SULLIVAN’S ISLAND, S.C. (WCSC) - The town of Sullivan’s Island is working to reduce the effects of flooding with projects in the works and a study that forecasts sea level rise and offers solutions to combat it.
A working stormwater system on Sullivans Island is no longer just a pipe dream, Mayor Patrick O’Neill said.
“This is the exciting beginning to a project that’s been years in the making,” he said.
The existing storm drain system is failing, leading to flooding.
“We’re going be removing and replacing some of the existing storm drains and putting in new,” Golf Stream Construction Senior Project Manager Cam Cooper said.
Crews are working on adding massive pipes starting with Station 28.5 and Station 31. O’Neill said the pipes will make it easier for rainwater to get collected and flow out to the marsh. That is one of several flood related projects the town is prioritizing.
Town council will look at a sea level adaptation and resilience plan, which highlights nature-based solutions, on Tuesday.
“What we’re really trying to do with these practices as is mimic predevelopment hydrology, so water moves across the land like before we built upon it,” Weston & Sampson Team Leader Kim Morganello said.
The plan will recommend ten adaptation strategies including redesigning Middle Street, a main road on the island. Researchers looked at where street level rain gardens can be added and where permeable parking would be possible.
The study also looked at open space around the island, researchers identified 33 specific locations that could have nature-based solutions. One of the projects is already moving into implementation, a rain garden will be going in at the Sullivans Island Elementary School.
Morganello said the plan serves as a guidebook through 2050 for the town to reference among anticipated increases in high tides and storms. A model allowed researchers to simulate what the future on the island could look like.
“We increased the title storm search value to almost two feet to show what it would look like in 2050. We also added an increase in rainfall depth to simulate some stronger, more frequent and more intense storms,” Weston & Sampson Senior Project Scientist Lucas Hernandez said.
Hernandez said the models and research provides the town with information that will allow officials to begin to address some items on the community rating system through FEMA.
“That system actually feeds into the insurance premiums for a community standpoint,” Hernandez said.
O’Neill added being proactive on anticipated flood concerns is the best strategy for the town.
“We’re definitely planning for tomorrow’s needs and not today because we do expect sea level rise will continue, we expect there to be more extreme rain events, so we’re trying to plan ahead for that,” O’Neill said.
At Tuesday’s council meeting, members could accept the sea level adaptation and resilience plan document, but they will not be voting on anything in it. O’Neill said as the town considers those solutions there will be opportunity for community involvement along the way.
Click here to review the draft plan.
Click here for the latest on Sullivan’s Island Town Council meetings.