US Bridges

US 101 over Calawah River

Fair

Clallam County, Washington · 7.8 N Jefferson CO · Structure no. 0002396A0000000

Built
1938
87 years old
Condition
Fair
inspected March 2023
Type
Truss - Thru
Steel
Length
264 ft
1 main span
Daily traffic
5,775
2023 count
Owner
State
State Highway Agency

About this bridge

US 101 over Calawah River is a steel truss - thru carrying US 101 over Calawah River in Clallam County, Washington. It was built in 1938, so it is 87 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 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 5,775 vehicles a day, roughly 8% of them trucks, projected to reach 6,654 by 2039. The structure is 264 ft (80.5 m) long and 26 ft wide. If it were closed, the detour would be 98.8 mi (159 km).

Location

Open in Google Maps
CarriesUS 101
CrossesCalawah River
Location7.8 N Jefferson CO
RouteU.S. Route 101
CountyClallam County
StateWashington
Coordinates47.95961, -124.39275
Functional classRural Principal Arterial - Other

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.
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 inspectionMarch 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating42 US tons
Inventory rating25 US tons

Structure

Structure typeTruss - Thru
MaterialSteel
DeckConcrete, precast panels
Main spans1 (+2 approach)
Design loadH 15
Structure length264 ft (80.5 m)
Longest span170 ft (51.8 m)
Deck width26 ft (7.9 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deck15 ft (4.5 m)

Traffic and service

Average daily traffic5,775 (2023)
Projected traffic6,654 by 2039
Trucks8%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
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 statusNot eligible for the National Register of Historic Places
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 Calawah River built?

It was built in 1938, making it 87 years old in 2025.

What condition is US 101 over Calawah 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 March 2023.

How much traffic does US 101 over Calawah River carry?

About 5,775 vehicles per day (2023 count), of which roughly 8% are trucks.

How long is US 101 over Calawah River?

The structure is 264 ft (80.5 m) long with a longest span of 170 ft (51.8 m) and a deck 26 ft wide.

Who owns US 101 over Calawah River?

It is owned by the State Highway Agency.