MAINTENANCE ROAD ℄ EX. GRAVEL LOW MAINTENANCE ROAD ℄ EX. GRAVEL ACCESS ROAD ℄ EX. WELL PAD EX. WELL PAD PROCESS WATER LINE (2) GAS LINE (1) EX. OUTBUILDING EX.GREENHOUSES EX. OUTBUILDING EX. OUTBUILDING COUNTY ROAD 315 EX. CULVERT ℄ EX. GRAVEL ACCESS ROAD ℄ EX. GRAVEL ACCESS ROAD ℄ EX. GRAVEL ACCESS ROAD ℄ EX. GRAVEL ACCESS ROAD ℄ EX. LOW MAINTENANCE ROAD ℄ TO BE MOVED EX. LOW MAINTENANCE ROAD ℄ EX. WELL PAD EX. GRAVEL ACCESS ROAD ℄ PARCEL BOUNDARY (TYP) EX. CULVERT ℄ PROCESS WATER LINE (2) GAS LINE (1) EX. LOW MAINTENANCE ROAD ℄ OVERHEAD POWER POLE AND GUY WIRES (HOLY CROSS) EX. CULVERT ℄ EX. FENCE EX. FENCE EX. FENCE EX. EPHEMERAL DITCH EX. EPHEMERAL DITCH EX. EPHEMERAL DITCH EX. EPHEMERAL DITCH EX. EPHEMERAL DITCH EX. EPHEMERAL DITCH EX. CONCRETE PAD (USE UNKNOWN) PROPOSED LAYDOWN AREA (176,228 SF) 20' EX. ACCESS ROAD (EX RD TO BE IMPROVED) 20' ACCESS ROAD EX. ACCESS ROAD EX. ACCESS ROAD 12' EX. PERIMETER ACCESS ROAD 12' EX. PERIMETER ACCESS ROAD (EX. ROAD TO BE IMPROVED ) 20' EX. ACCESS ROAD (EX. ROAD TO BE IMPROVED) EX. ACCESS ROAD EX. ACCESS ROAD EX. ACCESS ROAD 12' PERIMETER ACCESS ROAD 12' PERIMETER ACCESS ROAD 12' PERIMETER ACCESS ROAD 12' PERIMETER ACCESS ROAD 12' PERIMETER ACCESS ROAD 20' ACCESS ROAD 20' ACCESS ROAD 12' PERIMETER ACCESS ROAD (EX. FIELD RD TO BE IMPROVED - AS NEEDED) 12' EX. PERIMETER ACCESS ROAD 20' ACCESS ROAD MIN. 48" GAS LINE COVERAGE REQURED MIN. 48" GAS LINE COVERAGE REQUIRED IPOP IPOP DATE PROJECT TITLE: DESCRIPTION APV: PROJECT LOCATION: NO. KEY PLAN: PE STAMP: REVISIONS: SHEET NO:REV: SCALE AT 24" x 36": CHK: DWN: DES: DATE: PROJNUM: SHEET TITLE & DESCRIPTION: 2180 South 1300 East, Suite 600 Salt Lake City, UT 84106-2749 (801) 679 - 3500 ELECTRIC POWER ENGINEERING, INC. 12600 W. COLFAX AVE, STE. C500 LAKEWOOD, CO 80215 (303) 431-7895 www.neieng.com 0 75'150'225'300' 1" = 150' GRADING & EROSION CONTROL PLAN ---- PRELIMINARY NOT FOR CONSTRUCTION FOR REVIEW & APPROVAL ONLY N GENERAL LEGEND BMP LEGEND EXISTING FEATURES PROPOSED FEATURES PROPOSED ACCESS ROAD LoD PROPOSED DISTURBANCE LIMITS PROPOSED SECURITY FENCE PROPOSED CONSTRUCTION LAYDOWN AREA PROPOSED EQUIPMENT PAD EXISTING PARCEL LINE EXISTING FENCE EXISTING EASEMENT EXISTING POWER POLE EXISTING ROAD CENTERLINE EXISTING TREE LINE EXISTING OVERHEAD POWER PROPOSED CULVERT W EXISTING PROCESS WATERLINE G EXISTING GASLINE EXISTING MAJOR CONTOUR EXISTING MINOR CONTOUR PROPOSED MAJOR CONTOUR PROPOSED MINOR CONTOUR SF SILT FENCE SCL SEDIMENT CONTROL LOG CWA CONCRETE WASHOUT AREA VTC VEHICLE TRACKING CONTROL TSS TOP SOIL STOCKPILE SFO SILT FENCE OUTLET 1.SITE CLEARING AND GRUBBING IS EXPECTED WITHIN SOLAR ARRAY PROJECT BOUNDARY AREA. 2.FINAL GRADING DESIGN NOT INCLUDED IN 30% DESIGN. 3.FIBER ROLLS AND SLOPE MATTING BEST MANAGEMENT PRACTICES SHOULD BE UTILIZED IF APPLICABLE WHEN FINAL GRADING AND EROSION CONTROL DESIGN IS COMPLETE. 4.PROJECT AND BMP PHASING SHALL BE USED DURING CONSTRUCTION TO LIMIT AND REDUCE SEDIMENT AND EROSION CONTROL. 5.ROCK OUTLETS SHOULD BE UTILIZED IN FINAL EROSION CONTROL DESIGN. 6.EPHEMERAL DITCHES SHOWN AS PROVIDED BY AES. 7.ELECTRICAL FEATURES ARE SHOWN HERE FOR ILLUSTRATIVE PURPOSES ONLY. GESC NOTES 5530 5530 5531 PL O T T E D : 6/ 2 7 / 2 0 2 3 1 0 : 1 2 A M H: \ P r o j e c t \ 4 0 0 0 \ 4 0 8 4 . 0 0 1 - E a g l e S p r i n g s P V B E S S - 3 0 p c t P V B E S S - A E S \ 4 _ D W G s \ 2 _ N E I \ S o l a r \ P V C I V \ P V - C . 0 6 . 0 1 G R A D I N G & E R O S I O N . d w g XR E F s : . . \ . . \ 2 _ S h e e t s e t R e f e r e n c e s \ A E S T i t l e b l o c k O u t l i n e . d w g ; . . \ . . \ 2 _ S h e e t s e t R e f e r e n c e s \ E S P R 1 - A R R A Y S - 4 5 % . d w g ; . . \ . . \ 2 _ S h e e t s e t R e f e r e n c e s \ C I V I L . d w g ; . . \ . . \ 2 _ S h e e t s e t R e f e r e n c e s \ E S P R 1 - E A G L E S P R I N G S _ R E V 2 . d w g ; H : \ P r o j e c t \ 3 8 0 0 \ 3 8 0 3 . 0 0 1 N o r t h u m b e r l a n d S o l a r - I E A \ D r a w i n g s \ _ N E I \ _ R e f e r e n c e s \ P R - P L A N . d w g ; . \ P V - C . 0 3 . 