US Bridges

US 12 over RR & Private Road

Good

Walla Walla County, Washington · 8.7 E JCT SR 124 · Structure no. 0017082A0000000

Built
2007
18 years old
Condition
Good
inspected June 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete Continuous
Length
553 ft
3 main spans
Daily traffic
6,038
2023 count
Owner
State
State Highway Agency

About this bridge

US 12 over RR & Private Road is a prestressed concrete continuous stringer/multi-beam or girder carrying US 12 over RR & Private Road in Walla Walla County, Washington. It was built in 2007, so it is 18 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 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 6,038 vehicles a day, roughly 20% of them trucks, projected to reach 6,222 by 2039. The structure is 553 ft (168.6 m) long and 42 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesUS 12
CrossesRR & Private Road
Location8.7 E JCT SR 124
RouteU.S. Route 12
CountyWalla Walla County
StateWashington
Coordinates46.10642, -118.91544
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.
Superstructure8 Very GoodNo problems noted.
Substructure7 GoodSome minor problems.
Last inspectionJune 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating99 US tons
Inventory rating60 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHL 93
Structure length553 ft (168.6 m)
Longest span186 ft (56.7 m)
Deck width42 ft (12.8 m)
Roadway width38 ft (11.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic6,038 (2023)
Projected traffic6,222 by 2039
Trucks20%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway and railroad
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$10.5 million (2022 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was US 12 over RR & Private Road built?

It was built in 2007, making it 18 years old in 2025.

What condition is US 12 over RR & Private Road 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 2023.

How much traffic does US 12 over RR & Private Road carry?

About 6,038 vehicles per day (2023 count), of which roughly 20% are trucks.

How long is US 12 over RR & Private Road?

The structure is 553 ft (168.6 m) long with a longest span of 186 ft (56.7 m) and a deck 42 ft wide.

Who owns US 12 over RR & Private Road?

It is owned by the State Highway Agency.