The Project

Between 2015 and 2017, Orangeburg County experienced extreme flooding during Hurricanes Joaquin, Matthew, and Florence. These three presidentially declared natural disasters resulted in the provision of federal recovery funds to repair and upgrade failing drainage assets to improve the community’s resilience in future flooding events. Funded through a US Housing and Urban Development (HUD) Community Block Grant – Mitigation (CDBG-MIT), this identified flooding issues, assessed existing stormwater systems, prioritized flood mitigation projects, and established an implementation strategy for the identified projects.

Working as a subconsultant, RK&K was the lead hydraulic analysis and design team studying County flooding sites. We also assisted the prime consultant with public information meetings, reviewed and organized the gathered data, and performed an initial project field inspections.

Once our team completed the data gathering and project organization, RK&K worked with SCOR to identify the projects that could move forward for an in-depth study. These projects required a field survey of the drainage structures and pipes. Our staff performed a two-dimensional analysis was performed determine the severity of the flooding in the concerned areas, then designed new systems to eliminate or drastically reduce the flooding. The designed solutions and cost estimates were incorporated into the FEMA BCA. We then applied a Social Vulnerability Index (SoVI) considerations associated with Low-to-Moderate (LMI) communities to determine which projects fell with the LMI areas. Using the site drainage studies, RK&K worked with SCOR to develop a priority list of projects to comply with the SCOR criteria. Our team provided information for inclusion in the final report, which included an executive summary. All design information and GIS data was provided to SCOR for the County’s use.

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