Structure C004022720 · Hall County, NE

70th Road over Prairie Creek

Carries 70th Road over Prairie Creek, 1.8s 6.7e Cairo.

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 overall9/9 · Excellent
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT92 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 8/9 · sets the ratingSuperstructure 9/9Substructure 9/9

92 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 slab bridge.

Built198838 years old
Length91.9 ft28 m
Daily traffic30counted 2003
Last inspectedApril 2022every 48 months

Location

StateNebraska
CountyHall
Location1.8s 6.7e Cairo
Carries70th Road
CrossesPrairie Creek
Coordinates40.97180, -98.47460

Physical Characteristics

MaterialConcrete Continuous
DesignSlab
Total Length91.9 ft (28 m)
Max Span36.1 ft (11 m)
Deck Width30.2 ft (9.2 m)
Deck Area257.6 sq m
Main Spans3
Year Built1988

Traffic

Avg Daily Traffic30 (2003)
Lanes On Bridge2

Inspection & Ownership

Last InspectionApril 2022
Inspection FrequencyEvery 48 months
OwnerCounty Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical8 — Stable, low risk
Structure NumberC004022720

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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