US Bridges

Sanders Road over Wilson Creek

Fair

Kittitas County, Washington · 00.27 NW Game Farm · Structure no. 084059000000000

Built
1955
70 years old, rebuilt 1971
Condition
Fair
inspected November 2024
Type
Channel Beam
Concrete
Length
22 ft
1 main span
Daily traffic
2,031
2022 count
Owner
County
County Highway Agency

About this bridge

Sanders Road over Wilson Creek is a concrete channel beam carrying Sanders Road over Wilson Creek in Kittitas County, Washington. It was built in 1955 and reconstructed in 1971, so it is 70 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 2,031 vehicles a day, roughly 19% of them trucks, projected to reach 5,382 by 2042. The structure is 22 ft (6.7 m) long and 30 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesSanders Road
CrossesWilson Creek
Location00.27 NW Game Farm
RouteCounty Highway 40315
CountyKittitas County
StateWashington
Coordinates47.01728, -120.51724
Functional classUrban 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 protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
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 geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating68 US tons
Inventory rating41 US tons

Structure

Structure typeChannel Beam
MaterialConcrete
DeckOther
Main spans1
Design loadHS 20
Structure length22 ft (6.7 m)
Longest span22 ft (6.6 m)
Deck width30 ft (9.1 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,031 (2022)
Projected traffic5,382 by 2042
Trucks19%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed3.7 mi (6 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 Sanders Road over Wilson Creek built?

It was built in 1955, making it 70 years old in 2025. It was reconstructed in 1971.

What condition is Sanders 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 November 2024.

How much traffic does Sanders Road over Wilson Creek carry?

About 2,031 vehicles per day (2022 count), of which roughly 19% are trucks.

How long is Sanders Road over Wilson Creek?

The structure is 22 ft (6.7 m) long with a longest span of 22 ft (6.6 m) and a deck 30 ft wide.

Who owns Sanders Road over Wilson Creek?

It is owned by the County Highway Agency.