+40.23909, -95.42255
40°14'21" N, 95°25'21" W


Source: National Bridge Inventory. Information not verified; use at your own risk.
Name:IS 29 N over TARKIO RVR
Structure number:2357
Old structure number:A2706 3 (from 1992 edition)
Location:S 28 T 63 N R 40 W
Purpose:Carries highway over waterway
Route classification:Principal Arterial - Interstate (Rural) [01]
Length of largest span:85.0 ft. [25.9 m]
Total length:443.9 ft. [135.3 m]
Roadway width between curbs:39.4 ft. [12.0 m]
Deck width edge-to-edge:42.3 ft. [12.9 m]
Skew angle:45°
Owner:State Highway Agency [01]
Year built:1973
Historic significance:Bridge is not eligible for the National Register of Historic Places [5]
Design load:MS 18+Mod / HS 20+Mod [6]
Number of main spans:3
Main spans material:Steel continuous [4]
Main spans design:Stringer/Multi-beam or girder [02]
Deck type:Concrete Cast-in-Place [1]
Wearing surface:Bituminous [6]

Latest Available Inspection: March 2017

Good/Fair/Poor Condition:Fair
Status:Open, no restriction [A]
Average daily traffic:6,495 [as of 2016]
Truck traffic:35% of total traffic
Deck condition:Satisfactory [6 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:Equal to present desirable criteria [8]
Roadway alignment appraisal:Equal to present desirable criteria [8]
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 the assessed or calculated scour condition. [8]
Sufficiency rating:95.5

Previous Inspections

DateConditionDeckSuperstructureSubstructureADTSuff. Rating
March 2017FairSatisfactorySatisfactoryGood649595.5
March 2015FairFairSatisfactoryGood683994.5
March 2013FairFairGoodGood645994.5
November 2011FairFairGoodGood569895.9
December 2009FairFairGoodGood710396.1
December 2008FairSatisfactoryGoodGood710397.1
January 2007FairSatisfactoryGoodGood561997.2
October 2004FairSatisfactoryGoodGood629697.2
January 2003FairSatisfactoryGoodGood674495.1
October 2001FairSatisfactoryGoodGood658695.2
November 1999FairSatisfactoryGoodGood538794.7
November 1998FairSatisfactoryGoodGood538794.7
November 1997FairSatisfactoryGoodGood538794.7
December 1996FairSatisfactoryGoodGood585494.7
November 1995FairSatisfactorySatisfactoryGood585496.8
December 1994GoodGoodGoodGood562996.8
November 1993GoodGoodGoodVery Good533996.8
October 1992GoodGoodGoodVery Good533996.8
January 1992GoodGoodGoodVery Good512496.8

Element Data

Source: National Bridge Elements dataset, 2019 edition. This feature is experimental.
Steel Girder/Beamlinear ft.2,23102,221100
Steel Protective Coatingsq. ft.20,928020,5763520
Reinforced Concrete Decksq. ft.18,87010,8195,6612,3900
Wearing Surfacessq. ft.17,53817,538000
Reinforced Concrete Columneach66000
Reinforced Concrete Abutmentlinear ft.1647153400
Concrete Protective Coatingsq. ft.280002800
Steel Pileeach2802800
Steel Protective Coatingsq. ft.1,12009401800
Reinforced Concrete Pier Caplinear ft.330330000
Strip Seal Jointlinear ft.108108000
Movable Bearingeach30020100
Steel Protective Coatingsq. ft.30015150
Fixed Bearingeach20101000
Steel Protective Coatingsq. ft.20101000
Bridge Rail
Reinforced Concrete Bridge Raillinear ft.88804444440