Building 170

Building 170 is a historic former electrical substation located in the Navy Yard neighborhood of Washington, D.C., near the Anacostia River. Constructed in 1919, it played a significant role in U.S. naval weapon production during both World Wars. Recently renovated and now owned by the U.S. Department of Transportation, the building is part of the Washington Navy Yard Annex Historic District, listed on the National Register of Historic Places in 2008. The structure showcases industrial Colonial Revival architecture and features plans for retail space, making it an interesting site for tourists and researchers interested in military history and urban redevelopment.