US Bridges

Alanen Road over Salmon Creek

Good

Pacific County, Washington · 0.16 N Wahkiakum CO · Structure no. 084310000000000

Built
1989
36 years old
Condition
Good
inspected June 2024
Type
Tee Beam
Prestressed Concrete
Length
66 ft
1 main span
Daily traffic
44
2023 count
Owner
County
County Highway Agency

About this bridge

Alanen Road over Salmon Creek is a prestressed concrete tee beam carrying Alanen Road over Salmon Creek in Pacific County, Washington. It was built in 1989, so it is 36 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 44 vehicles a day, projected to reach 80 by 2043. The structure is 66 ft (20.1 m) long and 18 ft wide. If it were closed, the detour would be 98.8 mi (159 km).

Location

Open in Google Maps
CarriesAlanen Road
CrossesSalmon Creek
Location0.16 N Wahkiakum CO
RouteCounty Highway 19810
CountyPacific County
StateWashington
Coordinates46.38678, -123.69628
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.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
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 geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating69 US tons
Inventory rating39 US tons

Structure

Structure typeTee Beam
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length66 ft (20.1 m)
Longest span64 ft (19.5 m)
Deck width18 ft (5.5 m)
Roadway width16 ft (4.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic44 (2023)
Projected traffic80 by 2043
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed98.8 mi (159 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 proposedWidening with deck rehabilitation or replacement
Estimated improvement cost$564,000 (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Alanen Road over Salmon Creek built?

It was built in 1989, making it 36 years old in 2025.

What condition is Alanen Road over 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 June 2024.

How much traffic does Alanen Road over Salmon Creek carry?

About 44 vehicles per day (2023 count).

How long is Alanen Road over Salmon Creek?

The structure is 66 ft (20.1 m) long with a longest span of 64 ft (19.5 m) and a deck 18 ft wide.

Who owns Alanen Road over Salmon Creek?

It is owned by the County Highway Agency.