I-90 SKYWAY over 79TH ST


+41.75147, -87.58825
41°45'05" N, 87°35'18" W
Source: National Bridge Inventory
Information not verified. Use at your own risk.


Name:I-90 SKYWAY over 79TH ST
Structure number:016645100000000
Old structure number:000016645104875 (from 1992 edition)
Location:0.1 M W OF STONY ISL
Purpose:Carries highway over highway
Route classification:Principal Arterial - Interstate (Urban) [11]
Tolls:Yes, on toll road [2]
Length of largest span:117.5 ft. [35.8 m]
Total length:122.4 ft. [37.3 m]
Roadway width between curbs:100.7 ft. [30.7 m]
Deck width edge-to-edge:107.3 ft. [32.7 m]
Skew angle:45°
Owner:City or Municipal Highway Agency [04]
Year built:1958
Year reconstructed:2002
Historic significance:Bridge is not eligible for the National Register of Historic Places [5]
Design load:MS 18 / HS 20 [5]
Main span material:Steel [3]
Main span design:Stringer/Multi-beam or girder [02]
Deck type:Concrete Cast-in-Place [1]
Wearing surface:Latex Concrete or similar additive [3]

Latest Available Inspection: August 2015 

Good/Fair/Poor Condition:Fair
Status:Open, no restriction [A]
Average daily traffic:34,000 [as of 2013]
Truck traffic:13% of total traffic
Deck condition:Good [7 out of 9]
Superstructure condition:Satisfactory [6 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:Somewhat better than minimum adequacy to tolerate being left in place as is [5]
Roadway alignment appraisal:Equal to present desirable criteria [8]
Scour condition:Bridge not over waterway. [N]
Operating rating:87.3 tons [79.4 metric tons]
Inventory rating:52.4 tons [47.6 metric tons]
Sufficiency rating:84.1
Recommended work:Replacement of bridge or other structure because of substandard load carrying capacity or substantial bridge roadway geometry. [31]
Estimated cost of work:$1,638,000

Previous Inspections 

DateSuff. RatingConditionDeckSuperstructureSubstructureSD/FOADT
August 201584.1FairGoodSatisfactorySatisfactory-34000
September 201384.1FairGoodSatisfactorySatisfactory-34000
September 201181.0FairVery GoodSatisfactorySatisfactoryFO42100
October 201081.0FairVery GoodSatisfactorySatisfactory-47900
September 200881.0FairVery GoodSatisfactorySatisfactory-47900
November 200781.0FairVery GoodSatisfactorySatisfactory-47700
November 200577.0FairExcellentSatisfactorySatisfactoryFO47700
October 200477.0FairExcellentSatisfactorySatisfactoryFO47700
October 200377.0FairExcellentSatisfactorySatisfactoryFO47700
September 200061.2PoorSeriousFairFairSD51300
October 199962.2PoorPoorFairFairSD45100
September 199783.8FairSatisfactorySatisfactorySatisfactoryFO12900
July 199586.0FairSatisfactorySatisfactorySatisfactoryFO12900
August 199486.0FairSatisfactorySatisfactorySatisfactoryFO12900
November 199386.0FairSatisfactorySatisfactorySatisfactoryFO12900
May 199286.0FairSatisfactorySatisfactorySatisfactoryFO12900
October 199088.0FairSatisfactorySatisfactorySatisfactoryFO12900