0 2 C I V I L S I T E P L A N . d w g ; . . \ . . \ 2 _ S h e e t s e t R e f e r e n c e s \ C I V I L - C O N S T R A I N T S . d w g AE S T i t l e b l o c k 2 4 X 3 6 v 2 1 0 2 0 9 EAGLE SPRINGS ORGANIC SILT, CO 4084.001 JPD JPD BC BC 6/21/23 PV-C.06.01 E A 1/23/23 30% SUBMITTAL B 2/16/23 30% RESUBMITTAL C 3/17/23 30% RESUBMITTAL D 3/29/23 30% RESUBMITTAL E 6/21/23 30% RESUBMITTAL --- --- --- OP OUTLET PROTECTION SF PROPOSED SILT FENCE SCL PROPOSED SEDIMENT CONTROL LOG GL GLGLGLGLGL GL GL GL GL GL GL PROPOSED CUT GL GLGLGLGLGL GL GL GL GL GL GL PROPOSED FILL ARRAY GRADING CRITERIA: ·CUT FACTOR: 1.0 ·FILL FACTOR: 1.15 ·GRADING REVEAL WINDOW: 8" ·MAX E-W SLOPE: 10% ·MAX N-S SLOPE: 5% NOTES: ·CUT/FILL QUANTITIES LISTED ARE RAW QUANTITIES AND DO NOT ACCOUNT FOR SITE EXCAVATIONS OR ANY UTILITY EXCAVATIONS. THE QUANTITIES SHOWN WERE DETERMINED USING THE ANTICIPATED GRADES AS SHOWN ON THE SITE PLAN AND ARE FOR ESTIMATING PURPOSES ONLY. ·GRADING DOES NOT INCLUDE SEDIMENT AND RUNOFF CONTROL OR INTERCONNECTION AREA GRADING. IP INTLET PROTECTION EXISTING DITCH neiengineering.com + 303-431-7895 12600 W Colfax Avenue, Suite C500, Lakewood, CO 80215 To: Joshua Mayer AES Clean Energy The AES Corporation 282 Century Place, Suite 2000 Louisville, CO 80027 From: NEI Electric Power Engineering, Inc. 12600 W Colfax Avenue, Suite C500 Lakewood, CO 80215 Date: July 12, 2023 Project Name: Eagle Springs Solar Project No.: 4084.001 Subject: Stormwater Memo (30% Review) Eagle Springs Solar is a proposed solar facility located near County Road 315 and 346, Garfield County, approximately 1 mile east of the Rifle Garfield County Airport. Disturbed area of this project will be limited to approximately 68.0 acres of the 301-acre lot. The project is expected to change approximately 64,843 sq-ft (1.49 ac; 2.19% lot coverage) of pervious area into impervious area. The impervious area will consist of four (4) concrete equipment pads, two (2) gravel access roads, and foundations for solar arrays. Onsite drainage patterns will be maintained with exception to minor grading related to proposed gravel roads; there a Drainage Report is not required per county standards. This memo is intended to provide Garfield County with drainage and land disturbance information with respect to this project. Existing Conditions The project site is mostly developed agricultural fields throughout the property. The undeveloped land cover consists of agriculture fallow, native vegetation, sparse weeds and grasses. The topography consists of rolling hills, plains and mesas. The existing soils on site are primarily type C. The site generally drains from southeast to northwest atop a mesa with approximately 160 ft of topographic relief. Stormwater runoff sheet flows northwest and AES Clean Energy Eagle Springs Solar STORMWATER MANAGEMENT PLAN p. ii collects in dispersed ephemeral ditches. These ditches convey flow northwest into an approximately 1.8 ac. detention basin. This basin discharges to the Last Chance Ditch, thence into Mamm Creek, thence into the Colorado River approximately 1.0 mile northwest of the project site. Proposed Conditions Construction activities associated with the proposed solar facility will affect approximately 68.0 acres onsite. However, much of the disturbed area will involve construction of support structures for solar panel arrays, leaving the surface beneath the panels undeveloped and pervious. This undeveloped area will be seeded with a grass mix to further reduce peak runoff. These solar arrays are not expected to result in a significant creation of impervious area. The project also proposes four (4) concrete equipment pads, an integrated switch gear pad, and gravel access roads. In total, the project will result in the generation of approximately 64,843 sf of impervious area which covers 2.19% of the project site. Grading activities will be localized around the gravel access road and existing drainage patterns will be maintained. Impervious Area Calculations Quantity Area (ft2) Impervious Factor Impervious Area (ft 2) Equipment Pads 3 7,920 1.0 23,760 Equipment Pad with Switchgear 1 11,991 1.0 11,991 Array Piles 3,705 ~0.037 1.0 139 Gravel Access Road 1 72,383 0.4 28,953 Total Area (ft2) 64,843 Total LOD (ft2) 2,961,082 Coverage Ratio 2.19% Table 1 – Impervious Area Calculations A gravel access road will cross existing stormwater conveyances; therefore, the project also proposes three (3) culverts, which will be discussed below. Stormwater Management Strategy Permanent stormwater