US Bridges

South 1st East RD over Idaho Canal

Fair

Bonneville County, Idaho · 6.5 S. 0.5 E. Idaho Falls · Structure no. 000000000031105

Built
1964
61 years old
Condition
Fair
inspected April 2024
Type
Tee Beam
Prestressed Concrete
Length
42 ft
1 main span
Daily traffic
960
2023 count
Owner
County
County Highway Agency

About this bridge

South 1st East RD over Idaho Canal is a prestressed concrete tee beam carrying South 1st East RD over Idaho Canal in Bonneville 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 960 vehicles a day, roughly 1% of them trucks, projected to reach 1,440 by 2042. The structure is 42 ft (12.8 m) long and 27 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

Location

Open in Google Maps
CarriesSouth 1st East RD
CrossesIdaho Canal
Location6.5 S. 0.5 E. Idaho Falls
RouteCounty Highway 0
CountyBonneville County
StateIdaho
Coordinates43.37169, -112.03389
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.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionApril 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; action required to protect exposed foundations
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
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 rating38 US tons
Inventory rating23 US tons

Structure

Structure typeTee Beam
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1
Design loadH 20
Structure length42 ft (12.8 m)
Longest span39 ft (11.9 m)
Deck width27 ft (8.2 m)
Roadway width25 ft (7.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic960 (2023)
Projected traffic1,440 by 2042
Trucks1%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed0.6 mi (1 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$548,000 (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was South 1st East RD over Idaho Canal built?

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

What condition is South 1st East RD 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 South 1st East RD over Idaho Canal carry?

About 960 vehicles per day (2023 count), of which roughly 1% are trucks.

How long is South 1st East RD over Idaho Canal?

The structure is 42 ft (12.8 m) long with a longest span of 39 ft (11.9 m) and a deck 27 ft wide.

Who owns South 1st East RD over Idaho Canal?

It is owned by the County Highway Agency.