Share:

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 2014 

Status:Open, no restriction [A]
Average daily traffic:5,700 [as of 2014]
Truck traffic:11% of total traffic
Deck condition:Satisfactory [6 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]
Evaluation:Functionally obsolete [2]
Sufficiency rating:65.0
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. ratingEvaluationDeckSuper.Sub.ADT
October 201465.0Functionally obsoleteSatisfactoryFairSatisfactory5700
December 201265.0Functionally obsoleteSatisfactoryFairSatisfactory13100
December 201065.0Functionally obsoleteSatisfactoryFairSatisfactory13100
November 200865.0Functionally obsoleteSatisfactoryFairSatisfactory15200
October 200665.0Functionally obsoleteSatisfactoryFairSatisfactory15200
October 200449.0Structurally deficientSatisfactoryPoorSatisfactory25000
October 200265.0Functionally obsoleteSatisfactoryFairSatisfactory25000
November 200065.0Functionally obsoleteSatisfactoryFairSatisfactory5509
August 199848.0Structurally deficientFairPoorSatisfactory5509
May 199664.0Structurally deficientGoodPoorGood-
May 199491.0Functionally obsoleteGoodGoodGood-
September 199286.0Functionally obsoleteGoodGoodGood-
February 199286.0Functionally obsoleteGoodGoodGood-