REPLACE ROOFS AND VENTS FORT CRONKHITE, GOGA The Department of the Interior, National Park Service, Golden Gate National Recreation Area, has a requirement to replace roofs and vents at Fort Cronkite and Gutter Guards at Fort Barry. The work of this contract consists of supervision, labor, equipment, testing, and supplies required for the removal and replacement of roofs on four buildings, vents on ten roofs, options for vents on three buildings at Fort Cronkhite, and options for gutter guards on two buildings at Fort Barry.