31ST ST over I- 90,94 RYAN & CTA


+41.83824, -87.63127
41°50'18" N, 87°37'53" W


Source: National Bridge Inventory. Information not verified; use at your own risk.
Name:31ST ST over I- 90,94 RYAN & CTA
Structure number:016115900000000
Old structure number:000016115926293 (from 1992 edition)
Location:0.9 M S I-55
Purpose:Carries highway overpass over highway and railroad
Route classification:Minor Arterial (Urban) [16]
Length of largest span:75.8 ft. [23.1 m]
Total length:397.3 ft. [121.1 m]
Roadway width between curbs:65.9 ft. [20.1 m]
Deck width edge-to-edge:87.9 ft. [26.8 m]
Vertical clearance below bridge:13.1 ft. [4.0 m]
Owner:State Highway Agency [01]
Year built:1961
Year reconstructed:2001
Historic significance:Bridge is not eligible for the National Register of Historic Places [5]
Design load:MS 18 / HS 20 [5]
Number of main spans:7
Main spans material:Steel continuous [4]
Main spans design:Stringer/Multi-beam or girder [02]
Deck type:Concrete Cast-in-Place [1]

Latest Available Inspection: August 2016

Good/Fair/Poor Condition:Good
Status:Open, no restriction [A]
Average daily traffic:11,200 [as of 2014]
Truck traffic:9% of total traffic
Deck condition:Good [7 out of 9]
Superstructure condition:Good [7 out of 9]
Substructure condition:Good [7 out of 9]
Structural appraisal:Better than present minimum criteria [7]
Deck geometry appraisal:Better than present minimum criteria [7]
Underclearances appraisal:Basically intolerable requiring high priority of corrrective action [3]
Roadway alignment appraisal:Equal to present desirable criteria [8]
Scour condition:Bridge not over waterway. [N]
Sufficiency rating:94.9
Recommended work:Widening of existing bridge with deck rehabilitation or replacement. [34]
Estimated cost of work:$3,779,000

Previous Inspections

DateConditionDeckSuperstructureSubstructureADTSuff. Rating
August 2016GoodGoodGoodGood1120094.9
August 2014GoodGoodVery GoodGood1120094.9
April 2013GoodGoodVery GoodGood820095.2
July 2011GoodGoodVery GoodVery Good820095.6
November 2009GoodGoodVery GoodVery Good1620095.2
December 2007GoodGoodVery GoodVery Good1620095.2
January 2006GoodGoodVery GoodVery Good1160095.4
July 2002GoodExcellentExcellentVery Good1240994.4
March 2001PoorPoorPoorPoor1240064.0
September 1999PoorPoorPoorPoor1240064.0
March 1998FairFairFairFair1240082.3
July 1996FairFairFairFair1240082.3
May 1994FairFairFairFair1240082.9
October 1993FairFairFairFair1240082.9
July 1992FairSatisfactoryFairSatisfactory1240083.9
March 1991FairSatisfactoryFairSatisfactory1240083.9