US Bridges

Cheney-Plaza Road over Columbia Plateau Trail

Fair

Spokane County, Washington · 1.4 S Psh No 904 · Structure no. 083436000000000

Built
1936
89 years old
Condition
Fair
inspected August 2024
Type
Stringer/Multi-beam or Girder
Concrete Continuous
Length
159 ft
3 main spans
Daily traffic
1,212
2020 count
Owner
County
County Highway Agency

About this bridge

Cheney-Plaza Road over Columbia Plateau Trail is a concrete continuous stringer/multi-beam or girder carrying Cheney-Plaza Road over Columbia Plateau Trail in Spokane County, Washington. It was built in 1936, so it is 89 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 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 1,212 vehicles a day, roughly 17% of them trucks, projected to reach 1,745 by 2042. The structure is 159 ft (48.5 m) long and 30 ft wide. If it were closed, the detour would be 19.9 mi (32 km).

Location

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CarriesCheney-Plaza Road
CrossesColumbia Plateau Trail
Location1.4 S Psh No 904
RouteCounty Highway 577
CountySpokane County
StateWashington
Coordinates47.46188, -117.58035
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Last inspectionAugust 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
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
Approach roadway alignment8: Equal to present desirable criteria
Operating rating29.3 US tons
Inventory rating22.5 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadH 15
Structure length159 ft (48.5 m)
Longest span60 ft (18.3 m)
Deck width30 ft (9.1 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,212 (2020)
Projected traffic1,745 by 2042
Trucks17%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesPedestrian / bicycle
Detour if closed19.9 mi (32 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$6.1 million (2022 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was Cheney-Plaza Road over Columbia Plateau Trail built?

It was built in 1936, making it 89 years old in 2025.

What condition is Cheney-Plaza Road over Columbia Plateau Trail 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 August 2024.

How much traffic does Cheney-Plaza Road over Columbia Plateau Trail carry?

About 1,212 vehicles per day (2020 count), of which roughly 17% are trucks.

How long is Cheney-Plaza Road over Columbia Plateau Trail?

The structure is 159 ft (48.5 m) long with a longest span of 60 ft (18.3 m) and a deck 30 ft wide.

Who owns Cheney-Plaza Road over Columbia Plateau Trail?

It is owned by the County Highway Agency.