US Bridges

Wooden RD over Walker Canyon

Good

Walla Walla County, Washington · 2.223 W Lwr Monumental · Structure no. 086529000000000

Built
2001
24 years old
Condition
Good
inspected September 2024
Type
Tee Beam
Concrete
Length
26 ft
1 main span
Daily traffic
32
2024 count
Owner
County
County Highway Agency

About this bridge

Wooden RD over Walker Canyon is a concrete tee beam carrying Wooden RD over Walker Canyon in Walla Walla County, Washington. It was built in 2001, so it is 24 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 32 vehicles a day, roughly 40% of them trucks, projected to reach 39 by 2046. The structure is 26 ft (7.9 m) long and 35 ft wide. If it were closed, the detour would be 14.9 mi (24 km).

CarriesWooden RD
CrossesWalker Canyon
Location2.223 W Lwr Monumental
RouteCounty Highway 43700
Coordinates46.4317, -118.53356
Functional classRural Minor Collector

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.
Superstructure7 GoodSome minor problems.
Substructure8 Very GoodNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry8: Equal to present desirable criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating91.1 US tons
Inventory rating70.3 US tons

Structure

Structure typeTee Beam
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length26 ft (7.9 m)
Longest span25 ft (7.6 m)
Deck width35 ft (10.8 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic32 (2024)
Projected traffic39 by 2046
Trucks40%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesRelief for waterway
Detour if closed14.9 mi (24 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$1.3 million (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Wooden RD over Walker Canyon built?

It was built in 2001, making it 24 years old in 2025.

What condition is Wooden RD over Walker Canyon 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 September 2024.

How much traffic does Wooden RD over Walker Canyon carry?

About 32 vehicles per day (2024 count), of which roughly 40% are trucks.

How long is Wooden RD over Walker Canyon?

The structure is 26 ft (7.9 m) long with a longest span of 25 ft (7.6 m) and a deck 35 ft wide.

Who owns Wooden RD over Walker Canyon?

It is owned by the County Highway Agency.