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Home My WebLink About20210289 Ver 1_Pre-Filing Meeting Request_20210209ID#* 20210289 Version* 1 Regional Office* Washington Regional Office - (252) 946-6481 Reviewer List* Robert Tankard Pre -Filing Meeting Request submitted 2/9/2021 Contact Name * Jeffery McDermott Contact Email Address* jeffrey.mcdermott@sunenergy1.com Project Name* Colice Hall Solar Project Owner* Colice Hall Solar, LLC Project County* Hertford Owner Address: Street Address 192 Raceway Drive Address Line 2 aty State / Frovince / Region Mooresvillle NC Rbstal / Zip Code Country 28117 United States Is this a transportation project?* r Yes r No Type(s) of approval sought from the DWR: W 401 Water Quality Certification - F- 401 Water Quality Certification - Regular Express r- Individual Permit r- Modification r- Shoreline Stabilization Does this project have an existing project ID#?* r Yes r No Please list all existing project ID's associated with this projects.* SAW-2020-01253 Do you know the name of the staff member you would like to request a meeting with? Chris Pullinger Please give a brief project description below.* The proposed solar site is in Hertford county, located off of Colice Hall Lane. The project parcels encompass approximately 54 acres. The parcels are owned by John David Simons III, Russel P Harrell, and Byrum's Farm Service Center, Inc. Please give a couple of dates you are available for a meeting. 2/16/2021 2/17/2021 2/18/2021 2/11 /2021 2/23/2021 Please attach the documentation you would like to have the meeting about. 08499a - Colice Hall Solar Wetland Crossing 1.03MB Documents - 2021-02-08.pdf 08499a - Colice Hall Solar Wetland Crossing 766.26KB Drawings - 2021-02-08.pdf pdf only By digitally signing below, I certify that I have read and understood that per the Federal Clean Water Act Section 401 Certification Rule the following statements: • This form completes the requirement of the Pre -Filing Meeting Request in the Clean Water Act Section 401 Certification Rule. 1 understand by signing this form that I cannot submit my application until 30 calendar days after this pre -filing meeting request. 1 also understand that DWR is not required to respond or grant the meeting request. Your project's thirty -day clock started upon receipt of this application. You will receive notification regarding meeting location and time if a meeting is necessary. You will receive notification when the thirty -day clock has expired, and you can submit an application. Signature OAS 0, Submittal Date 2/9/2021 Land Planning – Engineering – Surveying – Environmental – Construction Management P.O. Box 3989, 115 W. Saint Clair St., Kill Devil Hills, North Carolina 27948 Phone: 252-441-2113 www.AlbemarleAssociates.com Fax: 252-441-0965 Colice Hall Solar Summary of Analysis of Horse Swamp / Wetland Crossing February 8, 2021 The Colice Hall Solar Farm consists of two parcels of land, with the north parcel having access via roadway frontage on East Modlin Road (SR1130) and the south parcel being accessible by Colice Hall Lane. The two parcels are separated by a wooded wetland area surrounding a drainage ditch named “Horse Swamp”. Colice Hall Lane is a narrow (14’ wide) gravel drive with obstructions on either side of the access along US13 which make it not accessible by larger vehicles needed to construct and maintain the solar farm. Therefore, in order to facilitate overhead transmission lines and access between the south and north parcel a 26’ wide access road is required to cross a wetland area and Horse Swamp. The crossing has been designed to minimize wetland impacts while maintaining drainage. Horse Swamp runs along the northwest edge of the south parcel with the upstream extending west across NC11 and collecting runoff from the land bounded by NC11, SR1106 and SR1130. Based upon USGS maps, aerial photography and the delineation of the