+38.37722, -89.79194
38°22'38" N, 89°47'31" W


Source: National Bridge Inventory. Information not verified; use at your own risk.
Name:ILL 15 & 4 over KASKASKIA RIVER
Structure number:082007700000000
Old structure number:000082007717948 (from 1992 edition)
Location:0.2 M E JCT ILL 4
Purpose:Carries highway over waterway
Route classification:Minor Arterial (Rural) [06]
Length of largest span:200.5 ft. [61.1 m]
Total length:912.4 ft. [278.1 m]
Roadway width between curbs:31.2 ft. [9.5 m]
Deck width edge-to-edge:34.1 ft. [10.4 m]
Owner:State Highway Agency [01]
Year built:1946
Year reconstructed:2013
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:Truss - Thru [10]
Deck type:Concrete Cast-in-Place [1]

Latest Available Inspection: February 2018

Good/Fair/Poor Condition:Poor
Status:Open, no restriction [A]
Average daily traffic:4,750 [as of 2017]
Truck traffic:26% of total traffic
Deck condition:Good [7 out of 9]
Superstructure condition:Poor [4 out of 9]
Substructure condition:Good [7 out of 9]
Structural appraisal:Meets minimum tolerable limits to be left in place as is [4]
Deck geometry appraisal:Meets minimum tolerable limits to be left in place as is [4]
Water adequacy appraisal:Superior to present desirable criteria [9]
Roadway alignment appraisal:Equal to present desirable criteria [8]
Channel protection:Bank protection is being eroded. River control devices and/or embankment have major damage. Trees and rush restrict the channel. [5]
Scour condition:Bridge foundations determined to be stable for assessed or calculated scour condition. [5]
Sufficiency rating:45.8

Previous Inspections

DateConditionDeckSuperstructureSubstructureADTSuff. Rating
February 2018PoorGoodPoorGood475045.8
February 2017PoorGoodPoorGood445045.8
February 2016PoorGoodPoorGood445045.8
March 2014PoorVery GoodPoorGood470045.9
March 2013PoorSatisfactoryPoorPoor555041.0
March 2012PoorSatisfactoryPoorPoor555045.9
March 2011PoorSatisfactoryPoorPoor540045.9
March 2010PoorSatisfactoryPoorPoor540045.9
March 2008FairGoodSatisfactoryFair500061.9
March 2006FairGoodSatisfactorySatisfactory470072.9
March 2004FairVery GoodSatisfactorySatisfactory475072.9
September 2002FairVery GoodSatisfactorySatisfactory445073.6
September 2000FairVery GoodSatisfactorySatisfactory450073.4
September 1998FairVery GoodSatisfactorySatisfactory450073.4
September 1996FairVery GoodSatisfactoryFair460061.9
January 1996FairVery GoodSatisfactoryFair460058.1
April 1994FairVery GoodSatisfactorySatisfactory390069.1
January 1994FairVery GoodSatisfactoryFair390057.1
March 1992FairVery GoodSatisfactoryFair330065.0
February 1991FairExcellentSatisfactoryFair330066.2