US Bridges

Old SR9 over Pilchuck CR

Fair

Snohomish County, Washington · 0.2 NE JCT SR9 · Structure no. 000000FX0000000

Built
1916
109 years old
Condition
Fair
inspected August 2024
Type
Culvert
Concrete Continuous
Length
115 ft
2 main spans
Daily traffic
63
2021 count
Owner
County
County Highway Agency

About this bridge

Old SR9 over Pilchuck CR is a concrete continuous culvert carrying Old SR9 over Pilchuck CR in Snohomish County, Washington. It was built in 1916, so it is 109 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 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 63 vehicles a day, roughly 8% of them trucks, projected to reach 150 by 2046. The structure is 115 ft (35.1 m) long and 18 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesOld SR9
CrossesPilchuck CR
Location0.2 NE JCT SR9
RouteCounty Highway 77500
CountySnohomish County
StateWashington
Coordinates48.26511, -122.16544
Functional classRural 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
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionAugust 2024
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 geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment3: Basically intolerable, requiring high priority of corrective action
Operating rating83 US tons
Inventory rating53 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans2
Design loadUnknown
Structure length115 ft (35.1 m)
Longest span60 ft (18.3 m)
Deck width18 ft (5.5 m)
Roadway width17 ft (5.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic63 (2021)
Projected traffic150 by 2046
Trucks8%
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusEligible for the National Register of Historic Places
Work proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$1.5 million (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Old SR9 over Pilchuck CR built?

It was built in 1916, making it 109 years old in 2025.

What condition is Old SR9 over Pilchuck CR 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 August 2024.

How much traffic does Old SR9 over Pilchuck CR carry?

About 63 vehicles per day (2021 count), of which roughly 8% are trucks.

How long is Old SR9 over Pilchuck CR?

The structure is 115 ft (35.1 m) long with a longest span of 60 ft (18.3 m) and a deck 18 ft wide.

Who owns Old SR9 over Pilchuck CR?

It is owned by the County Highway Agency.