US Bridges

Oatfield Road over Left Fork Creek

Good

Wahkiakum County, Washington · 0.1E Mid Val RD · Structure no. 083870000000000

Built
1979
46 years old
Condition
Good
inspected November 2024
Type
Slab
Concrete
Length
39 ft
1 main span
Daily traffic
51
2014 count
Owner
County
County Highway Agency

About this bridge

Oatfield Road over Left Fork Creek is a concrete slab carrying Oatfield Road over Left Fork Creek in Wahkiakum 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 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 10% of them trucks, projected to reach 92 by 2034. The structure is 39 ft (11.9 m) long and 28 ft wide. If it were closed, the detour would be 98.8 mi (159 km).

CarriesOatfield Road
CrossesLeft Fork Creek
Location0.1E Mid Val RD
RouteCounty Highway 12860
Coordinates46.32028, -123.45556
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 protection7 GoodSome minor problems.
Last inspectionNovember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating57.5 US tons
Inventory rating34.3 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, precast panels
Main spans1
Design loadHS 20
Structure length39 ft (11.9 m)
Longest span28 ft (8.4 m)
Deck width28 ft (8.5 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic51 (2014)
Projected traffic92 by 2034
Trucks10%
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$521,000 (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Oatfield Road over Left Fork Creek built?

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

What condition is Oatfield Road over Left Fork 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 Oatfield Road over Left Fork Creek carry?

About 51 vehicles per day (2014 count), of which roughly 10% are trucks.

How long is Oatfield Road over Left Fork Creek?

The structure is 39 ft (11.9 m) long with a longest span of 28 ft (8.4 m) and a deck 28 ft wide.

Who owns Oatfield Road over Left Fork Creek?

It is owned by the County Highway Agency.