A Tremie Seal aids an excavation to minimize water intrusion allowing for the placement of a hydrostatic slab. When you’re excavating deep, along a shoreline, close to a river, nearby a body of water, or below a water table, dewatering the site/excavation will be a challenge. A tremie seal is a non-reinforced concrete slab anchored by piles against buoyancy and installed underwater by divers within sheet piling or slurry walls to control water intrusion. Typically, the perimeter sheet piling is installed, followed by anchored (ACP) production piles. The tremie is poured under the existing water contained in the excavation. Once the concrete hardens typical about week or more, the excavation can be dewatered. Carey Marine Foundation has successfully placed Tremie Seals in some of the largest projects in the country.