U.S. Naval Base, Pearl Harbor, Exterior Cranes, Bridge Gantry Crane No. 1, Welding slab along Third Street, near intersection with Avenue G, Pearl City, Honolulu County, HI

Significance: Bridge Gantry Crane BG-1, along with a similar crane BG-2, were key tools that facilitated the successful construction of Dry Dock Nos. 2,3, and 4 at the Pearl Harbor Naval Base. BG-1 and BG-2 were skillfully integrated into the construction process and were the primary means of constructing and placing all forms, and the primary means of carrying concrete buckets to the tremie rigs.
Survey number: HAER HI-68-C
Building/structure dates: 1941 Initial Construction