Detailed descriptions and photographs of historic buildings and structures. Part 2 of Volume 5 (Buildings 110-128A, including the Mortar Battery, rev. 1, January 2010) includes:

• Building 124 (Nike Sighting Station, 1954)
• Mortar Battery (Battery Haskin-Overton, also designated Buildings 125-127, 1897)
• Mortar Battery Fire Control Booths (including Buildings 127B and 128A, 1904)
• Building 127A (Nike Generator Building, 1954)
• Building 127C (Transformer Vault No. 9, 1955)
• Building 128 (Mortar Battery Powerhouse, 1897)

All buildings and structures in this part were located in the Defense and Support Area.