US Bridges

I 84 Wbl over C Canal

Good

Jerome County, Idaho · 15.1 W. Burley · Structure no. 000000000016265

Built
1966
59 years old
Condition
Good
inspected November 2024
Type
Tee Beam
Concrete
Length
30 ft
1 main span
Daily traffic
11,500
2023 count
Owner
State
State Highway Agency

About this bridge

I 84 Wbl over C Canal is a concrete tee beam carrying I 84 Wbl over C Canal in Jerome County, Idaho. It was built in 1966, so it is 59 years old, older than the Idaho average of 45.3 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 11,500 vehicles a day, roughly 30% of them trucks, projected to reach 17,250 by 2042. The structure is 30 ft (9.1 m) long and 39 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesI 84 Wbl
CrossesC Canal
Location15.1 W. Burley
RouteInterstate 84
StateIdaho
Coordinates42.57623, -114.08208
Functional classRural Principal Arterial - Interstate

Condition and inspection

Good

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

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure8 Very GoodNo problems noted.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionNovember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating52 US tons
Inventory rating31 US tons

Structure

Structure typeTee Beam
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length30 ft (9.1 m)
Longest span28 ft (8.5 m)
Deck width39 ft (12 m)
Roadway width37 ft (11.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic11,500 (2023)
Projected traffic17,250 by 2042
Trucks30%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkInterstate STRAHNET route

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was I 84 Wbl over C Canal built?

It was built in 1966, making it 59 years old in 2025.

What condition is I 84 Wbl over C 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 November 2024.

How much traffic does I 84 Wbl over C Canal carry?

About 11,500 vehicles per day (2023 count), of which roughly 30% are trucks.

How long is I 84 Wbl over C Canal?

The structure is 30 ft (9.1 m) long with a longest span of 28 ft (8.5 m) and a deck 39 ft wide.

Who owns I 84 Wbl over C Canal?

It is owned by the State Highway Agency.