US Bridges

Lk Cavanaugh Road over Pilchuck Creek

FairPosted for load

Skagit County, Washington · 8.7 E JCT SR 9 · Structure no. 082269000000000

Built
1970
55 years old
Condition
Fair
inspected August 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
56 ft
1 main span
Daily traffic
578
2021 count
Owner
County
County Highway Agency

About this bridge

Lk Cavanaugh Road over Pilchuck Creek is a prestressed concrete stringer/multi-beam or girder carrying Lk Cavanaugh Road over Pilchuck Creek in Skagit County, Washington. It was built in 1970, so it is 55 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. Its operating status is: posted for load restriction.

It carries about 578 vehicles a day, roughly 10% of them trucks, projected to reach 859 by 2041. The structure is 56 ft (17.2 m) long and 30 ft wide. If it were closed, the detour would be 98.8 mi (159 km).

CarriesLk Cavanaugh Road
CrossesPilchuck Creek
Location8.7 E JCT SR 9
RouteCounty Highway 200
Coordinates48.34301, -122.05635
Functional classRural Minor Collector

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionAugust 2024
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating25 US tons
Inventory rating15 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length56 ft (17.2 m)
Longest span54 ft (16.6 m)
Deck width30 ft (9.1 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic578 (2021)
Projected traffic859 by 2041
Trucks10%
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$2.4 million (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Lk Cavanaugh Road over Pilchuck Creek built?

It was built in 1970, making it 55 years old in 2025.

What condition is Lk Cavanaugh Road over 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 August 2024.

How much traffic does Lk Cavanaugh Road over Pilchuck Creek carry?

About 578 vehicles per day (2021 count), of which roughly 10% are trucks.

How long is Lk Cavanaugh Road over Pilchuck Creek?

The structure is 56 ft (17.2 m) long with a longest span of 54 ft (16.6 m) and a deck 30 ft wide.

Who owns Lk Cavanaugh Road over Pilchuck Creek?

It is owned by the County Highway Agency.