drainage area for Horse Swamp in the Hertford County GIS maps, the contributing drainage area is approximately 1062 acres at the location the crossing will be provided. Due to the large drainage area, the SCS TR-55 method was used to estimate the peak flow for a 10-year rainfall event which is calculated to be 190 cfs. This was calculated considering soil types and land uses to determine the curve number (CN=80). Two 60” HDPE culverts are being provided within Horse Swamp to allow for a hydraulic connection within the ditch beneath the access road based upon the hydraulic analysis using HY-8. This analysis indicates the culvert can pass the 10-yr rainfall event without overtopping the top of the access route. I spoke with Michael Hill within the NCDOT District 2 Resident Engineer’s Office in Ahoskie and he indicated that the NC11 culvert crossing upstream of this location consisted of (3) 42” culverts while the US13 crossing downstream had (2) 60” culverts, thus providing confirmation of the culvert sizing. The outlet velocity is calculated to be 5.67 ft/sec and thus rip-rap should be provided for long term stabilization. The culvert invert is to be placed 12” below the bottom of the ditch as required for culverts 48” or larger under Nationwide Permits. Attached support data for this report includes: · Drainage Area Soils Map and Table · Weighted CN Calculations · Time of Concentration Calculations · Peak Discharge Calculations (10 year & 25 year) · HY-8 Summary Table Soil Map—Hertford County, North Carolina (Colice Hall Wetland Crossing Drainage Area) Natural Resources Conservation Service Web Soil Survey National Cooperative Soil Survey 2/2/2021 Page 1 of 34019300401970040201004020500402090040213004021700402210040193004019700402010040205004020900402130040217004022100317200317600318000318400318800319200319600320000320400320800321200321600 317200 317600 318000 318400 318800 319200 319600 320000 320400 320800 321200 321600 36° 19' 39'' N 77° 2' 15'' W36° 19' 39'' N76° 59' 10'' W36° 18' 2'' N 77° 2' 15'' W36° 18' 2'' N 76° 59' 10'' WN Map projection: Web Mercator Corner coordinates: WGS84 Edge tics: UTM Zone 18N WGS84 0 1000 2000 4000 6000 Feet 0 300 600 1200 1800 Meters Map Scale: 1:21,100 if printed on A landscape (11" x 8.5") sheet. Map Unit Legend Map Unit Symbol Map Unit Name Acres in AOI Percent of AOI CaA Caroline fine sandy loam, 0 to 2 percent slopes 145.1 13.0% CaB Caroline fine sandy loam, 2 to 6 percent slopes 26.5 2.4% CrA Craven fine sandy loam, 0 to 1 percent slopes 85.4 7.7% CrB Craven fine sandy loam, 1 to 4 percent slopes 9.9 0.9% CsA Craven-Urban land complex, 0 to 2 percent slopes 2.4 0.2% GoA Goldsboro fine sandy loam, 0 to 2 percent slopes 4.7 0.4% LF Leaf loam 817.7 73.4% Ln Lenoir loam 22.6 2.0% Totals for Area of Interest 1,114.4 100.0% Soil Map—Hertford County, North Carolina Colice Hall Wetland Crossing Drainage Area Natural Resources Conservation Service Web Soil Survey National Cooperative Soil Survey 2/2/2021 Page 3 of 3 Colice Hall Solar Horse Swamp / Wetland Crossing Drainage Area Curve Number total area 1062 ac Soil Group Land Use CN % CaA C farm 88 13.0%11.44 CaB C farm 88 2.4%2.112 CrA C farm 88 7.7%6.776 CrB C farm 88 0.9%0.792 CsA C industrial 91 0.2%0.182 GoA B woods (good)55 0.4%0.22 LF D woods (good)77 73.4%56.518 Ln C residential (1/2)80 2.0%1.54 100.0%79.58 TR55 Tc Worksheet Hydraflow Express by Intelisolve SCS Colice Hall Solar - Horse Swamp Crossing Description A B C Totals Sheet Flow Manning's n-value = 0.800 0.011 0.011 Flow length (ft) = 300.0 0.0 0.0 Two-year 24-hr precip. ((in)) = 3.57 0.00 0.00 Land slope (%) = 0.08 0.00 0.00 Travel Time (min) = 308.92 + 0.00 + 0.00 = 308.92 Shallow Concentrated Flow Flow length (ft) = 430.00 0.00 0.00 Watercourse slope (%) = 0.08 0.00 0.00 Surface description = Unpaved Paved Paved Average velocity (ft/s) = 0.46 0.00 0.00 Travel Time (min) = 15.70 + 0.00 + 0.00 = 15.70 Channel Flow X sectional flow area ((sqft)) = 676.00 5625.00 0.00 Wetted perimeter ((ft)) = 13.60 26.90 0.00 Channel slope (%) = 0.07 0.15 0.00 Manning's n-value = 0.045 0.045 0.015 Velocity (ft/s) = 1.35 2.55 0.00 Flow length (ft) = 5650.0 7340.0 0.0 Travel Time (min) = 69.63 + 47.99 + 0.00 = 117.62 Total Travel Time, Tc .............................................................................. 