US Bridges

US 12 over Dry Creek

Good

Walla Walla County, Washington · 16.1 E JCT US 730 Spur · Structure no. 0019406G0000000

Built
2023
2 years old
Condition
Good
inspected July 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
117 ft
1 main span
Daily traffic
3,740
2023 count
Owner
State
State Highway Agency

About this bridge

US 12 over Dry Creek is a prestressed concrete stringer/multi-beam or girder carrying US 12 over Dry Creek in Walla Walla County, Washington. It was built in 2023, so it is 2 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 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 3,740 vehicles a day, roughly 13% of them trucks, projected to reach 4,100 by 2039. The structure is 117 ft (35.8 m) long and 41 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesUS 12
CrossesDry Creek
Location16.1 E JCT US 730 Spur
RouteU.S. Route 12
CountyWalla Walla County
StateWashington
Coordinates46.06064, -118.58922
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
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating67.9 US tons
Inventory rating50.4 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHL 93
Structure length117 ft (35.8 m)
Longest span102 ft (31.2 m)
Deck width41 ft (12.5 m)
Roadway width38 ft (11.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,740 (2023)
Projected traffic4,100 by 2039
Trucks13%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
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 statusHistorical significance not determinable at this time
Work proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$2.2 million (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was US 12 over Dry Creek built?

It was built in 2023, making it 2 years old in 2025.

What condition is US 12 over Dry 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 July 2023.

How much traffic does US 12 over Dry Creek carry?

About 3,740 vehicles per day (2023 count), of which roughly 13% are trucks.

How long is US 12 over Dry Creek?

The structure is 117 ft (35.8 m) long with a longest span of 102 ft (31.2 m) and a deck 41 ft wide.

Who owns US 12 over Dry Creek?

It is owned by the State Highway Agency.