US Bridges

Mosquito Lk RD over Hutchinson CR

Good

Whatcom County, Washington · 03.1 E. Valley HWY · Structure no. 087391000000000

Built
2005
20 years old
Condition
Good
inspected October 2024
Type
Slab
Prestressed Concrete
Length
72 ft
1 main span
Daily traffic
818
2024 count
Owner
County
County Highway Agency

About this bridge

Mosquito Lk RD over Hutchinson CR is a prestressed concrete slab carrying Mosquito Lk RD over Hutchinson CR in Whatcom County, Washington. It was built in 2005, so it is 20 years old, younger than the Washington average of 49.8 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 818 vehicles a day, roughly 4% of them trucks, projected to reach 1,200 by 2046. The structure is 72 ft (21.9 m) long and 32 ft wide. If it were closed, the detour would be 21.1 mi (34 km).

CarriesMosquito Lk RD
CrossesHutchinson CR
Location03.1 E. Valley HWY
RouteCounty Highway 84190
Coordinates48.72889, -122.13483
Functional classRural Minor Collector

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionOctober 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation7: Better than present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating51.8 US tons
Inventory rating39.2 US tons

Structure

Structure typeSlab
MaterialPrestressed Concrete
DeckOther
Main spans1
Design loadHS 25 or greater
Structure length72 ft (21.9 m)
Longest span69 ft (21 m)
Deck width32 ft (9.8 m)
Roadway width29 ft (8.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic818 (2024)
Projected traffic1,200 by 2046
Trucks4%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed21.1 mi (34 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 million (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Mosquito Lk RD over Hutchinson CR built?

It was built in 2005, making it 20 years old in 2025.

What condition is Mosquito Lk RD over Hutchinson CR in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in October 2024.

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

About 818 vehicles per day (2024 count), of which roughly 4% are trucks.

How long is Mosquito Lk RD over Hutchinson CR?

The structure is 72 ft (21.9 m) long with a longest span of 69 ft (21 m) and a deck 32 ft wide.

Who owns Mosquito Lk RD over Hutchinson CR?

It is owned by the County Highway Agency.