Structure C002421015 · Dawson County, NE

County Road 770 over Field Drain

Carries County Road 770 over Field Drain, 1s 1.2w Of Eddyville.

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
Channelnot part of overall7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT81 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 8/9 · sets the ratingSuperstructure 9/9Substructure 9/9

81 ft end to end, longest span 27 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 tee-beam bridge.

Built198640 years old
Length81.0 ft24.7 m
Daily traffic25counted 2003
Last inspectedNovember 2023every 48 months

Location

StateNebraska
CountyDawson
Location1s 1.2w Of Eddyville
CarriesCounty Road 770
CrossesField Drain
Coordinates40.98830, -99.64670

Physical Characteristics

MaterialPrestressed Concrete
DesignTee Beam
Total Length81.0 ft (24.7 m)
Max Span26.9 ft (8.2 m)
Deck Width30.2 ft (9.2 m)
Deck Area227.2 sq m
Main Spans3
Year Built1986

Traffic

Avg Daily Traffic25 (2003)
Lanes On Bridge2

Inspection & Ownership

Last InspectionNovember 2023
Inspection FrequencyEvery 48 months
OwnerCounty Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical8 — Stable, low risk
Structure NumberC002421015

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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