S 1 over INT I 90


+46.09559, -112.79294
46°05'44" N, 112°47'35" W


Source: National Bridge Inventory. Information not verified; use at your own risk.
Name:S 1 over INT I 90
Structure number:P00019000+00001
Purpose:Carries highway overpass over highway
Route classification:Minor Arterial (Rural) [06]
Length of largest span:56.1 ft. [17.1 m]
Total length:275.9 ft. [84.1 m]
Roadway width between curbs:38.1 ft. [11.6 m]
Deck width edge-to-edge:40.7 ft. [12.4 m]
Vertical clearance below bridge:16.4 ft. [5.0 m]
Skew angle:20°
Owner:State Highway Agency [01]
Year built:1964
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:5
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: June 2018

Good/Fair/Poor Condition:Fair
Status:Open, no restriction [A]
Average daily traffic:3,973 [as of 2017]
Truck traffic:3% of total traffic
Deck condition:Satisfactory [6 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:Somewhat better than minimum adequacy to tolerate being left in place as is [5]
Underclearances appraisal:Basically intolerable requiring high priority of corrrective action [3]
Roadway alignment appraisal:Better than present minimum criteria [7]
Scour condition:Bridge not over waterway. [N]
Sufficiency rating:93.0

Previous Inspections

DateConditionDeckSuperstructureSubstructureADTSuff. Rating
June 2018FairSatisfactoryGoodSatisfactory397393.0
June 2016FairSatisfactoryGoodSatisfactory368093.0
June 2014FairGoodGoodSatisfactory316095.0
June 2012FairGoodGoodSatisfactory316095.0
June 2010GoodGoodGoodGood316095.0
May 2008GoodGoodGoodGood305095.0
April 2006GoodVery GoodVery GoodGood396095.0
March 2002FairSatisfactoryVery GoodGood342095.0
January 1998FairSatisfactoryVery GoodGood322095.0
January 1994FairSatisfactoryVery GoodGood264093.0
June 1992FairSatisfactoryVery GoodVery Good247093.0
February 1990GoodGoodVery GoodVery Good258093.0

Element Data

Source: National Bridge Elements dataset, 2019 edition. This feature is experimental.
Prestressed Concrete Girder/Beamlinear ft.1,6571,654210
Reinforced Concrete Decksq. ft.11,25911,02423050
Reinforced Concrete Columneach86020
Reinforced Concrete Abutmentlinear ft.112110200
Reinforced Concrete Pier Caplinear ft.315311040
Assembly with Sealeach151151000
Movable Bearingeach1201200
Steel Protective Coatingsq. ft.1212000
Fixed Bearingeach4804800
Steel Protective Coatingsq. ft.4847001
Bridge Rail
Reinforced Concrete Bridge Raillinear ft.55140614500