US Bridges

Skamania Mines RD over West Fork Washougal Rive

Good

Skamania County, Washington · 1.33 N JCT Skye RD · Structure no. 082368000000000

Built
1977
48 years old
Condition
Good
inspected June 2024
Type
Tee Beam
Prestressed Concrete
Length
84 ft
1 main span
Daily traffic
114
2024 count
Owner
County
County Highway Agency

About this bridge

Skamania Mines RD over West Fork Washougal Rive is a prestressed concrete tee beam carrying Skamania Mines RD over West Fork Washougal Rive in Skamania County, Washington. It was built in 1977, so it is 48 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 114 vehicles a day, roughly 8% of them trucks, projected to reach 165 by 2042. The structure is 84 ft (25.6 m) long and 30 ft wide. If it were closed, the detour would be 11.8 mi (19 km).

CarriesSkamania Mines RD
CrossesWest Fork Washougal Rive
Location1.33 N JCT Skye RD
RouteCounty Highway 11180
Coordinates45.66306, -122.23917
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 protection8 Very GoodNo problems noted.
Last inspectionJune 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations on dry land well above flood water elevations
Structural evaluation2: Basically intolerable, requiring high priority of replacement
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating11 US tons
Inventory rating8.6 US tons

Structure

Structure typeTee Beam
MaterialPrestressed Concrete
DeckOther
Main spans1
Design loadHS 20
Structure length84 ft (25.6 m)
Longest span80 ft (24.4 m)
Deck width30 ft (9.1 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic114 (2024)
Projected traffic165 by 2042
Trucks8%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed11.8 mi (19 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$3.4 million (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Skamania Mines RD over West Fork Washougal Rive built?

It was built in 1977, making it 48 years old in 2025.

What condition is Skamania Mines RD over West Fork Washougal Rive 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 Skamania Mines RD over West Fork Washougal Rive carry?

About 114 vehicles per day (2024 count), of which roughly 8% are trucks.

How long is Skamania Mines RD over West Fork Washougal Rive?

The structure is 84 ft (25.6 m) long with a longest span of 80 ft (24.4 m) and a deck 30 ft wide.

Who owns Skamania Mines RD over West Fork Washougal Rive?

It is owned by the County Highway Agency.