US Bridges

Chattaroy Road over Little Spokane River

FairPosted for load

Spokane County, Washington · Chattaroy · Structure no. 084625000000000

Built
1953
72 years old
Condition
Fair
inspected September 2024
Type
Stringer/Multi-beam or Girder
Concrete
Length
45 ft
1 main span
Daily traffic
1,387
2019 count
Owner
County
County Highway Agency

About this bridge

Chattaroy Road over Little Spokane River is a concrete stringer/multi-beam or girder carrying Chattaroy Road over Little Spokane River in Spokane County, Washington. It was built in 1953, so it is 72 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 1,387 vehicles a day, roughly 16% of them trucks, projected to reach 1,997 by 2041. The structure is 45 ft (13.7 m) long and 28 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

CarriesChattaroy Road
CrossesLittle Spokane River
LocationChattaroy
RouteCounty Highway 574
Coordinates47.88936, -117.35638
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
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 inspectionSeptember 2024
Inspection intervalevery 12 months
Operating statusPosted for load restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation2: Basically intolerable, requiring high priority of replacement
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating10.7 US tons
Inventory rating8.3 US tons

Structure

MaterialConcrete
DeckConcrete, precast panels
Main spans1
Design loadHS 15
Structure length45 ft (13.7 m)
Longest span44 ft (13.4 m)
Deck width28 ft (8.6 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,387 (2019)
Projected traffic1,997 by 2041
Trucks16%
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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$2 million (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Chattaroy Road over Little Spokane River built?

It was built in 1953, making it 72 years old in 2025.

What condition is Chattaroy Road over Little Spokane River 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 Chattaroy Road over Little Spokane River carry?

About 1,387 vehicles per day (2019 count), of which roughly 16% are trucks.

How long is Chattaroy Road over Little Spokane River?

The structure is 45 ft (13.7 m) long with a longest span of 44 ft (13.4 m) and a deck 28 ft wide.

Who owns Chattaroy Road over Little Spokane River?

It is owned by the County Highway Agency.