US Bridges

Northwest DR over Ten Mile CR

FairPosted for load

Whatcom County, Washington · 0.1 S of Laurel RD · Structure no. 082981000000000

Built
1935
90 years old, rebuilt 1956
Condition
Fair
inspected January 2023
Type
Slab
Concrete
Length
83 ft
4 main spans
Daily traffic
4,900
2023 count
Owner
County
County Highway Agency

About this bridge

Northwest DR over Ten Mile CR is a concrete slab carrying Northwest DR over Ten Mile CR in Whatcom County, Washington. It was built in 1935 and reconstructed in 1956, so it is 90 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. Its operating status is: posted for load restriction.

It carries about 4,900 vehicles a day, roughly 4% of them trucks, projected to reach 6,500 by 2045. The structure is 83 ft (25.3 m) long and 43 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesNorthwest DR
CrossesTen Mile CR
Location0.1 S of Laurel RD
RouteCounty Highway 74050
CountyWhatcom County
StateWashington
Coordinates48.85418, -122.54099
Functional classRural Major 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.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionJanuary 2023
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourUnknown foundation; not evaluated for scour
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating23.9 US tons
Inventory rating18.5 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans4
Design loadHS 15
Structure length83 ft (25.3 m)
Longest span22 ft (6.7 m)
Deck width43 ft (13.2 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,900 (2023)
Projected traffic6,500 by 2045
Trucks4%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 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$3.4 million (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Northwest DR over Ten Mile CR built?

It was built in 1935, making it 90 years old in 2025. It was reconstructed in 1956.

What condition is Northwest DR over Ten Mile 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 January 2023.

How much traffic does Northwest DR over Ten Mile CR carry?

About 4,900 vehicles per day (2023 count), of which roughly 4% are trucks.

How long is Northwest DR over Ten Mile CR?

The structure is 83 ft (25.3 m) long with a longest span of 22 ft (6.7 m) and a deck 43 ft wide.

Who owns Northwest DR over Ten Mile CR?

It is owned by the County Highway Agency.