M-28 over ROCK RIVER


+46.46382, -86.91603
46°27'50" N, 86°54'58" W


Source: National Bridge Inventory. Information not verified; use at your own risk.
Name:M-28 over ROCK RIVER
Structure number:000000000000046
Old structure number:02102041000B030 (from 1992 edition)
Location:5.1 MI NW OF AU TRAIN
Purpose:Carries highway over waterway
Route classification:Principal Arterial - Other (Rural) [02]
Length of largest span:40.0 ft. [12.2 m]
Total length:40.0 ft. [12.2 m]
Roadway width between curbs:47.9 ft. [14.6 m]
Deck width edge-to-edge:49.5 ft. [15.1 m]
Owner:State Highway Agency [01]
Year built:1932
Year reconstructed:1975
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:Stringer/Multi-beam or girder [02]
Deck type:Concrete Cast-in-Place [1]
Wearing surface:Monolithic Concrete (concurrently placed with structural deck) [1]

Latest Available Inspection: May 2017

Good/Fair/Poor Condition:Fair
Status:Open, no restriction [A]
Average daily traffic:3,093 [as of 2007]
Truck traffic:10% of total traffic
Deck condition:Very Good [8 out of 9]
Superstructure condition:Good [7 out of 9]
Substructure condition:Satisfactory [6 out of 9]
Structural appraisal:Equal to present minimum criteria [6]
Deck geometry appraisal:Superior to present desirable criteria [9]
Water adequacy appraisal:Equal to present desirable criteria [8]
Roadway alignment appraisal:Better than present minimum criteria [7]
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:Bridge foundations determined to be stable for the assessed or calculated scour condition. [8]
Sufficiency rating:90.8
Recommended work:Bridge deck replacement with only incidental widening. [37]
Estimated cost of work:$7,000

Previous Inspections

DateConditionDeckSuperstructureSubstructureADTSuff. Rating
May 2017FairVery GoodGoodSatisfactory309390.8
May 2015FairVery GoodGoodSatisfactory309390.8
May 2013FairVery GoodGoodSatisfactory309390.8
May 2011FairVery GoodSatisfactorySatisfactory309390.8
May 2009GoodVery GoodGoodGood309390.8
May 2007GoodVery GoodGoodGood362289.2
May 2005GoodVery GoodGoodGood340089.8
May 2003GoodVery GoodGoodGood340089.7
May 2001GoodVery GoodGoodGood340089.7
May 1999GoodVery GoodGoodGood340089.7
July 1997GoodVery GoodGoodGood340087.7
October 1995GoodGoodGoodGood330088.0
September 1993FairVery GoodGoodFair330075.5
September 1991GoodVery GoodGoodGood330088.0

Element Data

Source: National Bridge Elements dataset, 2019 edition. This feature is experimental.
Steel Girder/Beamlinear ft.4003851500
Steel Protective Coatingsq. ft.2,5002,37512500
Reinforced Concrete Decksq. ft.2,0001,9901000
Wearing Surfacessq. ft.2,0001,998020
Reinforced Concrete Abutmentlinear ft.1308236120
Pourable Jointlinear ft.9200920
Movable Bearingeach1010000
Fixed Bearingeach1010000
Bridge Rail
Reinforced Concrete Bridge Raillinear ft.8075230