US Bridges

Big Willow RD over Big Willow Creek

Good

Payette County, Idaho · 2.2N 1.5E New Plymouth · Structure no. 000000000028490

Built
1988
37 years old
Condition
Good
inspected June 2024
Type
Tee Beam
Prestressed Concrete
Length
65 ft
1 main span
Daily traffic
130
2023 count
Owner
County
County Highway Agency

About this bridge

Big Willow RD over Big Willow Creek is a prestressed concrete tee beam carrying Big Willow RD over Big Willow Creek in Payette County, Idaho. It was built in 1988, so it is 37 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 130 vehicles a day, roughly 10% of them trucks, projected to reach 195 by 2039. The structure is 65 ft (19.8 m) long and 27 ft wide. If it were closed, the detour would be 11.8 mi (19 km).

CarriesBig Willow RD
CrossesBig Willow Creek
Location2.2N 1.5E New Plymouth
RouteCounty Highway 0
StateIdaho
Coordinates44.00656, -116.79008
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 protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJune 2024
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment4: Meets minimum tolerable limits to be left in place as is
Operating rating59.5 US tons
Inventory rating42.7 US tons

Structure

Structure typeTee Beam
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length65 ft (19.8 m)
Longest span62 ft (18.9 m)
Deck width27 ft (8.1 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic130 (2023)
Projected traffic195 by 2039
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed11.8 mi (19 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 Big Willow RD over Big Willow Creek built?

It was built in 1988, making it 37 years old in 2025.

What condition is Big Willow RD over Big Willow Creek 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 June 2024.

How much traffic does Big Willow RD over Big Willow Creek carry?

About 130 vehicles per day (2023 count), of which roughly 10% are trucks.

How long is Big Willow RD over Big Willow Creek?

The structure is 65 ft (19.8 m) long with a longest span of 62 ft (18.9 m) and a deck 27 ft wide.

Who owns Big Willow RD over Big Willow Creek?

It is owned by the County Highway Agency.