US Bridges

US 101 over Big Creek

Fair

Grays Harbor County, Washington · 15.1 N JCT SR 109 · Structure no. 0003217A0000000

Built
1947
78 years old, rebuilt 1991
Condition
Fair
inspected June 2023
Type
Tee Beam
Concrete Continuous
Length
156 ft
3 main spans
Daily traffic
2,503
2023 count
Owner
State
State Highway Agency

About this bridge

US 101 over Big Creek is a concrete continuous tee beam carrying US 101 over Big Creek in Grays Harbor County, Washington. It was built in 1947 and reconstructed in 1991, so it is 78 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 2,503 vehicles a day, roughly 14% of them trucks, projected to reach 2,710 by 2039. The structure is 156 ft (47.5 m) long and 39 ft wide. If it were closed, the detour would be 31.7 mi (51 km).

Location

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CarriesUS 101
CrossesBig Creek
Location15.1 N JCT SR 109
RouteU.S. Route 101
CountyGrays Harbor County
StateWashington
Coordinates47.16836, -123.88436
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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionJune 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 adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating44 US tons
Inventory rating34 US tons

Structure

Structure typeTee Beam
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length156 ft (47.5 m)
Longest span65 ft (19.8 m)
Deck width39 ft (11.9 m)
Roadway width36 ft (11 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,503 (2023)
Projected traffic2,710 by 2039
Trucks14%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed31.7 mi (51 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$3 million (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was US 101 over Big Creek built?

It was built in 1947, making it 78 years old in 2025. It was reconstructed in 1991.

What condition is US 101 over Big Creek 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 June 2023.

How much traffic does US 101 over Big Creek carry?

About 2,503 vehicles per day (2023 count), of which roughly 14% are trucks.

How long is US 101 over Big Creek?

The structure is 156 ft (47.5 m) long with a longest span of 65 ft (19.8 m) and a deck 39 ft wide.

Who owns US 101 over Big Creek?

It is owned by the State Highway Agency.