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 

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. ratingEvaluationDeckSuper.Sub.ADT
August 201584.1Not deficientGoodSatisfactorySatisfactory34000
September 201384.1Not deficientGoodSatisfactorySatisfactory34000
September 201181.0Functionally obsoleteVery GoodSatisfactorySatisfactory42100
October 201081.0Not deficientVery GoodSatisfactorySatisfactory47900
September 200881.0Not deficientVery GoodSatisfactorySatisfactory47900
November 200781.0Not deficientVery GoodSatisfactorySatisfactory47700
November 200577.0Functionally obsoleteExcellentSatisfactorySatisfactory47700
October 200477.0Functionally obsoleteExcellentSatisfactorySatisfactory47700
October 200377.0Functionally obsoleteExcellentSatisfactorySatisfactory47700
September 200061.2Structurally deficientSeriousFairFair51300
October 199962.2Structurally deficientPoorFairFair45100
September 199783.8Functionally obsoleteSatisfactorySatisfactorySatisfactory12900
July 199586.0Functionally obsoleteSatisfactorySatisfactorySatisfactory12900
August 199486.0Functionally obsoleteSatisfactorySatisfactorySatisfactory12900
November 199386.0Functionally obsoleteSatisfactorySatisfactorySatisfactory12900
May 199286.0Functionally obsoleteSatisfactorySatisfactorySatisfactory12900
October 199088.0Functionally obsoleteSatisfactorySatisfactorySatisfactory12900