US Bridges

Smith RD over Dry Creek

Good

Walla Walla County, Washington · 0.08 N SR 12 · Structure no. 087418000000000

Built
2006
19 years old
Condition
Good
inspected September 2024
Type
Stringer/Multi-beam or Girder
Concrete Continuous
Length
55 ft
1 main span
Daily traffic
14
2024 count
Owner
County
County Highway Agency

About this bridge

Smith RD over Dry Creek is a concrete continuous stringer/multi-beam or girder carrying Smith RD over Dry Creek in Walla Walla County, Washington. It was built in 2006, so it is 19 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 14 vehicles a day, roughly 5% of them trucks, projected to reach 20 by 2046. The structure is 55 ft (16.8 m) long and 34 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

CarriesSmith RD
CrossesDry Creek
Location0.08 N SR 12
RouteCounty Highway 66160
Coordinates46.11961, -118.2157
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.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations on dry land well above flood water elevations
Structural evaluation8: Equal to present desirable criteria
Deck geometry8: Equal to present desirable criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating56.8 US tons
Inventory rating36.8 US tons

Structure

MaterialConcrete Continuous
DeckOther
Main spans1
Design loadHS 25 or greater
Structure length55 ft (16.8 m)
Longest span53 ft (16.2 m)
Deck width34 ft (10.4 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic14 (2024)
Projected traffic20 by 2046
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.2 mi (10 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$2.3 million (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Smith RD over Dry Creek built?

It was built in 2006, making it 19 years old in 2025.

What condition is Smith RD over Dry Creek 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 Smith RD over Dry Creek carry?

About 14 vehicles per day (2024 count), of which roughly 5% are trucks.

How long is Smith RD over Dry Creek?

The structure is 55 ft (16.8 m) long with a longest span of 53 ft (16.2 m) and a deck 34 ft wide.

Who owns Smith RD over Dry Creek?

It is owned by the County Highway Agency.