51ST ST over I- 90,94 RYAN & CTA


+41.80170, -87.63114
41°48'06" N, 87°37'52" W
Source: National Bridge Inventory
Information not verified. Use at your own risk.


Name:51ST ST over I- 90,94 RYAN & CTA
Structure number:016115700000000
Old structure number:000016115726291 (from 1992 edition)
Location:3.2 M S I-55
Purpose:Carries highway overpass over highway and railroad
Route classification:Collector (Urban) [17]
Length of largest span:71.9 ft. [21.9 m]
Total length:276.3 ft. [84.2 m]
Roadway width between curbs:78.1 ft. [23.8 m]
Deck width edge-to-edge:95.1 ft. [29.0 m]
Vertical clearance below bridge:15.1 ft. [4.6 m]
Skew angle:
Owner:State Highway Agency [01]
Year built:1962
Year reconstructed:2004
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:5
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: September 2016

Good/Fair/Poor Condition:Fair
Status:Open, no restriction [A]
Average daily traffic:10,400 [as of 2014]
Truck traffic:8% of total traffic
Deck condition:Good [7 out of 9]
Superstructure condition:Very Good [8 out of 9]
Substructure condition:Satisfactory [6 out of 9]
Structural appraisal:Equal to present minimum criteria [6]
Deck geometry appraisal:Superior to present desirable criteria [9]
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:98.0 tons [89.1 metric tons]
Inventory rating:77.3 tons [70.3 metric tons]
Sufficiency rating:95.0

Previous Inspections

DateSuff. RatingConditionDeckSuperstructureSubstructureSD/FOADT
September 201695.0FairGoodVery GoodSatisfactory-10400
September 201495.0FairGoodVery GoodSatisfactory-10400
October 201296.0GoodGoodVery GoodGood-20600
October 201086.6GoodGoodVery GoodGood-215000
December 200896.0GoodGoodVery GoodVery Good-20600
January 200696.4GoodVery GoodVery GoodVery Good-11900
September 200496.4GoodVery GoodExcellentVery Good-11900
October 200265.1PoorPoorFairPoorSD11900
December 200081.5PoorPoorFairFairSD7900
December 199981.5PoorPoorFairFairSD7900
March 199879.1PoorPoorFairFairSD14900
July 199681.1FairFairFairFairFO14900
June 199483.6FairFairFairFair-14900
November 199384.0FairFairFairFair-10600
July 199284.0FairFairFairFair-10600
March 199184.0FairFairFairFair-10600