+47.93178, -110.50692
47°55'54" N, 110°30'25" W


Source: National Bridge Inventory. Information not verified; use at your own risk.
Name:US 87 over MARIAS RIVER
Structure number:P00010051+06521
Purpose:Carries highway over waterway
Route classification:Principal Arterial - Other (Rural) [02]
Length of largest span:100.1 ft. [30.5 m]
Total length:273.0 ft. [83.2 m]
Roadway width between curbs:39.4 ft. [12.0 m]
Deck width edge-to-edge:42.3 ft. [12.9 m]
Skew angle:
Owner:State Highway Agency [01]
Year built:1988
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: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: October 2015

Good/Fair/Poor Condition:Fair
Status:Open, no restriction [A]
Average daily traffic:1,440 [as of 2009]
Truck traffic:2% of total traffic
Deck condition:Good [7 out of 9]
Superstructure condition:Very Good [8 out of 9]
Substructure condition:Satisfactory [6 out of 9]
Structural appraisal:Equal to present minimum criteria [6]
Deck geometry appraisal:Equal to present minimum criteria [6]
Water adequacy appraisal:Equal to present desirable criteria [8]
Roadway alignment appraisal:Equal to present desirable criteria [8]
Channel protection:Bank protection is in need of minor repairs. River control devices and embankment protection have a little minor damage. Banks and/or channel have minor amounts of drift. [7]
Scour condition:Bridge foundations determined to be stable for assessed or calculated scour condition. [5]
Sufficiency rating:81.5

Previous Inspections

DateConditionDeckSuperstructureSubstructureADTSuff. Rating
October 2015FairGoodVery GoodSatisfactory144081.5
October 2011FairGoodVery GoodSatisfactory144081.6
October 2007GoodGoodVery GoodGood182080.0
October 2005GoodVery GoodVery GoodGood180079.0
November 2003GoodVery GoodVery GoodVery Good170079.0
December 2001GoodVery GoodVery GoodVery Good170080.0
December 1999GoodVery GoodVery GoodVery Good166080.0
June 1998GoodVery GoodVery GoodVery Good197080.0
April 1996GoodVery GoodVery GoodVery Good164780.0
February 1994GoodVery GoodVery GoodVery Good136782.9
January 1992GoodVery GoodVery GoodVery Good130983.3

Element Data

Source: National Bridge Elements dataset, 2019 edition. This feature is experimental.
Prestressed Concrete Girder/Beamlinear ft.1,4961,496000
Reinforced Concrete Decksq. ft.11,56011,560000
Concrete Protective Coatingsq. ft.11,56011,560000
Reinforced Concrete Pier Walllinear ft.8585000
Reinforced Concrete Abutmentlinear ft.112100660
Reinforced Concrete Pier Caplinear ft.8585000
Fixed Bearingeach2220200
Steel Protective Coatingsq. ft.999999000
Bridge Rail
Reinforced Concrete Bridge Raillinear ft.5455182700