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ROUTE 497 over STURGEON RIVER

Map

Coordinates:
+45.85074, -86.66881
45°51'03" N, 86°40'08" W

Facts

Source: National Bridge Inventory. Information not verified; use at your own risk.
Name:ROUTE 497 over STURGEON RIVER
Structure number:000000000002139
Old structure number:21200040000B010 (from 1992 edition)
Location:.5 MI N OF NAHMA JCT
Purpose:Carries highway over waterway
Route classification:Minor Collector (Rural) [08]
Length of largest span:112.9 ft. [34.4 m]
Total length:119.1 ft. [36.3 m]
Roadway width between curbs:26.9 ft. [8.2 m]
Deck width edge-to-edge:29.5 ft. [9.0 m]
Owner:County Highway Agency [02]
Year built:2008
Historic significance:Bridge is not eligible for the National Register of Historic Places [5]
Design load:MS 18+Mod / HS 20+Mod [6]
Main span material:Steel [3]
Main span design:Truss - Thru [10]
Deck type:Concrete Cast-in-Place [1]
Wearing surface:Integral Concrete (separate non-modified layer of concrete added to structural deck) [2]

Latest Available Inspection: July 2017

Good/Fair/Poor Condition:Fair
Status:Open, no restriction [A]
Average daily traffic:50 [as of 2006]
Truck traffic:1% 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:Equal to present minimum criteria [6]
Water adequacy appraisal:Better than present minimum criteria [7]
Roadway alignment appraisal:Equal to present minimum criteria [6]
Channel protection:Bank is beginning to slump. River control devices and embankment protection have widespread minor damage. There is minor stream bed movement evident. Debris is restricting the channel slightly. [6]
Scour condition:Bridge foundations determined to be stable for assessed or calculated scour condition. [5]
Sufficiency rating:95.0

Previous Inspections

DateConditionDeckSuperstructureSubstructureADTSuff. Rating
July 2017FairGoodSatisfactoryGood5095.0
July 2015FairGoodSatisfactoryGood5095.0
July 2013FairGoodSatisfactoryGood5095.0
July 2011FairGoodSatisfactoryVery Good5095.0
July 2009FairGoodSatisfactoryExcellent5095.0
November 2008GoodExcellentExcellentExcellent5095.0
July 2007Poor--Imminent Failure5035.8
August 2005PoorCriticalCriticalPoor2408.4
October 2003PoorCriticalCriticalPoor2407.9
September 2001PoorCriticalCriticalPoor2407.9
July 1999PoorCriticalCriticalPoor2407.9
May 1997PoorCritical-Very Good2407.9
May 1995PoorCriticalCriticalPoor2407.8
October 1992PoorCriticalCriticalPoor2407.8
August 1990PoorCriticalCriticalPoor2407.8