US Bridges

Stowell Road over Mill Creek

Good

Lewis County, Washington · 0.5 N Salkum · Structure no. 081376000000000

Built
1955
70 years old, rebuilt 2005
Condition
Good
inspected February 2024
Type
Stringer/Multi-beam or Girder
Concrete
Length
31 ft
1 main span
Daily traffic
325
2021 count
Owner
County
County Highway Agency

About this bridge

Stowell Road over Mill Creek is a concrete stringer/multi-beam or girder carrying Stowell Road over Mill Creek in Lewis County, Washington. It was built in 1955 and reconstructed in 2005, so it is 70 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 325 vehicles a day, roughly 24% of them trucks, projected to reach 587 by 2041. The structure is 31 ft (9.5 m) long and 34 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

CarriesStowell Road
CrossesMill Creek
Location0.5 N Salkum
RouteCounty Highway 64000
Coordinates46.53974, -122.62605
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 inspectionFebruary 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourCountermeasures installed to correct a previously existing problem
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 rating58 US tons
Inventory rating34.9 US tons

Structure

MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadUnknown
Structure length31 ft (9.5 m)
Longest span31 ft (9.4 m)
Deck width34 ft (10.5 m)
Roadway width31 ft (9.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic325 (2021)
Projected traffic587 by 2041
Trucks24%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 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$476,000 (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Stowell Road over Mill Creek built?

It was built in 1955, making it 70 years old in 2025. It was reconstructed in 2005.

What condition is Stowell Road over Mill 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 February 2024.

How much traffic does Stowell Road over Mill Creek carry?

About 325 vehicles per day (2021 count), of which roughly 24% are trucks.

How long is Stowell Road over Mill Creek?

The structure is 31 ft (9.5 m) long with a longest span of 31 ft (9.4 m) and a deck 34 ft wide.

Who owns Stowell Road over Mill Creek?

It is owned by the County Highway Agency.