US Bridges

Benson Ridge Lane over Carpenter Creek

FairPosted for load

Skagit County, Washington · 1.2 E on Stackpole · Structure no. 080152000000000

Built
1983
42 years old
Condition
Fair
inspected September 2024
Type
Girder and Floorbeam System
Wood or Timber
Length
52 ft
1 main span
Daily traffic
46
2021 count
Owner
County
County Highway Agency

About this bridge

Benson Ridge Lane over Carpenter Creek is a wood or timber girder and floorbeam system carrying Benson Ridge Lane over Carpenter Creek in Skagit County, Washington. It was built in 1983, so it is 42 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 6 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 46 vehicles a day, roughly 4% of them trucks, projected to reach 83 by 2041. The structure is 52 ft (15.9 m) long and 31 ft wide. If it were closed, the detour would be 98.8 mi (159 km).

CarriesBenson Ridge Lane
CrossesCarpenter Creek
Location1.2 E on Stackpole
RouteCounty Highway 82040
Coordinates48.37038, -122.3091
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating36.8 US tons
Inventory rating26.1 US tons

Structure

MaterialWood or Timber
DeckWood or timber
Main spans1
Design loadHS 20
Structure length52 ft (15.9 m)
Longest span47 ft (14.3 m)
Deck width31 ft (9.5 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic46 (2021)
Projected traffic83 by 2041
Trucks4%
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 proposedDeck rehabilitation with only incidental widening
Estimated improvement cost$645,000 (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Benson Ridge Lane over Carpenter Creek built?

It was built in 1983, making it 42 years old in 2025.

What condition is Benson Ridge Lane 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 September 2024.

How much traffic does Benson Ridge Lane over Carpenter Creek carry?

About 46 vehicles per day (2021 count), of which roughly 4% are trucks.

How long is Benson Ridge Lane over Carpenter Creek?

The structure is 52 ft (15.9 m) long with a longest span of 47 ft (14.3 m) and a deck 31 ft wide.

Who owns Benson Ridge Lane over Carpenter Creek?

It is owned by the County Highway Agency.