US Bridges

US 101 over Bone River

Good

Pacific County, Washington · 16.3 N JCT SR 4 · Structure no. 0018292A0000000

Built
2013
12 years old
Condition
Good
inspected September 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete Continuous
Length
334 ft
3 main spans
Daily traffic
3,501
2023 count
Owner
State
State Highway Agency

About this bridge

US 101 over Bone River is a prestressed concrete continuous stringer/multi-beam or girder carrying US 101 over Bone River in Pacific County, Washington. It was built in 2013, so it is 12 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 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 3,501 vehicles a day, roughly 11% of them trucks, projected to reach 4,065 by 2039. The structure is 334 ft (101.8 m) long and 39 ft wide. If it were closed, the detour would be 18 mi (29 km).

Location

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CarriesUS 101
CrossesBone River
Location16.3 N JCT SR 4
RouteU.S. Route 101
CountyPacific County
StateWashington
Coordinates46.64916, -123.9186
Functional classRural Principal Arterial - Other

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable 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 alignment8: Equal to present desirable criteria
Operating rating65 US tons
Inventory rating49.3 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHL 93
Structure length334 ft (101.8 m)
Longest span140 ft (42.7 m)
Deck width39 ft (11.9 m)
Roadway width36 ft (11 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,501 (2023)
Projected traffic4,065 by 2039
Trucks11%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed18 mi (29 km)
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkNon-Interstate STRAHNET route

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$4.9 million (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was US 101 over Bone River built?

It was built in 2013, making it 12 years old in 2025.

What condition is US 101 over Bone 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 September 2023.

How much traffic does US 101 over Bone River carry?

About 3,501 vehicles per day (2023 count), of which roughly 11% are trucks.

How long is US 101 over Bone River?

The structure is 334 ft (101.8 m) long with a longest span of 140 ft (42.7 m) and a deck 39 ft wide.

Who owns US 101 over Bone River?

It is owned by the State Highway Agency.