US Bridges

SR 261 over Tucannon River

Good

Columbia County, Washington · 10.3 N JCT US 12 · Structure no. 000000ON0000000

Built
1967
58 years old
Condition
Good
inspected July 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
213 ft
3 main spans
Daily traffic
485
2023 count
Owner
State
State Highway Agency

About this bridge

SR 261 over Tucannon River is a prestressed concrete stringer/multi-beam or girder carrying SR 261 over Tucannon River in Columbia County, Washington. It was built in 1967, so it is 58 years old, older 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 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 485 vehicles a day, roughly 18% of them trucks, projected to reach 471 by 2039. The structure is 213 ft (64.9 m) long and 31 ft wide. If it were closed, the detour would be 11.8 mi (19 km).

CarriesSR 261
CrossesTucannon River
Location10.3 N JCT US 12
RouteState Highway 261
Coordinates46.54211, -118.16061
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
Deck8 Very GoodNo problems noted.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating68 US tons
Inventory rating40 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length213 ft (64.9 m)
Longest span67 ft (20.4 m)
Deck width31 ft (9.4 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic485 (2023)
Projected traffic471 by 2039
Trucks18%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed11.8 mi (19 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$2.6 million (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was SR 261 over Tucannon River built?

It was built in 1967, making it 58 years old in 2025.

What condition is SR 261 over Tucannon River 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 SR 261 over Tucannon River carry?

About 485 vehicles per day (2023 count), of which roughly 18% are trucks.

How long is SR 261 over Tucannon River?

The structure is 213 ft (64.9 m) long with a longest span of 67 ft (20.4 m) and a deck 31 ft wide.

Who owns SR 261 over Tucannon River?

It is owned by the State Highway Agency.