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HomeMy WebLinkAboutSW5210703_Stormwater Narrative_20210806rE/NFEL OEf7 Bright People. Right Solutions. Re: Phobos Solar, LLC— Phase II The proposed solar site is located in Nash County, North Carolina (north of Middlesex, east of Zebulon, and west of Nashville) at the intersection of Frazier Road and Old Nash Road. The site is currently mixed use as open field used for agriculture and forested. There are isolated wetlands and jurisdictional streams present within the construction area, and there will be stream impacts to incorporate fence crossing. There will be no proposed impact to the wetlands on site. The site generally drains to the wetlands and streams to the central portions of the site. The amount of disturbed acreage permitted for the project site is 884 acres. Clearing and grubbing activities are proposed for this site in limits areas to construct the inverter pads and access road. The actual disturbed area will be much less and limited to the areas required to install proposed access drives, inverters, array piles, and cable trenching. If any rutting or land disturbance occurs on these access drives, it will be stabilized. It is proposed that the site will have temporary rock construction entrance at the driveway access point, temporary sediment basins, temporary diversion ditches and temporary perimeter silt fencing with silt fence outlets placed at the low points for possible discharges. No drainage patterns are being changed with this project. Stormwater will primarily be treated through overland sheet flow across herbaceous ground cover. The total new impervious areas are listed in the attached spreadsheet and will be comprised of gravel access drive and concrete inverter pads. Since the total percentage is less than 24% as listed in the attached spreadsheet, the site is a low -density development. As such, the development will have minimal impact on the downstream properties. 3200 Gateway Centre Blvd, Suite 100, Morrisville, NC 27560 • 919-755-5011 Office • 919-755-1414 • Fax