US Bridges

Alderwood Mall Pkw over I-5

Good

Snohomish County, Washington · 0.6 N JCT SR 524 · Structure no. 00000KMA0000000

Built
1996
29 years old
Condition
Good
inspected June 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete Continuous
Length
509 ft
4 main spans
Daily traffic
2,635
2002 count
Owner
State
State Highway Agency

About this bridge

Alderwood Mall Pkw over I-5 is a prestressed concrete continuous stringer/multi-beam or girder carrying Alderwood Mall Pkw over I-5 in Snohomish County, Washington. It was built in 1996, so it is 29 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 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 2,635 vehicles a day, roughly 5% of them trucks, projected to reach 4,785 by 2036. The structure is 509 ft (155.1 m) long and 85 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesAlderwood Mall Pkw
CrossesI-5
Location0.6 N JCT SR 524
RouteCity Street 0
CountySnohomish County
StateWashington
Coordinates47.82703, -122.26897
Functional classUrban Minor Arterial

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 inspectionJune 2023
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 rating82 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadHS 25 or greater
Structure length509 ft (155.1 m)
Longest span151 ft (46 m)
Deck width85 ft (25.9 m)
Roadway width68 ft (20.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,635 (2002)
Projected traffic4,785 by 2036
Trucks5%
Lanes on structure6
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
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 statusHistorical significance not determinable at this time
Work proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$16.9 million (2022 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was Alderwood Mall Pkw over I-5 built?

It was built in 1996, making it 29 years old in 2025.

What condition is Alderwood Mall Pkw over I-5 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 June 2023.

How much traffic does Alderwood Mall Pkw over I-5 carry?

About 2,635 vehicles per day (2002 count), of which roughly 5% are trucks.

How long is Alderwood Mall Pkw over I-5?

The structure is 509 ft (155.1 m) long with a longest span of 151 ft (46 m) and a deck 85 ft wide.

Who owns Alderwood Mall Pkw over I-5?

It is owned by the State Highway Agency.