US Bridges

Tienhaara Road over Salmon Creek

FairPosted for load

Pacific County, Washington · 0.1 W Wahkiakum CO · Structure no. 081356000000000

Built
1980
45 years old
Condition
Fair
inspected June 2024
Type
Slab
Prestressed Concrete
Length
65 ft
2 main spans
Daily traffic
74
2023 count
Owner
County
County Highway Agency

About this bridge

Tienhaara Road over Salmon Creek is a prestressed concrete slab carrying Tienhaara Road over Salmon Creek in Pacific County, Washington. It was built in 1980, so it is 45 years old, younger than the Washington average of 49.8 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 6 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. Its operating status is: posted for load restriction.

It carries about 74 vehicles a day, projected to reach 80 by 2043. The structure is 65 ft (19.8 m) long and 28 ft wide. If it were closed, the detour would be 98.8 mi (159 km).

Location

Open in Google Maps
CarriesTienhaara Road
CrossesSalmon Creek
Location0.1 W Wahkiakum CO
RouteCounty Highway 19060
CountyPacific County
StateWashington
Coordinates46.35736, -123.73008
Functional classRural Local

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJune 2024
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating28 US tons
Inventory rating20.9 US tons

Structure

Structure typeSlab
MaterialPrestressed Concrete
DeckOther
Main spans2
Design loadH 20
Structure length65 ft (19.8 m)
Longest span32 ft (9.8 m)
Deck width28 ft (8.5 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic74 (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 proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$741,000 (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Tienhaara Road over Salmon Creek built?

It was built in 1980, making it 45 years old in 2025.

What condition is Tienhaara Road over Salmon Creek in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in June 2024.

How much traffic does Tienhaara Road over Salmon Creek carry?

About 74 vehicles per day (2023 count).

How long is Tienhaara Road over Salmon Creek?

The structure is 65 ft (19.8 m) long with a longest span of 32 ft (9.8 m) and a deck 28 ft wide.

Who owns Tienhaara Road over Salmon Creek?

It is owned by the County Highway Agency.