+45.83479, -109.93581
45°50'05" N, 109°56'09" W


Source: National Bridge Inventory. Information not verified; use at your own risk.
Name:S 91 over BOULDER RIVER
Structure number:P00091002+06221
Purpose:Carries highway over waterway
Route classification:Minor Arterial (Rural) [06]
Length of largest span:89.9 ft. [27.4 m]
Total length:285.8 ft. [87.1 m]
Roadway width between curbs:25.9 ft. [7.9 m]
Deck width edge-to-edge:32.5 ft. [9.9 m]
Owner:State Highway Agency [01]
Year built:1938
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:Steel continuous [4]
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: September 2017

Good/Fair/Poor Condition:Fair
Status:Open, no restriction [A]
Average daily traffic:2,077 [as of 2016]
Truck traffic:5% of total traffic
Deck condition:Fair [5 out of 9]
Superstructure condition:Satisfactory [6 out of 9]
Substructure condition:Fair [5 out of 9]
Structural appraisal:Somewhat better than minimum adequacy to tolerate being left in place as is [5]
Deck geometry appraisal:Basically intolerable requiring high priority of corrrective action [3]
Water adequacy appraisal:Superior to present desirable criteria [9]
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:51.9
Recommended work:Bridge rehabilitation because of general structure deterioration or inadequate strength. [35]
Estimated cost of work:$608,000

Previous Inspections

DateConditionDeckSuperstructureSubstructureADTSuff. Rating
September 2017FairFairSatisfactoryFair207751.9
September 2015PoorPoorSatisfactoryFair169053.3
September 2013FairFairSatisfactoryFair169055.4
September 2011FairFairGoodSatisfactory169065.7
September 2009FairSatisfactoryGoodSatisfactory163066.8
September 2007FairSatisfactoryGoodSatisfactory209064.4
October 2005FairSatisfactoryGoodFair207054.0
March 2004FairSatisfactoryGoodFair216053.9
April 2002FairSatisfactoryGoodFair182056.3
April 2000FairSatisfactoryGoodFair170056.4
December 1997FairSatisfactoryGoodFair164056.5
April 1996FairSatisfactoryGoodFair143055.7
May 1994FairSatisfactoryGoodFair157653.3
April 1992FairSatisfactoryGoodSatisfactory190667.8
September 1989FairFairVery GoodGood176466.9

Element Data

Source: National Bridge Elements dataset, 2019 edition. This feature is experimental.
Steel Girder/Beamlinear ft.1,0019515000
Steel Protective Coatingsq. ft.14,0149,8102,80301,401
Reinforced Concrete Decksq. ft.33,777019,01414,7630
Reinforced Concrete Pier Walllinear ft.5905900
Reinforced Concrete Abutmentlinear ft.141141000
Reinforced Concrete Pier Caplinear ft.623812120
Strip Seal Jointlinear ft.72541800
Open Jointlinear ft.5252000
Movable Bearingeach129210
Steel Protective Coatingsq. ft.129210
Fixed Bearingeach40400
Steel Protective Coatingsq. ft.40400
Bridge Rail
Steel or Aluminum Bridge Raillinear ft.571571000
Steel Protective Coatingsq. ft.1,4281,428000
Reinforced Concrete Bridge Raillinear ft.9328854340