US Bridges

US 93 over Little Wood River

Fair

Blaine County, Idaho · 3.3 Sw. Carey · Structure no. 000000000013180

Built
1987
38 years old
Condition
Fair
inspected May 2022
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
41 ft
1 main span
Daily traffic
910
2023 count
Owner
State
State Highway Agency

About this bridge

US 93 over Little Wood River is a prestressed concrete box beam or girders - multiple carrying US 93 over Little Wood River in Blaine County, Idaho. It was built in 1987, so it is 38 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 910 vehicles a day, roughly 26% of them trucks, projected to reach 1,365 by 2042. The structure is 41 ft (12.5 m) long and 40 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

CarriesUS 93
CrossesLittle Wood River
Location3.3 Sw. Carey
RouteU.S. Route 93
StateIdaho
Coordinates43.25581, -113.9461
Functional classRural Principal Arterial - Other

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck8 Very GoodNo problems noted.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionMay 2022
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating83 US tons
Inventory rating49.1 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 25 or greater
Structure length41 ft (12.5 m)
Longest span38 ft (11.6 m)
Deck width40 ft (12.2 m)
Roadway width37 ft (11.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic910 (2023)
Projected traffic1,365 by 2042
Trucks26%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 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—
NavigationNo navigation control on waterway

Frequently asked questions

When was US 93 over Little Wood River built?

It was built in 1987, making it 38 years old in 2025.

What condition is US 93 over Little Wood River 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 May 2022.

How much traffic does US 93 over Little Wood River carry?

About 910 vehicles per day (2023 count), of which roughly 26% are trucks.

How long is US 93 over Little Wood River?

The structure is 41 ft (12.5 m) long with a longest span of 38 ft (11.6 m) and a deck 40 ft wide.

Who owns US 93 over Little Wood River?

It is owned by the State Highway Agency.