The longest seawall in the state is at the West End of the island of Maui. Over 1000 feet long, we were tasked with stopping the erosion of the foundation of the wall attributable to tides and wave activity. As Maui County would not allow any construction within the Shoreline Setback Area, our only course of action was to preserve the sands “in place” under the wall. We accomplished this by first installing an environmentally safe layer of Uretek polyurethane grouts to seal off the below layer of micro-fine cement that effectively cemented the sands “in place” using permeation grouting techniques. Since then, our crews have completed similar projects using a range of differing technologies, including the above technology, to repair and preserve a number of seawalls and structures in Hawaii.