US Bridges

US 12 over Dry Creek

Fair

Walla Walla County, Washington · 12.1 E JCT SR 125 Spur · Structure no. 0008527A0000000

Built
1920
105 years old, rebuilt 1969
Condition
Fair
inspected May 2023
Type
Arch - Deck
Concrete
Length
97 ft
1 main span
Daily traffic
4,314
2023 count
Owner
State
State Highway Agency

About this bridge

US 12 over Dry Creek is a concrete arch - deck carrying US 12 over Dry Creek in Walla Walla County, Washington. It was built in 1920 and reconstructed in 1969, so it is 105 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 4,314 vehicles a day, roughly 13% of them trucks, projected to reach 5,197 by 2039. The structure is 97 ft (29.6 m) long and 36 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesUS 12
CrossesDry Creek
Location12.1 E JCT SR 125 Spur
RouteU.S. Route 12
CountyWalla Walla County
StateWashington
Coordinates46.14038, -118.15469
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
Deck7 GoodSome minor problems.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionMay 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating25 US tons
Inventory rating19 US tons

Structure

Structure typeArch - Deck
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1 (+2 approach)
Design loadUnknown
Structure length97 ft (29.6 m)
Longest span50 ft (15.2 m)
Deck width36 ft (10.9 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,314 (2023)
Projected traffic5,197 by 2039
Trucks13%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed1.2 mi (2 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$1.8 million (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was US 12 over Dry Creek built?

It was built in 1920, making it 105 years old in 2025. It was reconstructed in 1969.

What condition is US 12 over Dry 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 May 2023.

How much traffic does US 12 over Dry Creek carry?

About 4,314 vehicles per day (2023 count), of which roughly 13% are trucks.

How long is US 12 over Dry Creek?

The structure is 97 ft (29.6 m) long with a longest span of 50 ft (15.2 m) and a deck 36 ft wide.

Who owns US 12 over Dry Creek?

It is owned by the State Highway Agency.