US Bridges

North Fork RD over N.Fk. Newaukum River

Good

Lewis County, Washington · 2.05 NE JCT 94001 · Structure no. 084801000000000

Built
1962
63 years old
Condition
Good
inspected January 2024
Type
Tee Beam
Concrete Continuous
Length
161 ft
3 main spans
Daily traffic
274
2021 count
Owner
County
County Highway Agency

About this bridge

North Fork RD over N.Fk. Newaukum River is a concrete continuous tee beam carrying North Fork RD over N.Fk. Newaukum River in Lewis County, Washington. It was built in 1962, so it is 63 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 274 vehicles a day, roughly 26% of them trucks, projected to reach 495 by 2041. The structure is 161 ft (49.1 m) long and 26 ft wide. If it were closed, the detour would be 98.8 mi (159 km).

CarriesNorth Fork RD
CrossesN.Fk. Newaukum River
Location2.05 NE JCT 94001
RouteCounty Highway 46000
Coordinates46.65435, -122.78053
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 inspectionJanuary 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating46 US tons
Inventory rating27 US tons

Structure

Structure typeTee Beam
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 15
Structure length161 ft (49.1 m)
Longest span68 ft (20.7 m)
Deck width26 ft (7.9 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic274 (2021)
Projected traffic495 by 2041
Trucks26%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
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 proposedOther structural work, including hydraulic replacements
Estimated improvement cost$2 million (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was North Fork RD over N.Fk. Newaukum River built?

It was built in 1962, making it 63 years old in 2025.

What condition is North Fork RD over N.Fk. Newaukum River 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 January 2024.

How much traffic does North Fork RD over N.Fk. Newaukum River carry?

About 274 vehicles per day (2021 count), of which roughly 26% are trucks.

How long is North Fork RD over N.Fk. Newaukum River?

The structure is 161 ft (49.1 m) long with a longest span of 68 ft (20.7 m) and a deck 26 ft wide.

Who owns North Fork RD over N.Fk. Newaukum River?

It is owned by the County Highway Agency.