US Bridges

I-5 over Ebey Sl / SR 529 / RR

Fair

Snohomish County, Washington · 4.7 N JCT US 2 · Structure no. 0004196A0000000

Built
1954
71 years old, rebuilt 1968
Condition
Fair
inspected September 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
1,920 ft
3 main spans
Daily traffic
64,989
2023 count
Owner
State
State Highway Agency

About this bridge

I-5 over Ebey Sl / SR 529 / RR is a steel continuous stringer/multi-beam or girder carrying I-5 over Ebey Sl / SR 529 / RR in Snohomish County, Washington. It was built in 1954 and reconstructed in 1968, so it is 71 years old, older 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 64,989 vehicles a day, roughly 6% of them trucks, projected to reach 95,649 by 2039. The structure is 1,920 ft (585.2 m) long and 65 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesI-5
CrossesEbey Sl / SR 529 / RR
Location4.7 N JCT US 2
RouteInterstate 5
CountySnohomish County
StateWashington
Coordinates48.04339, -122.18086
Functional classUrban Principal Arterial - Interstate

Condition and inspection

Fair

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

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating46 US tons
Inventory rating27 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3 (+25 approach)
Design loadHS 20
Structure length1,920 ft (585.2 m)
Longest span124 ft (37.8 m)
Deck width65 ft (19.9 m)
Roadway width54 ft (16.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic64,989 (2023)
Projected traffic95,649 by 2039
Trucks6%
Lanes on structure4
Traffic directionOne-way traffic
CarriesHighway and pedestrian
CrossesHighway, waterway and railroad
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkInterstate STRAHNET route

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$49.2 million (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was I-5 over Ebey Sl / SR 529 / RR built?

It was built in 1954, making it 71 years old in 2025. It was reconstructed in 1968.

What condition is I-5 over Ebey Sl / SR 529 / RR 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 September 2024.

How much traffic does I-5 over Ebey Sl / SR 529 / RR carry?

About 64,989 vehicles per day (2023 count), of which roughly 6% are trucks.

How long is I-5 over Ebey Sl / SR 529 / RR?

The structure is 1,920 ft (585.2 m) long with a longest span of 124 ft (37.8 m) and a deck 65 ft wide.

Who owns I-5 over Ebey Sl / SR 529 / RR?

It is owned by the State Highway Agency.