US Bridges

SR 522 over Snohomish R & Tester RD

Fair

Snohomish County, Washington · 6.4 E JCT SR 9 · Structure no. 0006980B0000000

Built
1963
62 years old
Condition
Fair
inspected October 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
1,680 ft
2 main spans
Daily traffic
15,631
2023 count
Owner
State
State Highway Agency

About this bridge

SR 522 over Snohomish R & Tester RD is a steel continuous stringer/multi-beam or girder carrying SR 522 over Snohomish R & Tester RD in Snohomish County, Washington. It was built in 1963, so it is 62 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 15,631 vehicles a day, roughly 8% of them trucks, projected to reach 21,511 by 2039. The structure is 1,680 ft (512.1 m) long and 36 ft wide. If it were closed, the detour would be 14.3 mi (23 km).

Location

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CarriesSR 522
CrossesSnohomish R & Tester RD
Location6.4 E JCT SR 9
RouteState Highway 522
CountySnohomish County
StateWashington
Coordinates47.83111, -122.04989
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.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionOctober 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
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 alignment8: Equal to present desirable criteria
Operating rating75 US tons
Inventory rating45 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans2 (+7 approach)
Design loadHS 20 + Mod
Structure length1,680 ft (512.1 m)
Longest span336 ft (102.4 m)
Deck width36 ft (10.9 m)
Roadway width31 ft (9.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic15,631 (2023)
Projected traffic21,511 by 2039
Trucks8%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway and waterway
Detour if closed14.3 mi (23 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$36.7 million (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was SR 522 over Snohomish R & Tester RD built?

It was built in 1963, making it 62 years old in 2025.

What condition is SR 522 over Snohomish R & Tester 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 2024.

How much traffic does SR 522 over Snohomish R & Tester RD carry?

About 15,631 vehicles per day (2023 count), of which roughly 8% are trucks.

How long is SR 522 over Snohomish R & Tester RD?

The structure is 1,680 ft (512.1 m) long with a longest span of 336 ft (102.4 m) and a deck 36 ft wide.

Who owns SR 522 over Snohomish R & Tester RD?

It is owned by the State Highway Agency.