US Bridges

Wynooche Valley RD over Anderson Creek

Fair

Grays Harbor County, Washington · 12.2 N JCT SR12 · Structure no. 083010000000000

Built
1965
60 years old
Condition
Fair
inspected December 2022
Type
Slab
Prestressed Concrete
Length
30 ft
1 main span
Daily traffic
226
2022 count
Owner
County
County Highway Agency

About this bridge

Wynooche Valley RD over Anderson Creek is a prestressed concrete slab carrying Wynooche Valley RD over Anderson Creek in Grays Harbor County, Washington. It was built in 1965, so it is 60 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 226 vehicles a day, roughly 15% of them trucks, projected to reach 276 by 2042. The structure is 30 ft (9.1 m) long and 27 ft wide. If it were closed, the detour would be 98.8 mi (159 km).

Location

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CarriesWynooche Valley RD
CrossesAnderson Creek
Location12.2 N JCT SR12
RouteCounty Highway 95190
CountyGrays Harbor County
StateWashington
Coordinates47.11639, -123.65667
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 protection7 GoodSome minor problems.
Last inspectionDecember 2022
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 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 typeSlab
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1
Design loadHS 15
Structure length30 ft (9.1 m)
Longest span30 ft (9.1 m)
Deck width27 ft (8.2 m)
Roadway width25 ft (7.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic226 (2022)
Projected traffic276 by 2042
Trucks15%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed98.8 mi (159 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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Wynooche Valley RD over Anderson Creek built?

It was built in 1965, making it 60 years old in 2025.

What condition is Wynooche Valley RD over Anderson 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 December 2022.

How much traffic does Wynooche Valley RD over Anderson Creek carry?

About 226 vehicles per day (2022 count), of which roughly 15% are trucks.

How long is Wynooche Valley RD over Anderson Creek?

The structure is 30 ft (9.1 m) long with a longest span of 30 ft (9.1 m) and a deck 27 ft wide.

Who owns Wynooche Valley RD over Anderson Creek?

It is owned by the County Highway Agency.