US Bridges

Powers Road over Tucannon River

Good

Columbia County, Washington · 0.1 SW JCT SR 261 · Structure no. 081194000000000

Built
1973
52 years old
Condition
Good
inspected October 2023
Type
Channel Beam
Prestressed Concrete
Length
162 ft
3 main spans
Daily traffic
75
2019 count
Owner
County
County Highway Agency

About this bridge

Powers Road over Tucannon River is a prestressed concrete channel beam carrying Powers Road over Tucannon River in Columbia County, Washington. It was built in 1973, so it is 52 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 75 vehicles a day, roughly 20% of them trucks, projected to reach 100 by 2041. The structure is 162 ft (49.4 m) long and 29 ft wide. If it were closed, the detour would be 14.3 mi (23 km).

CarriesPowers Road
CrossesTucannon River
Location0.1 SW JCT SR 261
RouteCounty Highway 21590
Coordinates46.53774, -118.15541
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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionOctober 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating75 US tons
Inventory rating42.9 US tons

Structure

Structure typeChannel Beam
MaterialPrestressed Concrete
DeckOther
Main spans3
Design loadHS 20
Structure length162 ft (49.4 m)
Longest span59 ft (18 m)
Deck width29 ft (8.7 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic75 (2019)
Projected traffic100 by 2041
Trucks20%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed14.3 mi (23 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 proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$2.3 million (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Powers Road over Tucannon River built?

It was built in 1973, making it 52 years old in 2025.

What condition is Powers Road 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 October 2023.

How much traffic does Powers Road over Tucannon River carry?

About 75 vehicles per day (2019 count), of which roughly 20% are trucks.

How long is Powers Road over Tucannon River?

The structure is 162 ft (49.4 m) long with a longest span of 59 ft (18 m) and a deck 29 ft wide.

Who owns Powers Road over Tucannon River?

It is owned by the County Highway Agency.