Share:

M16 370TH ST over NISHNABOTNA RIVER

Map

Coordinates:
+41.08867, -95.48040
41°05'19" N, 95°28'49" W

Facts

Source: National Bridge Inventory. Information not verified; use at your own risk.
Name:M16 370TH ST over NISHNABOTNA RIVER
Structure number:000000000246630
Location:073402904
Purpose:Carries highway over waterway
Route classification:Major Collector (Rural) [07]
Length of largest span:100.1 ft. [30.5 m]
Total length:291.0 ft. [88.7 m]
Roadway width between curbs:19.7 ft. [6.0 m]
Deck width edge-to-edge:21.3 ft. [6.5 m]
Skew angle:60°
Owner:County Highway Agency [02]
Year built:1940
Historic significance:Bridge is on the National Register of Historic Places [1]
Design load:MS 18 / HS 20 [5]
Number of main spans:2
Main spans material:Steel [3]
Main spans design:Truss - Thru [10]
Deck type:Concrete Cast-in-Place [1]
Wearing surface:Monolithic Concrete (concurrently placed with structural deck) [1]

Latest Available Inspection: March 2017

Good/Fair/Poor Condition:Poor
Status:Posted for load [P]
Average daily traffic:210 [as of 2016]
Truck traffic:14% of total traffic
Deck condition:Serious [3 out of 9]
Superstructure condition:Serious [3 out of 9]
Substructure condition:Critical [2 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:Equal to present minimum criteria [6]
Roadway alignment appraisal:Equal to present desirable criteria [8]
Channel protection:Bank protection has failed. River control devices have been destroyed. Stream bed aggradation, degradation or lateral movement has changed the channel to now threaten the bridge and/or approach roadway. [3]
Scour condition:Bridge is scour critical; bridge foundations determined to be unstable. [3]
Sufficiency rating:26.1
Recommended work:Replacement of bridge or other structure because of substandard load carrying capacity or substantial bridge roadway geometry. [31]

Previous Inspections

DateConditionDeckSuperstructureSubstructureADTSuff. Rating
March 2017PoorSeriousSeriousCritical21026.1
March 2015PoorSeriousSeriousCritical18026.2
March 2013PoorSeriousSeriousCritical18026.2
March 2011PoorPoorSeriousSerious15028.5
April 2009PoorPoorSeriousSerious15028.5
March 2007PoorPoorSeriousPoor21028.2
February 2005PoorPoorSeriousPoor21028.2
January 2003PoorPoorSeriousPoor24030.2
July 2001PoorPoorFairPoor24039.5
July 1999PoorPoorFairFair18046.8
June 1997PoorPoorFairFair18046.8
May 1995PoorPoorFairFair24046.7
April 1993PoorPoorFairFair24046.7
March 1991PoorPoorFairFair15046.8