SS UNITED STATES (Steamship)
Also known as: U.S. Maritime Commission No. 2917
Why it's listed
Built as an ocean liner at Newport News, Virginia, and completed in 1952 to a design by William Francis Gibbs, the ship is a steel hull with aluminum superstructure, roughly 990 feet overall and 53,329 gross tons. Its propulsion used four Westinghouse two-stage steam turbine sets driving 18-foot propellers, with separate boiler and engine rooms duplicated for redundancy. The ship set the Atlantic passage record on her maiden voyage in July 1952 and served the New York to Southampton route for seventeen years. Its longitudinal framing, subdivision into four compartments, fireproofing and large use of aluminum are cited as innovations that influenced later ship design. The ship is listed for its engineering achievements, and the nomination presents it as the culmination of Gibbs's career. Much of the interior has been stripped, but the propulsion, boilers, generators and structural framing are described as intact.
Significance in brief: The nomination argues the ship is significant for its engineering: a longitudinally framed steel hull, extensive use of aluminum in the superstructure, a high-pressure steam turbine propulsion plant, and redundant systems for safety. It also presents her as the fastest and most powerful merchant ship of her era and as the culminating work of Gibbs's career. The property is nominated under Criterion C and Criteria Consideration G because its significance falls within the past fifty years.
Machine-generated summary. This summary was generated by a language model from the official nomination document and has not been reviewed line by line by an editor. It may contain errors. Check the source document before relying on any detail. Source: nomination document (PDF) · National Archives catalog entry. NRHP reference 99000609, listed June 3, 1999. Summary generated October 2026 (model claude-haiku-5-5, prompt v1.1-2026-10-29, confidence medium).
Key facts
| Address | Pier 82, Philadelphia |
|---|---|
| County | Philadelphia |
| Listed | June 3, 1999 |
| Reference number | 99000609 |
| Resource type | Structure |
| Period of significance | 1952 |
| Architect / builder | William Francis Gibbs (architect); Newport News Shipbuilding and Dry Dock Company (builder) |
| Architectural style | Ocean liner |
| Criteria |
|
| Areas of significance | Engineering |
| Level of significance | National |
| Status (as stated in the nomination) | Moored at Pier 82 in Philadelphia; interior passenger fittings removed and lifeboats and davits missing, while engineering areas remain intact. |
| Acreage | 2.5 |
| Coordinates | 39.91807, -75.13652 (NPS GIS) |
What listing means for this property
National Register listing is honorary: it recognises significance and does not restrict what a private owner may do without federal money or permits. It unlocks the 20% federal rehabilitation tax credit for income-producing buildings, state credits in many states, and Section 106 review when federal agencies are involved. See what listing means in practice.
General information, not legal or tax advice. Rules change; confirm with your State Historic Preservation Office or a qualified adviser.
Sources and further reading
- National Park Service, National Register of Historic Places database (snapshot May 2026), reference 99000609.
- Nomination form (PDF, National Archives) — catalog entry
- Wikipedia article (used for cross-checking only; text not reproduced here)
- Wikidata Q1545509
- This listing as JSON
Last updated October 2026. Found an error? See the editorial policy for how to report it.