US Bridges

Stone Quarry over Little Willow Creek

Fair

Payette County, Idaho · 9.1N 6.3E New Plymouth · Structure no. 000000000028345

Built
1950
75 years old, rebuilt 1981
Condition
Fair
inspected June 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
41 ft
1 main span
Daily traffic
30
2023 count
Owner
County
County Highway Agency

About this bridge

Stone Quarry over Little Willow Creek is a steel stringer/multi-beam or girder carrying Stone Quarry over Little Willow Creek in Payette County, Idaho. It was built in 1950 and reconstructed in 1981, so it is 75 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 30 vehicles a day, roughly 10% of them trucks, projected to reach 45 by 2039. The structure is 41 ft (12.5 m) long and 20 ft wide. If it were closed, the detour would be 14.3 mi (23 km).

CarriesStone Quarry
CrossesLittle Willow Creek
Location9.1N 6.3E New Plymouth
RouteCounty Highway 0
StateIdaho
Coordinates44.10561, -116.69154
Functional classRural Local

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.
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.
Channel and channel protection5 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
ScourFoundations stable; action required to protect exposed foundations
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating60.5 US tons
Inventory rating39.7 US tons

Structure

MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length41 ft (12.5 m)
Longest span38 ft (11.6 m)
Deck width20 ft (6.1 m)
Roadway width19 ft (5.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic30 (2023)
Projected traffic45 by 2039
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed14.3 mi (23 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty 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 Stone Quarry over Little Willow Creek built?

It was built in 1950, making it 75 years old in 2025. It was reconstructed in 1981.

What condition is Stone Quarry over Little Willow Creek 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 Stone Quarry over Little Willow Creek carry?

About 30 vehicles per day (2023 count), of which roughly 10% are trucks.

How long is Stone Quarry over Little Willow Creek?

The structure is 41 ft (12.5 m) long with a longest span of 38 ft (11.6 m) and a deck 20 ft wide.

Who owns Stone Quarry over Little Willow Creek?

It is owned by the County Highway Agency.