US Bridges

I 90B Loop over S.Fk.Coeur Dalene River

Good

Shoshone County, Idaho · In Mullan · Structure no. 000000000017376

Built
2014
11 years old
Condition
Good
inspected September 2022
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
49 ft
1 main span
Daily traffic
1,000
2023 count
Owner
State
State Highway Agency

About this bridge

I 90B Loop over S.Fk.Coeur Dalene River is a prestressed concrete box beam or girders - multiple carrying I 90B Loop over S.Fk.Coeur Dalene River in Shoshone County, Idaho. It was built in 2014, so it is 11 years old, younger than the Idaho average of 45.3 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 1,000 vehicles a day, roughly 10% of them trucks, projected to reach 1,500 by 2042. The structure is 49 ft (14.9 m) long and 52 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesI 90B Loop
CrossesS.Fk.Coeur Dalene River
LocationIn Mullan
RouteInterstate 90
StateIdaho
Coordinates47.46978, -115.79889
Functional classRural Major Collector

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure8 Very GoodNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionSeptember 2022
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry9: Superior to present desirable criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating60.4 US tons
Inventory rating45.7 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1
Design loadHL 93
Structure length49 ft (14.9 m)
Longest span46 ft (14 m)
Deck width52 ft (15.8 m)
Roadway width51 ft (15.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,000 (2023)
Projected traffic1,500 by 2042
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemNo

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 90B Loop over S.Fk.Coeur Dalene River built?

It was built in 2014, making it 11 years old in 2025.

What condition is I 90B Loop over S.Fk.Coeur Dalene River in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in September 2022.

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

About 1,000 vehicles per day (2023 count), of which roughly 10% are trucks.

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

The structure is 49 ft (14.9 m) long with a longest span of 46 ft (14 m) and a deck 52 ft wide.

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

It is owned by the State Highway Agency.