442.00 min Hydrology Report Hydraflow Express by Intelisolve Friday, Feb 5 2021, 10:32 AM Colice Hall Solar - Horse Swamp Crossing Hydrograph type = SCS Peak discharge (cfs) = 190.23 Storm frequency (yrs) = 10 Time interval (min) = 1 Drainage area (ac) = 1062.000 Curve number (CN) = 79 Basin Slope (%)= See Worksheet Hydraulic length (ft)= See Worksheet Tc method = TR55 Time of conc. (min) = 442 Total precip. (in) = 5.48 Storm Distribution = Type III Storm duration (hrs) = 24 Shape factor = 200 Hydrograph Volume = 12,401,300 (cuft); 284.695 (acft) 0.0 5.0 10.0 15.0 20.0 25.0 30.0 35.0 40.0 45.0 50.0 Q (cfs) 0.00 0.00 30.00 30.00 60.00 60.00 90.00 90.00 120.00 120.00 150.00 150.00 180.00 180.00 210.00 210.00 Q (cfs) Time (hrs) Runoff Hydrograph 10-yr frequency Runoff Hyd - Qp = 190.23 (cfs) Hydrology Report Hydraflow Express by Intelisolve Friday, Feb 5 2021, 10:33 AM Colice Hall Solar - Horse Swamp Crossing Hydrograph type = SCS Peak discharge (cfs) = 260.74 Storm frequency (yrs) = 25 Time interval (min) = 1 Drainage area (ac) = 1062.000 Curve number (CN) = 79 Basin Slope (%)= See Worksheet Hydraulic length (ft)= See Worksheet Tc method = TR55 Time of conc. (min) = 442 Total precip. (in) = 6.79 Storm Distribution = Type III Storm duration (hrs) = 24 Shape factor = 200 Hydrograph Volume = 16,922,710 (cuft); 388.492 (acft) 0.0 5.0 10.0 15.0 20.0 25.0 30.0 35.0 40.0 45.0 50.0 Q (cfs) 0.00 0.00 40.00 40.00 80.00 80.00 120.00 120.00 160.00 160.00 200.00 200.00 240.00 240.00 280.00 280.00 Q (cfs) Time (hrs) Runoff Hydrograph 25-yr frequency Runoff Hyd - Qp = 260.74 (cfs) HY-8 Analysis Results Customized Table Culvert Crossing: Colice Hall Wetland Crossing Discharge Names Total Discharge (cfs) Culvert Discharge (cfs) Headwater Elevation (ft) Outlet Depth (ft) Tailwater Depth (ft) Outlet Velocity (ft/s) Tailwater Velocity (ft/s) 10 190.00 190.00 43.02 4.00 5.56 5.67 2.96 25 261.00 210.86 44.10 4.00 6.36 6.29 2.94 Albemarle & Associates, Ltd. 115 West St. Clair Street P.O. Box 3989 Kill Devil Hills, NC 27948 Phone: (252) 441-2113 Fax: (252) 441-0965 www.AlbemarleAssociates.com Cert. of Licensure No. C-1027 This document is the PROPERTY of Albemarle & Associates, Ltd. All rights reserved. Any unauthorized use or alteration is prohibited. ACCESS PATH AT WETLANDS PLAN SUN ENERGY 1, LLC COLICE HALL SOLAR Albemarle & Associates, Ltd. 115 West St. Clair Street P.O. Box 3989 Kill Devil Hills, NC 27948 Phone: (252) 441-2113 Fax: (252) 441-0965 www.AlbemarleAssociates.com Cert. of Licensure No. C-1027 This document is the PROPERTY of Albemarle & Associates, Ltd. All rights reserved. Any unauthorized use or alteration is prohibited. ACCESS PATH AT WETLANDS DETAILS SUN ENERGY 1, LLC COLICE HALL SOLAR SEAL028572N O R TH CAROLINAP R OFESSIONALENGINEERMICHAEL J. MORW AY SEAL028572N O R TH CAROLINAP R OFESSIONALENGINEERMICHAEL J. MORW AY K:\Active Projects\08499 - Colice Hall, Ahoskie\Cadd Files\08499A - Sheets.dwg, 2/9/2021 9:55:27 AM Albemarle & Associates, Ltd. 115 West St. Clair Street P.O. Box 3989 Kill Devil Hills, NC 27948 Phone: (252) 441-2113 Fax: (252) 441-0965 www.AlbemarleAssociates.com Cert. of Licensure No. C-1027 This document is the PROPERTY of Albemarle & Associates, Ltd. All rights reserved. Any unauthorized use or alteration is prohibited. ACCESS PATH AT WETLANDS DETAILS SUN ENERGY 1, LLC COLICE HALL SOLAR SEAL028572N O R TH CAROLINAP R OFESSIONALENGINEERMICHAEL J. MORW AY K:\Active Projects\08499 - Colice Hall, Ahoskie\Cadd Files\08499A - Sheets.dwg, 2/9/2021 9:57:20 AM