US Bridges

Hemmi RD W over Ten Mile CR

Good

Whatcom County, Washington · 00.3 E. Aldrich Rd. · Structure no. 081701000000000

Built
1986
39 years old
Condition
Good
inspected February 2023
Type
Tee Beam
Prestressed Concrete
Length
80 ft
1 main span
Daily traffic
441
2021 count
Owner
County
County Highway Agency

About this bridge

Hemmi RD W over Ten Mile CR is a prestressed concrete tee beam carrying Hemmi RD W over Ten Mile CR in Whatcom County, Washington. It was built in 1986, so it is 39 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 441 vehicles a day, roughly 2% of them trucks, projected to reach 600 by 2041. The structure is 80 ft (24.4 m) long and 31 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

CarriesHemmi RD W
CrossesTen Mile CR
Location00.3 E. Aldrich Rd.
RouteCounty Highway 76320
Coordinates48.86246, -122.51418
Functional classRural Local

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 inspectionFebruary 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
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 rating70.3 US tons
Inventory rating51 US tons

Structure

Structure typeTee Beam
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length80 ft (24.4 m)
Longest span80 ft (24.4 m)
Deck width31 ft (9.4 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic441 (2021)
Projected traffic600 by 2041
Trucks2%
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$3.2 million (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Hemmi RD W over Ten Mile CR built?

It was built in 1986, making it 39 years old in 2025.

What condition is Hemmi RD W over Ten Mile 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 February 2023.

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

About 441 vehicles per day (2021 count), of which roughly 2% are trucks.

How long is Hemmi RD W over Ten Mile CR?

The structure is 80 ft (24.4 m) long with a longest span of 80 ft (24.4 m) and a deck 31 ft wide.

Who owns Hemmi RD W over Ten Mile CR?

It is owned by the County Highway Agency.