US Bridges

SR 526 over Airport RD

Fair

Snohomish County, Washington · 1.4 E JCT SR 525 · Structure no. 0008446A0000000

Built
1969
56 years old
Condition
Fair
inspected October 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete Continuous
Length
162 ft
3 main spans
Daily traffic
15,077
2023 count
Owner
State
State Highway Agency

About this bridge

SR 526 over Airport RD is a prestressed concrete continuous stringer/multi-beam or girder carrying SR 526 over Airport RD in Snohomish County, Washington. It was built in 1969, so it is 56 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 15,077 vehicles a day, roughly 3% of them trucks, projected to reach 19,997 by 2039. The structure is 162 ft (49.4 m) long and 77 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

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CarriesSR 526
CrossesAirport RD
Location1.4 E JCT SR 525
RouteState Highway 526
CountySnohomish County
StateWashington
Coordinates47.92222, -122.27233
Functional classUrban Principal Arterial - Other Freeway or Expressway

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.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionOctober 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating70 US tons
Inventory rating41 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20 + Mod
Structure length162 ft (49.4 m)
Longest span76 ft (23.1 m)
Deck width77 ft (23.6 m)
Roadway width72 ft (21.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic15,077 (2023)
Projected traffic19,997 by 2039
Trucks3%
Lanes on structure4
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed1.9 mi (3 km)
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$5.7 million (2022 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was SR 526 over Airport RD built?

It was built in 1969, making it 56 years old in 2025.

What condition is SR 526 over Airport RD 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 October 2023.

How much traffic does SR 526 over Airport RD carry?

About 15,077 vehicles per day (2023 count), of which roughly 3% are trucks.

How long is SR 526 over Airport RD?

The structure is 162 ft (49.4 m) long with a longest span of 76 ft (23.1 m) and a deck 77 ft wide.

Who owns SR 526 over Airport RD?

It is owned by the State Highway Agency.