Board of Water Supply. Conduit and Reservoir Division. Narrows Siphon 1. Cradle used to lay submarine pipe between Brooklyn and Staten Island. The cradle has just been lifted from municipal dock at Stapleton, Staten Island, where it was stored during the spring of 1915 and preceding winter. It is suspended between derrick scows "Century" (left) and "Capitol" on the right. The flat scow "Luna" (center) was used only as a separator between the two derrick scows. June 7, 1915.