US Bridges

Twickenham Road over John Day River (twicken)

Fair

Wheeler County, Oregon · 074 MI NW of JCT HWY 207 · Structure no. 069C11057900740

Built
1960
65 years old
Condition
Fair
inspected May 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
342 ft
3 main spans
Daily traffic
170
2020 count
Owner
County
County Highway Agency

About this bridge

Twickenham Road over John Day River (twicken) is a steel stringer/multi-beam or girder carrying Twickenham Road over John Day River (twicken) in Wheeler County, Oregon. It was built in 1960, so it is 65 years old, older 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 170 vehicles a day, roughly 15% of them trucks, projected to reach 200 by 2025. The structure is 342 ft (104.2 m) long and 25 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesTwickenham Road
CrossesJohn Day River (twicken)
Location074 MI NW of JCT HWY 207
RouteCounty Highway 0
CountyWheeler County
StateOregon
Coordinates44.73718, -120.16566
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.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMay 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating23.6 US tons
Inventory rating18.2 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans3 (+2 approach)
Design loadUnknown
Structure length342 ft (104.2 m)
Longest span104 ft (31.7 m)
Deck width25 ft (7.5 m)
Roadway width20 ft (6.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic170 (2020)
Projected traffic200 by 2025
Trucks15%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 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 Twickenham Road over John Day River (twicken) built?

It was built in 1960, making it 65 years old in 2025.

What condition is Twickenham Road over John Day River (twicken) 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 May 2023.

How much traffic does Twickenham Road over John Day River (twicken) carry?

About 170 vehicles per day (2020 count), of which roughly 15% are trucks.

How long is Twickenham Road over John Day River (twicken)?

The structure is 342 ft (104.2 m) long with a longest span of 104 ft (31.7 m) and a deck 25 ft wide.

Who owns Twickenham Road over John Day River (twicken)?

It is owned by the County Highway Agency.