US Bridges

SR 534 over I-5

Fair

Skagit County, Washington · JCT I-5 · Structure no. 0008650B0000000

Built
1970
55 years old
Condition
Fair
inspected April 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
240 ft
2 main spans
Daily traffic
8,061
2023 count
Owner
State
State Highway Agency

About this bridge

SR 534 over I-5 is a prestressed concrete stringer/multi-beam or girder carrying SR 534 over I-5 in Skagit County, Washington. It was built in 1970, so it is 55 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 8,061 vehicles a day, roughly 8% of them trucks, projected to reach 11,820 by 2039. The structure is 240 ft (73.2 m) long and 62 ft wide.

Location

Open in Google Maps
CarriesSR 534
CrossesI-5
LocationJCT I-5
RouteState Highway 534
CountySkagit County
StateWashington
Coordinates48.34119, -122.33597
Functional classRural Major 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
Deck7 GoodSome minor problems.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Last inspectionApril 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating28.2 US tons
Inventory rating21.8 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20 + Mod
Structure length240 ft (73.2 m)
Longest span117 ft (35.7 m)
Deck width62 ft (18.9 m)
Roadway width59 ft (18 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic8,061 (2023)
Projected traffic11,820 by 2039
Trucks8%
Lanes on structure3
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed—
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$7 million (2022 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was SR 534 over I-5 built?

It was built in 1970, making it 55 years old in 2025.

What condition is SR 534 over I-5 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 April 2023.

How much traffic does SR 534 over I-5 carry?

About 8,061 vehicles per day (2023 count), of which roughly 8% are trucks.

How long is SR 534 over I-5?

The structure is 240 ft (73.2 m) long with a longest span of 117 ft (35.7 m) and a deck 62 ft wide.

Who owns SR 534 over I-5?

It is owned by the State Highway Agency.