US Bridges

Lower Eightmile RD over Eightmile Creek

Fair

Wasco County, Oregon · 4.0 Mi. N. of HWY 197 · Structure no. 00893 182 00419

Built
1922
103 years old
Condition
Fair
inspected August 2024
Type
Tee Beam
Concrete
Length
34 ft
1 main span
Daily traffic
75
2020 count
Owner
County
County Highway Agency

About this bridge

Lower Eightmile RD over Eightmile Creek is a concrete tee beam carrying Lower Eightmile RD over Eightmile Creek in Wasco County, Oregon. It was built in 1922, so it is 103 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.

It carries about 75 vehicles a day, projected to reach 85 by 2025. The structure is 34 ft (10.4 m) long and 24 ft wide. If it were closed, the detour would be 2.5 mi (4 km).

Location

Open in Google Maps
CarriesLower Eightmile RD
CrossesEightmile Creek
Location4.0 Mi. N. of HWY 197
RouteCounty Highway 0
CountyWasco County
StateOregon
Coordinates45.57051, -121.05587
Functional classRural Minor 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
Deck7 GoodSome minor problems.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
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 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 geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating29.3 US tons
Inventory rating22.5 US tons

Structure

Structure typeTee Beam
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadH 15
Structure length34 ft (10.4 m)
Longest span32 ft (9.8 m)
Deck width24 ft (7.3 m)
Roadway width21 ft (6.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic75 (2020)
Projected traffic85 by 2025
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed2.5 mi (4 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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Lower Eightmile RD over Eightmile Creek built?

It was built in 1922, making it 103 years old in 2025.

What condition is Lower Eightmile RD 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 Lower Eightmile RD over Eightmile Creek carry?

About 75 vehicles per day (2020 count).

How long is Lower Eightmile RD over Eightmile Creek?

The structure is 34 ft (10.4 m) long with a longest span of 32 ft (9.8 m) and a deck 24 ft wide.

Who owns Lower Eightmile RD over Eightmile Creek?

It is owned by the County Highway Agency.