US Bridges

Ten Mile RD over Ten Mile CR

Fair

Whatcom County, Washington · 00.2 W Chasteen Rd. · Structure no. 082339000000000

Built
1947
78 years old, rebuilt 1996
Condition
Fair
inspected April 2023
Type
Channel Beam
Concrete
Length
31 ft
1 main span
Daily traffic
841
2021 count
Owner
County
County Highway Agency

About this bridge

Ten Mile RD over Ten Mile CR is a concrete channel beam carrying Ten Mile RD over Ten Mile CR in Whatcom County, Washington. It was built in 1947 and reconstructed in 1996, so it is 78 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 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 841 vehicles a day, roughly 2% of them trucks, projected to reach 1,200 by 2043. The structure is 31 ft (9.4 m) long and 26 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesTen Mile RD
CrossesTen Mile CR
Location00.2 W Chasteen Rd.
RouteCounty Highway 56420
CountyWhatcom County
StateWashington
Coordinates48.87167, -122.465
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
Deck7 GoodSome minor problems.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionApril 2023
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 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 rating38 US tons
Inventory rating27 US tons

Structure

Structure typeChannel Beam
MaterialConcrete
DeckOther
Main spans1
Design loadHS 20
Structure length31 ft (9.4 m)
Longest span30 ft (9.1 m)
Deck width26 ft (7.8 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic841 (2021)
Projected traffic1,200 by 2043
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 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$1.5 million (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Ten Mile RD over Ten Mile CR built?

It was built in 1947, making it 78 years old in 2025. It was reconstructed in 1996.

What condition is Ten Mile RD 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 April 2023.

How much traffic does Ten Mile RD over Ten Mile CR carry?

About 841 vehicles per day (2021 count), of which roughly 2% are trucks.

How long is Ten Mile RD over Ten Mile CR?

The structure is 31 ft (9.4 m) long with a longest span of 30 ft (9.1 m) and a deck 26 ft wide.

Who owns Ten Mile RD over Ten Mile CR?

It is owned by the County Highway Agency.