US Bridges

West Valley Road over Eggman Creek

Good

Wahkiakum County, Washington · 0.1 W JCT SR 4 · Structure no. 080406000000000

Built
1973
52 years old
Condition
Good
inspected November 2024
Type
Slab
Prestressed Concrete
Length
52 ft
2 main spans
Daily traffic
53
2014 count
Owner
County
County Highway Agency

About this bridge

West Valley Road over Eggman Creek is a prestressed concrete slab carrying West Valley Road over Eggman Creek in Wahkiakum County, Washington. It was built in 1973, so it is 52 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 53 vehicles a day, roughly 15% of them trucks, projected to reach 96 by 2034. The structure is 52 ft (15.8 m) long and 28 ft wide. If it were closed, the detour would be 98.8 mi (159 km).

CarriesWest Valley Road
CrossesEggman Creek
Location0.1 W JCT SR 4
RouteCounty Highway 12580
Coordinates46.29833, -123.47083
Functional classRural Local

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 protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionNovember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating37.1 US tons
Inventory rating22.5 US tons

Structure

Structure typeSlab
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans2
Design loadHS 20
Structure length52 ft (15.8 m)
Longest span26 ft (7.9 m)
Deck width28 ft (8.6 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic53 (2014)
Projected traffic96 by 2034
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 proposedOther structural work, including hydraulic replacements
Estimated improvement cost$667,000 (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was West Valley Road over Eggman Creek built?

It was built in 1973, making it 52 years old in 2025.

What condition is West Valley Road over Eggman 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 West Valley Road over Eggman Creek carry?

About 53 vehicles per day (2014 count), of which roughly 15% are trucks.

How long is West Valley Road over Eggman Creek?

The structure is 52 ft (15.8 m) long with a longest span of 26 ft (7.9 m) and a deck 28 ft wide.

Who owns West Valley Road over Eggman Creek?

It is owned by the County Highway Agency.