US Bridges

Sanders RD over Carpenter Creek

Fair

Snohomish County, Washington · 8.1 E JCT SR 9 · Structure no. 082447000000000

Built
1984
41 years old, rebuilt 2009
Condition
Fair
inspected February 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
41 ft
1 main span
Daily traffic
31
2023 count
Owner
County
County Highway Agency

About this bridge

Sanders RD over Carpenter Creek is a steel stringer/multi-beam or girder carrying Sanders RD over Carpenter Creek in Snohomish County, Washington. It was built in 1984 and reconstructed in 2009, so it is 41 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.

It carries about 31 vehicles a day, roughly 21% of them trucks, projected to reach 50 by 2041. The structure is 41 ft (12.4 m) long and 12 ft wide. If it were closed, the detour would be 98.8 mi (159 km).

Location

Open in Google Maps
CarriesSanders RD
CrossesCarpenter Creek
Location8.1 E JCT SR 9
RouteCounty Highway 48650
CountySnohomish County
StateWashington
Coordinates47.98436, -121.96346
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.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionFebruary 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating39 US tons
Inventory rating30 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckWood or timber
Main spans1
Design loadUnknown
Structure length41 ft (12.4 m)
Longest span33 ft (10.1 m)
Deck width12 ft (3.7 m)
Roadway width11 ft (3.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic31 (2023)
Projected traffic50 by 2041
Trucks21%
Lanes on structure1
Traffic directionOne-lane bridge for two-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$1.3 million (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Sanders RD over Carpenter Creek built?

It was built in 1984, making it 41 years old in 2025. It was reconstructed in 2009.

What condition is Sanders 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 February 2024.

How much traffic does Sanders RD over Carpenter Creek carry?

About 31 vehicles per day (2023 count), of which roughly 21% are trucks.

How long is Sanders RD over Carpenter Creek?

The structure is 41 ft (12.4 m) long with a longest span of 33 ft (10.1 m) and a deck 12 ft wide.

Who owns Sanders RD over Carpenter Creek?

It is owned by the County Highway Agency.