IA 12 over RR,RVR, STS, & IA 376


+42.48994, -96.37975
42°29'24" N, 96°22'47" W


Source: National Bridge Inventory. Information not verified; use at your own risk.
Name:IA 12 over RR,RVR, STS, & IA 376
Structure number:000000000052830
Location:0.1 mi W of Jct. IA 376
Purpose:Carries highway and pedestrian walkway over highway, waterway, and railroad
Route classification:Other Principal Arterial (Urban) [14]
Length of largest span:127.0 ft. [38.7 m]
Total length:3972.3 ft. [1210.7 m]
Roadway width between curbs:56.1 ft. [17.1 m]
Deck width edge-to-edge:64.6 ft. [19.7 m]
Vertical clearance below bridge:13.1 ft. [4.0 m]
Owner:State Highway Agency [01]
Year built:1936
Year reconstructed:1967
Historic significance:Bridge is eligible for the National Register of Historic Places [2]
Design load:M 18 / H 20 [4]
Number of main spans:57
Main spans material:Steel continuous [4]
Main spans design:Girder and floorbeam system [03]
Deck type:Concrete Cast-in-Place [1]
Wearing surface:Low slump Concrete [4]

Latest Available Inspection: May 2017

Good/Fair/Poor Condition:Fair
Status:Posted for load [P]
Average daily traffic:19,600 [as of 2017]
Truck traffic:2% of total traffic
Deck condition:Fair [5 out of 9]
Superstructure condition:Fair [5 out of 9]
Substructure condition:Fair [5 out of 9]
Structural appraisal:Basically intolerable requiring high priority of replacement [2]
Deck geometry appraisal:Somewhat better than minimum adequacy to tolerate being left in place as is [5]
Underclearances 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:Better than present minimum criteria [7]
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]
Scour condition:Bridge foundations determined to be stable for the assessed or calculated scour condition. [8]
Sufficiency rating:38.0
Recommended work:Replacement of bridge or other structure because of substandard load carrying capacity or substantial bridge roadway geometry. [31]

Previous Inspections

DateConditionDeckSuperstructureSubstructureADTSuff. Rating
May 2017FairFairFairFair1960038.0
May 2015FairFairFairFair2230038.0
May 2013FairFairFairFair2230037.0
May 2011FairFairFairFair2270037.0
May 2009FairFairFairFair2240037.0
December 2007PoorPoorFairFair2640035.0
December 2005PoorPoorFairFair2690035.0
April 2004PoorPoorFairFair2660035.0
April 2002PoorPoorFairFair2630035.0
June 2001PoorPoorFairFair2630035.0
September 2000FairFairFairSatisfactory2650038.0
August 1998FairFairFairSatisfactory188000.0
October 1996PoorFairPoorSatisfactory2750036.0
August 1995PoorFairPoorSatisfactory2750036.0
September 1994PoorFairPoorSatisfactory2690036.0
July 1993PoorFairPoorSatisfactory2610036.0
April 1992FairFairFairSatisfactory2560036.0

Element Data

Source: National Bridge Elements dataset, 2019 edition. This feature is experimental.
Steel Girder/Beamlinear ft.28,97512,42015,0731,4820
Steel Protective Coatingsq. ft.328,15030,775110,398171,14115,836
Reinforced Concrete Decksq. ft.251,976220,00926,4455,5220
Wearing Surfacessq. ft.249,761224,82811,06613,8670
Steel Pin or Pin & Hangar Assemblyeach7005650
Reinforced Concrete Columneach1739121610
Reinforced Concrete Abutmentlinear ft.15410322290
Concrete Protective Coatingsq. ft.306306000
Reinforced Concrete Pier Caplinear ft.3,4262,6974173120
Concrete Protective Coatingsq. ft.1,8851,8250600
Strip Seal Jointlinear ft.2697119800
Compression Jointlinear ft.629629000
Assembly without Seal Jointlinear ft.392392000
Movable Bearingeach40142340190
Fixed Bearingeach89031580
Bridge Rail
Steel or Aluminum Bridge Raillinear ft.3,9793,979000
Steel Protective Coatingsq. ft.18,83918,839000
Reinforced Concrete Bridge Raillinear ft.3,9743,20576900