US Bridges

US 12 over 9th Ave

Good

Walla Walla County, Washington · 0.9 E JCT SR 125 Spur · Structure no. 0009110C0000000

Built
1972
53 years old
Condition
Good
inspected June 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete Continuous
Length
211 ft
3 main spans
Daily traffic
6,661
2023 count
Owner
State
State Highway Agency

About this bridge

US 12 over 9th Ave is a prestressed concrete continuous stringer/multi-beam or girder carrying US 12 over 9th Ave in Walla Walla County, Washington. It was built in 1972, so it is 53 years old, older 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 6,661 vehicles a day, roughly 11% of them trucks, projected to reach 6,634 by 2039. The structure is 211 ft (64.3 m) long and 99 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesUS 12
Crosses9th Ave
Location0.9 E JCT SR 125 Spur
RouteU.S. Route 12
CountyWalla Walla County
StateWashington
Coordinates46.06994, -118.35161
Functional classUrban Principal Arterial - Other Freeway or Expressway

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.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Last inspectionJune 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 rating46 US tons
Inventory rating28 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20 + Mod
Structure length211 ft (64.3 m)
Longest span90 ft (27.4 m)
Deck width99 ft (30.1 m)
Roadway width91 ft (27.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic6,661 (2023)
Projected traffic6,634 by 2039
Trucks11%
Lanes on structure5
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$9.5 million (2022 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was US 12 over 9th Ave built?

It was built in 1972, making it 53 years old in 2025.

What condition is US 12 over 9th Ave 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 2024.

How much traffic does US 12 over 9th Ave carry?

About 6,661 vehicles per day (2023 count), of which roughly 11% are trucks.

How long is US 12 over 9th Ave?

The structure is 211 ft (64.3 m) long with a longest span of 90 ft (27.4 m) and a deck 99 ft wide.

Who owns US 12 over 9th Ave?

It is owned by the State Highway Agency.