management is not required for the proposed development. Project area drainage areas are to be maintained and runoff will decrease to due changed land use. The land use is being changed from agricultural row crops to grass cover. Using a grass seed mix to restore all areas of disturbance, stormwater quality will be improved. The seed mix will also decrease the quantity of peak stormwater runoff previously experienced on site. AES Clean Energy Eagle Springs Solar STORMWATER MANAGEMENT PLAN p. iii The pre and post development runoff volumes have been modeled using the TR-55 method in Autodesk’s Storm and Sanitary Analysis. Calculation details can be found in the attachments of this memo. The runoff volumes are as follows: 2-Year Runoff (CFS) 25-Year Runoff (CFS) Existing 16.24 66.15 Proposed 5.90 42.67 Table 2 – Pre & Post Development Basin Runoff Results Flood Zone The project site would be reported on Flood Insurance Rate Map (FIRM) community panel 0802051360B. Currently the panel is not printed, and flood hazard areas are unidentified. However, the project site is approximately 160 and 130 ft above the intermittent creeks to the north and west, respectively. Therefore, this project is not expected to be negatively impacted, nor negatively impact these creeks. Culvert Design This project proposes an access road which intersects existing drainage routes. This crossing requires culverts to maintain drainage through the site. The culverts are designed to convey the 25-yr peak flow from their contributing drainage basin. The 25-yr storm event (4% annual exceedance probability) is the typical design storm for stormwater conveyances per the County’s Land Use & Development Code (2013). The UDFCD’s modified rational method, an allowable reference per CDOT’s Drainage Design Manual (DDM, 2019), was used to quantify the 25-yr peak flow for each culvert’s contributing drainage basin. The following equation is referenced: Q25 =C25 ∙ I25 ∙ A Where Q25 is the 25-yr peak flow (cfs), A is the contributing drainage area (acres), I 25 is the rainfall intensity in inches per hour for a duration equal to the time of concentration, and C 25 is the runoff coefficient from equations based on NRCS soil groups and storm return period. For soil groups C/D, the runoff coefficient was determined from the equation: CC/D = 0.56i + 0.319 (i = % Imperviousness expressed as a decimal) The runoff coefficient, C, used was 0.33 and the rainfall intensity, I, used was 0.502 inches per Hour with a basin Tc of 2 hours. Rainfall depth was derived from “NOAA ATLAS 14 POINT PRECIPITATION FREQUENCY ESTIMATES”. AES Clean Energy Eagle Springs Solar STORMWATER MANAGEMENT PLAN p. iv Existing culverts are constructed of CMP, proposed culverts are to be RCP, which both have a roughness coefficient (n) of 0.012 per the DDM. The results of the hydraulics calculations are shown in Table 3 below. Table 3 – Culvert Sizing Results Summary The project proposes 1.49 ac of impervious area, which consists of concrete equipment pads, gravel access roads, and foundations for solar arrays. This impervious area constitutes 2.19% of the solar development area. The project will not alter existing drainage patterns, thus does not require a drainage report. The proposed access roads will require the installation of three (3) culverts. Initial sizing has been provided and will be refined as the site design develops. Attachments • Hydrology Basin Exhibit • Pre & Post Development SSA ASCII Report W W W W W W W W W W W W W W W W W W W W W W W W 562 5 563 0 563 5 5622 56 2 3 562 4 562 6 562 7 562 8 5629 5 6 3 1 56 3 2 563 3 563 4 5 6 0 5 5 6 0 5 5 6 0 5 56 0 5 5 6 1 0 5 6 1 0 5610 5615 562 0 5625 5 6 3 0 5 6 0 3 5 6 0 3 5 6 0 4 56 0 4 5 6 0 6 560 6 5 6 0 6 5 6 0 7 5607 5 6 0 7 5 6 0 8 5608 5 6 0 8 5 6 0 9 5 6 0 9 5609 5611 5 6 1 1 5 6 1 1 5 6 1 2 56 1 2 5612 56135614 5616 5617 5618 5619 5621 5622 5623 5624 5626 5 6 2 7 5 6 2 8 56 2 9 5 6 3 1 5632 DRAINAGE BASIN 1 (33.08 AC.) DRAINAGE BASIN 2 (0.69 AC.) DRAINAGE BASIN 3 (19.06 AC.) DRAINAGE BASIN 4 (18.36 AC.) DATE PROJECT TITLE: DESCRIPTION APV: PROJECT LOCATION: NO. KEY PLAN: PE STAMP: REVISIONS: SHEET NO:REV: SCALE AT 24" x 36": CHK: DWN: DES: DATE: PROJ NUM: SHEET TITLE & DESCRIPTION: 2180 South 1300 East, Suite 600 Salt Lake City, UT 84106-2749 (801) 679 - 3500 ELECTRIC POWER ENGINEERING, INC. 12600 W. COLFAX AVE, STE. C500 LAKEWOOD, CO 80215 (303) 431-7895 www.neieng.com 0 100'200'300'400' 1" = 200' A 3/29/23 HYDROLOGY_BASIN_EXHIBIT B 7/12/23 HYDROLOGY_BASIN_EXHIBIT --- --- - PL O T T E D : 7/ 1 2 / 2 0 2 3 1 1 : 2 7 A M H: \ P r o j e c t \ 4 0 0 0 \ 4 0 8 4 . 