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OLD ILL 121 over MACKINAW RIVER

Map

Coordinates:
+40.44038, -89.46846
40°26'25" N, 89°28'06" W

Facts

Source: National Bridge Inventory. Information not verified; use at your own risk.
Name:OLD ILL 121 over MACKINAW RIVER
Structure number:090008700000000
Old structure number:000090008725750 (from 1992 edition)
Location:N HOPEDALE JCT
Purpose:Carries highway over waterway
Route classification:Local (Rural) [09]
Length of largest span:174.9 ft. [53.3 m]
Total length:601.1 ft. [183.2 m]
Roadway width between curbs:24.0 ft. [7.3 m]
Deck width edge-to-edge:24.6 ft. [7.5 m]
Owner:State Highway Agency [01]
Year built:1932
Year reconstructed:1971
Historic significance:Bridge is eligible for the National Register of Historic Places [2]
Design load:M 13.5 / H 15 [2]
Main span material:Steel [3]
Main span design:Truss - Thru [10]
Deck type:Concrete Cast-in-Place [1]

Latest Available Inspection: June 2018

Good/Fair/Poor Condition:Poor
Status:Posted for load [P]
Average daily traffic:125 [as of 2018]
Truck traffic:3% of total traffic
Deck condition:Serious [3 out of 9]
Superstructure condition:Critical [2 out of 9]
Substructure condition:Fair [5 out of 9]
Structural appraisal:Basically intolerable requiring high priority of replacement [2]
Deck geometry appraisal:Somewhat better than minimum adequacy to tolerate being left in place as is [5]
Water adequacy appraisal:Equal to present minimum criteria [6]
Roadway alignment appraisal:Equal to present minimum criteria [6]
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]
Scour condition:Countermeasures have been installed to mitigate an existing problem with scour. [7]
Sufficiency rating:25.4
Recommended work:Bridge rehabilitation because of general structure deterioration or inadequate strength. [35]
Estimated cost of work:$1,325,000

Previous Inspections

DateConditionDeckSuperstructureSubstructureADTSuff. Rating
June 2018PoorSeriousCriticalFair12525.4
June 2017PoorPoorCriticalSatisfactory10033.0
June 2016PoorPoorCriticalSatisfactory10033.0
June 2015PoorPoorCriticalSatisfactory10033.0
June 2014PoorPoorCriticalSatisfactory10033.0
June 2013PoorPoorCriticalSatisfactory7533.0
June 2012PoorPoorCriticalSatisfactory7533.0
June 2011PoorPoorCriticalSatisfactory7533.0
June 2010PoorPoorCriticalSatisfactory7533.0
July 2009PoorPoorCriticalSatisfactory7533.0
January 2009PoorPoorSeriousSatisfactory7533.0
January 2008PoorCriticalCriticalFair7531.0
January 2007PoorCriticalCriticalPoor7531.0
January 2006PoorCriticalCriticalPoor7531.0
January 2005PoorSeriousSeriousPoor7531.0
January 2004PoorFairSeriousPoor22529.5
January 2003PoorFairSeriousPoor22529.5
January 2002PoorFairSeriousPoor22529.5
January 2001PoorFairSatisfactorySerious22529.5
2000PoorFairSatisfactoryPoor22540.3
February 1999PoorFairSatisfactoryPoor22540.3
March 1997PoorFairSatisfactoryPoor25040.3
January 1996FairSatisfactorySatisfactoryFair25049.8
February 1995PoorGoodPoorSatisfactory25040.8
January 1994PoorGoodPoorSatisfactory25040.8
January 1993PoorGoodPoorSatisfactory25040.8
February 1992PoorGoodPoorSatisfactory25040.8