+42.10619, -93.57086
42°06'22" N, 93°34'15" W


Source: National Bridge Inventory. Information not verified; use at your own risk.
Name:170TH ST over SKUNK RIVER
Structure number:000000000315280
Purpose:Carries highway over waterway
Route classification:Local (Rural) [09]
Length of largest span:149.9 ft. [45.7 m]
Total length:151.9 ft. [46.3 m]
Roadway width between curbs:20.0 ft. [6.1 m]
Deck width edge-to-edge:21.3 ft. [6.5 m]
Vertical clearance above deck:11.8 ft. [3.6 m]
Owner:County Highway Agency [02]
Year built:1939
Historic significance:Bridge is possibly eligible for the National Register of Historic Places [3]
Main span material:Steel [3]
Main span design:Truss - Thru [10]
Deck type:Concrete Cast-in-Place [1]
Wearing surface:Monolithic Concrete (concurrently placed with structural deck) [1]

Latest Available Inspection: December 2018

Good/Fair/Poor Condition:Fair
Status:Posted for other load-capacity restriction [R]
Average daily traffic:120 [as of 2015]
Deck condition:Fair [5 out of 9]
Superstructure condition:Fair [5 out of 9]
Substructure condition:Satisfactory [6 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 replacement [2]
Water adequacy appraisal:Better than present minimum criteria [7]
Roadway alignment appraisal:Basically intolerable requiring high priority of replacement [2]
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:52.0
Recommended work:Replacement of bridge or other structure because of substandard load carrying capacity or substantial bridge roadway geometry. [31]

Previous Inspections

DateConditionDeckSuperstructureSubstructureADTSuff. Rating
December 2018FairFairFairSatisfactory12052.0
November 2016FairFairFairSatisfactory12052.0
January 2015FairSatisfactoryFairSatisfactory12053.0
December 2012FairSatisfactoryFairSatisfactory12053.0
December 2010FairSatisfactoryFairSatisfactory12056.8
January 2009FairSatisfactoryFairSatisfactory12052.8
January 2007FairGoodSatisfactorySatisfactory12064.1
November 2004FairGoodSatisfactorySatisfactory12064.1
December 2002FairGoodSatisfactorySatisfactory12064.1
February 2001FairGoodSatisfactorySatisfactory12063.8
January 1999FairGoodSatisfactorySatisfactory10073.8
October 1996FairGoodGoodSatisfactory10073.8
February 1995FairGoodGoodSatisfactory10073.8
October 1992FairGoodVery GoodSatisfactory10073.8
February 1991FairGoodVery GoodSatisfactory12063.8