US Bridges

Wynooche Wishkah over East Fork Wishkah River

Fair

Grays Harbor County, Washington · 04.1 W JCT 9519 · Structure no. 084898000000000

Built
1979
46 years old
Condition
Fair
inspected November 2024
Type
Slab
Prestressed Concrete
Length
125 ft
4 main spans
Daily traffic
682
2020 count
Owner
County
County Highway Agency

About this bridge

Wynooche Wishkah over East Fork Wishkah River is a prestressed concrete slab carrying Wynooche Wishkah over East Fork Wishkah River in Grays Harbor County, Washington. It was built in 1979, so it is 46 years old, younger 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 682 vehicles a day, roughly 10% of them trucks, projected to reach 832 by 2044. The structure is 125 ft (38.1 m) long and 28 ft wide. If it were closed, the detour would be 34.8 mi (56 km).

Location

Open in Google Maps
CarriesWynooche Wishkah
CrossesEast Fork Wishkah River
Location04.1 W JCT 9519
RouteCounty Highway 51800
CountyGrays Harbor County
StateWashington
Coordinates47.08147, -123.75481
Functional classRural Major Collector

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.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionNovember 2024
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 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 rating66 US tons
Inventory rating40 US tons

Structure

Structure typeSlab
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans4
Design loadHS 15
Structure length125 ft (38.1 m)
Longest span31 ft (9.5 m)
Deck width28 ft (8.5 m)
Roadway width26 ft (8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic682 (2020)
Projected traffic832 by 2044
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed34.8 mi (56 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$4.9 million (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Wynooche Wishkah over East Fork Wishkah River built?

It was built in 1979, making it 46 years old in 2025.

What condition is Wynooche Wishkah over East Fork Wishkah 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 November 2024.

How much traffic does Wynooche Wishkah over East Fork Wishkah River carry?

About 682 vehicles per day (2020 count), of which roughly 10% are trucks.

How long is Wynooche Wishkah over East Fork Wishkah River?

The structure is 125 ft (38.1 m) long with a longest span of 31 ft (9.5 m) and a deck 28 ft wide.

Who owns Wynooche Wishkah over East Fork Wishkah River?

It is owned by the County Highway Agency.