US Bridges

12th ST NE over Little Pilchuck Creek

Fair

Snohomish County, Washington · 2.0 S JCT SR 92 · Structure no. 081976000000000

Built
1985
40 years old
Condition
Fair
inspected September 2023
Type
Stringer/Multi-beam or Girder
Wood or Timber
Length
30 ft
1 main span
Daily traffic
27
2019 count
Owner
County
County Highway Agency

About this bridge

12th ST NE over Little Pilchuck Creek is a wood or timber stringer/multi-beam or girder carrying 12th ST NE over Little Pilchuck Creek in Snohomish County, Washington. It was built in 1985, so it is 40 years old, younger 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 5 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 27 vehicles a day, roughly 20% of them trucks, projected to reach 75 by 2045. The structure is 30 ft (9.2 m) long and 20 ft wide. If it were closed, the detour would be 98.8 mi (159 km).

Location

Open in Google Maps
Carries12th ST NE
CrossesLittle Pilchuck Creek
Location2.0 S JCT SR 92
RouteCounty Highway 43640
CountySnohomish County
StateWashington
Coordinates48.00769, -122.04624
Functional classUrban Local

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.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
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 rating44 US tons
Inventory rating30 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialWood or Timber
DeckWood or timber
Main spans1
Design loadHS 15
Structure length30 ft (9.2 m)
Longest span28 ft (8.6 m)
Deck width20 ft (6.1 m)
Roadway width19 ft (5.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic27 (2019)
Projected traffic75 by 2045
Trucks20%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed98.8 mi (159 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$1.4 million (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was 12th ST NE over Little Pilchuck Creek built?

It was built in 1985, making it 40 years old in 2025.

What condition is 12th ST NE over Little Pilchuck Creek 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 2023.

How much traffic does 12th ST NE over Little Pilchuck Creek carry?

About 27 vehicles per day (2019 count), of which roughly 20% are trucks.

How long is 12th ST NE over Little Pilchuck Creek?

The structure is 30 ft (9.2 m) long with a longest span of 28 ft (8.6 m) and a deck 20 ft wide.

Who owns 12th ST NE over Little Pilchuck Creek?

It is owned by the County Highway Agency.