US Bridges

236th ST NE over I-5

Fair

Snohomish County, Washington · 1.6 N JCT SR 530 · Structure no. 0009130A0000000

Built
1975
50 years old
Condition
Fair
inspected July 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete Continuous
Length
270 ft
2 main spans
Daily traffic
5,286
2020 count
Owner
State
State Highway Agency

About this bridge

236th ST NE over I-5 is a prestressed concrete continuous stringer/multi-beam or girder carrying 236th ST NE over I-5 in Snohomish County, Washington. It was built in 1975, so it is 50 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 5,286 vehicles a day, roughly 5% of them trucks, projected to reach 8,330 by 2040. The structure is 270 ft (82.3 m) long and 41 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

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Carries236th ST NE
CrossesI-5
Location1.6 N JCT SR 530
RouteCounty Highway 0
CountySnohomish County
StateWashington
Coordinates48.20986, -122.21658
Functional classRural Minor Collector

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.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating30.3 US tons
Inventory rating23.6 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20 + Mod
Structure length270 ft (82.3 m)
Longest span133 ft (40.4 m)
Deck width41 ft (12.6 m)
Roadway width38 ft (11.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5,286 (2020)
Projected traffic8,330 by 2040
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed3.1 mi (5 km)
TollOn a free road
National Highway SystemYes

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$5.1 million (2022 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was 236th ST NE over I-5 built?

It was built in 1975, making it 50 years old in 2025.

What condition is 236th 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 July 2023.

How much traffic does 236th ST NE over I-5 carry?

About 5,286 vehicles per day (2020 count), of which roughly 5% are trucks.

How long is 236th ST NE over I-5?

The structure is 270 ft (82.3 m) long with a longest span of 133 ft (40.4 m) and a deck 41 ft wide.

Who owns 236th ST NE over I-5?

It is owned by the State Highway Agency.