US Bridges

SR 522 over 179th SE & 154th SE

Good

Snohomish County, Washington · 10.1 E JCT SR 9 · Structure no. 0008761B0000000

Built
1970
55 years old
Condition
Good
inspected May 2024
Type
Box Beam or Girders - Multiple
Prestressed Concrete Continuous
Length
346 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 box beam or girders - multiple carrying SR 522 over 179th SE & 154th SE in Snohomish 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 good condition with a lowest component rating of 7 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 346 ft (105.5 m) long and 41 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
Coordinates47.85731, -121.99114
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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Last inspectionMay 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating46 US tons
Inventory rating27 US tons

Structure

MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20 + Mod
Structure length346 ft (105.5 m)
Longest span170 ft (51.8 m)
Deck width41 ft (12.6 m)
Roadway width38 ft (11.6 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 statusPossibly eligible for the National Register; requires further investigation
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 1970, making it 55 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 346 ft (105.5 m) long with a longest span of 170 ft (51.8 m) and a deck 41 ft wide.

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

It is owned by the State Highway Agency.