US Bridges

Tucannon Road over Tucannon River

FairPosted for load

Columbia County, Washington · 4.35 SE JCT SR126 · Structure no. 084277000000000

Built
1965
60 years old
Condition
Fair
inspected October 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
57 ft
1 main span
Daily traffic
200
2019 count
Owner
County
County Highway Agency

About this bridge

Tucannon Road over Tucannon River is a steel stringer/multi-beam or girder carrying Tucannon Road over Tucannon River in Columbia County, Washington. It was built in 1965, so it is 60 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 5 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. Its operating status is: posted for load restriction.

It carries about 200 vehicles a day, roughly 15% of them trucks, projected to reach 300 by 2041. The structure is 57 ft (17.4 m) long and 26 ft wide. If it were closed, the detour would be 21.1 mi (34 km).

Location

Open in Google Maps
CarriesTucannon Road
CrossesTucannon River
Location4.35 SE JCT SR126
RouteCounty Highway 92330
CountyColumbia County
StateWashington
Coordinates46.39653, -117.71758
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionOctober 2023
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment6: Equal to present minimum criteria
Operating rating21.4 US tons
Inventory rating16.8 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckCorrugated steel
Main spans1
Design loadHS 20
Structure length57 ft (17.4 m)
Longest span56 ft (17.1 m)
Deck width26 ft (7.9 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic200 (2019)
Projected traffic300 by 2041
Trucks15%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed21.1 mi (34 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 proposedOther structural work, including hydraulic replacements
Estimated improvement cost$812,000 (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Tucannon Road over Tucannon River built?

It was built in 1965, making it 60 years old in 2025.

What condition is Tucannon Road over Tucannon River 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 2023.

How much traffic does Tucannon Road over Tucannon River carry?

About 200 vehicles per day (2019 count), of which roughly 15% are trucks.

How long is Tucannon Road over Tucannon River?

The structure is 57 ft (17.4 m) long with a longest span of 56 ft (17.1 m) and a deck 26 ft wide.

Who owns Tucannon Road over Tucannon River?

It is owned by the County Highway Agency.