US Bridges

Ten Mile RD over Ten Mile CR Trib

Fair

Whatcom County, Washington · 00.2 E Guide Meridi · Structure no. 082338000000000

Built
1900
125 years old, rebuilt 1994
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 Trib is a concrete channel beam carrying Ten Mile RD over Ten Mile CR Trib in Whatcom County, Washington. It was built in 1900 and reconstructed in 1994, so it is 125 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 Trib
Location00.2 E Guide Meridi
RouteCounty Highway 56420
CountyWhatcom County
StateWashington
Coordinates48.87, -122.48
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
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 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 rating32 US tons
Inventory rating23 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 Trib built?

It was built in 1900, making it 125 years old in 2025. It was reconstructed in 1994.

What condition is Ten Mile RD over Ten Mile CR Trib 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 Trib carry?

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

How long is Ten Mile RD over Ten Mile CR Trib?

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 Trib?

It is owned by the County Highway Agency.