US Bridges

I 90RAMP WB on over Bike/Ped Underpass

Fair

Shoshone County, Idaho · In Wallace · Structure no. 000000000017252

Built
1991
34 years old
Condition
Fair
inspected November 2023
Type
Box Beam or Girders - Single or Spread
Prestressed Concrete Continuous
Length
391 ft
3 main spans
Daily traffic
800
2023 count
Owner
State
State Highway Agency

About this bridge

I 90RAMP WB on over Bike/Ped Underpass is a prestressed concrete continuous box beam or girders - single or spread carrying I 90RAMP WB on over Bike/Ped Underpass 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 800 vehicles a day, projected to reach 1,200 by 2042. The structure is 391 ft (119.2 m) long and 28 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesI 90RAMP WB on
CrossesBike/Ped Underpass
LocationIn Wallace
RouteInterstate 90
CountyShoshone County
StateIdaho
Coordinates47.47197, -115.91842
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.
Substructure7 GoodSome minor problems.
Last inspectionNovember 2023
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating47 US tons
Inventory rating29 US tons

Structure

Structure typeBox Beam or Girders - Single or Spread
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 25 or greater
Structure length391 ft (119.2 m)
Longest span247 ft (75.3 m)
Deck width28 ft (8.4 m)
Roadway width25 ft (7.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic800 (2023)
Projected traffic1,200 by 2042
Trucks0%
Lanes on structure1
Traffic directionOne-way traffic
CarriesHighway
CrossesPedestrian / bicycle
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes

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—
NavigationNot applicable (no waterway)

Frequently asked questions

When was I 90RAMP WB on over Bike/Ped Underpass built?

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

What condition is I 90RAMP WB on over Bike/Ped Underpass 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 90RAMP WB on over Bike/Ped Underpass carry?

About 800 vehicles per day (2023 count).

How long is I 90RAMP WB on over Bike/Ped Underpass?

The structure is 391 ft (119.2 m) long with a longest span of 247 ft (75.3 m) and a deck 28 ft wide.

Who owns I 90RAMP WB on over Bike/Ped Underpass?

It is owned by the State Highway Agency.