Rehabilitate Failing Amphitheater Structure in Aquatic Park National Historic Landmark District: Environmental Assessment. San Francisco Maritime National Historical Park, California

摘要

This environmental assessment examines in detail two alternatives: no action and the National Park Service preferred alternative. The preferred alternative considers rehabilitating the amphitheater structures, portions of which are currently being supported by temporary shoring, in Aquatic Park National Historic Landmark (NHL) District within San Francisco Maritime National Historical Park (NHP). The project would entail repair, and in some cases substantial reconstruction, of the severely deteriorated visitor-use bleachers, including the structures accompanying underground offices and work spaces. Work would include removal and replacement of failed concrete and rebar in some areas, and shotcrete repair in other areas, installation of new waterproofing and drain system, replacement of skylights. The project could result in the removal of historic vegetation (i.e., cypress trees). The historically accurate landscape would be rehabilitated or restored in areas disturbed by the project, in accordance with the findings of the cultural landscape report to be completed in 2007. In addition, repairs would include upgrades for accessibility, and upgrades to facility mechanical and electrical systems to meet building codes. The purpose of the proposed project is to provide a safe and usable structure for visitors and park employees and to rehabilitate and protect the cultural resources of the building and the historic landmark district.