US Bridges

Stanwood-Bryant RD over Pilchuck Creek

Good

Snohomish County, Washington · 2.0 E JCT I-5 · Structure no. 086204000000000

Built
1996
29 years old
Condition
Good
inspected August 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
280 ft
2 main spans
Daily traffic
4,922
2023 count
Owner
County
County Highway Agency

About this bridge

Stanwood-Bryant RD over Pilchuck Creek is a prestressed concrete stringer/multi-beam or girder carrying Stanwood-Bryant RD over Pilchuck Creek 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 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 4,922 vehicles a day, roughly 15% of them trucks, projected to reach 5,000 by 2044. The structure is 280 ft (85.3 m) long and 37 ft wide. If it were closed, the detour would be 11.8 mi (19 km).

CarriesStanwood-Bryant RD
CrossesPilchuck Creek
Location2.0 E JCT I-5
RouteCounty Highway 97911
Coordinates48.23889, -122.20556
Functional classRural Major Collector

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure8 Very GoodNo problems noted.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionAugust 2024
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 geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating110.1 US tons
Inventory rating68 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans2
Design loadHS 25 or greater
Structure length280 ft (85.3 m)
Longest span137 ft (41.9 m)
Deck width37 ft (11.3 m)
Roadway width34 ft (10.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,922 (2023)
Projected traffic5,000 by 2044
Trucks15%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed11.8 mi (19 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$10.5 million (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Stanwood-Bryant RD over Pilchuck Creek built?

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

What condition is Stanwood-Bryant RD over 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 August 2024.

How much traffic does Stanwood-Bryant RD over Pilchuck Creek carry?

About 4,922 vehicles per day (2023 count), of which roughly 15% are trucks.

How long is Stanwood-Bryant RD over Pilchuck Creek?

The structure is 280 ft (85.3 m) long with a longest span of 137 ft (41.9 m) and a deck 37 ft wide.

Who owns Stanwood-Bryant RD over Pilchuck Creek?

It is owned by the County Highway Agency.