0 0 1 - E a g l e S p r i n g s P V B E S S - 3 0 p c t P V B E S S - A E S \ 4 _ D W G s \ 2 _ N E I \ S o l a r \ P V C I V \ S t o r m w a t e r M e m o E x h i b i t \ D R A I N A G E M E M O E X H I B I T . d w g -- --- --- --- JPD 07/12/2023 EX-1.0 A 4084.001 JJS JJS JPD AE S T i t l e b l o c k 2 4 X 3 6 v 2 1 0 2 0 9 PRELIMINARY NOT FOR CONSTRUCTION FOR REVIEW & APPROVAL ONLY 200'100'0 200'400'600' 1"=200' N LEGEND: MODULE BUILDABLE AREA PARCEL BOUNDARY FENCE SETBACK LINE LoD LIMIT OF DISTURBANCE IRRIGATION LINES FENCE SETBACK LINE W OVERHEAD POWER LINESOHE DRAINAGE BASIN HYDROLOGY BASIN EXHIBIT SILT, CO HYDROLOGY BASIN EXHIBIT CIVIL Autodesk® Storm and Sanitary Analysis 2016 - Version 13.5.302 (Build 0) ----------------------------------------------------------------------------------------- ******************* Project Description ******************* File Name ................. Eagle Springs Hydrology.SPF **************** Analysis Options **************** Flow Units ................ cfs Subbasin Hydrograph Method. SCS TR-55 Time of Concentration...... SCS TR-55 Storage Node Exfiltration.. None Starting Date ............. JUN-28-2023 00:00:00 Ending Date ............... JUN-29-2023 00:00:00 Report Time Step .......... 00:05:00 ************* Element Count ************* Number of rain gages ...... 3 Number of subbasins ....... 1 Number of nodes ........... 1 Number of links ........... 0 **************** Subbasin Summary **************** Subbasin Total Peak Rate Area Factor ID acres ------------------------------------------ Sub-01 128.81 484.00 ************ Node Summary ************ Node Element Invert Maximum Ponded External ID Type Elevation Elev. Area Inflow ft ft ft² ------------------------------------------------------------------------------ Out-01 OUTFALL 0.00 0.00 0.00 ************************** Volume Depth Runoff Quantity Continuity acre-ft inches ************************** --------- ------- Total Precipitation ...... 13.041 1.215 Surface Runoff ........... 0.289 0.027 Continuity Error (%) ..... -0.000 ************************** Volume Volume Flow Routing Continuity acre-ft Mgallons ************************** --------- --------- External Inflow .......... 0.000 0.000 External Outflow ......... 2.883 0.939 Initial Stored Volume .... 0.000 0.000 Final Stored Volume ...... 0.000 0.000 Continuity Error (%) ..... 0.000 Autodesk Storm and Sanitary AnalysisAutodesk Storm and Sanitary Analysis ****************************************** Composite Curve Number Computations Report ****************************************** ------------------ Subbasin Sub-01 ------------------ Area Soil Soil/Surface Description (acres) Group CN ---------------------------------------------------------------------------------------- Row crops, straight row, Good 128.81 C 85.00 Composite Area & Weighted CN 128.81 85.00 *************************************************** SCS TR-55 Time of Concentration Computations Report *************************************************** Sheet Flow Equation ------------------- Tc = (0.007 * ((n * Lf)^0.8)) / ((P^0.5) * (Sf^0.4)) Where: Tc = Time of Concentration (hrs) n = Manning's Roughness Lf = Flow Length (ft) P = 2 yr, 24 hr Rainfall (inches) Sf = Slope (ft/ft) Shallow Concentrated Flow Equation ---------------------------------- V = 16.1345 * (Sf^0.5) (unpaved surface) V = 20.3282 * (Sf^0.5) (paved surface) V = 15.0 * (Sf^0.5) (grassed waterway surface) V = 10.0 * (Sf^0.5) (nearly bare & untilled surface) V = 9.0 * (Sf^0.5) (cultivated straight rows surface) V = 7.0 * (Sf^0.5) (short grass pasture surface) V = 5.0 * (Sf^0.5) (woodland surface) V = 2.5 * (Sf^0.5) (forest w/heavy litter surface) Tc = (Lf / V) / (3600 sec/hr) Where: Tc = Time of Concentration (hrs) Lf = Flow Length (ft) V = Velocity (ft/sec) Sf = Slope (ft/ft) Channel Flow Equation --------------------- V = (1.49 * (R^(2/3)) * (Sf^0.5)) / n R = Aq / Wp Tc = (Lf / V) / (3600 sec/hr) Where: Tc = Time of Concentration (hrs) Lf = Flow Length (ft) R = Hydraulic Radius (ft) Aq = Flow Area (ft²) Wp = Wetted Perimeter (ft) Autodesk Storm and Sanitary AnalysisAutodesk Storm and Sanitary Analysis V = Velocity (ft/sec) Sf = Slope (ft/ft) n = Manning's Roughness ------------------ Subbasin Sub-01 ------------------ Sheet Flow Computations ----------------------- Subarea A Subarea B Subarea C Manning's Roughness: 0.20 0.00 0.00 Flow Length (ft): 100.00 0.00 0.00 Slope (%): 2.50 0.00 0.00 2 yr, 24 hr Rainfall (in): 1.20 1.20 1.20 Velocity (ft/sec): 0.09 0.00 0.00 Computed Flow Time (minutes): 18.42 0.00 0.00 Shallow Concentrated Flow Computations -------------------------------------- Subarea A Subarea B Subarea C Flow Length (ft): 3464.00 0.00 0.00 Slope (%): 2.50 0.00 0.00 Surface Type: Straight rows Unpaved Unpaved Velocity (ft/sec): 1.42 0.00 0.00 Computed Flow Time (minutes): 40.66 0.00 0.00 ================================================================================================ Total TOC (minutes): 59.08 ================================================================================================ *********************** Subbasin Runoff Summary *********************** -------------------------------------------------------------------------- Subbasin Total Total Peak Weighted Time of ID Precip Runoff Runoff Curve Concentration in in cfs Number days hh:mm:ss -------------------------------------------------------------------------- Sub-01 1.20 0.28 16.24 85.000 0 00:59:04 -------------------------------------------------------------------------- Analysis began on: Wed Jun 28 15:15:41 2023 Analysis ended on: Wed Jun 28 15:15:42 2023 Total elapsed time: 00:00:01 Autodesk Storm and Sanitary AnalysisAutodesk Storm and Sanitary Analysis Autodesk® Storm and Sanitary Analysis 2016 - Version 13.5.302 (Build 0) ----------------------------------------------------------------------------------------- ******************* Project Description ******************* File Name ................. Eagle Springs Hydrology.SPF **************** Analysis Options **************** Flow Units ................ cfs Subbasin Hydrograph Method. SCS TR-55 Time of Concentration...... SCS TR-55 Storage Node Exfiltration.. None Starting Date ............. JUN-28-2023 00:00:00 Ending Date ............... JUN-29-2023 00:00:00 Report Time Step .......... 00:05:00 ************* Element Count ************* Number of rain gages ...... 3 Number of subbasins ....... 1 Number of nodes ........... 1 Number of links ........... 0 **************** Subbasin Summary **************** Subbasin Total Peak Rate Area Factor ID acres ------------------------------------------ Sub-01 128.81 484.00 ************ Node Summary ************ Node Element Invert Maximum Ponded External ID Type Elevation Elev. Area Inflow ft ft ft² ------------------------------------------------------------------------------ Out-01 OUTFALL 0.00 0.00 0.00 ************************** Volume Depth Runoff Quantity Continuity acre-ft inches ************************** --------- ------- Total Precipitation ...... 23.908 2.227 Surface Runoff ........... 0.998 0.093 Continuity Error (%) ..... -0.000 ************************** Volume Volume Flow Routing Continuity acre-ft Mgallons ************************** --------- --------- External Inflow .......... 0.000 0.000 External Outflow ......... 9.969 3.249 Initial Stored Volume .... 0.000 0.000 Final Stored Volume ...... 0.000 0.000 Continuity Error (%) ..... 0.000 Autodesk Storm and Sanitary AnalysisAutodesk Storm and Sanitary Analysis ****************************************** Composite Curve Number Computations Report ****************************************** ------------------ Subbasin Sub-01 ------------------ Area Soil Soil/Surface Description (acres) Group CN ---------------------------------------------------------------------------------------- Row crops, straight row, Good 128.81 C 85.00 Composite Area & Weighted CN 128.81 85.00 *************************************************** SCS TR-55 Time of Concentration Computations Report *************************************************** Sheet Flow Equation ------------------- Tc = (0.007 * ((n * Lf)^0.8)) / ((P^0.5) * (Sf^0.4)) Where: Tc = Time of Concentration (hrs) n = Manning's