US Bridges

Slide Ridge over 25 Mile Creek

Good

Chelan County, Washington · No Data Entered · Structure no. 061702000013575

Built
2010
15 years old
Condition
Good
inspected May 2024
Type
Box Beam or Girders - Multiple
Steel
Length
59 ft
1 main span
Daily traffic
20
Owner
Federal
U.S. Forest Service

About this bridge

Slide Ridge over 25 Mile Creek is a steel box beam or girders - multiple carrying Slide Ridge over 25 Mile Creek in Chelan County, Washington. It was built in 2010, so it is 15 years old, younger 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 20 vehicles a day, projected to reach 30 by 2045. The structure is 59 ft (18 m) long and 23 ft wide. If it were closed, the detour would be 44.7 mi (72 km).

CarriesSlide Ridge
Crosses25 Mile Creek
LocationNo Data Entered
RouteFederal Lands Road 84100
Coordinates47.95844, -120.29271
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.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionMay 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 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 rating45.7 US tons
Inventory rating35.4 US tons

Structure

MaterialSteel
DeckCorrugated steel
Main spans1
Design loadHL 93
Structure length59 ft (18 m)
Longest span58 ft (17.7 m)
Deck width23 ft (6.9 m)
Roadway width22 ft (6.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic20 (—)
Projected traffic30 by 2045
Trucks—
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed44.7 mi (72 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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Slide Ridge over 25 Mile Creek built?

It was built in 2010, making it 15 years old in 2025.

What condition is Slide Ridge over 25 Mile 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 May 2024.

How much traffic does Slide Ridge over 25 Mile Creek carry?

About 20 vehicles per day (latest count).

How long is Slide Ridge over 25 Mile Creek?

The structure is 59 ft (18 m) long with a longest span of 58 ft (17.7 m) and a deck 23 ft wide.

Who owns Slide Ridge over 25 Mile Creek?

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