US Bridges

US 12 over Dry Creek

Fair

Walla Walla County, Washington · 11.5 E JCT SR 125 Spur · Structure no. 0004598A0000000

Built
1954
71 years old
Condition
Fair
inspected March 2024
Type
Tee Beam
Concrete
Length
54 ft
1 main span
Daily traffic
4,564
2023 count
Owner
State
State Highway Agency

About this bridge

US 12 over Dry Creek is a concrete tee beam carrying US 12 over Dry Creek in Walla Walla County, Washington. It was built in 1954, so it is 71 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 4,564 vehicles a day, roughly 13% of them trucks, projected to reach 5,480 by 2039. The structure is 54 ft (16.5 m) long and 40 ft wide. If it were closed, the detour would be 14.9 mi (24 km).

Location

Open in Google Maps
CarriesUS 12
CrossesDry Creek
Location11.5 E JCT SR 125 Spur
RouteU.S. Route 12
CountyWalla Walla County
StateWashington
Coordinates46.13667, -118.16689
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMarch 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 rating59 US tons
Inventory rating34.9 US tons

Structure

Structure typeTee Beam
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length54 ft (16.5 m)
Longest span52 ft (15.8 m)
Deck width40 ft (12.3 m)
Roadway width36 ft (11 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,564 (2023)
Projected traffic5,480 by 2039
Trucks13%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed14.9 mi (24 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 million (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was US 12 over Dry Creek built?

It was built in 1954, making it 71 years old in 2025.

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 March 2024.

How much traffic does US 12 over Dry Creek carry?

About 4,564 vehicles per day (2023 count), of which roughly 13% are trucks.

How long is US 12 over Dry Creek?

The structure is 54 ft (16.5 m) long with a longest span of 52 ft (15.8 m) and a deck 40 ft wide.

Who owns US 12 over Dry Creek?

It is owned by the State Highway Agency.