National Register of Historic Places in San Francisco

National Register #14000150: Union Iron Works Historic District Building 101
  National Register #14000150: Union Iron Works Historic District Building 102
  National Register #14000150: Union Iron Works Historic District Building 103
  National Register #14000150: Union Iron Works Historic District Buildings 11 and 21
10 January 2016
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National Register #14000150
Union Iron Works Historic District
Bounded by Illinois, 18th, 22nd Streets
Founded 1884

The Union Iron Works Historic District, while retaining the essence of its original design, typifies subsequent changes in shipyard design up to the end of World War II in 1945.

The early history of Union Iron Works (UIW) coincides with the shift from wood to iron shipbuilding. By opening the first steel shipyard on the West Coast in 1884, UIW established a national steel hull shipbuilding industry.

Over the next three decades, the shipyard played an integral role in the United States government's efforts to increase naval resources and bolster the nation's image as an international military power. By World War I, the yard stood at the center of the shipbuilding industry on the West Coast. A crew of mostly skilled laborers produced dozens of warships and submarines that resulted in the United States' overwhelming success in World War I.

Between the World Wars, the shipyard's ability to build and repair all ships afloat kept it profitable. As World War II approached, UIW participated in the unprecedented military build-up. During World War II, ship repair and naval contracts made a significant contribution to the war.

Over the decades, UIW maintained and used many of the older buildings. The result is a unique collection of buildings from all periods of the steel shipbuilding industry in the United States.

Source: Adapted from the NRHP nomination.

The following is a partial list of the thirty-eight buildings, two sites and four structures which contribute to the historic district.

Name Year Address Remarks Sort Address Sort Name
Union Iron Works Main Office1917Building 101 (20th and Illinois Streets)Architect Frederick H. MeyerB101Union Iron Works Main Office
Powerhouse1912Building 102 (20th Street)Architect Charles Peter Weeks. Spanish Renaissance revival.B102Powerhouse
Steam Powerhouse No. 21937Building 103 (20th Street)B103Steam Powerhouse No. 2
Union Ironn Works Office Building and Industrial Relations Building1896Building 104 (20th Street)Architects Percy & Hamilton. Renaissance Revival.B104Union Ironn Works Office Building and Industrial Relations Building
Noonan Building1941Building 11Woodframe building used as tool room and office.B011Noonan Building
Substation No. 51900Building 21Industrial-vernacular building which is the only surviving building from the Risdon Iron and Locomotive Works which closed in 1911.B021Substation No. 5
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