US Bridges

Ten Mile RD over Ten Mile CR

Fair

Whatcom County, Washington · 0.3 E Hannegan Rd. · Structure no. 082017000000000

Built
1934
91 years old, rebuilt 1993
Condition
Fair
inspected November 2024
Type
Channel Beam
Concrete
Length
38 ft
2 main spans
Daily traffic
372
2020 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 1934 and reconstructed in 1993, so it is 91 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 372 vehicles a day, roughly 2% of them trucks, projected to reach 500 by 2042. The structure is 38 ft (11.6 m) long and 26 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

Open in Google Maps
CarriesTen Mile RD
CrossesTen Mile CR
Location0.3 E Hannegan Rd.
RouteCounty Highway 56420
CountyWhatcom County
StateWashington
Coordinates48.86984, -122.43705
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.
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 inspectionNovember 2024
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 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 rating26.8 US tons
Inventory rating20.7 US tons

Structure

Structure typeChannel Beam
MaterialConcrete
DeckOther
Main spans2
Design loadUnknown
Structure length38 ft (11.6 m)
Longest span18 ft (5.4 m)
Deck width26 ft (7.8 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic372 (2020)
Projected traffic500 by 2042
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed5 mi (8 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$1.7 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 1934, making it 91 years old in 2025. It was reconstructed in 1993.

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 November 2024.

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

About 372 vehicles per day (2020 count), of which roughly 2% are trucks.

How long is Ten Mile RD over Ten Mile CR?

The structure is 38 ft (11.6 m) long with a longest span of 18 ft (5.4 m) and a deck 26 ft wide.

Who owns Ten Mile RD over Ten Mile CR?

It is owned by the County Highway Agency.