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FRONTAGE/OLD 20 over NIOBRARA RIVER

Map

Coordinates:
+42.83219, -100.52819
42°49'56" N, 100°31'41" W

Facts

Source: National Bridge Inventory. Information not verified; use at your own risk.
Name:FRONTAGE/OLD 20 over NIOBRARA RIVER
Structure number:S020 19981
Location:3SE VALENTINE
Purpose:Carries highway over waterway
Route classification:Local (Rural) [09]
Length of largest span:145.3 ft. [44.3 m]
Total length:293.0 ft. [89.3 m]
Roadway width between curbs:24.0 ft. [7.3 m]
Deck width edge-to-edge:25.3 ft. [7.7 m]
Owner:State Highway Agency [01]
Year built:1931
Year reconstructed:1997
Historic significance:Bridge is on the National Register of Historic Places [1]
Design load:M 13.5 / H 15 [2]
Number of main spans:3
Main spans material:Steel continuous [4]
Main spans design:Truss - Deck [09]
Deck type:Concrete Cast-in-Place [1]
Wearing surface:Low slump Concrete [4]

Latest Available Inspection: July 2018

Good/Fair/Poor Condition:Fair
Status:Open, no restriction [A]
Average daily traffic:25 [as of 1998]
Truck traffic:21% of total traffic
Deck condition:Good [7 out of 9]
Superstructure condition:Satisfactory [6 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:Equal to present minimum criteria [6]
Water adequacy appraisal:Equal to present desirable criteria [8]
Roadway alignment appraisal:Equal to present minimum criteria [6]
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]
Pier/abutment protection:Navigation protection not required [1]
Scour condition:Bridge foundations determined to be stable for assessed or calculated scour condition. [5]
Sufficiency rating:82.4
Recommended work:Widening of existing bridge with deck rehabilitation or replacement. [34]

Previous Inspections

DateConditionDeckSuperstructureSubstructureADTSuff. Rating
July 2018FairGoodSatisfactorySatisfactory2582.4
July 2016FairGoodSatisfactorySatisfactory2575.5
February 2015FairGoodSatisfactorySatisfactory2575.5
July 2014FairGoodSatisfactorySatisfactory2575.5
July 2012FairGoodSatisfactorySatisfactory2576.8
November 2011FairGoodSatisfactorySatisfactory2576.8
December 2009FairGoodSatisfactorySatisfactory2576.8
August 2007FairGoodSatisfactoryFair2566.8
March 2005FairExcellentSatisfactorySatisfactory2576.8
July 2003FairExcellentSatisfactorySatisfactory2576.8
March 2001FairExcellentSatisfactorySatisfactory2576.8
June 1999FairExcellentSatisfactorySatisfactory2576.8
July 1997PoorPoorSatisfactorySatisfactory188054.3
July 1995FairFairSatisfactorySatisfactory177052.4
August 1993FairFairSatisfactorySatisfactory165552.5
July 1991FairFairSatisfactorySatisfactory169577.6

Element Data

Source: National Bridge Elements dataset, 2019 edition. This feature is experimental.
ElementUnitsQuantity1-Good2-Fair3-Poor4-Serious
Superstructure
Steel Stringerlinear ft.1,7351,735000
Steel Protective Coatingsq. ft.6,2906,2306000
Deck
Reinforced Concrete Decksq. ft.7,3277,22710000
Wearing Surfacessq. ft.6,3746,07430000
Superstructure
Steel Trusslinear ft.5815190620
Steel Protective Coatingsq. ft.3,3022,3120660330
Steel Floor Beamlinear ft.683683000
Steel Protective Coatingsq. ft.4,7044,23447000
Steel Gusset Plateeach9696000
Substructure
Reinforced Concrete Columneach40040
Reinforced Concrete Pier Walllinear ft.3636000
Reinforced Concrete Abutmentlinear ft.88068200
Reinforced Concrete Pier Caplinear ft.3636000
Joints
Strip Seal Jointlinear ft.7878000
Bearings
Movable Bearingeach40040
Fixed Bearingeach44000
Bridge Rail
Steel or Aluminum Bridge Raillinear ft.586586000