Fort Drum construction from CSDG.
A picture of Ft. Drum under construction on Fraile Island in Manila Bay, given to me Glen Williford, a leader in the Coastal Defense Study Group (CDSG). The original picture name was: Pcon-080 77F-111-86-34 Ft Drum 3-19-1914-p18b7nck1ihn1d8717hj198q1e2o
Note from Karl: Looks like some rigging derricks.