US Bridges

Tygh Valley Road over White River

Fair

Wasco County, Oregon · 010 MI East of Tygh Vally · Structure no. 00917AB40700152

Built
1983
42 years old
Condition
Fair
inspected August 2024
Type
Tee Beam
Prestressed Concrete
Length
109 ft
1 main span
Daily traffic
1,304
2020 count
Owner
County
County Highway Agency

About this bridge

Tygh Valley Road over White River is a prestressed concrete tee beam carrying Tygh Valley Road over White River in Wasco County, Oregon. It was built in 1983, so it is 42 years old, younger than the Oregon average of 49.9 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 1,304 vehicles a day, roughly 10% of them trucks, projected to reach 1,494 by 2025. The structure is 109 ft (33.2 m) long and 40 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

CarriesTygh Valley Road
CrossesWhite River
Location010 MI East of Tygh Vally
RouteCounty Highway 0
StateOregon
Coordinates45.23471, -121.16061
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.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionAugust 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating29.7 US tons
Inventory rating22.8 US tons

Structure

Structure typeTee Beam
MaterialPrestressed Concrete
DeckOther
Main spans1
Design loadHS 20
Structure length109 ft (33.2 m)
Longest span108 ft (32.9 m)
Deck width40 ft (12.2 m)
Roadway width37 ft (11.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,304 (2020)
Projected traffic1,494 by 2025
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed0.6 mi (1 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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Tygh Valley Road over White River built?

It was built in 1983, making it 42 years old in 2025.

What condition is Tygh Valley Road over White 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 August 2024.

How much traffic does Tygh Valley Road over White River carry?

About 1,304 vehicles per day (2020 count), of which roughly 10% are trucks.

How long is Tygh Valley Road over White River?

The structure is 109 ft (33.2 m) long with a longest span of 108 ft (32.9 m) and a deck 40 ft wide.

Who owns Tygh Valley Road over White River?

It is owned by the County Highway Agency.