+45.79176, -110.04229
45°47'30" N, 110°02'32" W


Source: National Bridge Inventory. Information not verified; use at your own risk.
Name:I 90 over SEP COUNTY ROAD
Structure number:I00090363+05672
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:Satisfactory [6 out of 9]
Superstructure condition:Satisfactory [6 out of 9]
Substructure condition:Fair [5 out of 9]
Structural appraisal:Somewhat better than minimum adequacy to tolerate being left in place as is [5]
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:82.7

Previous Inspections

DateConditionDeckSuperstructureSubstructureADTSuff. Rating
September 2017FairSatisfactorySatisfactoryFair519282.7
September 2015FairSatisfactorySatisfactoryFair841082.0
September 2013FairSatisfactorySatisfactoryFair841082.5
September 2011FairSatisfactoryGoodFair841082.5
September 2009FairSatisfactoryGoodFair837082.5
September 2007GoodGoodGoodGood1031093.5
November 2005GoodGoodGoodGood963093.5
September 2003GoodGoodGoodGood791093.6
February 2002GoodGoodGoodGood791093.6
March 2000GoodGoodGoodGood740093.6
April 1998GoodGoodGoodGood705093.7
February 1996GoodGoodGoodGood587093.7
April 1994GoodGoodGoodGood615093.5
January 1992GoodGoodVery GoodGood625093.5

Element Data

Source: National Bridge Elements dataset, 2019 edition. This feature is experimental.
Reinforced Concrete Columneach60600
Reinforced Concrete Abutmentlinear ft.8985040
Reinforced Concrete Pier Caplinear ft.8585000
Bridge Rail
Reinforced Concrete Bridge Raillinear ft.1611293200