US Bridges

Lower Eightmile RD over Eightmile Creek

Fair

Wasco County, Oregon · 7.6 Miles N of HWY 197 · Structure no. 18774 000 00798

Built
2001
24 years old
Condition
Fair
inspected August 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
104 ft
1 main span
Daily traffic
627
2020 count
Owner
County
County Highway Agency

About this bridge

Lower Eightmile RD over Eightmile Creek is a prestressed concrete stringer/multi-beam or girder carrying Lower Eightmile RD over Eightmile Creek in Wasco County, Oregon. It was built in 2001, so it is 24 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 627 vehicles a day, roughly 25% of them trucks, projected to reach 717 by 2025. The structure is 104 ft (31.7 m) long and 34 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

CarriesLower Eightmile RD
CrossesEightmile Creek
Location7.6 Miles N of HWY 197
RouteCounty Highway 0
StateOregon
Coordinates45.60636, -121.08576
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
Deck7 GoodSome minor problems.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
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 evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating81 US tons
Inventory rating62.5 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHL 93
Structure length104 ft (31.7 m)
Longest span102 ft (31 m)
Deck width34 ft (10.5 m)
Roadway width31 ft (9.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic627 (2020)
Projected traffic717 by 2025
Trucks25%
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 Lower Eightmile RD over Eightmile Creek built?

It was built in 2001, making it 24 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 627 vehicles per day (2020 count), of which roughly 25% are trucks.

How long is Lower Eightmile RD over Eightmile Creek?

The structure is 104 ft (31.7 m) long with a longest span of 102 ft (31 m) and a deck 34 ft wide.

Who owns Lower Eightmile RD over Eightmile Creek?

It is owned by the County Highway Agency.