40430 308th Street over Choteau Creek


+42.92346, -98.10643
42°55'24" N, 98°06'23" W


Source: National Bridge Inventory. Information not verified; use at your own risk.
Name:40430 308th Street over Choteau Creek
Structure number:000000005032170
Location:6S & 1.8W of Avon
Purpose:Carries highway over waterway
Route classification:Local (Rural) [09]
Length of largest span:109.9 ft. [33.5 m]
Total length:112.5 ft. [34.3 m]
Roadway width between curbs:14.1 ft. [4.3 m]
Deck width edge-to-edge:16.1 ft. [4.9 m]
Vertical clearance above deck:13.5 ft. [4.1 m]
Owner:County Highway Agency [02]
Year built:1912
Historic significance:Bridge is on the National Register of Historic Places [1]
Main span material:Steel [3]
Main span design:Truss - Thru [10]
Deck type:Wood or Timber [8]
Wearing surface:Wood or Timber [7]

Latest Available Inspection: June 2018

Good/Fair/Poor Condition:Poor
Status:Posted for load [P]
Average daily traffic:60 [as of 2016]
Truck traffic:2% of total traffic
Deck condition:Fair [5 out of 9]
Superstructure condition:Fair [5 out of 9]
Substructure condition:Poor [4 out of 9]
Structural appraisal:Basically intolerable requiring high priority of replacement [2]
Deck geometry appraisal:Basically intolerable requiring high priority of replacement [2]
Water adequacy appraisal:Equal to present minimum criteria [6]
Roadway alignment appraisal:Somewhat better than minimum adequacy to tolerate being left in place as is [5]
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 with "unknown" foundation that has not been evaluated for scour. [U]
Sufficiency rating:17.6
Recommended work:Replacement of bridge or other structure because of substandard load carrying capacity or substantial bridge roadway geometry. [31]
Estimated cost of work:$1,175,000

Previous Inspections

DateConditionDeckSuperstructureSubstructureADTSuff. Rating
June 2018PoorFairFairPoor6017.6
May 2017PoorFairFairPoor6017.6
July 2016PoorSatisfactoryFairPoor6017.6
June 2015PoorSatisfactoryFairPoor6017.6
July 2014PoorSatisfactoryFairPoor6017.6
July 2013PoorSatisfactoryFairPoor6017.6
September 2012PoorSatisfactoryFairPoor6017.6
September 2011PoorSatisfactoryFairPoor6017.6
October 2010PoorSatisfactoryFairPoor6017.6
October 2009PoorSatisfactoryFairPoor6017.6
October 2008PoorSatisfactoryFairPoor6017.6
September 2007PoorSatisfactoryFairPoor6017.6
August 2006PoorSatisfactoryFairPoor6017.6
July 2005PoorSatisfactoryFairPoor6017.6
July 2004PoorSatisfactoryFairPoor6017.6
October 2003PoorSatisfactoryPoorPoor6024.1
June 2001PoorSatisfactoryFairPoor6024.1
August 1999PoorSatisfactoryFairPoor6024.1
June 1997FairGoodSatisfactoryGood6038.3
May 1995FairGoodSatisfactoryGood6037.8
August 1993GoodGoodGoodGood6042.1
August 1991GoodVery GoodGoodGood6042.1