THROOP ST over I- 57


+41.69904, -87.65474
41°41'57" N, 87°39'17" W
Source: National Bridge Inventory
Information not verified. Use at your own risk.


Name:THROOP ST over I- 57
Structure number:016203200000000
Old structure number:000016203226238 (from 1992 edition)
Location:1.5 M SW IL 1
Purpose:Carries highway over highway
Route classification:Local (Urban) [19]
Length of largest span:136.5 ft. [41.6 m]
Total length:263.5 ft. [80.3 m]
Roadway width between curbs:45.9 ft. [14.0 m]
Deck width edge-to-edge:63.0 ft. [19.2 m]
Vertical clearance below bridge:15.7 ft. [4.8 m]
Skew angle:45°
Owner:State Highway Agency [01]
Year built:1965
Year reconstructed:2004
Historic significance:Bridge is not eligible for the National Register of Historic Places [5]
Design load:MS 18 / HS 20 [5]
Number of main spans:2
Main spans material:Steel continuous [4]
Main spans design:Stringer/Multi-beam or girder [02]
Deck type:Concrete Cast-in-Place [1]

Latest Available Inspection: May 2014 

Status:Open, no restriction [A]
Average daily traffic:5,000 [as of 1997]
Truck traffic:3% of total traffic
Deck condition:Good [7 out of 9]
Superstructure condition:Satisfactory [6 out of 9]
Substructure condition:Good [7 out of 9]
Structural appraisal:Equal to present minimum criteria [6]
Deck geometry appraisal:Basically intolerable requiring high priority of replacement [2]
Underclearances appraisal:Meets minimum tolerable limits to be left in place as is [4]
Roadway alignment appraisal:Equal to present desirable criteria [8]
Scour condition:Bridge not over waterway. [N]
Operating rating:72.4 tons [65.8 metric tons]
Inventory rating:43.5 tons [39.5 metric tons]
Evaluation:Functionally obsolete [2]
Sufficiency rating:77.0
Recommended work:Replacement of bridge or other structure because of substandard load carrying capacity or substantial bridge roadway geometry. [31]
Estimated cost of work:$3,858,000

Previous Inspections 

DateSuff. ratingEvaluationDeckSuper.Sub.ADT
May 201477.0Functionally obsoleteGoodSatisfactoryGood5000
August 201279.0Not deficientGoodSatisfactoryGood5000
September 201079.0Not deficientGoodSatisfactoryGood5009
November 200879.0Not deficientGoodSatisfactoryGood5009
December 200679.0Not deficientVery GoodSatisfactoryGood5009
January 200579.0Not deficientExcellentSatisfactoryGood5009
August 200365.0Structurally deficientPoorSatisfactoryFair5009
August 200265.0Structurally deficientPoorSatisfactoryFair5009
August 200165.0Structurally deficientPoorSatisfactoryFair5009
December 199965.0Structurally deficientPoorSatisfactoryFair5009
February 199965.0Structurally deficientPoorSatisfactoryFair5009
March 199765.0Structurally deficientPoorSatisfactoryFair5009
November 199580.0Structurally deficientPoorSatisfactoryFair-
January 199480.0Structurally deficientPoorSatisfactoryFair-
June 199380.0Structurally deficientPoorSatisfactoryFair-
February 199280.0Structurally deficientPoorGoodFair-