Description
The Alma (built 1891; scow schooner) and Hercules (built 1907; tugboat) HABS/HAER aperture cards, 1989, 1997, 2001-2002, (SAFR
24665, P16-007) are comprised of aperture cards containing microfilm copies of existing condition drawings documented by the
Historic American Engineering Record (HAER) program of San Francisco Maritime National Historical Park vessels ALMA and HERCULES.
The collection has been processed to the Collection level and is open for use.