This ETL will furnish guidance for the planning, design, and construction of foundations constructed in-the-wet for civil works structures. This document covers foundation types, subgrade preparation methods, test programs, positioning systems, installation techniques, quality control procedures, tolerances, case histories, and lessons learned. Traditionally, marine structures have been constructed in-the-dry within a cofferdam using a dewatering system. An alternative method, with potential cost savings, is in-the-wet construction. To extend foundation preparation and construction technology to in-the-wet conditions introduces a new level of difficulty.