Roughness Lf = Flow Length (ft) P = 2 yr, 24 hr Rainfall (inches) Sf = Slope (ft/ft) Shallow Concentrated Flow Equation ---------------------------------- V = 16.1345 * (Sf^0.5) (unpaved surface) V = 20.3282 * (Sf^0.5) (paved surface) V = 15.0 * (Sf^0.5) (grassed waterway surface) V = 10.0 * (Sf^0.5) (nearly bare & untilled surface) V = 9.0 * (Sf^0.5) (cultivated straight rows surface) V = 7.0 * (Sf^0.5) (short grass pasture surface) V = 5.0 * (Sf^0.5) (woodland surface) V = 2.5 * (Sf^0.5) (forest w/heavy litter surface) Tc = (Lf / V) / (3600 sec/hr) Where: Tc = Time of Concentration (hrs) Lf = Flow Length (ft) V = Velocity (ft/sec) Sf = Slope (ft/ft) Channel Flow Equation --------------------- V = (1.49 * (R^(2/3)) * (Sf^0.5)) / n R = Aq / Wp Tc = (Lf / V) / (3600 sec/hr) Where: Tc = Time of Concentration (hrs) Lf = Flow Length (ft) R = Hydraulic Radius (ft) Aq = Flow Area (ft²) Wp = Wetted Perimeter (ft) Autodesk Storm and Sanitary AnalysisAutodesk Storm and Sanitary Analysis V = Velocity (ft/sec) Sf = Slope (ft/ft) n = Manning's Roughness ------------------ Subbasin Sub-01 ------------------ Sheet Flow Computations ----------------------- Subarea A Subarea B Subarea C Manning's Roughness: 0.20 0.00 0.00 Flow Length (ft): 100.00 0.00 0.00 Slope (%): 2.50 0.00 0.00 2 yr, 24 hr Rainfall (in): 1.20 1.20 1.20 Velocity (ft/sec): 0.09 0.00 0.00 Computed Flow Time (minutes): 18.42 0.00 0.00 Shallow Concentrated Flow Computations -------------------------------------- Subarea A Subarea B Subarea C Flow Length (ft): 3464.00 0.00 0.00 Slope (%): 2.50 0.00 0.00 Surface Type: Straight rows Unpaved Unpaved Velocity (ft/sec): 1.42 0.00 0.00 Computed Flow Time (minutes): 40.66 0.00 0.00 ================================================================================================ Total TOC (minutes): 59.08 ================================================================================================ *********************** Subbasin Runoff Summary *********************** -------------------------------------------------------------------------- Subbasin Total Total Peak Weighted Time of ID Precip Runoff Runoff Curve Concentration in in cfs Number days hh:mm:ss -------------------------------------------------------------------------- Sub-01 2.20 0.94 66.15 85.000 0 00:59:04 -------------------------------------------------------------------------- Analysis began on: Wed Jun 28 15:16:14 2023 Analysis ended on: Wed Jun 28 15:16:15 2023 Total elapsed time: 00:00:01 Autodesk Storm and Sanitary AnalysisAutodesk Storm and Sanitary Analysis Autodesk® Storm and Sanitary Analysis 2016 - Version 13.5.302 (Build 0) ----------------------------------------------------------------------------------------- ******************* Project Description ******************* File Name ................. Eagle Springs Hydrology - Proposed.SPF **************** Analysis Options **************** Flow Units ................ cfs Subbasin Hydrograph Method. SCS TR-55 Time of Concentration...... SCS TR-55 Storage Node Exfiltration.. None Starting Date ............. JUN-28-2023 00:00:00 Ending Date ............... JUN-29-2023 00:00:00 Report Time Step .......... 00:05:00 ************* Element Count ************* Number of rain gages ...... 3 Number of subbasins ....... 1 Number of nodes ........... 1 Number of links ........... 0 **************** Subbasin Summary **************** Subbasin Total Peak Rate Area Factor ID acres ------------------------------------------ Sub-01 128.81 484.00 ************ Node Summary ************ Node Element Invert Maximum Ponded External ID Type Elevation Elev. Area Inflow ft ft ft² ------------------------------------------------------------------------------ Out-01 OUTFALL 0.00 0.00 0.00 ************************** Volume Depth Runoff Quantity Continuity acre-ft inches ************************** --------- ------- Total Precipitation ...... 13.041 1.215 Surface Runoff ........... 0.146 0.014 Continuity Error (%) ..... -0.000 ************************** Volume Volume Flow Routing Continuity acre-ft Mgallons ************************** --------- --------- External Inflow .......... 0.000 0.000 External Outflow ......... 1.461 0.476 Initial Stored Volume .... 0.000 0.000 Final Stored Volume ...... 0.000 0.000 Continuity Error (%) ..... 