US Bridges

Wishkah Road over Monarch (wyman) Creek

Good

Grays Harbor County, Washington · 05.9 N Aberdeen · Structure no. 081933000000000

Built
1900
125 years old, rebuilt 1976
Condition
Good
inspected November 2024
Type
Arch - Deck
Concrete
Length
31 ft
1 main span
Daily traffic
1,498
2022 count
Owner
County
County Highway Agency

About this bridge

Wishkah Road over Monarch (wyman) Creek is a concrete arch - deck carrying Wishkah Road over Monarch (wyman) Creek in Grays Harbor County, Washington. It was built in 1900 and reconstructed in 1976, so it is 125 years old, older than the Washington average of 49.8 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 1,498 vehicles a day, roughly 36% of them trucks, projected to reach 1,827 by 2044. The structure is 31 ft (9.5 m) long and 33 ft wide. If it were closed, the detour would be 29.2 mi (47 km).

Location

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CarriesWishkah Road
CrossesMonarch (wyman) Creek
Location05.9 N Aberdeen
RouteCounty Highway 94311
CountyGrays Harbor County
StateWashington
Coordinates47.04426, -123.7929
Functional classRural Major Collector

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionNovember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation2: Basically intolerable, requiring high priority of replacement
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating17 US tons
Inventory rating10 US tons

Structure

Structure typeArch - Deck
MaterialConcrete
DeckConcrete, precast panels
Main spans1
Design loadUnknown
Structure length31 ft (9.5 m)
Longest span30 ft (9.2 m)
Deck width33 ft (10.1 m)
Roadway width30 ft (9.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,498 (2022)
Projected traffic1,827 by 2044
Trucks36%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed29.2 mi (47 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$1.5 million (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Wishkah Road over Monarch (wyman) Creek built?

It was built in 1900, making it 125 years old in 2025. It was reconstructed in 1976.

What condition is Wishkah Road over Monarch (wyman) Creek in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in November 2024.

How much traffic does Wishkah Road over Monarch (wyman) Creek carry?

About 1,498 vehicles per day (2022 count), of which roughly 36% are trucks.

How long is Wishkah Road over Monarch (wyman) Creek?

The structure is 31 ft (9.5 m) long with a longest span of 30 ft (9.2 m) and a deck 33 ft wide.

Who owns Wishkah Road over Monarch (wyman) Creek?

It is owned by the County Highway Agency.