US Bridges

I 90 Ebl over I 90B;THIRD St.Ic

Fair

Shoshone County, Idaho · In Osburn;third St.Ic · Structure no. 000000000017195

Built
1969
56 years old
Condition
Fair
inspected April 2023
Type
Tee Beam
Concrete
Length
103 ft
3 main spans
Daily traffic
6,250
2023 count
Owner
State
State Highway Agency

About this bridge

I 90 Ebl over I 90B;THIRD St.Ic is a concrete tee beam carrying I 90 Ebl over I 90B;THIRD St.Ic in Shoshone County, Idaho. It was built in 1969, so it is 56 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 6,250 vehicles a day, roughly 23% of them trucks, projected to reach 9,375 by 2042. The structure is 103 ft (31.4 m) long and 40 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesI 90 Ebl
CrossesI 90B;THIRD St.Ic
LocationIn Osburn;third St.Ic
RouteInterstate 90
CountyShoshone County
StateIdaho
Coordinates47.50875, -115.99797
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.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionApril 2023
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 geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating78 US tons
Inventory rating46 US tons

Structure

Structure typeTee Beam
MaterialConcrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length103 ft (31.4 m)
Longest span40 ft (12.2 m)
Deck width40 ft (12.3 m)
Roadway width37 ft (11.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic6,250 (2023)
Projected traffic9,375 by 2042
Trucks23%
Lanes on structure2
Traffic directionOne-way traffic
CarriesOverpass structure at an interchange
CrossesHighway
Detour if closed1.2 mi (2 km)
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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$1.4 million (2017 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was I 90 Ebl over I 90B;THIRD St.Ic built?

It was built in 1969, making it 56 years old in 2025.

What condition is I 90 Ebl over I 90B;THIRD St.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 April 2023.

How much traffic does I 90 Ebl over I 90B;THIRD St.Ic carry?

About 6,250 vehicles per day (2023 count), of which roughly 23% are trucks.

How long is I 90 Ebl over I 90B;THIRD St.Ic?

The structure is 103 ft (31.4 m) long with a longest span of 40 ft (12.2 m) and a deck 40 ft wide.

Who owns I 90 Ebl over I 90B;THIRD St.Ic?

It is owned by the State Highway Agency.