 The SFPD took over law enforcement jurisdiction of non-USCG parcels of Yerba Buena Island.SFFD Fire Station 48 on Treasure Island took over medical rescue & fire protection of Yerba Buena Island (including USCG Sector / Station San Francisco) and portions of the San Francisco–Oakland Bay Bridge.Located west of the island was "Blossom Rock", a treacherous submerged rock that lay only below the surface of the water at low tide.