US Bridges

Smith Hollow Rd. over Tucannon River

Good

Columbia County, Washington · 0.1 S JCT SR 261 · Structure no. 087684000000000

Built
2008
17 years old
Condition
Good
inspected October 2023
Type
Tee Beam
Prestressed Concrete
Length
121 ft
1 main span
Daily traffic
100
2019 count
Owner
County
County Highway Agency

About this bridge

Smith Hollow Rd. over Tucannon River is a prestressed concrete tee beam carrying Smith Hollow Rd. over Tucannon River in Columbia County, Washington. It was built in 2008, so it is 17 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 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 100 vehicles a day, roughly 20% of them trucks, projected to reach 201 by 2041. The structure is 121 ft (36.9 m) long and 29 ft wide. If it were closed, the detour would be 19.9 mi (32 km).

CarriesSmith Hollow Rd.
CrossesTucannon River
Location0.1 S JCT SR 261
RouteCounty Highway 26330
Coordinates46.50493, -118.06499
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
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
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 geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating85 US tons
Inventory rating47.2 US tons

Structure

Structure typeTee Beam
MaterialPrestressed Concrete
DeckOther
Main spans1
Design loadHS 25 or greater
Structure length121 ft (36.9 m)
Longest span115 ft (35.1 m)
Deck width29 ft (8.7 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic100 (2019)
Projected traffic201 by 2041
Trucks20%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed19.9 mi (32 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$1.7 million (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Smith Hollow Rd. over Tucannon River built?

It was built in 2008, making it 17 years old in 2025.

What condition is Smith Hollow Rd. 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 Smith Hollow Rd. over Tucannon River carry?

About 100 vehicles per day (2019 count), of which roughly 20% are trucks.

How long is Smith Hollow Rd. over Tucannon River?

The structure is 121 ft (36.9 m) long with a longest span of 115 ft (35.1 m) and a deck 29 ft wide.

Who owns Smith Hollow Rd. over Tucannon River?

It is owned by the County Highway Agency.