U.S. Naval Base, Pearl Harbor, Dry Dock No. 4, East & West Pumpwells, Near south end of Third Street, at east & west sides of Dry Dock No. 4, Pearl City, Honolulu County, HI

Significance: They are located within the Pearl Harbor National Historic Landmark. These two facilities were built in 1943 in association with the expansion of dry dock facilities at Pearl Harbor during WWII. The two pumpwells along with the floating caisson gate, capstans, blocking, service and track systems, and short quay walls on both sides of the dock entrance are fundamental components of the operation of Dry Dock No. 4. All four dry docks at Pearl Harbor are ingenious engineering feats and are critical facilities for the Navy Yard and its main function of ship repair, Dry Dock No. 4 and its two pumpwells are still in active use today.
Survey number: HABS HI-506
Building/structure dates: 1943 Initial Construction
National Register of Historic Places NRIS Number: 66000940