US Bridges

Baseline Road over Willow Creek

Fair

Camas County, Idaho · 2.1 N. 11.5 E. Fairfield · Structure no. 000000000023905

Built
1989
36 years old
Condition
Fair
inspected June 2024
Type
Frame
Concrete
Length
22 ft
1 main span
Daily traffic
190
2023 count
Owner
County
County Highway Agency

About this bridge

Baseline Road over Willow Creek is a concrete frame carrying Baseline Road over Willow Creek in Camas County, Idaho. It was built in 1989, so it is 36 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 190 vehicles a day, roughly 6% of them trucks, projected to reach 285 by 2042. The structure is 22 ft (6.6 m) long and 24 ft wide. If it were closed, the detour would be 5.6 mi (9 km).

CarriesBaseline Road
CrossesWillow Creek
Location2.1 N. 11.5 E. Fairfield
RouteCounty Highway 0
StateIdaho
Coordinates43.37072, -114.56567
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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJune 2024
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating61.9 US tons
Inventory rating37 US tons

Structure

Structure typeFrame
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length22 ft (6.6 m)
Longest span20 ft (6.1 m)
Deck width24 ft (7.3 m)
Roadway width24 ft (7.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic190 (2023)
Projected traffic285 by 2042
Trucks6%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed5.6 mi (9 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 Baseline Road over Willow Creek built?

It was built in 1989, making it 36 years old in 2025.

What condition is Baseline Road over 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 Baseline Road over Willow Creek carry?

About 190 vehicles per day (2023 count), of which roughly 6% are trucks.

How long is Baseline Road over Willow Creek?

The structure is 22 ft (6.6 m) long with a longest span of 20 ft (6.1 m) and a deck 24 ft wide.

Who owns Baseline Road over Willow Creek?

It is owned by the County Highway Agency.