US Bridges

470th Lane over Mirage Flats Canal

FairPosted for load

Sheridan County, Nebraska · 11.7 MI Sse of Haysprings · Structure no. NKA-MF-010

Built
1945
80 years old
Condition
Fair
inspected April 2024
Type
Slab
Concrete
Length
25 ft
1 main span
Daily traffic
5
2014 count
Owner
Federal
Bureau of Reclamation

About this bridge

470th Lane over Mirage Flats Canal is a concrete slab carrying 470th Lane over Mirage Flats Canal in Sheridan County, Nebraska. It was built in 1945, so it is 80 years old, older than the Nebraska average of 47.1 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 6 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. Its operating status is: posted for load restriction.

It carries about 5 vehicles a day, projected to reach 10 by 2046. The structure is 25 ft (7.7 m) long and 16 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

Location

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Carries470th Lane
CrossesMirage Flats Canal
Location11.7 MI Sse of Haysprings
CountySheridan County
StateNebraska
Coordinates42.51664, -102.73362
Functional classRural Local

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionApril 2024
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation3: Basically intolerable, requiring high priority of corrective action
Deck geometry6: Equal to present minimum criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating13.9 US tons
Inventory rating10.7 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadH 10
Structure length25 ft (7.7 m)
Longest span23 ft (7.1 m)
Deck width16 ft (4.9 m)
Roadway width14 ft (4.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5 (2014)
Projected traffic10 by 2046
Trucks—
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed0.6 mi (1 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerBureau of Reclamation
Maintained byOther Local Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was 470th Lane over Mirage Flats Canal built?

It was built in 1945, making it 80 years old in 2025.

What condition is 470th Lane over Mirage Flats Canal in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in April 2024.

How much traffic does 470th Lane over Mirage Flats Canal carry?

About 5 vehicles per day (2014 count).

How long is 470th Lane over Mirage Flats Canal?

The structure is 25 ft (7.7 m) long with a longest span of 23 ft (7.1 m) and a deck 16 ft wide.

Who owns 470th Lane over Mirage Flats Canal?

It is owned by the Bureau of Reclamation and maintained by the Other Local Agency.