Fort Mifflin, Mud Island, Marine & Penrose Ferry Roads, Philadelphia, Philadelphia County, PA

Significance: Served as the primary fortification for the Americans in their blockade of British-occupied Philadelphia in 1777. Nearly destroyed in the British siege, Fort Mifflin was rebuilt as the first fortification undertaken by the United States. After the construction of Fort Delaware in 1820, Fort Mifflin was relegated to secondary states, but survives as a fine example of colonial stone masonry construction, as well as early 19th-century military architecture.

Unprocessed Field note material exists for this structure: FN-125, FN-126, FN-127

Survey number: HABS PA-1225

Building/structure dates: 1775 Initial Construction

Building/structure dates: 1777 Demolished

Building/structure dates: 1794 Subsequent Work

National Register of Historic Places NRIS Number: 70000554

forts and fortifications galleries and museums war revolutionary war mifflin fort mifflin mud mud island penrose ferry penrose ferry roads philadelphia philadelphia county pennsylvania historic american buildings survey pierre charles l enfant john montresor stephen rochefontaine louis tousard photo ultra high resolution high resolution plan library of congress national register of historic places

1933 - 1970

Library of Congress

http://www.loc.gov/

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