Structure NKA-MF-010 · Sheridan County, NE

470th Lane over Mirage Flats Canal

Carries 470th Lane over Mirage Flats Canal, 11.7 Mi Sse Of Haysprings.

Overall conditionFair

Set by its lowest-rated component: Superstructure at 6 of 9.

How ratings work
Deck7/9 · Good
Superstructuresets the rating6/9 · Satisfactory
Substructure7/9 · Good
Channelnot part of overall7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT25 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9Superstructure 6/9 · sets the ratingSubstructure 7/9

25 ft end to end. 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.

Built194581 years old
Length25.3 ft7.7 m
Daily traffic5counted 2014
Last inspectedApril 2024every 24 months

Location

StateNebraska
CountySheridan
Location11.7 Mi Sse Of Haysprings
Carries470th Lane
CrossesMirage Flats Canal
Coordinates42.51664, -102.73362

Physical Characteristics

MaterialConcrete
DesignSlab
Total Length25.3 ft (7.7 m)
Max Span23.3 ft (7.1 m)
Deck Width16.1 ft (4.9 m)
Deck Area37.7 sq m
Main Spans1
Year Built1945

Traffic

Avg Daily Traffic5 (2014)
Lanes On Bridge1

Inspection & Ownership

Last InspectionApril 2024
Inspection FrequencyEvery 24 months
OwnerBureau of Reclamation
Historical SignificanceBridge is not eligible for the National Register
Scour Critical5 — Stable for scour
Structure NumberNKA-MF-010

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.

Nearby Bridges