US Bridges

I 90 EB & WB over S.Fk.Cda R;fr.Rd.

Fair

Shoshone County, Idaho · 1.9 W. Wallace · Structure no. 000000000017225

Built
1978
47 years old
Condition
Fair
inspected June 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
569 ft
6 main spans
Daily traffic
11,000
2023 count
Owner
State
State Highway Agency

About this bridge

I 90 EB & WB over S.Fk.Cda R;fr.Rd. is a prestressed concrete stringer/multi-beam or girder carrying I 90 EB & WB over S.Fk.Cda R;fr.Rd. in Shoshone County, Idaho. It was built in 1978, so it is 47 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 11,000 vehicles a day, roughly 36% of them trucks, projected to reach 16,500 by 2042. The structure is 569 ft (173.4 m) long and 82 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesI 90 EB & WB
CrossesS.Fk.Cda R;fr.Rd.
Location1.9 W. Wallace
RouteInterstate 90
CountyShoshone County
StateIdaho
Coordinates47.48864, -115.94953
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure8 Very GoodNo problems noted.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJune 2023
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Deck geometry9: Superior to present desirable criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating84 US tons
Inventory rating43 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans6
Design loadHS 20
Structure length569 ft (173.4 m)
Longest span96 ft (29.4 m)
Deck width82 ft (24.9 m)
Roadway width76 ft (23.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic11,000 (2023)
Projected traffic16,500 by 2042
Trucks36%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway and waterway
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 90 EB & WB over S.Fk.Cda R;fr.Rd. built?

It was built in 1978, making it 47 years old in 2025.

What condition is I 90 EB & WB over S.Fk.Cda R;fr.Rd. 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 June 2023.

How much traffic does I 90 EB & WB over S.Fk.Cda R;fr.Rd. carry?

About 11,000 vehicles per day (2023 count), of which roughly 36% are trucks.

How long is I 90 EB & WB over S.Fk.Cda R;fr.Rd.?

The structure is 569 ft (173.4 m) long with a longest span of 96 ft (29.4 m) and a deck 82 ft wide.

Who owns I 90 EB & WB over S.Fk.Cda R;fr.Rd.?

It is owned by the State Highway Agency.