US Bridges

Old Dufur South over Eightmile Creek

FairPosted for load

Wasco County, Oregon · 0.2 MI W of 8 MI RD · Structure no. 65C34 142 00661

Built
1914
111 years old
Condition
Fair
inspected August 2024
Type
Tee Beam
Concrete
Length
31 ft
1 main span
Daily traffic
26
2020 count
Owner
County
County Highway Agency

About this bridge

Old Dufur South over Eightmile Creek is a concrete tee beam carrying Old Dufur South over Eightmile Creek in Wasco County, Oregon. It was built in 1914, so it is 111 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 5 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. Its operating status is: posted for load restriction.

It carries about 26 vehicles a day, roughly 20% of them trucks, projected to reach 26 by 2025. The structure is 31 ft (9.4 m) long and 21 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

CarriesOld Dufur South
CrossesEightmile Creek
Location0.2 MI W of 8 MI RD
RouteCounty Highway 0
StateOregon
Coordinates45.52456, -121.10067
Functional classRural Local

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionAugust 2024
Inspection intervalevery 12 months
Operating statusPosted for load restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation2: Basically intolerable, requiring high priority of replacement
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating9.6 US tons
Inventory rating7.5 US tons

Structure

Structure typeTee Beam
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadH 15
Structure length31 ft (9.4 m)
Longest span30 ft (9.1 m)
Deck width21 ft (6.3 m)
Roadway width19 ft (5.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic26 (2020)
Projected traffic26 by 2025
Trucks20%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusPossibly eligible for the National Register; requires further investigation
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$207,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Old Dufur South over Eightmile Creek built?

It was built in 1914, making it 111 years old in 2025.

What condition is Old Dufur South over Eightmile Creek 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 Old Dufur South over Eightmile Creek carry?

About 26 vehicles per day (2020 count), of which roughly 20% are trucks.

How long is Old Dufur South over Eightmile Creek?

The structure is 31 ft (9.4 m) long with a longest span of 30 ft (9.1 m) and a deck 21 ft wide.

Who owns Old Dufur South over Eightmile Creek?

It is owned by the County Highway Agency.