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N CLARK ST over MAIN BR CHICAGO RIV

Map 

Coordinates:
+41.88774, -87.63102
41°53'16" N, 87°37'52" W
Source: National Bridge Inventory
Information not verified. Use at your own risk.

Facts 

Name:N CLARK ST over MAIN BR CHICAGO RIV
Structure number:016601000000000
Old structure number:000016601027335 (from 1992 edition)
Location:307 N CLARK
Purpose:Carries highway over waterway
Route classification:Collector (Urban) [17]
Length of largest span:245.4 ft. [74.8 m]
Total length:346.1 ft. [105.5 m]
Roadway width between curbs:38.1 ft. [11.6 m]
Deck width edge-to-edge:71.9 ft. [21.9 m]
Vertical clearance below bridge:20.0 ft. [6.1 m]
Owner:City or Municipal Highway Agency [04]
Year built:1929
Year reconstructed:1985
Historic significance:Bridge is possibly eligible for the National Register of Historic Places [3]
Design load:MS 18 / HS 20 [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:9,200 [as of 2014]
Truck traffic:11% of total traffic
Deck condition:Fair [5 out of 9]
Superstructure condition:Poor [4 out of 9]
Substructure condition:Fair [5 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:Better than present minimum criteria [7]
Channel protection:Bank protection is in need of minor repairs. River control devices and embankment protection have a little minor damage. Banks and/or channel have minor amounts of drift. [7]
Pier/abutment protection:In place and functioning [2]
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:Structurally deficient [1]
Sufficiency rating:48.0
Recommended work:Replacement of bridge or other structure because of substandard load carrying capacity or substantial bridge roadway geometry. [31]
Estimated cost of work:$2,111,000

Previous Inspections 

DateSuff. ratingEvaluationDeckSuper.Sub.ADT
October 201448.0Structurally deficientFairPoorFair9200
November 201264.0Functionally obsoleteFairFairFair12700
December 201064.0Functionally obsoleteFairFairFair12700
November 200864.0Functionally obsoleteFairFairFair14800
October 200664.0Functionally obsoleteFairFairFair14800
October 200464.0Functionally obsoleteFairFairFair16300
October 200264.0Functionally obsoleteFairFairFair16300
November 200064.0Functionally obsoleteFairFairFair15909
August 199848.0Structurally deficientFairPoorFair15909
May 199679.0Functionally obsoleteFairFairFair-
May 199479.0Functionally obsoleteFairFairFair-
September 199291.0Not deficientSatisfactorySatisfactorySatisfactory-
August 199091.0Not deficientGoodSatisfactorySatisfactory-