US Bridges

US 12 over Oliver Creek

Fair

Lewis County, Washington · 15.3 E JCT SR 7 · Structure no. 0000961B0000000

Built
1926
99 years old, rebuilt 1952
Condition
Fair
inspected October 2023
Type
Culvert
Concrete
Length
22 ft
1 main span
Daily traffic
4,795
2023 count
Owner
State
State Highway Agency

About this bridge

US 12 over Oliver Creek is a concrete culvert carrying US 12 over Oliver Creek in Lewis County, Washington. It was built in 1926 and reconstructed in 1952, so it is 99 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 6 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 4,795 vehicles a day, roughly 21% of them trucks, projected to reach 5,704 by 2039. The structure is 22 ft (6.7 m) long. If it were closed, the detour would be 98.8 mi (159 km).

Location

Open in Google Maps
CarriesUS 12
CrossesOliver Creek
Location15.3 E JCT SR 7
RouteU.S. Route 12
CountyLewis County
StateWashington
Coordinates46.53711, -121.99892
Functional classRural Principal Arterial - Other

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Channel and channel protection7 GoodSome minor problems.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionOctober 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating99 US tons
Inventory rating74 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans1
Design loadUnknown
Structure length22 ft (6.7 m)
Longest span22 ft (6.7 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,795 (2023)
Projected traffic5,704 by 2039
Trucks21%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed98.8 mi (159 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$439,000 (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was US 12 over Oliver Creek built?

It was built in 1926, making it 99 years old in 2025. It was reconstructed in 1952.

What condition is US 12 over Oliver 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 October 2023.

How much traffic does US 12 over Oliver Creek carry?

About 4,795 vehicles per day (2023 count), of which roughly 21% are trucks.

How long is US 12 over Oliver Creek?

The structure is 22 ft (6.7 m) long with a longest span of 22 ft (6.7 m).

Who owns US 12 over Oliver Creek?

It is owned by the State Highway Agency.