The Town of Sullivan’s Island proposes to construct drainage improvements in two priority sub-basins:

•  Station 18 Street/Atlantic Avenue Watershed Basin (Sta. 18)
• Station 18.5 Street/Flag Street (Sta. 18.5)

The drainage improvements are intended to provide drainage and alleviate flooding including reoccurring structural flooding with the basins. The improvements will include installing new pipes, inlets, swales, stormwater pump stations, and structures while re-establishing existing open channels and swales where possible.

Project Total $5,829,214.00

• 70.000% Federal Share $4,080,449.80
• 30.00% Local Share $1,748,764.20

The Town of Sullivan's Island secured funding through the Hazard Mitigation Grant Program, administered by the Federal Emergency Management Agency and the South Carolina Emergency Management Division. This funding supports the design, permitting, and construction of drainage improvements within the Station 18 through Station 19 service areas, including Station 18 Street, Station 18 1/2 Street, Flag Street, Station 19 Street, Atlantic Avenue and I'On Avenue. Please see the Project Documents for the full scope of the project. 

Project Documents

• HMGP 4241-0049 Technical Deliverables Phase II Stormwater Improvement- August 2022
• Sullivan's Island Multi-Basin Drainage Project FEMA Grant DR-4241 Town Council Presentation- May 21, 2024
• Sullivan's Island Multi-Basin Drainage Improvement- FINAL PLANS