US Bridges

US 101 over Cook Creek

Fair

Grays Harbor County, Washington · 32.9 N JCT SR 109 · Structure no. 0002031C0000000

Built
1936
89 years old
Condition
Fair
inspected June 2024
Type
Stringer/Multi-beam or Girder
Wood or Timber
Length
47 ft
3 main spans
Daily traffic
1,999
2023 count
Owner
State
State Highway Agency

About this bridge

US 101 over Cook Creek is a wood or timber stringer/multi-beam or girder carrying US 101 over Cook Creek in Grays Harbor County, Washington. It was built in 1936, so it is 89 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 1,999 vehicles a day, roughly 15% of them trucks, projected to reach 2,370 by 2039. The structure is 47 ft (14.3 m) long and 29 ft wide. If it were closed, the detour would be 11.8 mi (19 km).

CarriesUS 101
CrossesCook Creek
Location32.9 N JCT SR 109
RouteU.S. Route 101
Coordinates47.3765, -123.89914
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.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJune 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be 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 rating29 US tons

Structure

MaterialWood or Timber
DeckWood or timber
Main spans3
Design loadH 15
Structure length47 ft (14.3 m)
Longest span15 ft (4.6 m)
Deck width29 ft (8.7 m)
Roadway width27 ft (8.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,999 (2023)
Projected traffic2,370 by 2039
Trucks15%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed11.8 mi (19 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$670,000 (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was US 101 over Cook Creek built?

It was built in 1936, making it 89 years old in 2025.

What condition is US 101 over Cook 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 2024.

How much traffic does US 101 over Cook Creek carry?

About 1,999 vehicles per day (2023 count), of which roughly 15% are trucks.

How long is US 101 over Cook Creek?

The structure is 47 ft (14.3 m) long with a longest span of 15 ft (4.6 m) and a deck 29 ft wide.

Who owns US 101 over Cook Creek?

It is owned by the State Highway Agency.