0.000 Autodesk Storm and Sanitary AnalysisAutodesk Storm and Sanitary Analysis ****************************************** Composite Curve Number Computations Report ****************************************** ------------------ Subbasin Sub-01 ------------------ Area Soil Soil/Surface Description (acres) Group CN ---------------------------------------------------------------------------------------- Row crops, straight row, Good 59.52 C 85.00 Imperv-areas 1.34 - 98.00 > 75% grass cover, Good 67.95 C 74.00 Composite Area & Weighted CN 128.81 79.33 *************************************************** SCS TR-55 Time of Concentration Computations Report *************************************************** Sheet Flow Equation ------------------- Tc = (0.007 * ((n * Lf)^0.8)) / ((P^0.5) * (Sf^0.4)) Where: Tc = Time of Concentration (hrs) n = Manning's Roughness Lf = Flow Length (ft) P = 2 yr, 24 hr Rainfall (inches) Sf = Slope (ft/ft) Shallow Concentrated Flow Equation ---------------------------------- V = 16.1345 * (Sf^0.5) (unpaved surface) V = 20.3282 * (Sf^0.5) (paved surface) V = 15.0 * (Sf^0.5) (grassed waterway surface) V = 10.0 * (Sf^0.5) (nearly bare & untilled surface) V = 9.0 * (Sf^0.5) (cultivated straight rows surface) V = 7.0 * (Sf^0.5) (short grass pasture surface) V = 5.0 * (Sf^0.5) (woodland surface) V = 2.5 * (Sf^0.5) (forest w/heavy litter surface) Tc = (Lf / V) / (3600 sec/hr) Where: Tc = Time of Concentration (hrs) Lf = Flow Length (ft) V = Velocity (ft/sec) Sf = Slope (ft/ft) Channel Flow Equation --------------------- V = (1.49 * (R^(2/3)) * (Sf^0.5)) / n R = Aq / Wp Tc = (Lf / V) / (3600 sec/hr) Where: Tc = Time of Concentration (hrs) Lf = Flow Length (ft) R = Hydraulic Radius (ft) Autodesk Storm and Sanitary AnalysisAutodesk Storm and Sanitary Analysis Aq = Flow Area (ft²) Wp = Wetted Perimeter (ft) V = Velocity (ft/sec) Sf = Slope (ft/ft) n = Manning's Roughness ------------------ Subbasin Sub-01 ------------------ Sheet Flow Computations ----------------------- Subarea A Subarea B Subarea C Manning's Roughness: 0.20 0.00 0.00 Flow Length (ft): 100.00 0.00 0.00 Slope (%): 2.50 0.00 0.00 2 yr, 24 hr Rainfall (in): 1.20 1.20 1.20 Velocity (ft/sec): 0.09 0.00 0.00 Computed Flow Time (minutes): 18.42 0.00 0.00 Shallow Concentrated Flow Computations -------------------------------------- Subarea A Subarea B Subarea C Flow Length (ft): 3464.00 0.00 0.00 Slope (%): 2.50 0.00 0.00 Surface Type: Straight rows Unpaved Unpaved Velocity (ft/sec): 1.42 0.00 0.00 Computed Flow Time (minutes): 40.66 0.00 0.00 ================================================================================================ Total TOC (minutes): 59.08 ================================================================================================ *********************** Subbasin Runoff Summary *********************** -------------------------------------------------------------------------- Subbasin Total Total Peak Weighted Time of ID Precip Runoff Runoff Curve Concentration in in cfs Number days hh:mm:ss -------------------------------------------------------------------------- Sub-01 1.20 0.14 5.90 79.330 0 00:59:04 -------------------------------------------------------------------------- Analysis began on: Wed Jun 28 15:12:53 2023 Analysis ended on: Wed Jun 28 15:12:54 2023 Total elapsed time: 00:00:01 Autodesk Storm and Sanitary AnalysisAutodesk Storm and Sanitary Analysis Autodesk® Storm and Sanitary Analysis 2016 - Version 13.5.302 (Build 0) ----------------------------------------------------------------------------------------- ******************* Project Description ******************* File Name ................. Eagle Springs Hydrology - Proposed.SPF **************** Analysis Options **************** Flow Units ................ cfs Subbasin Hydrograph Method. SCS TR-55 Time of Concentration...... SCS TR-55 Storage Node Exfiltration.. None Starting Date ............. JUN-28-2023 00:00:00 Ending Date ............... JUN-29-2023 00:00:00 Report Time Step .......... 00:05:00 ************* Element Count ************* Number of rain gages ...... 3 Number of subbasins ....... 1 Number of nodes ........... 1 Number of links ........... 