US Bridges

I 90 Ebl & Wbl over Copper Street Gs

Fair

Shoshone County, Idaho · In Mullan;copper Street · Structure no. 000000000017300

Built
1973
52 years old
Condition
Fair
inspected June 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
79 ft
1 main span
Daily traffic
9,600
2023 count
Owner
State
State Highway Agency

About this bridge

I 90 Ebl & Wbl over Copper Street Gs is a prestressed concrete stringer/multi-beam or girder carrying I 90 Ebl & Wbl over Copper Street Gs in Shoshone County, Idaho. It was built in 1973, so it is 52 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 9,600 vehicles a day, roughly 41% of them trucks, projected to reach 14,400 by 2042. The structure is 79 ft (24.1 m) long and 82 ft wide.

CarriesI 90 Ebl & Wbl
CrossesCopper Street Gs
LocationIn Mullan;copper Street
RouteInterstate 90
StateIdaho
Coordinates47.46892, -115.79494
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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJune 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating68 US tons
Inventory rating41 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length79 ft (24.1 m)
Longest span75 ft (22.9 m)
Deck width82 ft (24.9 m)
Roadway width77 ft (23.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic9,600 (2023)
Projected traffic14,400 by 2042
Trucks41%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
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—
NavigationNot applicable (no waterway)

Frequently asked questions

When was I 90 Ebl & Wbl over Copper Street Gs built?

It was built in 1973, making it 52 years old in 2025.

What condition is I 90 Ebl & Wbl over Copper Street Gs 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 2024.

How much traffic does I 90 Ebl & Wbl over Copper Street Gs carry?

About 9,600 vehicles per day (2023 count), of which roughly 41% are trucks.

How long is I 90 Ebl & Wbl over Copper Street Gs?

The structure is 79 ft (24.1 m) long with a longest span of 75 ft (22.9 m) and a deck 82 ft wide.

Who owns I 90 Ebl & Wbl over Copper Street Gs?

It is owned by the State Highway Agency.