I 15 over INT MAIN ST


+47.84879, -111.70498
47°50'56" N, 111°42'18" W


Source: National Bridge Inventory. Information not verified; use at your own risk.
Name:I 15 over INT MAIN ST
Structure number:I00015313+02481
Purpose:Carries highway overpass over highway
Route classification:Principal Arterial - Interstate (Rural) [01]
Length of largest span:75.1 ft. [22.9 m]
Total length:76.1 ft. [23.2 m]
Roadway width between curbs:41.3 ft. [12.6 m]
Deck width edge-to-edge:44.0 ft. [13.4 m]
Vertical clearance below bridge:16.4 ft. [5.0 m]
Owner:State Highway Agency [01]
Year built:1976
Historic significance:Bridge is not eligible for the National Register of Historic Places [5]
Design load:MS 18 / HS 20 [5]
Main span material:Prestressed concrete [5]
Main span 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: May 2017

Good/Fair/Poor Condition:Fair
Status:Open, no restriction [A]
Average daily traffic:1,985 [as of 2016]
Truck traffic:20% of total traffic
Deck condition:Very Good [8 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:Superior to present desirable criteria [9]
Roadway alignment appraisal:Equal to present desirable criteria [8]
Scour condition:Bridge not over waterway. [N]
Sufficiency rating:98.0

Previous Inspections

DateConditionDeckSuperstructureSubstructureADTSuff. Rating
May 2017FairVery GoodGoodSatisfactory198598.0
May 2013FairSatisfactoryGoodSatisfactory339098.0
June 2009FairGoodGoodSatisfactory367098.0
June 2005GoodGoodGoodGood363096.0
August 2001GoodVery GoodVery GoodGood245096.0
October 1996GoodVery GoodVery GoodGood321096.0
September 1992GoodVery GoodVery GoodGood265096.0
January 1991GoodVery GoodVery GoodGood276096.0

Element Data

Source: National Bridge Elements dataset, 2018 edition. This feature is experimental.
Prestressed Concrete Girder/Beamlinear ft.531526500
Reinforced Concrete Decksq. ft.3,3583,357100
Concrete Protective Coatingsq. ft.3,3581,125002,233
Reinforced Concrete Abutmentlinear ft.194194000
Bridge Rail
Steel or Aluminum Bridge Raillinear ft.262026200
Steel Protective Coatingsq. ft.4372194444130