US Bridges

US 12 over Touchet River

Good

Columbia County, Washington · 7.5 E Walla Wal CO · Structure no. 0007856B0000000

Built
1966
59 years old
Condition
Good
inspected June 2024
Type
Slab
Concrete Continuous
Length
164 ft
3 main spans
Daily traffic
5,627
2023 count
Owner
State
State Highway Agency

About this bridge

US 12 over Touchet River is a concrete continuous slab carrying US 12 over Touchet River in Columbia County, Washington. It was built in 1966, so it is 59 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 5,627 vehicles a day, roughly 20% of them trucks, projected to reach 6,456 by 2039. The structure is 164 ft (50 m) long and 56 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

CarriesUS 12
CrossesTouchet River
Location7.5 E Walla Wal CO
RouteU.S. Route 12
Coordinates46.31836, -117.98358
Functional classRural Principal Arterial - Other

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 inspectionJune 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation7: Better than present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating89 US tons
Inventory rating53 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length164 ft (50 m)
Longest span66 ft (20.1 m)
Deck width56 ft (17 m)
Roadway width48 ft (14.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5,627 (2023)
Projected traffic6,456 by 2039
Trucks20%
Lanes on structure3
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed1.9 mi (3 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$3.9 million (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was US 12 over Touchet River built?

It was built in 1966, making it 59 years old in 2025.

What condition is US 12 over Touchet River 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 June 2024.

How much traffic does US 12 over Touchet River carry?

About 5,627 vehicles per day (2023 count), of which roughly 20% are trucks.

How long is US 12 over Touchet River?

The structure is 164 ft (50 m) long with a longest span of 66 ft (20.1 m) and a deck 56 ft wide.

Who owns US 12 over Touchet River?

It is owned by the State Highway Agency.