US Bridges

US 26 Ebl & Wbl over Snake River;w.Blackfoot

Fair

Bingham County, Idaho · In Blackfoot · Structure no. 000000000013225

Built
1965
60 years old, rebuilt 1983
Condition
Fair
inspected August 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
467 ft
6 main spans
Daily traffic
18,000
2023 count
Owner
State
State Highway Agency

About this bridge

US 26 Ebl & Wbl over Snake River;w.Blackfoot is a prestressed concrete stringer/multi-beam or girder carrying US 26 Ebl & Wbl over Snake River;w.Blackfoot in Bingham County, Idaho. It was built in 1965 and reconstructed in 1983, so it is 60 years old, older than the Idaho average of 45.3 years.

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

It carries about 18,000 vehicles a day, roughly 10% of them trucks, projected to reach 27,000 by 2042. The structure is 467 ft (142.3 m) long and 77 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesUS 26 Ebl & Wbl
CrossesSnake River;w.Blackfoot
LocationIn Blackfoot
RouteU.S. Route 26
StateIdaho
Coordinates43.20017, -112.36681
Functional classUrban Other Principal Arterial

Condition and inspection

Fair

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

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection7 GoodSome minor problems.
Last inspectionAugust 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry9: Superior to present desirable criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating75.9 US tons
Inventory rating38 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans6
Design loadHS 20
Structure length467 ft (142.3 m)
Longest span78 ft (23.9 m)
Deck width77 ft (23.5 m)
Roadway width74 ft (22.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic18,000 (2023)
Projected traffic27,000 by 2042
Trucks10%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$10.5 million
NavigationNo navigation control on waterway

Frequently asked questions

When was US 26 Ebl & Wbl over Snake River;w.Blackfoot built?

It was built in 1965, making it 60 years old in 2025. It was reconstructed in 1983.

What condition is US 26 Ebl & Wbl over Snake River;w.Blackfoot 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 August 2024.

How much traffic does US 26 Ebl & Wbl over Snake River;w.Blackfoot carry?

About 18,000 vehicles per day (2023 count), of which roughly 10% are trucks.

How long is US 26 Ebl & Wbl over Snake River;w.Blackfoot?

The structure is 467 ft (142.3 m) long with a longest span of 78 ft (23.9 m) and a deck 77 ft wide.

Who owns US 26 Ebl & Wbl over Snake River;w.Blackfoot?

It is owned by the State Highway Agency.