This map, by the U.S. Army Engineers, is updated to show details as of 1938. It names the various gun batteries of the fort, all of which (minus their guns) still exist today (in 2010). The concrete of the batteries on the heights of the north end of the fort and of Battery Basinger below them is now seriously deteriorated, and brush chokes the margins of these batteries. The smaller 3-inch gun batteries (Stevens and Smyth) on the east side of the former parade ground are now also very overgrown. A couple of the former officers' quarters at the south end of the fort are the only wooden buildings of the fort to have survived the clearance and re-grading. This redevelopment (during the past 10 years) also resulted in the former parade ground area being filled with several feet of sand, raising its elevation significantly.

The center portion of the fort, between the two roadways, was the actual parade ground. Much of this area (and the area marked as the site of Anti-Aircraft Battery No. 3) has today been redeveloped into a children's camp for the City of Boston, and a fence has been erected at the northeast end of the old parade ground, to keep visitors out of the old concrete structures nearby. The Mining Wharf has been redeveloped into a modern pier for boats coming from Boston.

The red labels were added to this map for Wikipedia to highlight and better identify the structures associated with the storage and preparation of submarine mines, which continued at the fort into WW2, after the command and firing functions for the southern sector mines of the harbor defense were moved to nearby Fort Warren on Georges Island.