Building 202 of the Navy Yard Annex was constructed in 1941 by the Public Works Administration. It was used for gun assembly and manufacture of optical parts for the military. Along with the other buildings in the Navy Yard Annex, it is now part of the Capitol Riverfront redevelopment, and is slated to be turned into residential units.
The building is 5 stories high, and 150 x 400 feet, with a steel frame and brick exterior.