0 **************** Subbasin Summary **************** Subbasin Total Peak Rate Area Factor ID acres ------------------------------------------ Sub-01 128.81 484.00 ************ Node Summary ************ Node Element Invert Maximum Ponded External ID Type Elevation Elev. Area Inflow ft ft ft² ------------------------------------------------------------------------------ Out-01 OUTFALL 0.00 0.00 0.00 ************************** Volume Depth Runoff Quantity Continuity acre-ft inches ************************** --------- ------- Total Precipitation ...... 23.908 2.227 Surface Runoff ........... 0.693 0.065 Continuity Error (%) ..... -0.000 ************************** Volume Volume Flow Routing Continuity acre-ft Mgallons ************************** --------- --------- External Inflow .......... 0.000 0.000 External Outflow ......... 6.921 2.255 Initial Stored Volume .... 0.000 0.000 Final Stored Volume ...... 0.000 0.000 Continuity Error (%) ..... 0.000 Autodesk Storm and Sanitary AnalysisAutodesk Storm and Sanitary Analysis ****************************************** Composite Curve Number Computations Report ****************************************** ------------------ Subbasin Sub-01 ------------------ Area Soil Soil/Surface Description (acres) Group CN ---------------------------------------------------------------------------------------- Row crops, straight row, Good 59.52 C 85.00 Imperv-areas 1.34 - 98.00 > 75% grass cover, Good 67.95 C 74.00 Composite Area & Weighted CN 128.81 79.33 *************************************************** SCS TR-55 Time of Concentration Computations Report *************************************************** Sheet Flow Equation ------------------- Tc = (0.007 * ((n * Lf)^0.8)) / ((P^0.5) * (Sf^0.4)) Where: Tc = Time of Concentration (hrs) n = Manning's Roughness Lf = Flow Length (ft) P = 2 yr, 24 hr Rainfall (inches) Sf = Slope (ft/ft) Shallow Concentrated Flow Equation ---------------------------------- V = 16.1345 * (Sf^0.5) (unpaved surface) V = 20.3282 * (Sf^0.5) (paved surface) V = 15.0 * (Sf^0.5) (grassed waterway surface) V = 10.0 * (Sf^0.5) (nearly bare & untilled surface) V = 9.0 * (Sf^0.5) (cultivated straight rows surface) V = 7.0 * (Sf^0.5) (short grass pasture surface) V = 5.0 * (Sf^0.5) (woodland surface) V = 2.5 * (Sf^0.5) (forest w/heavy litter surface) Tc = (Lf / V) / (3600 sec/hr) Where: Tc = Time of Concentration (hrs) Lf = Flow Length (ft) V = Velocity (ft/sec) Sf = Slope (ft/ft) Channel Flow Equation --------------------- V = (1.49 * (R^(2/3)) * (Sf^0.5)) / n R = Aq / Wp Tc = (Lf / V) / (3600 sec/hr) Where: Tc = Time of Concentration (hrs) Lf = Flow Length (ft) R = Hydraulic Radius (ft) Autodesk Storm and Sanitary AnalysisAutodesk Storm and Sanitary Analysis Aq = Flow Area (ft²) Wp = Wetted Perimeter (ft) V = Velocity (ft/sec) Sf = Slope (ft/ft) n = Manning's Roughness ------------------ Subbasin Sub-01 ------------------ Sheet Flow Computations ----------------------- Subarea A Subarea B Subarea C Manning's Roughness: 0.20 0.00 0.00 Flow Length (ft): 100.00 0.00 0.00 Slope (%): 2.50 0.00 0.00 2 yr, 24 hr Rainfall (in): 1.20 1.20 1.20 Velocity (ft/sec): 0.09 0.00 0.00 Computed Flow Time (minutes): 18.42 0.00 0.00 Shallow Concentrated Flow Computations -------------------------------------- Subarea A Subarea B Subarea C Flow Length (ft): 3464.00 0.00 0.00 Slope (%): 2.50 0.00 0.00 Surface Type: Straight rows Unpaved Unpaved Velocity (ft/sec): 1.42 0.00 0.00 Computed Flow Time (minutes): 40.66 0.00 0.00 ================================================================================================ Total TOC (minutes): 59.08 ================================================================================================ *********************** Subbasin Runoff Summary *********************** -------------------------------------------------------------------------- Subbasin Total Total Peak Weighted Time of ID Precip Runoff Runoff Curve Concentration in in cfs Number days hh:mm:ss -------------------------------------------------------------------------- Sub-01 2.20 0.66 42.67 79.330 0 00:59:04 -------------------------------------------------------------------------- Analysis began on: Wed Jun 28 15:13:20 2023 Analysis ended on: Wed Jun 28 15:13:21 2023 Total elapsed time: 00:00:01 Autodesk Storm and Sanitary AnalysisAutodesk Storm and Sanitary Analysis