US Bridges

I 90 Wbl over S.Fk.Coeur Dalene River

Fair

Shoshone County, Idaho · 2.8 W. Wallace · Structure no. 000000000017215

Built
1978
47 years old
Condition
Fair
inspected September 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
184 ft
3 main spans
Daily traffic
5,750
2023 count
Owner
State
State Highway Agency

About this bridge

I 90 Wbl over S.Fk.Coeur Dalene River is a prestressed concrete stringer/multi-beam or girder carrying I 90 Wbl over S.Fk.Coeur Dalene River 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 5 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 26% of them trucks, projected to reach 8,625 by 2042. The structure is 184 ft (56.1 m) long and 44 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesI 90 Wbl
CrossesS.Fk.Coeur Dalene River
Location2.8 W. Wallace
RouteInterstate 90
CountyShoshone County
StateIdaho
Coordinates47.49117, -115.96625
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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry7: Better than present minimum criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating81 US tons
Inventory rating50 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length184 ft (56.1 m)
Longest span61 ft (18.6 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
Trucks26%
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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$2 million (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was I 90 Wbl over S.Fk.Coeur Dalene River built?

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

What condition is I 90 Wbl over S.Fk.Coeur Dalene 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 September 2024.

How much traffic does I 90 Wbl over S.Fk.Coeur Dalene River carry?

About 5,750 vehicles per day (2023 count), of which roughly 26% are trucks.

How long is I 90 Wbl over S.Fk.Coeur Dalene River?

The structure is 184 ft (56.1 m) long with a longest span of 61 ft (18.6 m) and a deck 44 ft wide.

Who owns I 90 Wbl over S.Fk.Coeur Dalene River?

It is owned by the State Highway Agency.