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DEARBORN ST over MAIN BR CHICAGO RIV

Map 

Coordinates:
+41.90120, -87.62990
41°54'04" N, 87°37'48" W
Source: National Bridge Inventory
Information not verified. Use at your own risk.

Facts 

Name:DEARBORN ST over MAIN BR CHICAGO RIV
Structure number:016601400000000
Old structure number:000016601427333 (from 1992 edition)
Location:100 W & 307 N
Purpose:Carries highway over waterway
Route classification:Collector (Urban) [17]
Length of largest span:234.9 ft. [71.6 m]
Total length:340.9 ft. [103.9 m]
Roadway width between curbs:56.1 ft. [17.1 m]
Deck width edge-to-edge:86.0 ft. [26.2 m]
Vertical clearance below bridge:16.1 ft. [4.9 m]
Owner:City or Municipal Highway Agency [04]
Year built:1963
Historic significance:Bridge is not eligible for the National Register of Historic Places [5]
Main span material:Steel [3]
Main span design:Movable - Bascule [16]
Deck type:Open Grating [3]
Wearing surface:Other [9]

Latest Available Inspection: October 2016 

Good/Fair/Poor Condition:Poor
Status:Open, no restriction [A]
Average daily traffic:5,700 [as of 2014]
Truck traffic:11% of total traffic
Deck condition:Poor [4 out of 9]
Superstructure condition:Fair [5 out of 9]
Substructure condition:Satisfactory [6 out of 9]
Structural appraisal:Somewhat better than minimum adequacy to tolerate being left in place as is [5]
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:Banks are protected or well vegetated. River control devices such as spur dikes and embankment protection are not required or are in a stable condition. [8]
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:48.8 tons [44.4 metric tons]
Inventory rating:35.6 tons [32.4 metric tons]
Sufficiency rating:62.0
Recommended work:Replacement of bridge or other structure because of substandard load carrying capacity or substantial bridge roadway geometry. [31]
Estimated cost of work:$3,188,000

Previous Inspections 

DateSuff. RatingConditionDeckSuperstructureSubstructureSD/FOADT
October 201662.0PoorPoorFairSatisfactorySD5700
October 201465.0FairSatisfactoryFairSatisfactoryFO5700
December 201265.0FairSatisfactoryFairSatisfactoryFO13100
December 201065.0FairSatisfactoryFairSatisfactoryFO13100
November 200865.0FairSatisfactoryFairSatisfactoryFO15200
October 200665.0FairSatisfactoryFairSatisfactoryFO15200
October 200449.0PoorSatisfactoryPoorSatisfactorySD25000
October 200265.0FairSatisfactoryFairSatisfactoryFO25000
November 200065.0FairSatisfactoryFairSatisfactoryFO5509
August 199848.0PoorFairPoorSatisfactorySD5509
May 199664.0PoorGoodPoorGoodSD-
May 199491.0GoodGoodGoodGoodFO-
September 199286.0GoodGoodGoodGoodFO-
February 199286.0GoodGoodGoodGoodFO-