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

Element Data

Source: National Bridge Elements dataset, 2016 edition. This feature is experimental.
ElementUnitsQuantity1. Good2. Fair3. Poor4. Serious
Steel Girder/Beamlinear ft.1,6571,657000
Reinforced Concrete Decksq. ft.26,18526,185000
Reinforced Concrete Columneach3838000
Reinforced Concrete Pier Walllinear ft.389389000
Reinforced Concrete Abutmentlinear ft.190189010
Reinforced Concrete Pier Caplinear ft.579579000
Strip Seal Jointlinear ft.192192000
Elastomeric Bearingeach7070000
Fixed Bearingeach1414000
Bridge Rail
Reinforced Concrete Bridge Raillinear ft.552549030