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I 90 over CLARK FORK RIVER

Map

Coordinates:
+46.70133, -113.24195
46°42'05" N, 113°14'31" W

Facts

Source: National Bridge Inventory. Information not verified; use at your own risk.
Name:I 90 over CLARK FORK RIVER
Structure number:I00090148+04361
Location:5M W DRUMMOND
Purpose:Carries highway over waterway
Route classification:Principal Arterial - Interstate (Rural) [01]
Length of largest span:86.9 ft. [26.5 m]
Total length:255.9 ft. [78.0 m]
Roadway width between curbs:76.1 ft. [23.2 m]
Deck width edge-to-edge:78.1 ft. [23.8 m]
Skew angle:
Owner:State Highway Agency [01]
Year built:1970
Historic significance:Bridge is not eligible for the National Register of Historic Places [5]
Design load:MS 18 / HS 20 [5]
Number of main spans:4
Main spans material:Prestressed concrete [5]
Main spans 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: October 2017

Good/Fair/Poor Condition:Poor
Status:Open, no restriction [A]
Average daily traffic:9,241 [as of 2016]
Truck traffic:20% of total traffic
Deck condition:Poor [4 out of 9]
Superstructure condition:Good [7 out of 9]
Substructure condition:Good [7 out of 9]
Structural appraisal:Better than present minimum criteria [7]
Deck geometry appraisal:Superior to present desirable criteria [9]
Water adequacy appraisal:Superior to present desirable criteria [9]
Roadway alignment appraisal:Equal to present desirable criteria [8]
Channel protection:Banks are protected or well vegetated. River control devices such as spur dikes and embankment protection are not required or are in a stable condition. [8]
Scour condition:Bridge foundations determined to be stable for the assessed or calculated scour condition. [8]
Sufficiency rating:94.6

Previous Inspections

DateConditionDeckSuperstructureSubstructureADTSuff. Rating
October 2017PoorPoorGoodGood924194.6
October 2013FairSatisfactoryGoodGood891096.6
October 2009FairSatisfactoryGoodGood739096.7
August 2005FairVery GoodSatisfactoryGood914097.6
August 2001FairVery GoodSatisfactoryGood757097.6
August 1997FairVery GoodSatisfactoryGood868097.6
October 1994FairGoodSatisfactoryGood637097.5
August 1991FairGoodSatisfactoryGood660097.5

Element Data

Source: National Bridge Elements dataset, 2018 edition. This feature is experimental.
ElementUnitsQuantity1-Good2-Fair3-Poor4-Serious
Superstructure
Prestressed Concrete Girder/Beamlinear ft.2,5592,559000
Deck
Reinforced Concrete Decksq. ft.19,96715,4624,2352700
Concrete Protective Coatingsq. ft.19,96767019,9000
Substructure
Reinforced Concrete Columneach1110010
Reinforced Concrete Abutmentlinear ft.187187000
Reinforced Concrete Pier Caplinear ft.246245010
Joints
Compression Jointlinear ft.95055400
Bearings
Movable Bearingeach2002000
Steel Protective Coatingsq. ft.2012008
Fixed Bearingeach6006000
Steel Protective Coatingsq. ft.6054006
Bridge Rail
Steel or Aluminum Bridge Raillinear ft.512005120
Steel Protective Coatingsq. ft.1,06764000427
Reinforced Concrete Bridge Raillinear ft.2562060500