Stormwater Flood Control
Ebinport Road Stormwater Improvements
City of Rock Hill
McAdams performed an assessment and analysis of the existing box culvert and adjacent homes at the intersection of Ebinport Road and Northgate Lane in an effort to reduce periodic flooding. This box culvert system collects drainage from roughly 70 acres of an urbanized watershed and was identified as an area of the concern by the City of Rock Hill based on preliminary modeling. In accordance with the project directives, McAdams collected data defining the existing infrastructure in the area and modeled the performance of the culvert. As part of the due diligence process, our staff met with residents in the neighborhood affected by the flooding. McAdams developed a feasibility study and considered several alternatives to alleviate flooding in the area. These alternatives included re-routing of the storm drainage infrastructure, enhancement of the stream and adjacent floodplain and the construction of an upstream stormwater flood control facility. This proposed facility would collect drainage from roughly half of the upstream watershed and slowly release runoff at a rate to protect downstream properties. The feasibility report detailed each of the alternatives and associated environmental impacts, permitting and construction costs. From this report, the City of Rock Hill made an informed decision on the best corrective action for flooding in the area. McAdams is currently in the design phase with the City of Rock Hill for the upstream stormwater flood control facility, and will also be involved during the construction bidding and implementation phases of the project.