Share:

THIRTY FIRST ST over ALLEG.RIV.,RR'S,LOCALS

Map 

Coordinates:
+40.46255, -79.97486
40°27'45" N, 79°58'29" W
Source: National Bridge Inventory
Information not verified. Use at your own risk.

Facts 

Name:THIRTY FIRST ST over ALLEG.RIV.,RR'S,LOCALS
Structure number:000000000001672
Old structure number:022122001000250 (from 1992 edition)
Location:PITTSBURGH-31ST ST.BRIDGE
Purpose:Carries highway and pedestrian walkway over highway, waterway, and railroad
Route classification:Other Principal Arterial (Urban) [14]
Length of largest span:379.9 ft. [115.8 m]
Total length:2729.1 ft. [831.8 m]
Roadway width between curbs:34.1 ft. [10.4 m]
Deck width edge-to-edge:43.6 ft. [13.3 m]
Vertical clearance below bridge:3280.7 ft. [999.9 m]
Skew angle:99°
Owner:State Highway Agency [01]
Year built:1928
Year reconstructed:2013
Historic significance:Bridge is not eligible for the National Register of Historic Places [5]
Design load:M 18 / H 20 [4]
Number of main spans:3
Main spans material:Steel [3]
Main spans design:Arch - Deck [11]
Deck type:Concrete Cast-in-Place [1]
Wearing surface:Bituminous [6]

Latest Available Inspection: June 2015 

Status:Open, no restriction [A]
Average daily traffic:860 [as of 2015]
Truck traffic:16% of total traffic
Deck condition:Very Good [8 out of 9]
Superstructure condition:Fair [5 out of 9]
Substructure condition:Fair [5 out of 9]
Structural appraisal:Somewhat better than minimum adequacy to tolerate being left in place as is [5]
Deck geometry appraisal:Equal to present minimum criteria [6]
Underclearances appraisal:Basically intolerable requiring high priority of corrrective action [3]
Water adequacy appraisal:Superior to present desirable criteria [9]
Roadway alignment appraisal:Equal to present desirable criteria [8]
Channel protection:Bank protection is being eroded. River control devices and/or embankment have major damage. Trees and rush restrict the channel. [5]
Pier/abutment protection:Navigation protection not required [1]
Scour condition:Bridge foundations determined to be stable for assessed or calculated scour condition. [5]
Operating rating:43.9 tons [39.9 metric tons]
Inventory rating:36.0 tons [32.7 metric tons]
Sufficiency rating:77.7
Recommended work:Other structural work, including hydraulic replacements. [38]
Estimated cost of work:$10,000

Previous Inspections 

DateSuff. ratingEvaluationDeckSuper.Sub.ADT
June 201577.7Not deficientVery GoodFairFair860
June 201360.6Not deficientVery GoodSatisfactoryFair6209
June 201124.5Structurally deficientPoorPoorSerious6408
June 200924.4Structurally deficientPoorPoorSerious6477
December 200734.1Structurally deficientPoorPoorPoor7085
May 200610.6Structurally deficientPoorSeriousSerious6972
May 200510.0Structurally deficientPoorSeriousSerious6903
May 200410.0Structurally deficientPoorPoorSerious6903
May 200311.4Structurally deficientPoorPoorSerious6231
May 200211.7Structurally deficientPoorPoorSerious6121
July 200111.9Structurally deficientPoorPoorSerious6013
July 200011.9Structurally deficientPoorPoorSerious6013
20000.0Not applicable---100
November 199812.3Structurally deficientPoorPoorSerious5791
September 199712.3Structurally deficientPoorPoorSerious5791
September 19969.5Structurally deficientPoorPoorSerious7146
July 199524.0Structurally deficientPoorPoorSerious7146
August 199425.2Structurally deficientPoorPoorSerious6015