Thirty-First Street Bridge | |
|---|---|
 | |
| Coordinates | 40°27′47″N 79°58′33″W / 40.4630°N 79.9758°W |
| Carries | 2 lanes of 31st Street |
| Crosses | Allegheny River; Washington's Landing |
| Locale | Pittsburgh |
| Official name | William Raymond Prom Memorial Bridge |
| Other name(s) | 31st Street Bridge |
| Characteristics | |
| Design | Arch bridge |
| Total length | 2,681 feet (817 m) |
| Longest span | 360 feet (110 m) |
| Clearance below | 72.6 feet (22.1 m) |
| History | |
| Opened | 1928 |
| Rebuilt | 2011–2012 |
| Location | |
 | |
The William Raymond Prom Memorial Bridge, commonly known as the 31st Street Bridge, is an arch bridge that carries vehicular traffic across the Allegheny River between the Pittsburgh neighborhoods of Troy Hill and the Strip District. The bridge passes over but does not serve Washington's Landing, which is connected to the mainland by the 30th Street Bridge. Sidewalks along the bridge feature viewing platforms.