US Bridges

Woodward Canyon RD over Woodward Canyon

Good

Walla Walla County, Washington · 1.17 NW SR 12 · Structure no. 088459000000000

Built
2012
13 years old
Condition
Good
inspected September 2024
Type
Culvert
Steel
Length
46 ft
1 main span
Daily traffic
102
2020 count
Owner
County
County Highway Agency

About this bridge

Woodward Canyon RD over Woodward Canyon is a steel culvert carrying Woodward Canyon RD over Woodward Canyon in Walla Walla County, Washington. It was built in 2012, so it is 13 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 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 102 vehicles a day, roughly 40% of them trucks, projected to reach 130 by 2046. The structure is 46 ft (14.1 m) long and 70 ft wide. If it were closed, the detour would be 14.3 mi (23 km).

CarriesWoodward Canyon RD
CrossesWoodward Canyon
Location1.17 NW SR 12
RouteCounty Highway 37150
Coordinates46.06462, -118.61661
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
Channel and channel protection8 Very GoodNo problems noted.
Culvert8 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
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating39.2 US tons
Inventory rating31.4 US tons

Structure

Structure typeCulvert
MaterialSteel
DeckNot applicable
Main spans1
Design loadHL 93
Structure length46 ft (14.1 m)
Longest span46 ft (14.1 m)
Deck width70 ft (21.3 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic102 (2020)
Projected traffic130 by 2046
Trucks40%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed14.3 mi (23 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$2 million (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Woodward Canyon RD over Woodward Canyon built?

It was built in 2012, making it 13 years old in 2025.

What condition is Woodward Canyon RD over Woodward 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 Woodward Canyon RD over Woodward Canyon carry?

About 102 vehicles per day (2020 count), of which roughly 40% are trucks.

How long is Woodward Canyon RD over Woodward Canyon?

The structure is 46 ft (14.1 m) long with a longest span of 46 ft (14.1 m) and a deck 70 ft wide.

Who owns Woodward Canyon RD over Woodward Canyon?

It is owned by the County Highway Agency.