US Bridges

I 84 Ebl over Raft River

Fair

Cassia County, Idaho · 10.1 N. Sublett · Structure no. 000000000016450

Built
1973
52 years old
Condition
Fair
inspected May 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
51 ft
1 main span
Daily traffic
5,750
2023 count
Owner
State
State Highway Agency

About this bridge

I 84 Ebl over Raft River is a prestressed concrete stringer/multi-beam or girder carrying I 84 Ebl over Raft River in Cassia County, Idaho. It was built in 1973, so it is 52 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 5,750 vehicles a day, roughly 49% of them trucks, projected to reach 8,625 by 2042. The structure is 51 ft (15.5 m) long and 44 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesI 84 Ebl
CrossesRaft River
Location10.1 N. Sublett
RouteInterstate 84
StateIdaho
Coordinates42.43669, -113.34469
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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMay 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation6: Equal to present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating75.9 US tons
Inventory rating33 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length51 ft (15.5 m)
Longest span50 ft (15.2 m)
Deck width44 ft (13.3 m)
Roadway width41 ft (12.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5,750 (2023)
Projected traffic8,625 by 2042
Trucks49%
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 Ebl over Raft River built?

It was built in 1973, making it 52 years old in 2025.

What condition is I 84 Ebl over Raft River 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 May 2024.

How much traffic does I 84 Ebl over Raft River carry?

About 5,750 vehicles per day (2023 count), of which roughly 49% are trucks.

How long is I 84 Ebl over Raft River?

The structure is 51 ft (15.5 m) long with a longest span of 50 ft (15.2 m) and a deck 44 ft wide.

Who owns I 84 Ebl over Raft River?

It is owned by the State Highway Agency.