The Model Industries building or Industries Building is a three/four-story building on the northwest corner of

Alcatraz Island Alcatraz Island () is a small island about 1.25 miles offshore from San Francisco in San Francisco Bay, California, near the Golden Gate, Golden Gate Strait. The island was developed in the mid-19th century with facilities for a Alcatraz Isla ...

off the coast of

San Francisco San Francisco, officially the City and County of San Francisco, is a commercial, Financial District, San Francisco, financial, and Culture of San Francisco, cultural center of Northern California. With a population of 827,526 residents as of ...

, USA. This building was originally built by the U.S. military and was used as a laundry building until the

New Industries Building The New Industries Building is a building on the western end of Alcatraz Island off the coast of San Francisco, United States. It was constructed in 1939 for $186,000 as part of a $1.1 million modernization scheme which also included the water to ...

was built as part of a redevelopment program on Alcatraz in 1939 when it was a federal penitentiary. As part of the Alcatraz jail, it held workshops for inmates to work in. On January 10, 1935, the building shifted to within 2.5 feet from the edge of the cliff following a landslide caused by a severe storm. The warden at the time, James A. Johnston, proposed to extend the seawall next to it and asked the Bureau for $6500 to fund it. He would later claim to dislike the building because it was irregularly shaped. A smaller, cheaper

riprap Riprap (in North American English), also known as rip rap, rip-rap, shot rock, rock armour (in British English) or rubble, is human-placed rock or other material used to protect shoreline structures against scour and water, wave, or ice erosion. ...

was completed by the end of 1935. A

guard tower A watchtower or guardtower (also spelt watch tower, guard tower) is a type of military/paramilitary or policiary tower used for guarding an area. Sometimes fortified, and armed with heavy weaponry, especially historically, the structures are ...

and a catwalk from Hill Tower was added to the roof of the Industries Building in June 1936 and the building was made secure with bars from old cells to bar the windows and grill the roof ventilators and to prevent inmates from escaping from the roof. It ceased use as a laundry in 1939 when it was moved to the upper floor of the New Industries Building. Today the building is heavily rusted due decades of exposure to the salt air and wind and the Hill Tower no longer exists. The guard tower formerly located on top of the building now sits across from the Power plant where it is on display.

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{{coord, 37, 49, 40, N, 122, 25, 31, W, type:landmark, display=title Alcatraz Island