US Bridges

Peterson Road over Skamokawa Creek

Good

Wahkiakum County, Washington · 0.2 E Mid. Val. Rd. · Structure no. 087187000000000

Built
2003
22 years old
Condition
Good
inspected November 2024
Type
Tee Beam
Prestressed Concrete
Length
90 ft
1 main span
Daily traffic
51
2014 count
Owner
County
County Highway Agency

About this bridge

Peterson Road over Skamokawa Creek is a prestressed concrete tee beam carrying Peterson Road over Skamokawa Creek in Wahkiakum County, Washington. It was built in 2003, so it is 22 years old, younger 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 51 vehicles a day, roughly 1% of them trucks, projected to reach 92 by 2034. The structure is 90 ft (27.4 m) long and 26 ft wide. If it were closed, the detour would be 98.8 mi (159 km).

CarriesPeterson Road
CrossesSkamokawa Creek
Location0.2 E Mid. Val. Rd.
RouteCounty Highway 12800
Coordinates46.31472, -123.45306
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.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
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 evaluation8: Equal to present desirable criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating75.4 US tons
Inventory rating44.6 US tons

Structure

Structure typeTee Beam
MaterialPrestressed Concrete
DeckOther
Main spans1
Design loadHS 25 or greater
Structure length90 ft (27.4 m)
Longest span85 ft (25.9 m)
Deck width26 ft (7.9 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic51 (2014)
Projected traffic92 by 2034
Trucks1%
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$1.1 million (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Peterson Road over Skamokawa Creek built?

It was built in 2003, making it 22 years old in 2025.

What condition is Peterson Road over Skamokawa 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 Peterson Road over Skamokawa Creek carry?

About 51 vehicles per day (2014 count), of which roughly 1% are trucks.

How long is Peterson Road over Skamokawa Creek?

The structure is 90 ft (27.4 m) long with a longest span of 85 ft (25.9 m) and a deck 26 ft wide.

Who owns Peterson Road over Skamokawa Creek?

It is owned by the County Highway Agency.