US Bridges

US 101 over Swanson Creek

Good

Clallam County, Washington · 4.0 N JCT SR 110 · Structure no. 0018857A0000000

Built
2016
9 years old
Condition
Good
inspected November 2024
Type
Culvert
Concrete
Length
26 ft
1 main span
Daily traffic
3,805
2023 count
Owner
State
State Highway Agency

About this bridge

US 101 over Swanson Creek is a concrete culvert carrying US 101 over Swanson Creek in Clallam County, Washington. It was built in 2016, so it is 9 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 3,805 vehicles a day, roughly 10% of them trucks, projected to reach 5,031 by 2039. The structure is 26 ft (7.9 m) long. If it were closed, the detour would be 98.8 mi (159 km).

CarriesUS 101
CrossesSwanson Creek
Location4.0 N JCT SR 110
RouteU.S. Route 101
Coordinates48.02189, -124.39053
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
Channel and channel protection8 Very GoodNo problems noted.
Culvert8 Very GoodNo problems noted.
Last inspectionNovember 2024
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating106.8 US tons
Inventory rating106.8 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans1
Design loadHL 93
Structure length26 ft (7.9 m)
Longest span25 ft (7.6 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,805 (2023)
Projected traffic5,031 by 2039
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed98.8 mi (159 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$1.3 million (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was US 101 over Swanson Creek built?

It was built in 2016, making it 9 years old in 2025.

What condition is US 101 over Swanson Creek 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 November 2024.

How much traffic does US 101 over Swanson Creek carry?

About 3,805 vehicles per day (2023 count), of which roughly 10% are trucks.

How long is US 101 over Swanson Creek?

The structure is 26 ft (7.9 m) long with a longest span of 25 ft (7.6 m).

Who owns US 101 over Swanson Creek?

It is owned by the State Highway Agency.