8th Street over Big Sioux River


+43.54863, -96.72527
43°32'55" N, 96°43'31" W


Source: National Bridge Inventory. Information not verified; use at your own risk.
Name:8th Street over Big Sioux River
Structure number:000000050203206
Location:E of Phillips Avenue - SF
Purpose:Carries highway over waterway
Route classification:Collector (Urban) [17]
Length of largest span:85.3 ft. [26.0 m]
Total length:241.2 ft. [73.5 m]
Roadway width between curbs:51.8 ft. [15.8 m]
Deck width edge-to-edge:72.5 ft. [22.1 m]
Owner:City or Municipal Highway Agency [04]
Year built:1912
Historic significance:Bridge is on the National Register of Historic Places [1]
Number of main spans:3
Main spans material:Concrete [1]
Main spans design:Arch - Deck [11]
Deck type:Not applicable [N]

Latest Available Inspection: September 2017

Good/Fair/Poor Condition:Poor
Status:Open, no restriction [A]
Average daily traffic:10,163 [as of 2015]
Truck traffic:1% of total traffic
Deck condition:Poor [4 out of 9]
Superstructure condition:Serious [3 out of 9]
Substructure condition:Serious [3 out of 9]
Structural appraisal:Basically intolerable requiring high priority of corrrective action [3]
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:Banks are protected or well vegetated. River control devices such as spur dikes and embankment protection are not required or are in a stable condition. [8]
Pier/abutment protection:Navigation protection not required [1]
Scour condition:Bridge with "unknown" foundation that has not been evaluated for scour. [U]
Sufficiency rating:34.0
Recommended work:Replacement of bridge or other structure because of substandard load carrying capacity or substantial bridge roadway geometry. [31]
Estimated cost of work:$5,100,000

Previous Inspections

DateConditionDeckSuperstructureSubstructureADTSuff. Rating
September 2017PoorPoorSeriousSerious1016334.0
September 2015PoorPoorPoorSerious1016346.3
September 2013PoorPoorSatisfactorySerious1016345.8
October 2011PoorPoorSatisfactorySerious1016345.8
October 2009PoorPoorSatisfactorySerious1016345.8
May 2007PoorPoorSatisfactoryPoor1016359.8
July 2005PoorPoorSatisfactoryPoor1016359.8
September 2003PoorSatisfactorySatisfactorySerious1016348.8
August 2001PoorSatisfactorySatisfactorySerious1016348.8
August 1999FairSatisfactorySatisfactory-1016389.8
May 1997PoorFairPoorFair1016361.8
May 1995PoorFairPoorFair1016361.5
May 1993PoorFairPoorFair1016361.5
April 1991PoorFairPoorFair1016361.5