US Bridges

Chattaroy Road over Dragoon Creek

Good

Spokane County, Washington · 1.0 Mi. W Chattaroy RD · Structure no. 088229000000000

Built
2010
15 years old
Condition
Good
inspected October 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
85 ft
1 main span
Daily traffic
446
2019 count
Owner
County
County Highway Agency

About this bridge

Chattaroy Road over Dragoon Creek is a prestressed concrete stringer/multi-beam or girder carrying Chattaroy Road over Dragoon Creek in Spokane County, Washington. It was built in 2010, so it is 15 years old, younger than the Washington average of 49.8 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 446 vehicles a day, roughly 14% of them trucks, projected to reach 642 by 2041. The structure is 85 ft (25.9 m) long and 33 ft wide. If it were closed, the detour would be 6.8 mi (11 km).

CarriesChattaroy Road
CrossesDragoon Creek
Location1.0 Mi. W Chattaroy RD
RouteCounty Highway 574
Coordinates47.88704, -117.38404
Functional classRural Local

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure8 Very GoodNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionOctober 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating47.2 US tons
Inventory rating36.4 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length85 ft (25.9 m)
Longest span78 ft (23.8 m)
Deck width33 ft (10 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic446 (2019)
Projected traffic642 by 2041
Trucks14%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.8 mi (11 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 proposedOther structural work, including hydraulic replacements
Estimated improvement cost$1.1 million (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Chattaroy Road over Dragoon Creek built?

It was built in 2010, making it 15 years old in 2025.

What condition is Chattaroy Road over Dragoon Creek in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in October 2023.

How much traffic does Chattaroy Road over Dragoon Creek carry?

About 446 vehicles per day (2019 count), of which roughly 14% are trucks.

How long is Chattaroy Road over Dragoon Creek?

The structure is 85 ft (25.9 m) long with a longest span of 78 ft (23.8 m) and a deck 33 ft wide.

Who owns Chattaroy Road over Dragoon Creek?

It is owned by the County Highway Agency.