US 18 over Niobrara River


+42.76696, -104.45239
42°46'01" N, 104°27'09" W


Source: National Bridge Inventory. Information not verified; use at your own risk.
Name:US 18 over Niobrara River
Structure number:FDE
Purpose:Carries highway and pedestrian walkway over waterway
Route classification:Principal Arterial - Other (Rural) [02]
Length of largest span:102.7 ft. [31.3 m]
Total length:108.9 ft. [33.2 m]
Roadway width between curbs:49.9 ft. [15.2 m]
Deck width edge-to-edge:65.0 ft. [19.8 m]
Skew angle:45°
Owner:State Highway Agency [01]
Year built:1988
Historic significance:Bridge is not eligible for the National Register of Historic Places [5]
Design load:MS 18 / HS 20 [5]
Main span material:Steel [3]
Main span design:Stringer/Multi-beam or girder [02]
Deck type:Concrete Cast-in-Place [1]
Wearing surface:Latex Concrete or similar additive [3]

Latest Available Inspection: March 2018

Good/Fair/Poor Condition:Fair
Status:Open, no restriction [A]
Average daily traffic:4,206 [as of 2017]
Truck traffic:14% of total traffic
Deck condition:Good [7 out of 9]
Superstructure condition:Good [7 out of 9]
Substructure condition:Satisfactory [6 out of 9]
Structural appraisal:Equal to present minimum criteria [6]
Deck geometry appraisal:Equal to present minimum criteria [6]
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]
Scour condition:Bridge foundations determined to be stable for the assessed or calculated scour condition. [8]
Sufficiency rating:90.7

Previous Inspections

DateConditionDeckSuperstructureSubstructureADTSuff. Rating
March 2018FairGoodGoodSatisfactory420690.7
March 2016GoodGoodGoodGood309592.6
March 2014GoodGoodGoodGood450590.2
January 2012GoodGoodGoodGood445290.3
March 2010GoodGoodGoodGood451980.0
March 2008GoodGoodGoodGood447080.0
February 2006GoodGoodGoodGood440080.0
February 2004GoodGoodGoodGood497080.0
March 2002GoodGoodGoodGood510080.0
March 2000GoodGoodExcellentGood415080.0
February 1998GoodGoodExcellentGood400080.0
January 1996FairSatisfactoryExcellentGood175080.0
February 1994GoodGoodGoodGood387080.0
March 1992GoodVery GoodVery GoodVery Good385080.0
April 1990GoodVery GoodVery GoodVery Good385080.0

Element Data

Source: National Bridge Elements dataset, 2019 edition. This feature is experimental.
Steel Girder/Beamlinear ft.700700000
Steel Protective Coatingsq. ft.9,8499,849000
Reinforced Concrete Decksq. ft.7,0856,68540000
Wearing Surfacessq. ft.5,4505,450000
Reinforced Concrete Abutmentlinear ft.1721601200
Compression Jointlinear ft.8808800
Elastomeric Bearingeach1401310
Bridge Rail
Reinforced Concrete Bridge Raillinear ft.2151952000