06/08/2026
Did you know? Glynn Countyβs Johnson Rocks were first built after Hurricane Dora and still help protect our shoreline today.
These rock barriers along St. Simons and Jekyll reduce erosion and buffer storm impacts, strengthening our coastal resilience.
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The βJohnson Rocksβ in Glynn County are a man-made coastal protection feature known as a rock revetment, located along parts of St. Simons Island and Jekyll Island. Built in the 1960s after Hurricane Dora, they were part of a federally supported effort during President Lyndon B. Johnsonβs administration to reduce shoreline damage from storms. These large rocks are designed to absorb wave energy, prevent beach erosion, and protect nearby roads, homes, and infrastructure from storm surge. Over time, the rocks have experienced wear and storm impacts, so Glynn County continues to repair and raise them to improve their effectiveness. Today, they remain a critical component of the areaβs coastal resilience and storm protection strategy.