US Bridges

Alderwood Mall Blv over SR 524/196th ST SW

Poor

Snohomish County, Washington · 1.6 E JCT SR 99 · Structure no. 002003680000000

Built
1999
26 years old
Condition
Poor
inspected July 2024
Type
Box Beam or Girders - Multiple
Prestressed Concrete Continuous
Length
356 ft
3 main spans
Daily traffic
19,198
2004 count
Owner
State
State Highway Agency

About this bridge

Alderwood Mall Blv over SR 524/196th ST SW is a prestressed concrete continuous box beam or girders - multiple carrying Alderwood Mall Blv over SR 524/196th ST SW in Snohomish County, Washington. It was built in 1999, so it is 26 years old, younger than the Washington average of 49.8 years.

The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

It carries about 19,198 vehicles a day, roughly 5% of them trucks, projected to reach 33,942 by 2036. The structure is 356 ft (108.5 m) long and 61 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesAlderwood Mall Blv
CrossesSR 524/196th ST SW
Location1.6 E JCT SR 99
RouteCity Street 0
Coordinates47.82067, -122.28153
Functional classUrban Collector

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck4 PoorAdvanced section loss, deterioration, spalling or scour.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Last inspectionJuly 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry2: Basically intolerable, requiring high priority of replacement
Approach roadway alignment8: Equal to present desirable criteria
Operating rating99 US tons
Inventory rating83 US tons

Structure

MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 25 or greater
Structure length356 ft (108.5 m)
Longest span269 ft (82 m)
Deck width61 ft (18.7 m)
Roadway width48 ft (14.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic19,198 (2004)
Projected traffic33,942 by 2036
Trucks5%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemNo

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$8.5 million (2022 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was Alderwood Mall Blv over SR 524/196th ST SW built?

It was built in 1999, making it 26 years old in 2025.

What condition is Alderwood Mall Blv over SR 524/196th ST SW in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in July 2024.

How much traffic does Alderwood Mall Blv over SR 524/196th ST SW carry?

About 19,198 vehicles per day (2004 count), of which roughly 5% are trucks.

How long is Alderwood Mall Blv over SR 524/196th ST SW?

The structure is 356 ft (108.5 m) long with a longest span of 269 ft (82 m) and a deck 61 ft wide.

Who owns Alderwood Mall Blv over SR 524/196th ST SW?

It is owned by the State Highway Agency.