US Bridges

US 12 over Airport RD

Fair

Walla Walla County, Washington · 4.5 E JCT SR 125 Spur · Structure no. 0008855C0000000

Built
1971
54 years old
Condition
Fair
inspected March 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete Continuous
Length
164 ft
3 main spans
Daily traffic
2,430
2023 count
Owner
State
State Highway Agency

About this bridge

US 12 over Airport RD is a prestressed concrete continuous stringer/multi-beam or girder carrying US 12 over Airport RD in Walla Walla County, Washington. It was built in 1971, so it is 54 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 2,430 vehicles a day, roughly 11% of them trucks, projected to reach 2,761 by 2039. The structure is 164 ft (50 m) long and 86 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesUS 12
CrossesAirport RD
Location4.5 E JCT SR 125 Spur
RouteU.S. Route 12
CountyWalla Walla County
StateWashington
Coordinates46.08389, -118.28417
Functional classUrban Principal Arterial - Other Freeway or Expressway

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.
Last inspectionMarch 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating62.9 US tons
Inventory rating38 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20 + Mod
Structure length164 ft (50 m)
Longest span65 ft (19.8 m)
Deck width86 ft (26.3 m)
Roadway width82 ft (25 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,430 (2023)
Projected traffic2,761 by 2039
Trucks11%
Lanes on structure4
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
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$6.7 million (2022 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was US 12 over Airport RD built?

It was built in 1971, making it 54 years old in 2025.

What condition is US 12 over Airport RD 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 Airport RD carry?

About 2,430 vehicles per day (2023 count), of which roughly 11% are trucks.

How long is US 12 over Airport RD?

The structure is 164 ft (50 m) long with a longest span of 65 ft (19.8 m) and a deck 86 ft wide.

Who owns US 12 over Airport RD?

It is owned by the State Highway Agency.