US Bridges

US 12 over Railroad

Fair

Walla Walla County, Washington · 11.4 E JCT SR 124 · Structure no. 0011840A0000000

Built
1981
44 years old
Condition
Fair
inspected June 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete Continuous
Length
215 ft
3 main spans
Daily traffic
8,735
2023 count
Owner
State
State Highway Agency

About this bridge

US 12 over Railroad is a prestressed concrete continuous stringer/multi-beam or girder carrying US 12 over Railroad in Walla Walla County, Washington. It was built in 1981, so it is 44 years old, younger 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 8,735 vehicles a day, roughly 26% of them trucks, projected to reach 9,549 by 2039. The structure is 215 ft (65.5 m) long and 43 ft wide. If it were closed, the detour would be 29.2 mi (47 km).

Location

Open in Google Maps
CarriesUS 12
CrossesRailroad
Location11.4 E JCT SR 124
RouteU.S. Route 12
CountyWalla Walla County
StateWashington
Coordinates46.06983, -118.90803
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.
Last inspectionJune 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating37.5 US tons
Inventory rating28.9 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20 + Mod
Structure length215 ft (65.5 m)
Longest span75 ft (22.9 m)
Deck width43 ft (13.1 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic8,735 (2023)
Projected traffic9,549 by 2039
Trucks26%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesRailroad
Detour if closed29.2 mi (47 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$4.4 million (2022 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was US 12 over Railroad built?

It was built in 1981, making it 44 years old in 2025.

What condition is US 12 over Railroad 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 June 2023.

How much traffic does US 12 over Railroad carry?

About 8,735 vehicles per day (2023 count), of which roughly 26% are trucks.

How long is US 12 over Railroad?

The structure is 215 ft (65.5 m) long with a longest span of 75 ft (22.9 m) and a deck 43 ft wide.

Who owns US 12 over Railroad?

It is owned by the State Highway Agency.