US Bridges

SR 530 over Skagit River

Fair

Skagit County, Washington · 14.5 N Snohomish CO · Structure no. 000000QY0000000

Built
1961
64 years old
Condition
Fair
inspected May 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
506 ft
3 main spans
Daily traffic
1,475
2023 count
Owner
State
State Highway Agency

About this bridge

SR 530 over Skagit River is a steel continuous stringer/multi-beam or girder carrying SR 530 over Skagit River in Skagit County, Washington. It was built in 1961, so it is 64 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.

It carries about 1,475 vehicles a day, roughly 11% of them trucks, projected to reach 2,129 by 2039. The structure is 506 ft (154.2 m) long and 31 ft wide. If it were closed, the detour would be 23 mi (37 km).

Location

Open in Google Maps
CarriesSR 530
CrossesSkagit River
Location14.5 N Snohomish CO
RouteState Highway 530
CountySkagit County
StateWashington
Coordinates48.48417, -121.59297
Functional classRural Minor Arterial

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 protection8 Very GoodNo problems noted.
Last inspectionMay 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating56 US tons
Inventory rating33 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3 (+2 approach)
Design loadH 15
Structure length506 ft (154.2 m)
Longest span177 ft (53.9 m)
Deck width31 ft (9.6 m)
Roadway width24 ft (7.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,475 (2023)
Projected traffic2,129 by 2039
Trucks11%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed23 mi (37 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusPossibly eligible for the National Register; requires further investigation
Work proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$7.7 million (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was SR 530 over Skagit River built?

It was built in 1961, making it 64 years old in 2025.

What condition is SR 530 over Skagit 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 May 2024.

How much traffic does SR 530 over Skagit River carry?

About 1,475 vehicles per day (2023 count), of which roughly 11% are trucks.

How long is SR 530 over Skagit River?

The structure is 506 ft (154.2 m) long with a longest span of 177 ft (53.9 m) and a deck 31 ft wide.

Who owns SR 530 over Skagit River?

It is owned by the State Highway Agency.