+45.79153, -110.04204
45°47'30" N, 110°02'31" W


Source: National Bridge Inventory. Information not verified; use at your own risk.
Name:I 90 over SEP COUNTY ROAD
Structure number:I00090363+05671
Location:5M W BIG TIMBER
Purpose:Carries highway over highway
Route classification:Principal Arterial - Interstate (Rural) [01]
Length of largest span:29.9 ft. [9.1 m]
Total length:80.1 ft. [24.4 m]
Roadway width between curbs:41.3 ft. [12.6 m]
Deck width edge-to-edge:44.3 ft. [13.5 m]
Vertical clearance below bridge:16.4 ft. [5.0 m]
Owner:State Highway Agency [01]
Year built:1981
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:3
Main spans material:Concrete continuous [2]
Main spans design:Slab [01]
Deck type:Concrete Cast-in-Place [1]
Wearing surface:Monolithic Concrete (concurrently placed with structural deck) [1]

Latest Available Inspection: September 2017

Good/Fair/Poor Condition:Fair
Status:Open, no restriction [A]
Average daily traffic:5,192 [as of 2016]
Truck traffic:17% of total traffic
Deck condition:Good [7 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:Better than present minimum criteria [7]
Underclearances appraisal:Basically intolerable requiring high priority of corrrective action [3]
Roadway alignment appraisal:Equal to present desirable criteria [8]
Scour condition:Bridge not over waterway. [N]
Sufficiency rating:93.7

Previous Inspections

DateConditionDeckSuperstructureSubstructureADTSuff. Rating
September 2017FairGoodGoodSatisfactory519293.7
September 2015FairGoodGoodSatisfactory841093.2
September 2013FairGoodSatisfactorySatisfactory841093.6
September 2011FairSatisfactorySatisfactorySatisfactory841093.6
September 2009FairSatisfactorySatisfactorySatisfactory837093.6
September 2007FairSatisfactorySatisfactorySatisfactory1031093.5
November 2005FairSatisfactorySatisfactorySatisfactory963093.5
September 2003FairGoodSatisfactorySatisfactory791093.6
February 2002FairGoodSatisfactoryGood791093.6
March 2000FairGoodSatisfactoryGood740093.6
April 1998FairGoodSatisfactoryGood705093.7
February 1996FairSatisfactorySatisfactoryGood587093.7
April 1994FairSatisfactorySatisfactoryGood615093.5
January 1992GoodGoodVery GoodGood625093.5

Element Data

Source: National Bridge Elements dataset, 2019 edition. This feature is experimental.
Reinforced Concrete Columneach64200
Reinforced Concrete Abutmentlinear ft.8978650
Reinforced Concrete Pier Caplinear ft.8585000
Bridge Rail
Reinforced Concrete Bridge Raillinear ft.1613212900
Wearing Surfacessq. ft.3,5413,541000