County Road 21 over Kirby Creek


+43.74377, -108.15548
43°44'38" N, 108°09'20" W


Source: National Bridge Inventory. Information not verified; use at your own risk.
Name:County Road 21 over Kirby Creek
Structure number:FLP
Location:9 Mi. Ne Of Thermopolis
Purpose:Carries highway over waterway
Route classification:Local (Rural) [09]
Length of largest span:37.1 ft. [11.3 m]
Total length:40.0 ft. [12.2 m]
Roadway width between curbs:25.9 ft. [7.9 m]
Deck width edge-to-edge:28.5 ft. [8.7 m]
Skew angle:15°
Owner:County Highway Agency [02]
Year built:1988
Historic significance:Bridge is not eligible for the National Register of Historic Places [5]
Design load:MS 18 / HS 20 [5]
Main span material:Steel [3]
Main span design:Stringer/Multi-beam or girder [02]
Deck type:Concrete Cast-in-Place [1]

Latest Available Inspection: February 2017

Good/Fair/Poor Condition:Fair
Status:Open, no restriction [A]
Average daily traffic:220 [as of 2013]
Truck traffic:14% of total traffic
Deck condition:Satisfactory [6 out of 9]
Superstructure condition:Good [7 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 minimum criteria [6]
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 the assessed or calculated scour condition. [8]
Sufficiency rating:94.1
Recommended work:Other structural work, including hydraulic replacements. [38]
Estimated cost of work:$7,000

Previous Inspections

DateConditionDeckSuperstructureSubstructureADTSuff. Rating
February 2017FairSatisfactoryGoodSatisfactory22094.1
February 2015FairSatisfactoryGoodSatisfactory22094.1
March 2013FairSatisfactoryGoodSatisfactory22094.1
February 2011FairSatisfactoryGoodSatisfactory22093.8
February 2009FairSatisfactoryGoodSatisfactory22093.8
February 2007FairSatisfactoryGoodSatisfactory15593.8
March 2005FairSatisfactoryGoodSatisfactory15593.8
February 2003FairSatisfactoryGoodSatisfactory15593.8
February 2001FairSatisfactoryExcellentGood15593.8
March 1999FairSatisfactoryExcellentGood15593.8
July 1997FairSatisfactoryExcellentGood15593.8
March 1995FairSatisfactoryExcellentGood15593.8
April 1993GoodGoodVery GoodGood15593.8
April 1991GoodGoodVery GoodGood15593.8