US Bridges

North Fork RD over N. Fk Newaukum River

Fair

Lewis County, Washington · 6.5 NE Forest · Structure no. 083564000000000

Built
1963
62 years old
Condition
Fair
inspected January 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
170 ft
1 main span
Daily traffic
212
2021 count
Owner
County
County Highway Agency

About this bridge

North Fork RD over N. Fk Newaukum River is a prestressed concrete stringer/multi-beam or girder carrying North Fork RD over N. Fk Newaukum River in Lewis County, Washington. It was built in 1963, so it is 62 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 212 vehicles a day, roughly 34% of them trucks, projected to reach 383 by 2041. The structure is 170 ft (51.7 m) long and 26 ft wide. If it were closed, the detour would be 98.8 mi (159 km).

Location

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CarriesNorth Fork RD
CrossesN. Fk Newaukum River
Location6.5 NE Forest
RouteCounty Highway 46000
CountyLewis County
StateWashington
Coordinates46.66718, -122.7701
Functional classRural Local

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 inspectionJanuary 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourUnknown foundation; not evaluated for scour
Structural evaluation7: Better than present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating58 US tons
Inventory rating34 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1 (+3 approach)
Design loadHS 15
Structure length170 ft (51.7 m)
Longest span100 ft (30.5 m)
Deck width26 ft (8 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic212 (2021)
Projected traffic383 by 2041
Trucks34%
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$2.3 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 1963, making it 62 years old in 2025.

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

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

About 212 vehicles per day (2021 count), of which roughly 34% are trucks.

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

The structure is 170 ft (51.7 m) long with a longest span of 100 ft (30.5 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.