National Park Service U.S. Department of the Interior

National Register of Historic Places Program

The National Register of Historic Places is the official list of the Nation's historic places worthy of preservation. Authorized by the National Historic Preservation Act of 1966, the National Park Service's National Register of Historic Places is part of a national program to coordinate and support public and private efforts to identify, evaluate, and protect America's historic and archeological resources.


Property Name Union Iron Works Historic District
Reference Number 14000150
State California
County San Francisco
Town San Francisco
Street Address East of Illinois Street between 18th and 22nd Streets
Multiple Property Submission Name N/A
Status Listed 4/17/2014
Areas of Significance Industry - Maritime, Architecture - Industrial
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Union Iron Works (UIW) is a maritime industrial district eligible for the National Register of Historic Places under Criteria A and C. The district is significant at the national level under Criterion A for its association with the development of steel shipbuilding in the United States. The period of significance begins in 1884, with the construction of the shipyard, and ends in 1945 at the close of World War II, when the yard was at its greatest build-out. UIW is significant for its pioneering technological developments in shipbuilding, and the production of significant wartime vessels. The district is also eligible at the local level under Criterion C in the area of Architecture for the same period of 1884 to 1945. The UIW historic district is a physical record of the trends in industrial architecture from the late nineteenth century through World War II.

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Properties are listed in the National Register of Historic Places under four criteria: A, B, C, and D. For information on what these criterion are and how they are applied, please see our Bulletin on How to Apply the National Register Criteria