US 310 over ROCK CREEK


+45.51785, -108.86258
45°31'04" N, 108°51'45" W


Source: National Bridge Inventory. Information not verified; use at your own risk.
Name:US 310 over ROCK CREEK
Structure number:P00004042+04541
Purpose:Carries highway over waterway
Route classification:Principal Arterial - Other (Rural) [02]
Length of largest span:44.9 ft. [13.7 m]
Total length:137.1 ft. [41.8 m]
Roadway width between curbs:39.0 ft. [11.9 m]
Deck width edge-to-edge:42.3 ft. [12.9 m]
Owner:State Highway Agency [01]
Year built:1934
Year reconstructed:1968
Historic significance:Bridge is not eligible for the National Register of Historic Places [5]
Design load:M 13.5 / H 15 [2]
Number of main spans:3
Main spans material:Concrete [1]
Main spans design:Tee beam [04]
Deck type:Not applicable [N]
Wearing surface:Bituminous [6]

Latest Available Inspection: October 2018

Good/Fair/Poor Condition:Fair
Status:Open, no restriction [A]
Average daily traffic:4,323 [as of 2017]
Truck traffic:8% of total traffic
Deck condition:Good [7 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: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: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 is scour critical; bridge foundations determined to be unstable. [3]
Sufficiency rating:88.9

Previous Inspections

DateConditionDeckSuperstructureSubstructureADTSuff. Rating
October 2018FairGoodSatisfactorySatisfactory432388.9
October 2016FairGoodSatisfactorySatisfactory442057.7
October 2014FairGoodSatisfactorySatisfactory403057.7
October 2012FairGoodSatisfactorySatisfactory403057.7
October 2010FairGoodSatisfactorySatisfactory403057.7
October 2008FairGoodSatisfactoryGood395057.7
October 2006FairGoodSatisfactoryGood442057.7
November 2004GoodGoodGoodGood390057.7
December 2002GoodGoodGoodGood333054.7
April 2001GoodVery GoodGoodGood333054.7
January 1999GoodVery GoodGoodGood303054.7
December 1996FairSatisfactoryGoodGood288654.7
March 1995GoodGoodGoodGood288657.5
December 1992GoodGoodGoodGood292264.6
February 1991GoodGoodGoodGood288964.6

Element Data

Source: National Bridge Elements dataset, 2019 edition. This feature is experimental.
Reinforced Concrete Girder/Beamlinear ft.95884311500
Reinforced Concrete Top Flangesq. ft.5,7915,61717400
Wearing Surfacessq. ft.5,7915,55923200
Reinforced Concrete Columneach80800
Reinforced Concrete Abutmentlinear ft.92385400
Reinforced Concrete Pier Caplinear ft.7975400
Movable Bearingeach70520
Steel Protective Coatingsq. ft.140536
Fixed Bearingeach2102100
Steel Protective Coatingsq. ft.2101506
Bridge Rail
Steel or Aluminum Bridge Raillinear ft.2762651100