US Bridges

US 101 over Elkhorn CR

Fair

Pacific County, Washington · 5.7 N JCT SR 105 · Structure no. 0001331B0000000

Built
1929
96 years old
Condition
Fair
inspected May 2023
Type
Tee Beam
Concrete
Length
98 ft
3 main spans
Daily traffic
4,478
2023 count
Owner
State
State Highway Agency

About this bridge

US 101 over Elkhorn CR is a concrete tee beam carrying US 101 over Elkhorn CR in Pacific County, Washington. It was built in 1929, so it is 96 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 4,478 vehicles a day, roughly 10% of them trucks, projected to reach 5,937 by 2039. The structure is 98 ft (29.9 m) long and 27 ft wide. If it were closed, the detour would be 37.9 mi (61 km).

Location

Open in Google Maps
CarriesUS 101
CrossesElkhorn CR
Location5.7 N JCT SR 105
RouteU.S. Route 101
CountyPacific County
StateWashington
Coordinates46.76869, -123.7487
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
Deck7 GoodSome minor problems.
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 protection7 GoodSome minor problems.
Last inspectionMay 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
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 rating37.8 US tons
Inventory rating28.9 US tons

Structure

Structure typeTee Beam
MaterialConcrete
DeckConcrete, cast-in-place
Main spans3
Design loadH 20
Structure length98 ft (29.9 m)
Longest span46 ft (14 m)
Deck width27 ft (8.2 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,478 (2023)
Projected traffic5,937 by 2039
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed37.9 mi (61 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 statusNot eligible for the National Register of Historic Places
Work proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$1.9 million (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was US 101 over Elkhorn CR built?

It was built in 1929, making it 96 years old in 2025.

What condition is US 101 over Elkhorn CR 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 May 2023.

How much traffic does US 101 over Elkhorn CR carry?

About 4,478 vehicles per day (2023 count), of which roughly 10% are trucks.

How long is US 101 over Elkhorn CR?

The structure is 98 ft (29.9 m) long with a longest span of 46 ft (14 m) and a deck 27 ft wide.

Who owns US 101 over Elkhorn CR?

It is owned by the State Highway Agency.