US Bridges

Canyon Road over Wilson Creek

FairPosted for load

Kittitas County, Washington · 00.75 N Tjossem RD · Structure no. 081589000000000

Built
1930
95 years old, rebuilt 2000
Condition
Fair
inspected September 2024
Type
Slab
Concrete Continuous
Length
78 ft
3 main spans
Daily traffic
4,692
2023 count
Owner
County
County Highway Agency

About this bridge

Canyon Road over Wilson Creek is a concrete continuous slab carrying Canyon Road over Wilson Creek in Kittitas County, Washington. It was built in 1930 and reconstructed in 2000, so it is 95 years old, older than the Washington average of 49.8 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. Its operating status is: posted for load restriction.

It carries about 4,692 vehicles a day, roughly 21% of them trucks, projected to reach 12,433 by 2043. The structure is 78 ft (23.8 m) long and 43 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesCanyon Road
CrossesWilson Creek
Location00.75 N Tjossem RD
RouteCounty Highway 96076
CountyKittitas County
StateWashington
Coordinates46.96848, -120.53703
Functional classRural Major Collector

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.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating26.1 US tons
Inventory rating20.4 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 25 or greater
Structure length78 ft (23.8 m)
Longest span18 ft (5.5 m)
Deck width43 ft (13.1 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,692 (2023)
Projected traffic12,433 by 2043
Trucks21%
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

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 Canyon Road over Wilson Creek built?

It was built in 1930, making it 95 years old in 2025. It was reconstructed in 2000.

What condition is Canyon Road over Wilson 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 September 2024.

How much traffic does Canyon Road over Wilson Creek carry?

About 4,692 vehicles per day (2023 count), of which roughly 21% are trucks.

How long is Canyon Road over Wilson Creek?

The structure is 78 ft (23.8 m) long with a longest span of 18 ft (5.5 m) and a deck 43 ft wide.

Who owns Canyon Road over Wilson Creek?

It is owned by the County Highway Agency.