US Bridges

Conconogan Road over West Fork Salmon Creek

Good

Okanogan County, Washington · Conconully Reservoir · Structure no. 11CONR002

Built
2018
7 years old
Condition
Good
inspected November 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
56 ft
1 main span
Daily traffic
30
2022 count
Owner
Federal
Bureau of Reclamation

About this bridge

Conconogan Road over West Fork Salmon Creek is a steel stringer/multi-beam or girder carrying Conconogan Road over West Fork Salmon Creek in Okanogan County, Washington. It was built in 2018, so it is 7 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 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 30 vehicles a day, projected to reach 30 by 2042. The structure is 56 ft (17.1 m) long and 12 ft wide. If it were closed, the detour would be 198.8 mi (320 km).

Location

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CarriesConconogan Road
CrossesWest Fork Salmon Creek
LocationConconully Reservoir
CountyOkanogan County
StateWashington
Coordinates48.54093, -119.76443
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
Deck8 Very GoodNo problems noted.
Superstructure9 ExcellentNo problems noted.
Substructure9 ExcellentNo problems noted.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionNovember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating37.8 US tons
Inventory rating29.3 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckWood or timber
Main spans1
Design loadH 20
Structure length56 ft (17.1 m)
Longest span51 ft (15.6 m)
Deck width12 ft (3.7 m)
Roadway width11 ft (3.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic30 (2022)
Projected traffic30 by 2042
Trucks0%
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed198.8 mi (320 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerBureau of Reclamation
Maintained byBureau of Reclamation
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 Conconogan Road over West Fork Salmon Creek built?

It was built in 2018, making it 7 years old in 2025.

What condition is Conconogan Road over West Fork Salmon 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 November 2024.

How much traffic does Conconogan Road over West Fork Salmon Creek carry?

About 30 vehicles per day (2022 count).

How long is Conconogan Road over West Fork Salmon Creek?

The structure is 56 ft (17.1 m) long with a longest span of 51 ft (15.6 m) and a deck 12 ft wide.

Who owns Conconogan Road over West Fork Salmon Creek?

It is owned by the Bureau of Reclamation.