US Bridges

North Fork RD over N.Fork Newaukum River

Fair

Lewis County, Washington · 4.5 NE Forest · Structure no. 080059000000000

Built
1980
45 years old
Condition
Fair
inspected January 2023
Type
Slab
Concrete Continuous
Length
145 ft
3 main spans
Daily traffic
441
2019 count
Owner
County
County Highway Agency

About this bridge

North Fork RD over N.Fork Newaukum River is a concrete continuous slab carrying North Fork RD over N.Fork Newaukum River in Lewis County, Washington. It was built in 1980, so it is 45 years old, younger 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 5 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 441 vehicles a day, roughly 17% of them trucks, projected to reach 821 by 2040. The structure is 145 ft (44.2 m) long and 33 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesNorth Fork RD
CrossesN.Fork Newaukum River
Location4.5 NE Forest
RouteCounty Highway 46000
CountyLewis County
StateWashington
Coordinates46.63674, -122.78225
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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionJanuary 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourCountermeasures installed to correct a previously existing problem
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating66 US tons
Inventory rating40 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length145 ft (44.2 m)
Longest span68 ft (20.7 m)
Deck width33 ft (10.1 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic441 (2019)
Projected traffic821 by 2040
Trucks17%
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$2.2 million (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

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

It was built in 1980, making it 45 years old in 2025.

What condition is North Fork RD over N.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 January 2023.

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

About 441 vehicles per day (2019 count), of which roughly 17% are trucks.

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

The structure is 145 ft (44.2 m) long with a longest span of 68 ft (20.7 m) and a deck 33 ft wide.

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

It is owned by the County Highway Agency.