US Bridges

Northwestern Lk RD over White Salmon River

FairPosted for load

Klickitat County, Washington · 00.29 W JCT SR141 · Structure no. 079806000000000

Built
1957
68 years old
Condition
Fair
inspected September 2024
Type
Tee Beam
Prestressed Concrete
Length
198 ft
3 main spans
Daily traffic
552
2023 count
Owner
County
County Highway Agency

About this bridge

Northwestern Lk RD over White Salmon River is a prestressed concrete tee beam carrying Northwestern Lk RD over White Salmon River in Klickitat County, Washington. It was built in 1957, so it is 68 years old, older 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 other load-capacity restriction.

It carries about 552 vehicles a day, roughly 43% of them trucks, projected to reach 687 by 2045. The structure is 198 ft (60.4 m) long and 30 ft wide. If it were closed, the detour would be 98.8 mi (159 km).

CarriesNorthwestern Lk RD
CrossesWhite Salmon River
Location00.29 W JCT SR141
RouteCounty Highway 16080
Coordinates45.78, -121.51556
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 protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusPosted for other load-capacity restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
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 rating43 US tons
Inventory rating18 US tons

Structure

Structure typeTee Beam
MaterialPrestressed Concrete
DeckOther
Main spans3
Design loadH 15
Structure length198 ft (60.4 m)
Longest span88 ft (26.8 m)
Deck width30 ft (9.1 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic552 (2023)
Projected traffic687 by 2045
Trucks43%
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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$7.5 million (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Northwestern Lk RD over White Salmon River built?

It was built in 1957, making it 68 years old in 2025.

What condition is Northwestern Lk RD over White Salmon River 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 September 2024.

How much traffic does Northwestern Lk RD over White Salmon River carry?

About 552 vehicles per day (2023 count), of which roughly 43% are trucks.

How long is Northwestern Lk RD over White Salmon River?

The structure is 198 ft (60.4 m) long with a longest span of 88 ft (26.8 m) and a deck 30 ft wide.

Who owns Northwestern Lk RD over White Salmon River?

It is owned by the County Highway Agency.