S 308 over ROCK CREEK


+45.17394, -109.24998
45°10'26" N, 109°14'60" W


Source: National Bridge Inventory. Information not verified; use at your own risk.
Name:S 308 over ROCK CREEK
Structure number:S00308000+01001
Location:RED LODGE
Purpose:Carries highway over waterway
Route classification:Major Collector (Rural) [07]
Length of largest span:72.2 ft. [22.0 m]
Total length:72.2 ft. [22.0 m]
Roadway width between curbs:39.4 ft. [12.0 m]
Deck width edge-to-edge:47.2 ft. [14.4 m]
Skew angle:15°
Owner:State Highway Agency [01]
Year built:2003
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:Tee beam [04]
Deck type:Concrete Cast-in-Place [1]
Wearing surface:Monolithic Concrete (concurrently placed with structural deck) [1]

Latest Available Inspection: November 2015

Good/Fair/Poor Condition:Good
Status:Open, no restriction [A]
Average daily traffic:1,340 [as of 2009]
Truck traffic:2% of total traffic
Deck condition:Good [7 out of 9]
Superstructure condition:Good [7 out of 9]
Substructure condition:Good [7 out of 9]
Structural appraisal:Better than present minimum criteria [7]
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:There are no noticeable or noteworthy deficiencies which affect the condition of the channel. [9]
Scour condition:Bridge foundations determined to be stable for the assessed or calculated scour condition. [8]
Sufficiency rating:99.9

Previous Inspections

DateConditionDeckSuperstructureSubstructureADTSuff. Rating
November 2015GoodGoodGoodGood134099.9
November 2011GoodGoodGoodGood134099.9
November 2007GoodGoodGoodGood107099.9
December 2005GoodVery GoodVery GoodVery Good130099.9
December 2003GoodGoodGoodGood159091.3
April 2002PoorFairFairPoor159037.6
April 2000PoorSatisfactoryFairPoor111038.8
July 1998PoorGoodFairPoor122038.7
February 1996PoorGoodFairPoor101038.8
December 1993PoorGoodFairPoor83038.8
March 1992PoorGoodFairPoor93039.3
December 1989FairGoodFairFair89052.4

Element Data

Source: National Bridge Elements dataset, 2019 edition. This feature is experimental.
Prestressed Concrete Girder/Beamlinear ft.505505000
Reinforced Concrete Decksq. ft.3,4123,412000
Reinforced Concrete Abutmentlinear ft.187178900
Fixed Bearingeach1414000
Steel Protective Coatingsq. ft.999999000
Bridge Rail
Steel or Aluminum Bridge Raillinear ft.144144000