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Home My WebLink AboutSW5221201_Stormwater Narrative_20221220STORMWATER NARRATIVE PRINCEVILLE FARMER'S MARKET TOWN OF PRINCEVILLE OCTOBER 2022 PREPARED BY: Ioot' en A. DESCRIPTION OF PROJECT Location of Project The Town of Princeville is located geographically within the coastal plains region of North Carolina within Edgecombe County. The Town is approximately 1 mile south of the Town of Tarboro. Major transportation corridors include Highway 258 which runs east to west and Highway 64-Alt to the which runs north to south. Topography within the project area is generally flat, sloping between 0-11.5 percent. Manmade drainage features such as swales and roadside ditches collect and remove runoff. The majority of the land and soil disturbance will result from the work associated with site grading and utility construction will take place within Town owned property. Type of Development Farmer's Market Construction • 10,000 SF Pre -Engineered Metal Building • Basketball Court • 0.25 Mile Walking Trail 48 LF Water Service Line • 38 LF Gravity Sewer Service Lateral + 3,560 LF of 4-inch PVC Force Main • 296 LF of 15" HDPE Storm Sewer 0 6 Drop Inlets Existing and Future Drainage Patterns The project area is located in flood Zone X and is protected by a levee. No base flood elevations are available within this zone. Geological features for the Town of Princeville are typical of the North Carolina coastal plain region with gradual elevation changes draining to a common tributary and discharge point. There are no sudden or significant elevation changes in the area. The specific topography within the project area consists of gradual elevation changes leading to roadside ditches or natural drainage features. All stormwater run-off from the Farmer's Market will be captured in 15-inch HDPE Storm Sewer and discharged into the existing roadside ditch. Stormwater run-off from the walking trail and basketball court will follow the existing natural drainage features and will sheet flow into the Tar River. Impervious Surface The overall site consists of a combined 13.53 acres divided into five different parcels all owned by the Town of Princeville. Approximates 0.17 acres of existing impervious surface will be removed during the demolition phase of the project and approximately 0.94 acres of impervious surfaces will be added. The additional 0.77 acres of impervious surfaces added represents 5.7% of the overall site.