Frankford Arsenal, Building No. 65, South of Tacony Street between Bridge Street & tracks of former Pennsylvania Railroad, Philadelphia, Philadelphia County, PA

Significance: Established in 1816, the Frankford Arsenal served for three decades as a depot for the storage and repair of arms, accoutrements, and ammunition for the United States Army. From 1849 to 1976, the arsenal served as the nation's principal developer and manufacturer of small arms and artillery munitions. Frankford Arsenal pioneered mechanized production of munitions and developed numerous important innovations in ordnance and precision instruments. Technological innovations introduced at Frankford Arsenal made important contributions to the mechanization of American industry and the implementation of interchangeability and mass production techniques.
Survey number: HAER PA-74-C
Building/structure dates: 1918 Initial Construction
Building/structure dates: 1942 Subsequent Work
Building/structure dates: 1946 Subsequent Work