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31ST STREET over METRA ELEC & CN

Map 

Coordinates:
+41.83853, -87.61070
41°50'19" N, 87°36'39" W
Source: National Bridge Inventory
Information not verified. Use at your own risk.

Facts 

Name:31ST STREET over METRA ELEC & CN
Structure number:016617300000000
Old structure number:000016617327251 (from 1992 edition)
Location:3100 S & 628 E
Purpose:Carries highway over railroad
Route classification:Minor Arterial (Urban) [16]
Length of largest span:71.9 ft. [21.9 m]
Total length:278.2 ft. [84.8 m]
Roadway width between curbs:49.9 ft. [15.2 m]
Deck width edge-to-edge:80.1 ft. [24.4 m]
Vertical clearance below bridge:21.7 ft. [6.6 m]
Skew angle:11°
Owner:City or Municipal Highway Agency [04]
Year built:1921
Historic significance:Bridge is eligible for the National Register of Historic Places [2]
Number of main spans:4
Main spans material:Steel continuous [4]
Main spans design:Stringer/Multi-beam or girder [02]
Deck type:Concrete Cast-in-Place [1]
Wearing surface:Bituminous [6]

Latest Available Inspection: July 2015 

Status:Open, would be posted or closed except for temporary shoring [D]
Average daily traffic:11,200 [as of 2014]
Truck traffic:9% of total traffic
Deck condition:Satisfactory [6 out of 9]
Superstructure condition:Fair [5 out of 9]
Substructure condition:Serious [3 out of 9]
Structural appraisal:Basically intolerable requiring high priority of corrrective action [3]
Deck geometry appraisal:Basically intolerable requiring high priority of corrrective action [3]
Underclearances appraisal:Meets minimum tolerable limits to be left in place as is [4]
Roadway alignment appraisal:Equal to present desirable criteria [8]
Scour condition:Bridge not over waterway. [N]
Operating rating:32.1 tons [29.2 metric tons]
Inventory rating:23.5 tons [21.4 metric tons]
Evaluation:Structurally deficient [1]
Sufficiency rating:23.1
Recommended work:Replacement of bridge or other structure because of substandard load carrying capacity or substantial bridge roadway geometry. [31]
Estimated cost of work:$3,666,000

Previous Inspections 

DateSuff. ratingEvaluationDeckSuper.Sub.ADT
July 201523.1Structurally deficientSatisfactoryFairSerious11200
July 201323.1Structurally deficientSatisfactoryFairSerious11200
July 201121.5Structurally deficientSatisfactoryFairSerious8200
May 200921.5Structurally deficientSatisfactoryFairSerious16200
April 200721.5Structurally deficientGoodFairSerious16200
March 200521.5Structurally deficientGoodFairSerious11600
March 200333.0Structurally deficientGoodFairSerious12409
April 200033.0Structurally deficientGoodFairSerious12400
December 199733.0Structurally deficientGoodPoorSerious12400
December 199535.0Structurally deficientGoodPoorSerious12400
December 199435.0Structurally deficientGoodPoorSerious12400
September 199272.0Not deficientSatisfactorySatisfactoryFair12400
October 199083.0Not deficientGoodGoodGood12400