US Bridges

Wilson Creek Road over Cascade Canal

Fair

Kittitas County, Washington · 00.12 N J Ronald RD · Structure no. 084334000000000

Built
1930
95 years old, rebuilt 1964
Condition
Fair
inspected November 2024
Type
Channel Beam
Concrete Continuous
Length
24 ft
1 main span
Daily traffic
2,578
2023 count
Owner
County
County Highway Agency

About this bridge

Wilson Creek Road over Cascade Canal is a concrete continuous channel beam carrying Wilson Creek Road over Cascade Canal in Kittitas County, Washington. It was built in 1930 and reconstructed in 1964, 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.

It carries about 2,578 vehicles a day, roughly 25% of them trucks, projected to reach 6,831 by 2043. The structure is 24 ft (7.3 m) long and 24 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesWilson Creek Road
CrossesCascade Canal
Location00.12 N J Ronald RD
RouteCounty Highway 94126
CountyKittitas County
StateWashington
Coordinates47.00889, -120.49731
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.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionNovember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating34.9 US tons
Inventory rating27 US tons

Structure

Structure typeChannel Beam
MaterialConcrete Continuous
DeckOther
Main spans1
Design loadH 20
Structure length24 ft (7.3 m)
Longest span23 ft (7 m)
Deck width24 ft (7.3 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,578 (2023)
Projected traffic6,831 by 2043
Trucks25%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed3.1 mi (5 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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$1.2 million (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Wilson Creek Road over Cascade Canal built?

It was built in 1930, making it 95 years old in 2025. It was reconstructed in 1964.

What condition is Wilson Creek Road over Cascade Canal 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 November 2024.

How much traffic does Wilson Creek Road over Cascade Canal carry?

About 2,578 vehicles per day (2023 count), of which roughly 25% are trucks.

How long is Wilson Creek Road over Cascade Canal?

The structure is 24 ft (7.3 m) long with a longest span of 23 ft (7 m) and a deck 24 ft wide.

Who owns Wilson Creek Road over Cascade Canal?

It is owned by the County Highway Agency.