US Bridges

Woodward Canyon RD over US 12

Good

Walla Walla County, Washington · 15.2 E JCT US 730 Spur · Structure no. 0019406F0000000

Built
2023
2 years old
Condition
Good
inspected July 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
147 ft
1 main span
Daily traffic
100
2019 count
Owner
State
State Highway Agency

About this bridge

Woodward Canyon RD over US 12 is a prestressed concrete stringer/multi-beam or girder carrying Woodward Canyon RD over US 12 in Walla Walla County, Washington. It was built in 2023, so it is 2 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 100 vehicles a day, roughly 1% of them trucks, projected to reach 110 by 2039. The structure is 147 ft (44.7 m) long and 37 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

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CarriesWoodward Canyon RD
CrossesUS 12
Location15.2 E JCT US 730 Spur
RouteCounty Highway 12
CountyWalla Walla County
StateWashington
Coordinates46.06033, -118.60708
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.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Last inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation8: Equal to present desirable criteria
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating66.8 US tons
Inventory rating50 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHL 93
Structure length147 ft (44.7 m)
Longest span141 ft (43.1 m)
Deck width37 ft (11.3 m)
Roadway width34 ft (10.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic100 (2019)
Projected traffic110 by 2039
Trucks1%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed5 mi (8 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$2.4 million (2022 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was Woodward Canyon RD over US 12 built?

It was built in 2023, making it 2 years old in 2025.

What condition is Woodward Canyon RD over US 12 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 July 2023.

How much traffic does Woodward Canyon RD over US 12 carry?

About 100 vehicles per day (2019 count), of which roughly 1% are trucks.

How long is Woodward Canyon RD over US 12?

The structure is 147 ft (44.7 m) long with a longest span of 141 ft (43.1 m) and a deck 37 ft wide.

Who owns Woodward Canyon RD over US 12?

It is owned by the State Highway Agency.