US Bridges

I 90 over I 90B;CANYON CR

Fair

Shoshone County, Idaho · In Wallace · Structure no. 000000000017247

Built
1991
34 years old
Condition
Fair
inspected November 2023
Type
Box Beam or Girders - Single or Spread
Prestressed Concrete Continuous
Length
4,478 ft
34 main spans
Daily traffic
11,000
2023 count
Owner
State
State Highway Agency

About this bridge

I 90 over I 90B;CANYON CR is a prestressed concrete continuous box beam or girders - single or spread carrying I 90 over I 90B;CANYON CR in Shoshone County, Idaho. It was built in 1991, so it is 34 years old, younger 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 31% of them trucks, projected to reach 16,500 by 2042. The structure is 4,478 ft (1,364.9 m) long and 84 ft wide.

Location

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CarriesI 90
CrossesI 90B;CANYON CR
LocationIn Wallace
RouteInterstate 90
CountyShoshone County
StateIdaho
Coordinates47.47561, -115.92869
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.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionNovember 2023
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations on dry land well above flood water elevations
Structural evaluation3: Basically intolerable, requiring high priority of corrective action
Deck geometry9: Superior to present desirable criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating28 US tons
Inventory rating11 US tons

Structure

Structure typeBox Beam or Girders - Single or Spread
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans34
Design loadHS 25 or greater
Structure length4,478 ft (1,364.9 m)
Longest span150 ft (45.7 m)
Deck width84 ft (25.5 m)
Roadway width79 ft (24 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic11,000 (2023)
Projected traffic16,500 by 2042
Trucks31%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway and waterway
Detour if closed—
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 over I 90B;CANYON CR built?

It was built in 1991, making it 34 years old in 2025.

What condition is I 90 over I 90B;CANYON CR 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 November 2023.

How much traffic does I 90 over I 90B;CANYON CR carry?

About 11,000 vehicles per day (2023 count), of which roughly 31% are trucks.

How long is I 90 over I 90B;CANYON CR?

The structure is 4,478 ft (1,364.9 m) long with a longest span of 150 ft (45.7 m) and a deck 84 ft wide.

Who owns I 90 over I 90B;CANYON CR?

It is owned by the State Highway Agency.