US Bridges

Stc 1840;WOLVERINE over Blackfoot Canal

Fair

Bingham County, Idaho · 1.5 S. 0.9 W. Firth · Structure no. 000000000022350

Built
1964
61 years old
Condition
Fair
inspected November 2023
Type
Tee Beam
Prestressed Concrete
Length
37 ft
1 main span
Daily traffic
530
2023 count
Owner
County
County Highway Agency

About this bridge

Stc 1840;WOLVERINE over Blackfoot Canal is a prestressed concrete tee beam carrying Stc 1840;WOLVERINE over Blackfoot Canal in Bingham County, Idaho. It was built in 1964, so it is 61 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 6 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 530 vehicles a day, roughly 13% of them trucks, projected to reach 795 by 2042. The structure is 37 ft (11.3 m) long and 28 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesStc 1840;WOLVERINE
CrossesBlackfoot Canal
Location1.5 S. 0.9 W. Firth
RouteCounty Highway 1840
CountyBingham County
StateIdaho
Coordinates43.28274, -112.20359
Functional classRural Major Collector

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.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionNovember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating38 US tons
Inventory rating23 US tons

Structure

Structure typeTee Beam
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadH 15
Structure length37 ft (11.3 m)
Longest span36 ft (11 m)
Deck width28 ft (8.5 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic530 (2023)
Projected traffic795 by 2042
Trucks13%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$488,000 (2019 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Stc 1840;WOLVERINE over Blackfoot Canal built?

It was built in 1964, making it 61 years old in 2025.

What condition is Stc 1840;WOLVERINE over Blackfoot 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 November 2023.

How much traffic does Stc 1840;WOLVERINE over Blackfoot Canal carry?

About 530 vehicles per day (2023 count), of which roughly 13% are trucks.

How long is Stc 1840;WOLVERINE over Blackfoot Canal?

The structure is 37 ft (11.3 m) long with a longest span of 36 ft (11 m) and a deck 28 ft wide.

Who owns Stc 1840;WOLVERINE over Blackfoot Canal?

It is owned by the County Highway Agency.