Monongahela Incline
Why it's listed
The Monongahela Incline is a cable-hauled passenger inclined plane linking West Carson Street near the Smithfield Bridge with Grandview Avenue on Mount Washington in Pittsburgh. The company was chartered in 1867 to build and operate it, and the line began service on May 28, 1870. Samuel Diescher, who helped build it, rebuilt the original wooden structure in iron in 1882. A parallel vehicular plane was added in 1884, and the passenger plane was electrified in 1935. Two cars counterbalance each other on a 640-foot track, climbing and descending in about a minute and forty-five seconds. The Carson Street station is a simplified Second Renaissance Revival building of brick and stone. The incline is listed for its role in hillside housing and mass transit, and for its operating history as one of Pittsburgh's inclines still in service.
Significance in brief: The nomination argues that Pittsburgh's inclines were central to the city's hillside housing growth, since mills occupied the river flats and left little land for homes. It describes the Monongahela Incline as a surviving working part of the city's mass transit system, one of two inclines still operating in Pittsburgh. It also notes the Carson Street station's simplified Second Renaissance Revival design.
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 74001742, listed June 25, 1974. Summary generated October 2026 (model claude-haiku-5-5, prompt v1.1-2026-10-29, confidence medium).
Key facts
| Address | Grandview Ave. at Wyoming Ave., Pittsburgh |
|---|---|
| County | Allegheny County |
| Listed | June 25, 1974 |
| Reference number | 74001742 |
| Resource type | Structure |
| Period of significance | 1869-1882 |
| Architect / builder | John Endres and Samuel Diescher (construction assistance); J.S. Kirk (survey); John Roebling (cable specifications) |
| Architectural style | Second Renaissance Revival (simplified, Carson Street station) |
| Areas of significance | Transportation |
| Level of significance | Local |
| Status (as stated in the nomination) | In operation as part of the city's mass transit system; the 1935 vehicular incline and its stations were removed; the Grandview station is a simple wood structure. |
| Acreage | 1 |
| Coordinates | 40.43188, -80.00523 (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 74001742.
- Nomination form (PDF, National Archives) — catalog entry
- Wikipedia article (used for cross-checking only; text not reproduced here)
- Wikidata Q6901799
- This listing as JSON
Last updated October 2026. Found an error? See the editorial policy for how to report it.