US Bridges

North Fork Rd. over S. Fork Newaukum River

Fair

Lewis County, Washington · 0.34 NE 94000 · Structure no. 082469000000000

Built
1958
67 years old
Condition
Fair
inspected February 2024
Type
Tee Beam
Concrete Continuous
Length
205 ft
3 main spans
Daily traffic
1,493
2021 count
Owner
County
County Highway Agency

About this bridge

North Fork Rd. over S. Fork Newaukum River is a concrete continuous tee beam carrying North Fork Rd. over S. Fork Newaukum River in Lewis County, Washington. It was built in 1958, so it is 67 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 1,493 vehicles a day, roughly 20% of them trucks, projected to reach 2,697 by 2041. The structure is 205 ft (62.6 m) long and 26 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

CarriesNorth Fork Rd.
CrossesS. Fork Newaukum River
Location0.34 NE 94000
RouteCounty Highway 46000
Coordinates46.60326, -122.85522
Functional classRural Minor 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.
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
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating36 US tons
Inventory rating20.9 US tons

Structure

Structure typeTee Beam
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 15
Structure length205 ft (62.6 m)
Longest span84 ft (25.6 m)
Deck width26 ft (7.9 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,493 (2021)
Projected traffic2,697 by 2041
Trucks20%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 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$2.5 million (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was North Fork Rd. over S. Fork Newaukum River built?

It was built in 1958, making it 67 years old in 2025.

What condition is North Fork Rd. over S. Fork Newaukum 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 February 2024.

How much traffic does North Fork Rd. over S. Fork Newaukum River carry?

About 1,493 vehicles per day (2021 count), of which roughly 20% are trucks.

How long is North Fork Rd. over S. Fork Newaukum River?

The structure is 205 ft (62.6 m) long with a longest span of 84 ft (25.6 m) and a deck 26 ft wide.

Who owns North Fork Rd. over S. Fork Newaukum River?

It is owned by the County Highway Agency.