US Bridges

N71 over Tri-State Canal

Good

Scotts Bluff County, Nebraska · 3N Scottsbluff · Structure no. S071 06544

Built
1946
79 years old, rebuilt 1986
Condition
Good
inspected May 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
135 ft
2 main spans
Daily traffic
2,000
2018 count
Owner
State
State Highway Agency

About this bridge

N71 over Tri-State Canal is a steel continuous stringer/multi-beam or girder carrying N71 over Tri-State Canal in Scotts Bluff County, Nebraska. It was built in 1946 and reconstructed in 1986, so it is 79 years old, older than the Nebraska average of 47.1 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 2,000 vehicles a day, roughly 10% of them trucks, projected to reach 3,000 by 2038. The structure is 135 ft (41.1 m) long and 42 ft wide. If it were closed, the detour would be 31.1 mi (50 km).

CarriesN71
CrossesTri-State Canal
Location3N Scottsbluff
RouteState Highway 71
Coordinates41.9174, -103.677
Functional classRural Minor Arterial

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionMay 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating55.1 US tons
Inventory rating33.1 US tons

Structure

MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length135 ft (41.1 m)
Longest span65 ft (19.8 m)
Deck width42 ft (12.9 m)
Roadway width40 ft (12.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,000 (2018)
Projected traffic3,000 by 2038
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed31.1 mi (50 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway 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 N71 over Tri-State Canal built?

It was built in 1946, making it 79 years old in 2025. It was reconstructed in 1986.

What condition is N71 over Tri-State Canal in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in May 2024.

How much traffic does N71 over Tri-State Canal carry?

About 2,000 vehicles per day (2018 count), of which roughly 10% are trucks.

How long is N71 over Tri-State Canal?

The structure is 135 ft (41.1 m) long with a longest span of 65 ft (19.8 m) and a deck 42 ft wide.

Who owns N71 over Tri-State Canal?

It is owned by the State Highway Agency.