Thirty-First Street Bridge
Coordinates	40°27′47″N 79°58′33″W / 40.4630°N 79.9758°W / 40.4630; -79.9758
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
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.

History

The bridge was built in 1927–1928 to replace an earlier through truss bridge aligned with 30th Street. This earlier bridge was built in 1887 but was destroyed by fire on July 8, 1921. The 1887 bridge replaced a two-span iron truss destroyed by a flood in 1882. A cable suspension footbridge was provided as a crossing while the new 31st Street bridge was being constructed.^{[citation needed]}

The bridge was due to close on Tuesday, January 31, 2006, for a proposed $27 million refurbishment which would take two years.^[1] It eventually closed on February 14, 2006, and reopened by Mayor Luke Ravenstahl on November 21, 2007.^[2]

The portion of the bridge over the river's back channel was replaced with new added on-ramps on August 16, 2012, as part of improvements on adjacent Route 28.^[3]

The bridge was renamed in 2013, from its former name of Thirty-First Street Bridge, Number Six Allegheny River to William Raymond Prom Memorial Bridge, to honor William R. Prom, who was killed in Vietnam.^[4][5][6]

• 
  Bridge supports from the river.