Structure C007913920 · Scotts Bluff County, NE

County Road 20 over Tri-state Canal

Carries County Road 20 over Tri-state Canal, 5.5e Of Mitchell.

Overall conditionGood

Set by its lowest-rated component: Deck and Substructure at 7 of 9.

How ratings work
Decksets the rating7/9 · Good
Superstructure8/9 · Very Good
Substructuresets the rating7/9 · Good
Channelnot part of overall8/9 · Very Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT86 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9 · sets the ratingSuperstructure 8/9Substructure 7/9 · sets the rating

86 ft end to end, longest span 36 ft. 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 or the layout of the shorter spans, so those are drawn as typical for a channel-beam bridge.

Built197749 years old
Length86.0 ft26.2 m
Daily traffic50counted 2003
Last inspectedNovember 2023every 24 months

Location

StateNebraska
CountyScotts Bluff
Location5.5e Of Mitchell
CarriesCounty Road 20
CrossesTri-state Canal
Coordinates41.93330, -103.69670

Physical Characteristics

MaterialConcrete
DesignChannel Beam
Total Length86.0 ft (26.2 m)
Max Span36.1 ft (11 m)
Deck Width29.9 ft (9.1 m)
Deck Area238.4 sq m
Main Spans3
Year Built1977

Traffic

Avg Daily Traffic50 (2003)
Lanes On Bridge2

Inspection & Ownership

Last InspectionNovember 2023
Inspection FrequencyEvery 24 months
OwnerCounty Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical5 — Stable for scour
Structure NumberC007913920

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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