US Bridges

88th ST SE over Pilchuck R. Overflow

Good

Snohomish County, Washington · 0.1 SW Int SR2 · Structure no. 086357000000000

Built
1986
39 years old
Condition
Good
inspected May 2023
Type
Culvert
Steel
Length
53 ft
4 main spans
Daily traffic
13,397
2019 count
Owner
County
County Highway Agency

About this bridge

88th ST SE over Pilchuck R. Overflow is a steel culvert carrying 88th ST SE over Pilchuck R. Overflow in Snohomish County, Washington. It was built in 1986, so it is 39 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 13,397 vehicles a day, roughly 12% of them trucks, projected to reach 20,000 by 2045. The structure is 53 ft (16.2 m) long. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
Carries88th ST SE
CrossesPilchuck R. Overflow
Location0.1 SW Int SR2
RouteCounty Highway 46440
CountySnohomish County
StateWashington
Coordinates47.91375, -122.07569
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
Channel and channel protection7 GoodSome minor problems.
Culvert7 GoodSome minor problems.
Last inspectionMay 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating110.1 US tons
Inventory rating110.1 US tons

Structure

Structure typeCulvert
MaterialSteel
DeckNot applicable
Main spans4
Design loadUnknown
Structure length53 ft (16.2 m)
Longest span10 ft (3 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic13,397 (2019)
Projected traffic20,000 by 2045
Trucks12%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$2.3 million (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was 88th ST SE over Pilchuck R. Overflow built?

It was built in 1986, making it 39 years old in 2025.

What condition is 88th ST SE over Pilchuck R. Overflow 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 May 2023.

How much traffic does 88th ST SE over Pilchuck R. Overflow carry?

About 13,397 vehicles per day (2019 count), of which roughly 12% are trucks.

How long is 88th ST SE over Pilchuck R. Overflow?

The structure is 53 ft (16.2 m) long with a longest span of 10 ft (3 m).

Who owns 88th ST SE over Pilchuck R. Overflow?

It is owned by the County Highway Agency.