Tags: Military Structure.
The South Boston Naval Annex was a 167-acre (68 ha) United States Navy shipyard annex located in South Boston. It was the annex of the Boston Navy Yard and was operational from the 1920 to 1974 when it was closed along with the shipyard. The annex is also home to Dry Dock Number 3 the one of the largest dry docks on the East Coast.
