US Bridges

Brim Creek Road over Stillwater Creek

Good

Lewis County, Washington · 2.0 W Vader · Structure no. 083319000000000

Built
1960
65 years old
Condition
Good
inspected December 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
97 ft
2 main spans
Daily traffic
95
2021 count
Owner
County
County Highway Agency

About this bridge

Brim Creek Road over Stillwater Creek is a prestressed concrete stringer/multi-beam or girder carrying Brim Creek Road over Stillwater Creek in Lewis County, Washington. It was built in 1960, so it is 65 years old, older 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 95 vehicles a day, roughly 17% of them trucks, projected to reach 167 by 2041. The structure is 97 ft (29.6 m) long and 26 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

CarriesBrim Creek Road
CrossesStillwater Creek
Location2.0 W Vader
RouteCounty Highway 35410
Coordinates46.41618, -122.99432
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.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionDecember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation7: Better than present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating60 US tons
Inventory rating32 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length97 ft (29.6 m)
Longest span55 ft (16.8 m)
Deck width26 ft (8 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic95 (2021)
Projected traffic167 by 2041
Trucks17%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.2 mi (10 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$1.5 million (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Brim Creek Road over Stillwater Creek built?

It was built in 1960, making it 65 years old in 2025.

What condition is Brim Creek Road over Stillwater 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 December 2023.

How much traffic does Brim Creek Road over Stillwater Creek carry?

About 95 vehicles per day (2021 count), of which roughly 17% are trucks.

How long is Brim Creek Road over Stillwater Creek?

The structure is 97 ft (29.6 m) long with a longest span of 55 ft (16.8 m) and a deck 26 ft wide.

Who owns Brim Creek Road over Stillwater Creek?

It is owned by the County Highway Agency.