Category 3 Huricane

Wave Run Up Cat #3 Storm Surge

• Vulnerability of causeway ( 7’10’’ above Mean Tide Mark) to Category 3 hurricane. Wave driven by storm surge is 0.7 m (2 ft) higher than roadway level and wave run-up is 2 m (6 ft) higher than roadway.

Category 5 Hurricane

Effect of Cat 5 Storm Surge on Traditional Causeway Structure

• Vulnerability of causeway ( 7’10’’ above Mean Tide Mark) to Category 5 hurricane. Wave driven by storm surge overtops causeway by 1.3 m  (4 ft) and water run up is nearly 3 m (10 ft) above roadway. Walls break off

New Roadway Options

Engineering Options for Consideration in the Study

Bridge Options – Height Clearances