![]() Like other seawalls, height plays the largest cost factor. ![]() They’re created one of two ways: on-site with wet concrete poured into forms or in precast panels or blocks. They’re almost always reinforced with steel rebar. Riprap seawalls cost $70 to $200 per linear foot. It’s a pile of small boulders and large rocks laid against the shore, usually at a grade of 30 to 45 degrees, and used in front of other seawalls. You’ll often find it used with a living seawall, where marine grasses and other growth are planted near the shoreline to curb erosion. Permit fees and regulatory processes for seawalls vary from place to place, but often fall in the $400 to $1,500 range expect higher costs in areas of Florida and Texas. Coastal prices vary by state, usually due to locally regulated building requirements. You will almost always need a permit for construction on a waterway. Typically, you’ll pay about twice as much for saltwater seawalls as you would freshwater bulkheads. Larger selection of materials since corrosion isn’t a factor Not only will saltwater corrode many types of seawalls, but you also need to build high enough to account for the tidal variations in sea level-two issues not present at inland lakes.įreshwater lake walls often cost far less than coastal projects for various reasons, including: But size and material determine cost more than the type of water. ![]() Heavy machinery drives seawalls into the ground in sheets. ![]()
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