Structure S080 21180 · Dawson County, NE

N47 over I80

Carries N47 over I80, Gothenburg Intrchg.

Overall conditionGood

Set by its lowest-rated component: Deck at 8 of 9.

How ratings work
Decksets the rating8/9 · Very Good
Superstructure9/9 · Excellent
Substructure9/9 · Excellent
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT274 FT OVERALL50 FT0ELEVATION · LENGTHS TO SCALE
Deck 8/9 · sets the ratingSuperstructure 9/9Substructure 9/9

274 ft end to end, longest span 136 ft: about 4 semi-trucks nose to tail. Lengths and the semi-truck on the deck are drawn to the same scale. Each part is colored by its latest inspection rating. The inventory records lengths but not heights or the layout of the shorter spans, so those are drawn as typical for a multi-beam bridge.

Built201412 years old
Length274.0 ft83.5 m
Daily traffic3,490counted 2018
Last inspectedOctober 2023every 24 months

Location

StateNebraska
CountyDawson
LocationGothenburg Intrchg
CarriesN47
CrossesI80
Coordinates40.91430, -100.16690

Physical Characteristics

MaterialSteel Continuous
DesignStringer/Multi-beam
Total Length274.0 ft (83.5 m)
Max Span136.2 ft (41.5 m)
Deck Width44.0 ft (13.4 m)
Deck Area1118.9 sq m
Main Spans2
Year Built2014

Traffic

Avg Daily Traffic3,490 (2018)
Truck Traffic8%
Lanes On Bridge2
Lanes Under Bridge4

Inspection & Ownership

Last InspectionOctober 2023
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour CriticalNot applicable
Structure NumberS080 21180

How Bridge Ratings Work

Inspectors rate each major part of a bridge (the deck you drive on, the superstructure of beams that holds it up, and the substructure of piers and abutments beneath) on a 0–9 scale. A bridge's overall condition is its lowest of those ratings, so one deteriorated component makes the whole bridge "poor."

0Failed
1Imminent failure
2Critical
3Serious
4Poor
5Fair
6Satisfactory
7Good
8Very good
9Excellent
Good · lowest component 7–9
Fair · lowest component 5–6
Poor · lowest component 0–4

A poor rating is not a closure. It means the bridge is flagged for priority repair or replacement; bridges judged unsafe are closed or posted with weight limits. The waterway (channel) rating is reported, but it does not count toward the overall classification.

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