US Bridges

I 90 Ebl & Wbl over I 90 EB Off;w.Mullan Ic

Fair

Shoshone County, Idaho · Mullan Scl · Structure no. 000000000017290

Built
1973
52 years old
Condition
Fair
inspected June 2024
Type
Slab
Concrete
Length
135 ft
3 main spans
Daily traffic
9,600
2023 count
Owner
State
State Highway Agency

About this bridge

I 90 Ebl & Wbl over I 90 EB Off;w.Mullan Ic is a concrete slab carrying I 90 Ebl & Wbl over I 90 EB Off;w.Mullan Ic 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 135 ft (41.1 m) long and 82 ft wide.

Location

Open in Google Maps
CarriesI 90 Ebl & Wbl
CrossesI 90 EB Off;w.Mullan Ic
LocationMullan Scl
RouteInterstate 90
CountyShoshone County
StateIdaho
Coordinates47.46636, -115.80136
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.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionJune 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating73 US tons
Inventory rating43 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length135 ft (41.1 m)
Longest span51 ft (15.5 m)
Deck width82 ft (24.9 m)
Roadway width79 ft (24 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
CarriesOverpass structure at an interchange
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 I 90 EB Off;w.Mullan Ic built?

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

What condition is I 90 Ebl & Wbl over I 90 EB Off;w.Mullan Ic 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 I 90 EB Off;w.Mullan Ic carry?

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

How long is I 90 Ebl & Wbl over I 90 EB Off;w.Mullan Ic?

The structure is 135 ft (41.1 m) long with a longest span of 51 ft (15.5 m) and a deck 82 ft wide.

Who owns I 90 Ebl & Wbl over I 90 EB Off;w.Mullan Ic?

It is owned by the State Highway Agency.