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LASALLE STREET over TROLLEY CAR TUNNEL

Map 

Coordinates:
+41.90914, -87.63308
41°54'33" N, 87°37'59" W
Source: National Bridge Inventory
Information not verified. Use at your own risk.

Facts 

Name:LASALLE STREET over TROLLEY CAR TUNNEL
Structure number:016617500000000
Old structure number:000016617534527 (from 1992 edition)
Location:S. OF CHICAGO RIVER
Route classification:Minor Arterial (Urban) [16]
Length of largest span:103.4 ft. [31.5 m]
Total length:103.4 ft. [31.5 m]
Roadway width between curbs:25.6 ft. [7.8 m]
Deck width edge-to-edge:25.6 ft. [7.8 m]
Owner:City or Municipal Highway Agency [04]
Year built:1911
Year reconstructed:1942
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:Bituminous [6]

Latest Available Inspection: January 2015 

Status:Open, no restriction [A]
Average daily traffic:4,050 [as of 2014]
Truck traffic:10% of total traffic
Deck condition:Poor [4 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:Basically intolerable requiring high priority of replacement [2]
Roadway alignment appraisal:Equal to present desirable criteria [8]
Scour condition:Bridge not over waterway. [N]
Operating rating:48.5 tons [44.1 metric tons]
Inventory rating:35.6 tons [32.4 metric tons]
Evaluation:Structurally deficient [1]
Sufficiency rating:77.5

Previous Inspections 

DateSuff. ratingEvaluationDeckSuper.Sub.ADT
January 201577.5Structurally deficientPoorSatisfactorySatisfactory4050
January 201377.5Structurally deficientPoorSatisfactorySatisfactory4050
January 201176.4Structurally deficientPoorSatisfactorySatisfactory24900
June 200876.5Structurally deficientPoorSatisfactorySatisfactory24100
June 200676.5Structurally deficientPoorSatisfactorySatisfactory24100