 The 68th Street Crib was built in 1892 two miles offshore the eastern end of 68th Street.A cement hexagon-shaped crib with a brick structure atop, it originally supplied two tunnels, a diameter tunnel to the Jardine Water Purification Plant and a diameter tunnel to the South Water Purification Plant (later renamed to the Eugene Sawyer Water Purification Plant).The crib was equipped with a navigational warning light atop a steel-skeleton lighthouse and a fog bell that tolled every 12 seconds when needed.