US Bridges

SH 43 over Willow Creek

Good

Bonneville County, Idaho · 2.0 S. Ucon · Structure no. 000000000019016

Built
1994
31 years old
Condition
Good
inspected March 2022
Type
Frame
Concrete
Length
25 ft
1 main span
Daily traffic
7,200
2023 count
Owner
State
State Highway Agency

About this bridge

SH 43 over Willow Creek is a concrete frame carrying SH 43 over Willow Creek in Bonneville County, Idaho. It was built in 1994, so it is 31 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 7,200 vehicles a day, roughly 5% of them trucks, projected to reach 10,800 by 2042. The structure is 25 ft (7.6 m) long and 66 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesSH 43
CrossesWillow Creek
Location2.0 S. Ucon
RouteState Highway 43
CountyBonneville County
StateIdaho
Coordinates43.56639, -111.96397
Functional classRural Major Collector

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 inspectionMarch 2022
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry9: Superior to present desirable criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating99.9 US tons
Inventory rating92 US tons

Structure

Structure typeFrame
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 25 or greater
Structure length25 ft (7.6 m)
Longest span25 ft (7.6 m)
Deck width66 ft (20.1 m)
Roadway width64 ft (19.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic7,200 (2023)
Projected traffic10,800 by 2042
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 km)
TollOn a free road
National Highway SystemNo

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 SH 43 over Willow Creek built?

It was built in 1994, making it 31 years old in 2025.

What condition is SH 43 over 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 March 2022.

How much traffic does SH 43 over Willow Creek carry?

About 7,200 vehicles per day (2023 count), of which roughly 5% are trucks.

How long is SH 43 over Willow Creek?

The structure is 25 ft (7.6 m) long with a longest span of 25 ft (7.6 m) and a deck 66 ft wide.

Who owns SH 43 over Willow Creek?

It is owned by the State Highway Agency.