1. Nourishment, Groins, Seawalls, Breakwaters, Jetties.

2. Beach Erosion
(Right) Beach on the North end of Folly has disappeared (Below) Beach Erosion at 7th (left) and by 65th (right) on IOP

3. Isle of Palms nourishment
Last completed in 2008
Take 3 months
Currently planning another Renourish
30% of sand was lost in the first 2 years
Before (top) and After (bottom)
(Below) Nourishment zones

4. Folly Beach nourishment
Last completed in 2014
Take 6 months
Cost $30 mil this last time
Done every 8 years

5. Folly Groins
Groins on Folly Beach (48 total) (Left) End groin on the far north part of the beach. (Above) Groin in the middle of the beach. Notice the difference in the above picture on left and right side. (Which direction is the Longshore current?)

6. FOLLY Groins
(Right) Satellite imagery of the groins in the north portion of Folly Beach. (Below) 750 ft long Terminal Groin in the south portion of Folly Beach County Park

7. Seawalls Seawalls BEFORE and AFTER
Installing a seawall will save houses, but destroys the beach long term. Biodiversity is decimated as a result.

8. Seawalls The Battery Wall first built around 1730.
Early 1900s, “The Turn” was built to connect High and Low Battery
Rebuilding has happened many times
(Above) Restoring The Turn in 2013

9. Seawalls 1+ mile long seawall in Georgetown County
(Above) Illegal Seawall at Wild Dunes on IOP
(Below) Seawalls were temporarily allowed in by SC for a study. As of they must all be removed.

10. Breakwater
Charleston Harbor Marina is surrounded by breakwaters to slow impending waves

11. Charleston Harbor Jetties
Built in 1880s
3 miles long, 0.5 miles wide
Purpose: Dredged to 18 feet at low water to allow deep, long channel for shipping entering Harbor
Before jetties, channel was 11 feet deep
Effect: Interrupt longshore current and transport of sand to the south, depleting Folly and Morris Islands
Morris Island Lighthouse

13. Charleston Harbor Jetties

14. Morris Island Lighthouse
Built in 1876 – stood 0.5 miles from edge of water
1938 – Lighthouse was on the edge of the water
Currently it is 0.35 miles off shore
(Top Right) 1938 w/ housing complex
(Bottom right) Current high tide
(Bottom left) Current low tide

15. SC Beach Management Policies
South Carolina state law states that no new erosion control structures or devices are allowed seaward of the sand dune crest.
Shoreline structures are allowed the protect a public highway that was built before this law went into effect in 2002.
Current shoreline structures cannot be enlarged or rebuilt, the structures must be maintained.
In 2014, a bill was passed that allowed the Debordieu (Georgetown County) seawall get rebuilt and extended from 400 ft to 1.5 miles.
This opens up possible gray areas for other groups attempting to build their own seawalls, to the detriment of the beach
Folly Beach is EXEMPT from such rules.