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I 15 over SILVERBOW CREEK-RR

Map

Coordinates:
+45.99640, -112.56339
45°59'47" N, 112°33'48" W

Facts

Source: National Bridge Inventory. Information not verified; use at your own risk.
Name:I 15 over SILVERBOW CREEK-RR
Structure number:I00015125+00842
Location:1.2M W BUTTE
Purpose:Carries highway over railroad and waterway
Route classification:Principal Arterial - Interstate (Rural) [01]
Length of largest span:104.0 ft. [31.7 m]
Total length:488.9 ft. [149.0 m]
Roadway width between curbs:27.9 ft. [8.5 m]
Deck width edge-to-edge:31.8 ft. [9.7 m]
Vertical clearance below bridge:23.0 ft. [7.0 m]
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]
Main span material:Steel [3]
Main span design:Stringer/Multi-beam or girder [02]
Deck type:Concrete Cast-in-Place [1]
Wearing surface:Bituminous [6]

Latest Available Inspection: October 2018

Good/Fair/Poor Condition:Fair
Status:Open, no restriction [A]
Average daily traffic:6,734 [as of 2017]
Truck traffic:15% of total traffic
Deck condition:Satisfactory [6 out of 9]
Superstructure condition:Satisfactory [6 out of 9]
Substructure condition:Satisfactory [6 out of 9]
Structural appraisal:Equal to present minimum criteria [6]
Deck geometry appraisal:Basically intolerable requiring high priority of corrrective action [3]
Underclearances appraisal:Somewhat better than minimum adequacy to tolerate being left in place as is [5]
Water adequacy appraisal:Equal to present desirable criteria [8]
Roadway alignment appraisal:Better than present minimum criteria [7]
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 assessed or calculated scour condition. [5]
Sufficiency rating:75.6
Recommended work:Replacement of bridge or other structure because of substandard load carrying capacity or substantial bridge roadway geometry. [31]
Estimated cost of work:$1,382,000

Previous Inspections

DateConditionDeckSuperstructureSubstructureADTSuff. Rating
October 2018FairSatisfactorySatisfactorySatisfactory673475.6
October 2016FairSatisfactorySatisfactorySatisfactory679575.6
October 2014FairSatisfactoryGoodGood1192077.3
October 2012FairSatisfactoryGoodGood1192077.3
October 2010GoodGoodGoodGood1192077.3
November 2008GoodGoodGoodGood1141077.3
December 2006GoodGoodGoodGood1253077.2
August 2004FairSatisfactoryGoodGood1355077.2
March 2002FairSatisfactoryGoodGood1280077.2
June 1999FairSatisfactoryGoodGood1296077.2
April 1997FairSatisfactoryGoodGood1020077.4
May 1995FairSatisfactoryGoodGood1020077.0
June 1993FairSatisfactoryGoodGood822077.2
November 1990FairFairSatisfactorySatisfactory763076.2

Element Data

Source: National Bridge Elements dataset, 2019 edition. This feature is experimental.
ElementUnitsQuantity1-Good2-Fair3-Poor4-Serious
Superstructure
Steel Girder/Beamlinear ft.417149170980
Steel Protective Coatingsq. ft.6,4335,082322643386
Prestressed Concrete Girder/Beamlinear ft.1,9191,8427700
Deck
Reinforced Concrete Decksq. ft.15,48915,11337600
Wearing Surfacessq. ft.15,48915,21302760
Substructure
Reinforced Concrete Columneach98010
Reinforced Concrete Abutmentlinear ft.82503200
Reinforced Concrete Pier Caplinear ft.1971682900
Joints
Pourable Jointlinear ft.21904555119
Bearings
Movable Bearingeach3803800
Steel Protective Coatingsq. ft.38002810
Fixed Bearingeach3803800
Steel Protective Coatingsq. ft.381601210
Bridge Rail
Reinforced Concrete Bridge Raillinear ft.97865232600