US Bridges

Turner Road over Whetstone Creek

Fair

Columbia County, Washington · 1.0 E JCT SR 12 · Structure no. 0003980A0000000

Built
1951
74 years old
Condition
Fair
inspected October 2024
Type
Culvert
Concrete Continuous
Length
31 ft
2 main spans
Daily traffic
210
2020 count
Owner
County
County Highway Agency

About this bridge

Turner Road over Whetstone Creek is a concrete continuous culvert carrying Turner Road over Whetstone Creek in Columbia County, Washington. It was built in 1951, so it is 74 years old, older than the Washington average of 49.8 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 6 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 210 vehicles a day, roughly 20% of them trucks, projected to reach 251 by 2042. The structure is 31 ft (9.4 m) long and 39 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

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CarriesTurner Road
CrossesWhetstone Creek
Location1.0 E JCT SR 12
RouteCounty Highway 91260
CountyColumbia County
StateWashington
Coordinates46.39008, -117.92369
Functional classRural Major Collector

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Channel and channel protection7 GoodSome minor problems.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionOctober 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry9: Superior to present desirable criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating28 US tons
Inventory rating17 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans2
Design loadHS 20
Structure length31 ft (9.4 m)
Longest span14 ft (4.3 m)
Deck width39 ft (11.9 m)
Roadway width39 ft (11.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic210 (2020)
Projected traffic251 by 2042
Trucks20%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed5 mi (8 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 proposedOther structural work, including hydraulic replacements
Estimated improvement cost$530,000 (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Turner Road over Whetstone Creek built?

It was built in 1951, making it 74 years old in 2025.

What condition is Turner Road over Whetstone Creek in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in October 2024.

How much traffic does Turner Road over Whetstone Creek carry?

About 210 vehicles per day (2020 count), of which roughly 20% are trucks.

How long is Turner Road over Whetstone Creek?

The structure is 31 ft (9.4 m) long with a longest span of 14 ft (4.3 m) and a deck 39 ft wide.

Who owns Turner Road over Whetstone Creek?

It is owned by the County Highway Agency.