US Bridges

North Shore Road over Quinault River

Fair

Jefferson County, Washington · 12.7 Mi. NE of Jct. Hwy. · Structure no. 9500023P0000000

Built
1974
51 years old
Condition
Fair
inspected August 2023
Type
Box Beam or Girders - Single or Spread
Prestressed Concrete Continuous
Length
328 ft
2 main spans
Daily traffic
200
2011 count
Owner
Federal
National Park Service

About this bridge

North Shore Road over Quinault River is a prestressed concrete continuous box beam or girders - single or spread carrying North Shore Road over Quinault River in Jefferson County, Washington. It was built in 1974, so it is 51 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 200 vehicles a day, roughly 2% of them trucks, projected to reach 400 by 2031. The structure is 328 ft (100 m) long and 30 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesNorth Shore Road
CrossesQuinault River
Location12.7 Mi. NE of Jct. Hwy.
RouteFederal Lands Road 105
CountyJefferson County
StateWashington
Coordinates47.53322, -123.67831
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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionAugust 2023
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 geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating97 US tons
Inventory rating44 US tons

Structure

Structure typeBox Beam or Girders - Single or Spread
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 15
Structure length328 ft (100 m)
Longest span164 ft (50 m)
Deck width30 ft (9.1 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic200 (2011)
Projected traffic400 by 2031
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerNational Park Service
Maintained byNational Park Service
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost$285,000
NavigationNo navigation control on waterway

Frequently asked questions

When was North Shore Road over Quinault River built?

It was built in 1974, making it 51 years old in 2025.

What condition is North Shore Road over Quinault 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 August 2023.

How much traffic does North Shore Road over Quinault River carry?

About 200 vehicles per day (2011 count), of which roughly 2% are trucks.

How long is North Shore Road over Quinault River?

The structure is 328 ft (100 m) long with a longest span of 164 ft (50 m) and a deck 30 ft wide.

Who owns North Shore Road over Quinault River?

It is owned by the National Park Service.