US Bridges

I 84 Wbl over J Coulee Canal

Fair

Jerome County, Idaho · 0.5 W. Jerome · Structure no. 000000000016140

Built
1954
71 years old
Condition
Fair
inspected March 2023
Type
Tee Beam
Concrete
Length
32 ft
1 main span
Daily traffic
12,500
2023 count
Owner
State
State Highway Agency

About this bridge

I 84 Wbl over J Coulee Canal is a concrete tee beam carrying I 84 Wbl over J Coulee Canal in Jerome County, Idaho. It was built in 1954, so it is 71 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 12,500 vehicles a day, roughly 29% of them trucks, projected to reach 18,750 by 2042. The structure is 32 ft (9.8 m) long and 40 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesI 84 Wbl
CrossesJ Coulee Canal
Location0.5 W. Jerome
RouteInterstate 84
CountyJerome County
StateIdaho
Coordinates42.72851, -114.55315
Functional classRural Principal Arterial - Interstate

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 protection8 Very GoodNo problems noted.
Last inspectionMarch 2023
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating64 US tons
Inventory rating38 US tons

Structure

Structure typeTee Beam
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length32 ft (9.8 m)
Longest span30 ft (9.1 m)
Deck width40 ft (12.2 m)
Roadway width38 ft (11.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic12,500 (2023)
Projected traffic18,750 by 2042
Trucks29%
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 J Coulee Canal built?

It was built in 1954, making it 71 years old in 2025.

What condition is I 84 Wbl over J Coulee 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 March 2023.

How much traffic does I 84 Wbl over J Coulee Canal carry?

About 12,500 vehicles per day (2023 count), of which roughly 29% are trucks.

How long is I 84 Wbl over J Coulee Canal?

The structure is 32 ft (9.8 m) long with a longest span of 30 ft (9.1 m) and a deck 40 ft wide.

Who owns I 84 Wbl over J Coulee Canal?

It is owned by the State Highway Agency.