US Bridges

Rose Valley RD over Coweeman River

Fair

Cowlitz County, Washington · 9.41 E Old 99 S (mp 1.06) · Structure no. 081641000000000

Built
1974
51 years old
Condition
Fair
inspected March 2023
Type
Slab
Concrete Continuous
Length
172 ft
3 main spans
Daily traffic
420
2018 count
Owner
County
County Highway Agency

About this bridge

Rose Valley RD over Coweeman River is a concrete continuous slab carrying Rose Valley RD over Coweeman River in Cowlitz County, Washington. It was built in 1974, so it is 51 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 420 vehicles a day, roughly 9% of them trucks, projected to reach 570 by 2039. The structure is 172 ft (52.4 m) long and 39 ft wide. If it were closed, the detour would be 98.8 mi (159 km).

Location

Open in Google Maps
CarriesRose Valley RD
CrossesCoweeman River
Location9.41 E Old 99 S (mp 1.06)
RouteCounty Highway 40110
CountyCowlitz County
StateWashington
Coordinates46.17389, -122.75667
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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionMarch 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment3: Basically intolerable, requiring high priority of corrective action
Operating rating75.9 US tons
Inventory rating45 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length172 ft (52.4 m)
Longest span78 ft (23.8 m)
Deck width39 ft (11.9 m)
Roadway width30 ft (9.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic420 (2018)
Projected traffic570 by 2039
Trucks9%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed98.8 mi (159 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 proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$2.3 million (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Rose Valley RD over Coweeman River built?

It was built in 1974, making it 51 years old in 2025.

What condition is Rose Valley RD over Coweeman 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 March 2023.

How much traffic does Rose Valley RD over Coweeman River carry?

About 420 vehicles per day (2018 count), of which roughly 9% are trucks.

How long is Rose Valley RD over Coweeman River?

The structure is 172 ft (52.4 m) long with a longest span of 78 ft (23.8 m) and a deck 39 ft wide.

Who owns Rose Valley RD over Coweeman River?

It is owned by the County Highway Agency.