US Bridges

Cedardale RD over Carpenter Creek

FairPosted for load

Skagit County, Washington · 0.75 S JCT SR 534 · Structure no. 083985000000000

Built
1934
91 years old
Condition
Fair
inspected August 2024
Type
Stringer/Multi-beam or Girder
Wood or Timber
Length
84 ft
4 main spans
Daily traffic
613
2022 count
Owner
County
County Highway Agency

About this bridge

Cedardale RD over Carpenter Creek is a wood or timber stringer/multi-beam or girder carrying Cedardale RD over Carpenter Creek in Skagit County, Washington. It was built in 1934, so it is 91 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 613 vehicles a day, roughly 14% of them trucks, projected to reach 911 by 2042. The structure is 84 ft (25.6 m) long and 38 ft wide. If it were closed, the detour would be 5 mi (8 km).

CarriesCedardale RD
CrossesCarpenter Creek
Location0.75 S JCT SR 534
RouteCounty Highway 70550
Coordinates48.32384, -122.32831
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.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection8 Very GoodNo problems noted.
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 geometry7: Better than present minimum criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating35.4 US tons
Inventory rating15.8 US tons

Structure

MaterialWood or Timber
DeckConcrete, cast-in-place
Main spans4
Design loadH 15
Structure length84 ft (25.6 m)
Longest span31 ft (9.4 m)
Deck width38 ft (11.6 m)
Roadway width36 ft (11 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic613 (2022)
Projected traffic911 by 2042
Trucks14%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed5 mi (8 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$3.4 million (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Cedardale RD over Carpenter Creek built?

It was built in 1934, making it 91 years old in 2025.

What condition is Cedardale RD over Carpenter 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 Cedardale RD over Carpenter Creek carry?

About 613 vehicles per day (2022 count), of which roughly 14% are trucks.

How long is Cedardale RD over Carpenter Creek?

The structure is 84 ft (25.6 m) long with a longest span of 31 ft (9.4 m) and a deck 38 ft wide.

Who owns Cedardale RD over Carpenter Creek?

It is owned by the County Highway Agency.