I-90 SKYWAY over 79TH ST


+41.75131, -87.58779
41°45'05" N, 87°35'16" 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 2017

Good/Fair/Poor Condition:Fair
Status:Open, no restriction [A]
Average daily traffic:34,000 [as of 2016]
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]
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

DateConditionDeckSuperstructureSubstructureADTSuff. Rating
August 2017FairGoodSatisfactorySatisfactory3400084.1
August 2015FairGoodSatisfactorySatisfactory3400084.1
September 2013FairGoodSatisfactorySatisfactory3400084.1
September 2011FairVery GoodSatisfactorySatisfactory4210081.0
October 2010FairVery GoodSatisfactorySatisfactory4790081.0
September 2008FairVery GoodSatisfactorySatisfactory4790081.0
November 2007FairVery GoodSatisfactorySatisfactory4770081.0
November 2005FairExcellentSatisfactorySatisfactory4770077.0
October 2004FairExcellentSatisfactorySatisfactory4770077.0
October 2003FairExcellentSatisfactorySatisfactory4770077.0
September 2000PoorSeriousFairFair5130061.2
October 1999PoorPoorFairFair4510062.2
September 1997FairSatisfactorySatisfactorySatisfactory1290083.8
July 1995FairSatisfactorySatisfactorySatisfactory1290086.0
August 1994FairSatisfactorySatisfactorySatisfactory1290086.0
November 1993FairSatisfactorySatisfactorySatisfactory1290086.0
May 1992FairSatisfactorySatisfactorySatisfactory1290086.0
October 1990FairSatisfactorySatisfactorySatisfactory1290088.0

Element Data

Source: National Bridge Elements dataset, 2019 edition. This feature is experimental.
Steel Girder/Beamlinear ft.734734000
Reinforced Concrete Decksq. ft.12,84412,54129760
Reinforced Concrete Abutmentlinear ft.3032729220
Other Material Abutmentlinear ft.3032921100
Reinforced Concrete Pier Caplinear ft.3193001270
Strip Seal Jointlinear ft.29901491500
Compression Jointlinear ft.1211002100
Elastomeric Bearingeach1601600
Fixed Bearingeach1601600
Bridge Rail
Reinforced Concrete Bridge Raillinear ft.482048200