US Bridges

W. Willow-Big Owl over Crooked River

Good

Boise County, Idaho · 2 MI E. of Edna Creek Cg · Structure no. 040203000001056

Built
1971
54 years old
Condition
Good
inspected September 2024
Type
Stringer/Multi-beam or Girder
Wood or Timber
Length
42 ft
1 main span
Daily traffic
15
2018 count
Owner
Federal
U.S. Forest Service

About this bridge

W. Willow-Big Owl over Crooked River is a wood or timber stringer/multi-beam or girder carrying W. Willow-Big Owl over Crooked River in Boise County, Idaho. It was built in 1971, so it is 54 years old, older 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 15 vehicles a day, projected to reach 22 by 2045. The structure is 42 ft (12.8 m) long and 15 ft wide. If it were closed, the detour would be 18.6 mi (30 km).

CarriesW. Willow-Big Owl
CrossesCrooked River
Location2 MI E. of Edna Creek Cg
RouteFederal Lands Road 328
StateIdaho
Coordinates43.96448, -115.58663
Functional classRural Local

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.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating39.2 US tons
Inventory rating30.3 US tons

Structure

MaterialWood or Timber
DeckWood or timber
Main spans1
Design loadH 20
Structure length42 ft (12.8 m)
Longest span41 ft (12.5 m)
Deck width15 ft (4.7 m)
Roadway width14 ft (4.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic15 (2018)
Projected traffic22 by 2045
Trucks—
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed18.6 mi (30 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerU.S. Forest Service
Maintained byU.S. Forest Service
Historic statusHistorical significance not determinable at this time
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was W. Willow-Big Owl over Crooked River built?

It was built in 1971, making it 54 years old in 2025.

What condition is W. Willow-Big Owl over Crooked 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 2024.

How much traffic does W. Willow-Big Owl over Crooked River carry?

About 15 vehicles per day (2018 count).

How long is W. Willow-Big Owl over Crooked River?

The structure is 42 ft (12.8 m) long with a longest span of 41 ft (12.5 m) and a deck 15 ft wide.

Who owns W. Willow-Big Owl over Crooked River?

It is owned by the U.S. Forest Service.