US Bridges

I 84 Wbl over Snake River

Good

Minidoka County, Idaho · 3.0 N. Declo · Structure no. 000000000016396

Built
2016
9 years old
Condition
Good
inspected April 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
1,004 ft
6 main spans
Daily traffic
9,750
2023 count
Owner
State
State Highway Agency

About this bridge

I 84 Wbl over Snake River is a steel continuous stringer/multi-beam or girder carrying I 84 Wbl over Snake River in Minidoka County, Idaho. It was built in 2016, so it is 9 years old, younger 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 9,750 vehicles a day, roughly 32% of them trucks, projected to reach 14,625 by 2042. The structure is 1,004 ft (306 m) long and 46 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesI 84 Wbl
CrossesSnake River
Location3.0 N. Declo
RouteInterstate 84
CountyMinidoka County
StateIdaho
Coordinates42.56897, -113.62892
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.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionApril 2024
Inspection intervalevery 48 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 rating55.3 US tons
Inventory rating42.9 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans6
Design loadHL 93
Structure length1,004 ft (306 m)
Longest span180 ft (54.9 m)
Deck width46 ft (13.9 m)
Roadway width43 ft (13 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic9,750 (2023)
Projected traffic14,625 by 2042
Trucks32%
Lanes on structure2
Traffic directionTwo-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 Snake River built?

It was built in 2016, making it 9 years old in 2025.

What condition is I 84 Wbl over Snake River 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 April 2024.

How much traffic does I 84 Wbl over Snake River carry?

About 9,750 vehicles per day (2023 count), of which roughly 32% are trucks.

How long is I 84 Wbl over Snake River?

The structure is 1,004 ft (306 m) long with a longest span of 180 ft (54.9 m) and a deck 46 ft wide.

Who owns I 84 Wbl over Snake River?

It is owned by the State Highway Agency.