Stronghold rock shoreline seawalls are installed at a 2-to-1 slope backed with Geotextile fabric using 1 to 3 feet diameter native limestone boulders. Stronghold Rip Rap are great alternatives to seawalls. They can be used as a method of repair and when installed correctly can be a very effective form of erosion control. We love to think outside the box– rip rap boulder design can be incorporated with trees and other native landscape. Stronghold Marine Construction rock, boulder & rip rap revetment shorelines has a natural environmental aesthetic to any custom landscape.