US Bridges

Township Road over Idaho Canal

Fair

Bonneville County, Idaho · 1.0 S. 1.5 E. Idaho Falls · Structure no. 000000000031315

Built
1972
53 years old
Condition
Fair
inspected April 2024
Type
Tee Beam
Prestressed Concrete
Length
38 ft
1 main span
Daily traffic
3,700
2023 count
Owner
County
County Highway Agency

About this bridge

Township Road over Idaho Canal is a prestressed concrete tee beam carrying Township Road over Idaho Canal in Bonneville County, Idaho. It was built in 1972, so it is 53 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 3,700 vehicles a day, projected to reach 5,550 by 2042. The structure is 38 ft (11.6 m) long and 32 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesTownship Road
CrossesIdaho Canal
Location1.0 S. 1.5 E. Idaho Falls
RouteCounty Highway 0
CountyBonneville County
StateIdaho
Coordinates43.45353, -112.01389
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.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionApril 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; action required to protect exposed foundations
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating50.6 US tons
Inventory rating32.7 US tons

Structure

Structure typeTee Beam
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadH 20
Structure length38 ft (11.6 m)
Longest span36 ft (11 m)
Deck width32 ft (9.7 m)
Roadway width30 ft (9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,700 (2023)
Projected traffic5,550 by 2042
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 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 proposedWidening of existing bridge without deck rehabilitation
Estimated improvement cost$102,000 (2020 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Township Road over Idaho Canal built?

It was built in 1972, making it 53 years old in 2025.

What condition is Township Road over Idaho 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 Township Road over Idaho Canal carry?

About 3,700 vehicles per day (2023 count).

How long is Township Road over Idaho Canal?

The structure is 38 ft (11.6 m) long with a longest span of 36 ft (11 m) and a deck 32 ft wide.

Who owns Township Road over Idaho Canal?

It is owned by the County Highway Agency.