US Bridges

Camp One Road over Willapa River North Fork

Good

Pacific County, Washington · 5.0 SE JCT 6 & 101 · Structure no. 084233000000000

Built
1991
34 years old
Condition
Good
inspected June 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete Continuous
Length
240 ft
4 main spans
Daily traffic
332
2023 count
Owner
County
County Highway Agency

About this bridge

Camp One Road over Willapa River North Fork is a prestressed concrete continuous stringer/multi-beam or girder carrying Camp One Road over Willapa River North Fork in Pacific County, Washington. It was built in 1991, so it is 34 years old, younger 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 332 vehicles a day, roughly 30% of them trucks, projected to reach 700 by 2043. The structure is 240 ft (73.2 m) long and 28 ft wide. If it were closed, the detour would be 5 mi (8 km).

CarriesCamp One Road
CrossesWillapa River North Fork
Location5.0 SE JCT 6 & 101
RouteCounty Highway 96190
Coordinates46.65017, -123.65361
Functional classRural Minor Collector

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 protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJune 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating39 US tons
Inventory rating30 US tons

Structure

MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length240 ft (73.2 m)
Longest span75 ft (22.9 m)
Deck width28 ft (8.5 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic332 (2023)
Projected traffic700 by 2043
Trucks30%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed5 mi (8 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$3.9 million (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Camp One Road over Willapa River North Fork built?

It was built in 1991, making it 34 years old in 2025.

What condition is Camp One Road over Willapa River North Fork 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 June 2024.

How much traffic does Camp One Road over Willapa River North Fork carry?

About 332 vehicles per day (2023 count), of which roughly 30% are trucks.

How long is Camp One Road over Willapa River North Fork?

The structure is 240 ft (73.2 m) long with a longest span of 75 ft (22.9 m) and a deck 28 ft wide.

Who owns Camp One Road over Willapa River North Fork?

It is owned by the County Highway Agency.