US Bridges

84th ST NE over Little Pilchuck Creek

Good

Snohomish County, Washington · 1.1 W JCT SR 92 · Structure no. 087408000000000

Built
2006
19 years old
Condition
Good
inspected July 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
34 ft
1 main span
Daily traffic
10,540
2022 count
Owner
County
County Highway Agency

About this bridge

84th ST NE over Little Pilchuck Creek is a steel stringer/multi-beam or girder carrying 84th ST NE over Little Pilchuck Creek in Snohomish County, Washington. It was built in 2006, so it is 19 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 10,540 vehicles a day, roughly 16% of them trucks, projected to reach 12,000 by 2045. The structure is 34 ft (10.3 m) long and 31 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Carries84th ST NE
CrossesLittle Pilchuck Creek
Location1.1 W JCT SR 92
RouteCounty Highway 96857
Coordinates48.07235, -122.02908
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
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionJuly 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
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating85.3 US tons
Inventory rating52.9 US tons

Structure

MaterialSteel
DeckConcrete, precast panels
Main spans1
Design loadHS 25 or greater
Structure length34 ft (10.3 m)
Longest span28 ft (8.4 m)
Deck width31 ft (9.6 m)
Roadway width28 ft (8.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic10,540 (2022)
Projected traffic12,000 by 2045
Trucks16%
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 proposedWidening of existing bridge without deck rehabilitation
Estimated improvement cost$528,000 (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was 84th ST NE over Little Pilchuck Creek built?

It was built in 2006, making it 19 years old in 2025.

What condition is 84th ST NE over Little Pilchuck Creek 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 July 2023.

How much traffic does 84th ST NE over Little Pilchuck Creek carry?

About 10,540 vehicles per day (2022 count), of which roughly 16% are trucks.

How long is 84th ST NE over Little Pilchuck Creek?

The structure is 34 ft (10.3 m) long with a longest span of 28 ft (8.4 m) and a deck 31 ft wide.

Who owns 84th ST NE over Little Pilchuck Creek?

It is owned by the County Highway Agency.