US Bridges

Mosquito Lk RD over Canyon CR

Fair

Whatcom County, Washington · 00.1 S E Canyon Lk. · Structure no. 084762000000000

Built
1937
88 years old, rebuilt 1958
Condition
Fair
inspected February 2023
Type
Slab
Concrete
Length
80 ft
3 main spans
Daily traffic
418
2023 count
Owner
County
County Highway Agency

About this bridge

Mosquito Lk RD over Canyon CR is a concrete slab carrying Mosquito Lk RD over Canyon CR in Whatcom County, Washington. It was built in 1937 and reconstructed in 1958, so it is 88 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.

It carries about 418 vehicles a day, roughly 16% of them trucks, projected to reach 1,000 by 2045. The structure is 80 ft (24.4 m) long and 27 ft wide. If it were closed, the detour would be 23 mi (37 km).

Location

Open in Google Maps
CarriesMosquito Lk RD
CrossesCanyon CR
Location00.1 S E Canyon Lk.
RouteCounty Highway 84190
CountyWhatcom County
StateWashington
Coordinates48.83372, -122.13629
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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
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 inspectionFebruary 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourUnknown foundation; not evaluated for scour
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating45 US tons
Inventory rating27 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 15
Structure length80 ft (24.4 m)
Longest span63 ft (19.2 m)
Deck width27 ft (8.2 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic418 (2023)
Projected traffic1,000 by 2045
Trucks16%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed23 mi (37 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$3.2 million (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Mosquito Lk RD over Canyon CR built?

It was built in 1937, making it 88 years old in 2025. It was reconstructed in 1958.

What condition is Mosquito Lk RD over Canyon CR 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 2023.

How much traffic does Mosquito Lk RD over Canyon CR carry?

About 418 vehicles per day (2023 count), of which roughly 16% are trucks.

How long is Mosquito Lk RD over Canyon CR?

The structure is 80 ft (24.4 m) long with a longest span of 63 ft (19.2 m) and a deck 27 ft wide.

Who owns Mosquito Lk RD over Canyon CR?

It is owned by the County Highway Agency.