US Bridges

Jackson HWY over Laussier Cr.

Fair

Lewis County, Washington · 4.36 S JCT US 12 · Structure no. 084524000000000

Built
1926
99 years old
Condition
Fair
inspected February 2023
Type
Culvert
Concrete
Length
33 ft
1 main span
Daily traffic
932
2018 count
Owner
County
County Highway Agency

About this bridge

Jackson HWY over Laussier Cr. is a concrete culvert carrying Jackson HWY over Laussier Cr. in Lewis County, Washington. It was built in 1926, so it is 99 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 932 vehicles a day, roughly 17% of them trucks, projected to reach 1,684 by 2038. The structure is 33 ft (10.1 m) long and 34 ft wide. If it were closed, the detour would be 8.1 mi (13 km).

Location

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CarriesJackson HWY
CrossesLaussier Cr.
Location4.36 S JCT US 12
RouteCounty Highway 95002
CountyLewis County
StateWashington
Coordinates46.48508, -122.81529
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
Channel and channel protection8 Very GoodNo problems noted.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionFebruary 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating20 US tons
Inventory rating15 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans1
Design loadUnknown
Structure length33 ft (10.1 m)
Longest span25 ft (7.6 m)
Deck width34 ft (10.4 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic932 (2018)
Projected traffic1,684 by 2038
Trucks17%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed8.1 mi (13 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedReplacement because of relocation of road
Estimated improvement cost$1.6 million (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Jackson HWY over Laussier Cr. built?

It was built in 1926, making it 99 years old in 2025.

What condition is Jackson HWY over Laussier Cr. 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 February 2023.

How much traffic does Jackson HWY over Laussier Cr. carry?

About 932 vehicles per day (2018 count), of which roughly 17% are trucks.

How long is Jackson HWY over Laussier Cr.?

The structure is 33 ft (10.1 m) long with a longest span of 25 ft (7.6 m) and a deck 34 ft wide.

Who owns Jackson HWY over Laussier Cr.?

It is owned by the County Highway Agency.