US Bridges

SR 522 over 179th SE & 154th SE

Good

Snohomish County, Washington · 10.1 E JCT SR 9 · Structure no. 0018128D0000000

Built
2013
12 years old
Condition
Good
inspected May 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete Continuous
Length
342 ft
3 main spans
Daily traffic
10,785
2023 count
Owner
State
State Highway Agency

About this bridge

SR 522 over 179th SE & 154th SE is a prestressed concrete continuous stringer/multi-beam or girder carrying SR 522 over 179th SE & 154th SE in Snohomish County, Washington. It was built in 2013, so it is 12 years old, younger than the Washington average of 49.8 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 10,785 vehicles a day, roughly 8% of them trucks, projected to reach 15,208 by 2039. The structure is 342 ft (104.2 m) long and 45 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesSR 522
Crosses179th SE & 154th SE
Location10.1 E JCT SR 9
RouteState Highway 522
Coordinates47.85744, -121.99122
Functional classUrban Principal Arterial - Other Freeway or Expressway

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Last inspectionMay 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation8: Equal to present desirable criteria
Deck geometry8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating56.1 US tons
Inventory rating43.2 US tons

Structure

MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHL 93
Structure length342 ft (104.2 m)
Longest span150 ft (45.7 m)
Deck width45 ft (13.6 m)
Roadway width42 ft (12.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic10,785 (2023)
Projected traffic15,208 by 2039
Trucks8%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed1.2 mi (2 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$7.1 million (2022 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was SR 522 over 179th SE & 154th SE built?

It was built in 2013, making it 12 years old in 2025.

What condition is SR 522 over 179th SE & 154th SE in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in May 2024.

How much traffic does SR 522 over 179th SE & 154th SE carry?

About 10,785 vehicles per day (2023 count), of which roughly 8% are trucks.

How long is SR 522 over 179th SE & 154th SE?

The structure is 342 ft (104.2 m) long with a longest span of 150 ft (45.7 m) and a deck 45 ft wide.

Who owns SR 522 over 179th SE & 154th SE?

It is owned by the State Highway Agency.