US Bridges

Eightmile Road over Eightmile Creek

Good

Okanogan County, Washington · No Data Entered · Structure no. 060805000001030

Built
1955
70 years old
Condition
Good
inspected June 2024
Type
Stringer/Multi-beam or Girder
Wood or Timber
Length
39 ft
3 main spans
Daily traffic
40
2006 count
Owner
Federal
U.S. Forest Service

About this bridge

Eightmile Road over Eightmile Creek is a wood or timber stringer/multi-beam or girder carrying Eightmile Road over Eightmile Creek in Okanogan County, Washington. It was built in 1955, so it is 70 years old, older than the Washington average of 49.8 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 40 vehicles a day, projected to reach 60 by 2045. The structure is 39 ft (12 m) long and 16 ft wide. If it were closed, the detour would be 98.2 mi (158 km).

CarriesEightmile Road
CrossesEightmile Creek
LocationNo Data Entered
RouteFederal Lands Road 51300
Coordinates48.689, -120.26279
Functional classRural Local

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJune 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation7: Better than 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 rating43 US tons
Inventory rating31 US tons

Structure

MaterialWood or Timber
DeckWood or timber
Main spans3
Design loadOther
Structure length39 ft (12 m)
Longest span28 ft (8.4 m)
Deck width16 ft (4.9 m)
Roadway width14 ft (4.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic40 (2006)
Projected traffic60 by 2045
Trucks—
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed98.2 mi (158 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerU.S. Forest Service
Maintained byU.S. Forest Service
Historic statusHistorical significance not determinable at this time
Work proposedOther structural work, including hydraulic replacements
Estimated improvement cost$14,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Eightmile Road over Eightmile Creek built?

It was built in 1955, making it 70 years old in 2025.

What condition is Eightmile Road over Eightmile Creek in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in June 2024.

How much traffic does Eightmile Road over Eightmile Creek carry?

About 40 vehicles per day (2006 count).

How long is Eightmile Road over Eightmile Creek?

The structure is 39 ft (12 m) long with a longest span of 28 ft (8.4 m) and a deck 16 ft wide.

Who owns Eightmile Road over Eightmile Creek?

It is owned by the U.S. Forest Service.