Structure S080 12600 · Keith County, NE

I80 over South Platte River Trib

Carries I80 over South Platte River Trib, 1w Ogallala Interchg.

Overall conditionGood

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

How ratings work
Culvertsets the rating8/9 · Very Good
Channelnot part of overall8/9 · Very Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT26 FT ACROSS25 FT0ELEVATION · LENGTHS TO SCALE
Culvert 8/9

A culvert 26 ft across with 3 openings. Lengths and the car 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, so those are drawn as typical for a culvert.

Built1968rebuilt 1988
Length25.9 ft7.9 m
Daily traffic15,280counted 2018
Last inspectedOctober 2023every 24 months

Location

StateNebraska
CountyKeith
Location1w Ogallala Interchg
CarriesI80
CrossesSouth Platte River Trib
Coordinates41.11500, -101.72830

Physical Characteristics

MaterialConcrete
DesignCulvert
Total Length25.9 ft (7.9 m)
Max Span7.9 ft (2.4 m)
Deck Area178.5 sq m
Main Spans3
Year Built1968 (reconstructed 1988)

Traffic

Avg Daily Traffic15,280 (2018)
Truck Traffic45%
Lanes On Bridge4

Inspection & Ownership

Last InspectionOctober 2023
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical8 — Stable, low risk
Structure NumberS080 12600

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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