To double the holding capacity of the San Vicente Dam by adding height, the San Diego County Water Authority has launched a multi-phase project, beginning with its Foundation Preparatory Work Project. The existing dam, standing at 220 feet, will be raised a total of 117 feet over the next several years. As General Contractor on this early phase, Barnard will manage a project that entails rock excavation on steep slopes, underwater work to install a 111-foot-tall cofferdam, construction of a 13-foot-diameter tunnel, concrete demolition using wiresawing, and concrete hydro demolition. Access to the work is challenging.