US Bridges

88th ST NE over I-5

Fair

Snohomish County, Washington · 1.6 N JCT SR 528 · Structure no. 0014655A0000000

Built
1996
29 years old
Condition
Fair
inspected October 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete Continuous
Length
215 ft
2 main spans
Daily traffic
26,682
2010 count
Owner
State
State Highway Agency

About this bridge

88th ST NE over I-5 is a prestressed concrete continuous stringer/multi-beam or girder carrying 88th ST NE 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 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 26,682 vehicles a day, roughly 5% of them trucks, projected to reach 43,332 by 2036. The structure is 215 ft (65.5 m) long and 78 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
Carries88th ST NE
CrossesI-5
Location1.6 N JCT SR 528
RouteCounty Highway 0
CountySnohomish County
StateWashington
Coordinates48.07569, -122.1853
Functional classUrban Minor Arterial

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Last inspectionOctober 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating98 US tons
Inventory rating59 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 25 or greater
Structure length215 ft (65.5 m)
Longest span105 ft (32 m)
Deck width78 ft (23.9 m)
Roadway width71 ft (21.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic26,682 (2010)
Projected traffic43,332 by 2036
Trucks5%
Lanes on structure5
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesHighway
Detour if closed1.9 mi (3 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$6.7 million (2022 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was 88th ST NE over I-5 built?

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

What condition is 88th ST NE over I-5 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 2023.

How much traffic does 88th ST NE over I-5 carry?

About 26,682 vehicles per day (2010 count), of which roughly 5% are trucks.

How long is 88th ST NE over I-5?

The structure is 215 ft (65.5 m) long with a longest span of 105 ft (32 m) and a deck 78 ft wide.

Who owns 88th ST NE over I-5?

It is owned by the State Highway Agency.