421st Avenue over Creek


+45.57082, -97.79553
45°34'15" N, 97°47'44" W


Source: National Bridge Inventory. Information not verified; use at your own risk.
Name:421st Avenue over Creek
Structure number:000000019090012
Location:4.8N & 2E of Pierpont
Purpose:Carries highway over waterway
Route classification:Local (Rural) [09]
Length of largest span:44.9 ft. [13.7 m]
Total length:44.9 ft. [13.7 m]
Roadway width between curbs:17.4 ft. [5.3 m]
Deck width edge-to-edge:19.0 ft. [5.8 m]
Owner:County Highway Agency [02]
Year built:1935
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:Corrugated Steel [6]
Wearing surface:Gravel [8]

Latest Available Inspection: May 2018

Good/Fair/Poor Condition:Poor
Status:Posted for load [P]
Average daily traffic:10 [as of 2016]
Truck traffic:2% of total traffic
Deck condition:Satisfactory [6 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 corrrective action [3]
Water adequacy appraisal:Somewhat better than minimum adequacy to tolerate being left in place as is [5]
Roadway alignment appraisal:Meets minimum tolerable limits to be left in place as is [4]
Channel protection:Bank is beginning to slump. River control devices and embankment protection have widespread minor damage. There is minor stream bed movement evident. Debris is restricting the channel slightly. [6]
Pier/abutment protection:Navigation protection not required [1]
Scour condition:Bridge with "unknown" foundation that has not been evaluated for scour. [U]
Sufficiency rating:29.0
Recommended work:Replacement of bridge or other structure because of substandard load carrying capacity or substantial bridge roadway geometry. [31]
Estimated cost of work:$605,000

Previous Inspections

DateConditionDeckSuperstructureSubstructureADTSuff. Rating
May 2018PoorSatisfactoryFairPoor1029.0
May 2016PoorSatisfactoryFairPoor1029.0
June 2014PoorSatisfactoryFairPoor1029.0
July 2012PoorSatisfactoryFairPoor1029.0
August 2010PoorSatisfactoryFairPoor1029.0
July 2008PoorSatisfactoryFairPoor1029.0
August 2006PoorSatisfactoryFairPoor1029.0
June 2004PoorSatisfactoryFairPoor1029.0
June 2002PoorSatisfactoryFairPoor1029.0
June 2000FairSatisfactoryFairFair1036.0
July 1998PoorSatisfactoryFairPoor1029.0
July 1996FairGoodFairSatisfactory1035.2
June 1994FairGoodFairSatisfactory1021.4
June 1992FairGoodFairSatisfactory1021.4
May 1990FairVery GoodSatisfactoryGood1033.1