OLD ILL 121 over MACKINAW RIVER

Map

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

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]`

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

Date	Condition	Deck	Superstructure	Substructure	ADT	Suff. Rating
June 2018	Poor	Serious	Critical	Fair	125	25.4
June 2017	Poor	Poor	Critical	Satisfactory	100	33.0
June 2016	Poor	Poor	Critical	Satisfactory	100	33.0
June 2015	Poor	Poor	Critical	Satisfactory	100	33.0
June 2014	Poor	Poor	Critical	Satisfactory	100	33.0
June 2013	Poor	Poor	Critical	Satisfactory	75	33.0
June 2012	Poor	Poor	Critical	Satisfactory	75	33.0
June 2011	Poor	Poor	Critical	Satisfactory	75	33.0
June 2010	Poor	Poor	Critical	Satisfactory	75	33.0
July 2009	Poor	Poor	Critical	Satisfactory	75	33.0
January 2009	Poor	Poor	Serious	Satisfactory	75	33.0
January 2008	Poor	Critical	Critical	Fair	75	31.0
January 2007	Poor	Critical	Critical	Poor	75	31.0
January 2006	Poor	Critical	Critical	Poor	75	31.0
January 2005	Poor	Serious	Serious	Poor	75	31.0
January 2004	Poor	Fair	Serious	Poor	225	29.5
January 2003	Poor	Fair	Serious	Poor	225	29.5
January 2002	Poor	Fair	Serious	Poor	225	29.5
January 2001	Poor	Fair	Satisfactory	Serious	225	29.5
2000	Poor	Fair	Satisfactory	Poor	225	40.3
February 1999	Poor	Fair	Satisfactory	Poor	225	40.3
March 1997	Poor	Fair	Satisfactory	Poor	250	40.3
January 1996	Fair	Satisfactory	Satisfactory	Fair	250	49.8
February 1995	Poor	Good	Poor	Satisfactory	250	40.8
January 1994	Poor	Good	Poor	Satisfactory	250	40.8
January 1993	Poor	Good	Poor	Satisfactory	250	40.8
February 1992	Poor	Good	Poor	Satisfactory	250	40.8