County Road 9 over Cheyenne River


+43.42052, -104.13170
43°25'14" N, 104°07'54" W


Source: National Bridge Inventory. Information not verified; use at your own risk.
Name:County Road 9 over Cheyenne River
Structure number:DSD
Location:6 Mi. N.E.Of Mule Crk Jct
Purpose:Carries highway over waterway
Route classification:Local (Rural) [09]
Length of largest span:130.9 ft. [39.9 m]
Total length:132.9 ft. [40.5 m]
Roadway width between curbs:16.4 ft. [5.0 m]
Deck width edge-to-edge:17.7 ft. [5.4 m]
Vertical clearance above deck:12.5 ft. [3.8 m]
Owner:County Highway Agency [02]
Year built:1920
Year reconstructed:1960
Historic significance:Bridge is eligible for the National Register of Historic Places [2]
Main span material:Steel [3]
Main span design:Truss - Thru [10]
Deck type:Concrete Cast-in-Place [1]
Wearing surface:Gravel [8]

Latest Available Inspection: April 2018

Good/Fair/Poor Condition:Poor
Status:Open, no restriction [A]
Average daily traffic:24 [as of 2017]
Truck traffic:17% of total traffic
Deck condition:Serious [3 out of 9]
Superstructure condition:Fair [5 out of 9]
Substructure condition:Poor [4 out of 9]
Structural appraisal:Meets minimum tolerable limits to be left in place as is [4]
Deck geometry appraisal:Basically intolerable requiring high priority of replacement [2]
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:42.5
Recommended work:Replacement of bridge or other structure because of substandard load carrying capacity or substantial bridge roadway geometry. [31]
Estimated cost of work:$701,000

Previous Inspections

DateConditionDeckSuperstructureSubstructureADTSuff. Rating
April 2018PoorSeriousFairPoor2442.5
April 2016PoorSeriousFairPoor2342.5
April 2014PoorCriticalPoorFair1043.3
April 2012PoorCriticalPoorFair1043.3
March 2010PoorCriticalPoorFair1042.9
April 2008PoorCriticalPoorFair1042.9
March 2006PoorCriticalPoorFair542.9
April 2004Poor-PoorFair542.9
April 2002PoorCriticalPoorFair542.9
April 2000PoorImminent FailurePoorFair542.9
April 1998PoorImminent FailurePoorFair542.9
May 1996PoorImminent FailurePoorFair542.9
April 1994PoorPoorGoodGood565.8
May 1992PoorPoorGoodGood565.8
July 1990FairSatisfactoryGoodGood568.8