US Bridges

Lake Samish DR N over Lake Samish

PoorPosted for load

Whatcom County, Washington · S End N Lk Samish · Structure no. 083637000000000

Built
1953
72 years old, rebuilt 1963
Condition
Poor
inspected March 2023
Type
Stringer/Multi-beam or Girder
Wood or Timber
Length
251 ft
5 main spans
Daily traffic
955
2021 count
Owner
County
County Highway Agency

About this bridge

Lake Samish DR N over Lake Samish is a wood or timber stringer/multi-beam or girder carrying Lake Samish DR N over Lake Samish in Whatcom County, Washington. It was built in 1953 and reconstructed in 1963, so it is 72 years old, older than the Washington average of 49.8 years.

The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 3 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. Its operating status is: posted for load restriction.

It carries about 955 vehicles a day, roughly 1% of them trucks, projected to reach 1,500 by 2043. The structure is 251 ft (76.5 m) long and 30 ft wide. If it were closed, the detour would be 6.8 mi (11 km).

CarriesLake Samish DR N
CrossesLake Samish
LocationS End N Lk Samish
RouteCounty Highway 44170
Coordinates48.67073, -122.41195
Functional classRural Minor Collector

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure3 SeriousLoss of section, deterioration, spalling or scour have seriously affected primary structural components.
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 inspectionMarch 2023
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour above top of footing
Structural evaluation2: Basically intolerable, requiring high priority of replacement
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating17 US tons
Inventory rating10 US tons

Structure

MaterialWood or Timber
DeckWood or timber
Main spans5
Design loadHS 20
Structure length251 ft (76.5 m)
Longest span100 ft (30.5 m)
Deck width30 ft (9.1 m)
Roadway width14 ft (4.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic955 (2021)
Projected traffic1,500 by 2043
Trucks1%
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed6.8 mi (11 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$6.4 million (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Lake Samish DR N over Lake Samish built?

It was built in 1953, making it 72 years old in 2025. It was reconstructed in 1963.

What condition is Lake Samish DR N over Lake Samish in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in March 2023.

How much traffic does Lake Samish DR N over Lake Samish carry?

About 955 vehicles per day (2021 count), of which roughly 1% are trucks.

How long is Lake Samish DR N over Lake Samish?

The structure is 251 ft (76.5 m) long with a longest span of 100 ft (30.5 m) and a deck 30 ft wide.

Who owns Lake Samish DR N over Lake Samish?

It is owned by the County Highway Agency.