US Bridges

Smith Springs RD over Colville Gulch

Good

Walla Walla County, Washington · 3.08 N SR 124 · Structure no. 087180000000000

Built
2004
21 years old
Condition
Good
inspected September 2024
Type
Culvert
Aluminum, Wrought Iron, or Cast Iron
Length
39 ft
1 main span
Daily traffic
100
2024 count
Owner
County
County Highway Agency

About this bridge

Smith Springs RD over Colville Gulch is a aluminum, wrought iron, or cast iron culvert carrying Smith Springs RD over Colville Gulch in Walla Walla County, Washington. It was built in 2004, so it is 21 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 15% of them trucks, projected to reach 120 by 2046. The structure is 39 ft (12 m) long and 42 ft wide. If it were closed, the detour would be 18 mi (29 km).

CarriesSmith Springs RD
CrossesColville Gulch
Location3.08 N SR 124
RouteCounty Highway 94250
Coordinates46.33197, -118.27137
Functional classRural Major 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
Deck geometry8: Equal to present desirable criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating44.6 US tons
Inventory rating34.3 US tons

Structure

Structure typeCulvert
MaterialAluminum, Wrought Iron, or Cast Iron
DeckNot applicable
Main spans1
Design loadHS 20 + Mod
Structure length39 ft (12 m)
Longest span39 ft (12 m)
Deck width42 ft (12.8 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic100 (2024)
Projected traffic120 by 2046
Trucks15%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesRelief for waterway
Detour if closed18 mi (29 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$1.8 million (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Smith Springs RD over Colville Gulch built?

It was built in 2004, making it 21 years old in 2025.

What condition is Smith Springs RD over Colville Gulch 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 Springs RD over Colville Gulch carry?

About 100 vehicles per day (2024 count), of which roughly 15% are trucks.

How long is Smith Springs RD over Colville Gulch?

The structure is 39 ft (12 m) long with a longest span of 39 ft (12 m) and a deck 42 ft wide.

Who owns Smith Springs RD over Colville Gulch?

It is owned by the County Highway Agency.