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HARRISBURG AREA LAND USE PLAN discharge rate from the site to match those of a pre - developed condition for the 1- year and 10 -year storm event. The ordinance also requires the treatment of stormwater to the state standards of 85% total suspended solids (TSS) removal for water quality. New development that will disturb an acre or more of land in Cabarrus County is subject to Post - Construction Stormwater Management permitting requirements administered by North Carolina Department of Environment and Natural Resources (DENR). The permitting program addresses stormwater management practices during site development or redevelopment as well as ongoing maintenance and operation. Within the FEMA - regulated floodplain areas of Harrisburg and Cabarrus County, recently updated mapping indicates that none of the planning area is "unstudied (Zone A);" thus, base flood elevations have been set. The Town of Harrisburg floodplain ordinance requires that no impact to the floodplain be permitted unless a "no rise" analysis is completed for the proposed action. This requirement, combined with the updated stormwater ordinances of both local governments and the stream buffers described in the next paragraph, establishes a high level of stream and floodplain protection in the planning area. The Town of Harrisburg Zoning Ordinance requires perennial streams have a buffer equal to 50' plus 4 times the average slope (up to 120' total) on each side of the (W stream. Intermittent steams have a buffer equal to 35' plus 4 times the average slope (up to 75' total) on each side of the stream. No development, including soil disturbing activities or grading, shall occur within this buffer area. Exceptions do exist for utilities, greenways, and agriculture. The Cabarrus County Zoning Ordinance requires perennial streams have a buffer equal to 50' plus 4 times the average slope (up to 120' total) on each side of the stream. Intermittent steams have a 30' buffer on each side of the stream. No development, including soil disturbing activities or grading, shall occur within this buffer area. Exceptions do exist for utilities, greenways, and agriculture. Grading and erosion control plan review and approval for projects within the planning area are subject to State review. Erosion control measures for all areas outside of any High Quality Waters (HQW) shall be designed to accommodate the 10 -year design storm. Any areas disturbed within a HQW shall have additional requirements with the most notable being the increase to designing for the 25 year design storm. Energy Harrisburg is provided power by Duke Energy, as is all of Cabarrus County. A transmission right -of -way is bisects the study area beginning on the western edge at Tom Query Road and runs east to the planning area boundary at Rocky River Road and Monterosa Road. PART II: EXISTING CONDITIONS AUGU Atttac�m 0 number 1 G -1 Page 342