US Bridges

Conc Sauk Valley R over Sauk River

FairPosted for load

Skagit County, Washington · 0.14 NW JCT SR 530 · Structure no. 084141000000000

Built
1930
95 years old, rebuilt 1953
Condition
Fair
inspected March 2024
Type
Truss - Thru
Steel
Length
304 ft
1 main span
Daily traffic
158
2020 count
Owner
County
County Highway Agency

About this bridge

Conc Sauk Valley R over Sauk River is a steel truss - thru carrying Conc Sauk Valley R over Sauk River in Skagit County, Washington. It was built in 1930 and reconstructed in 1953, so it is 95 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 load restriction.

It carries about 158 vehicles a day, roughly 11% of them trucks, projected to reach 234 by 2040. The structure is 304 ft (92.7 m) long and 16 ft wide. If it were closed, the detour would be 37.3 mi (60 km).

CarriesConc Sauk Valley R
CrossesSauk River
Location0.14 NW JCT SR 530
RouteCounty Highway 8000
Coordinates48.40658, -121.5589
Functional classRural Minor Collector

Condition and inspection

Fair

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

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMarch 2024
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment3: Basically intolerable, requiring high priority of corrective action
Operating rating20.4 US tons
Inventory rating15.8 US tons

Structure

Structure typeTruss - Thru
MaterialSteel
DeckOpen grating
Main spans1 (+2 approach)
Design loadHS 20
Structure length304 ft (92.7 m)
Longest span225 ft (68.6 m)
Deck width16 ft (4.9 m)
Roadway width14 ft (4.3 m)
Vertical clearance over deck18 ft (5.5 m)

Traffic and service

Average daily traffic158 (2020)
Projected traffic234 by 2040
Trucks11%
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed37.3 mi (60 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$7.8 million (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Conc Sauk Valley R over Sauk River built?

It was built in 1930, making it 95 years old in 2025. It was reconstructed in 1953.

What condition is Conc Sauk Valley R over Sauk 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 March 2024.

How much traffic does Conc Sauk Valley R over Sauk River carry?

About 158 vehicles per day (2020 count), of which roughly 11% are trucks.

How long is Conc Sauk Valley R over Sauk River?

The structure is 304 ft (92.7 m) long with a longest span of 225 ft (68.6 m) and a deck 16 ft wide.

Who owns Conc Sauk Valley R over Sauk River?

It is owned by the County Highway Agency.