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MICHIGAN AVE over MAIN BR CHICAGO RIV

Map

Coordinates:
+41.88851, -87.62433
41°53'19" N, 87°37'28" W

Facts

Source: National Bridge Inventory. Information not verified; use at your own risk.
Name:MICHIGAN AVE over MAIN BR CHICAGO RIV
Structure number:016603500000000
Old structure number:000016603527325 (from 1992 edition)
Location:365 N MCHIGAN AVE
Purpose:Carries highway over waterway
Route classification:Other Principal Arterial (Urban) [14]
Length of largest span:255.9 ft. [78.0 m]
Total length:399.0 ft. [121.6 m]
Roadway width between curbs:64.0 ft. [19.5 m]
Deck width edge-to-edge:91.9 ft. [28.0 m]
Vertical clearance above deck:13.5 ft. [4.1 m]
Vertical clearance below bridge:16.1 ft. [4.9 m]
Owner:City or Municipal Highway Agency [04]
Year built:1920
Historic significance:Bridge is on the National Register of Historic Places [1]
Design load:MS 18 / HS 20 [5]
Main span material:Steel [3]
Main span design:Movable - Bascule [16]
Deck type:Closed Grating [4]
Wearing surface:Other [9]

Latest Available Inspection: September 2015

Good/Fair/Poor Condition:Poor
Status:Open, no restriction [A]
Average daily traffic:39,700 [as of 2014]
Truck traffic:5% of total traffic
Deck condition:Satisfactory [6 out of 9]
Superstructure condition:Poor [4 out of 9]
Substructure condition:Satisfactory [6 out of 9]
Structural appraisal:Meets minimum tolerable limits to be left in place as is [4]
Deck geometry appraisal:Basically intolerable requiring high priority of replacement [2]
Water adequacy appraisal:Superior to present desirable criteria [9]
Roadway alignment appraisal:Equal to present desirable criteria [8]
Channel protection:There are no noticeable or noteworthy deficiencies which affect the condition of the channel. [9]
Pier/abutment protection:In place but in a deteriorated condition [3]
Scour condition:Bridge foundations determined to be stable for the assessed or calculated scour condition. [8]
Operating rating:48.5 tons [44.1 metric tons]
Inventory rating:35.6 tons [32.4 metric tons]
Sufficiency rating:43.5
Recommended work:Replacement of bridge or other structure because of substandard load carrying capacity or substantial bridge roadway geometry. [31]
Estimated cost of work:$3,618,000

Previous Inspections

DateSuff. RatingConditionDeckSuperstructureSubstructureSD/FOADT
September 201543.5PoorSatisfactoryPoorSatisfactorySD39700
October 201357.0FairSatisfactoryFairSatisfactoryFO39700
October 201160.2FairSatisfactoryFairSatisfactoryFO37900
October 200971.6FairSatisfactorySatisfactorySatisfactoryFO37900
October 200771.9FairSatisfactorySatisfactorySatisfactoryFO33300
November 200571.9FairSatisfactorySatisfactorySatisfactoryFO33300
October 200371.3FairSatisfactorySatisfactorySatisfactoryFO43700
November 200171.9FairSatisfactorySatisfactorySatisfactoryFO33909
August 199971.9FairSatisfactorySatisfactorySatisfactoryFO33900
August 199771.9FairSatisfactorySatisfactorySatisfactoryFO33900
September 199570.6FairGoodVery GoodSatisfactoryFO33900
March 199470.6GoodExcellentVery GoodVery GoodFO33900
January 199215.6PoorSeriousPoorSeriousSD33900
January 199015.6PoorSeriousPoorSeriousSD33900