US Bridges

Aldrich RD over Ten Mile Cr.

FairPosted for load

Whatcom County, Washington · 0.2 S W Hemmi RD · Structure no. 083087000000000

Built
1924
101 years old, rebuilt 1990
Condition
Fair
inspected April 2024
Type
Channel Beam
Concrete
Length
38 ft
2 main spans
Daily traffic
1,192
2024 count
Owner
County
County Highway Agency

About this bridge

Aldrich RD over Ten Mile Cr. is a concrete channel beam carrying Aldrich RD over Ten Mile Cr. in Whatcom County, Washington. It was built in 1924 and reconstructed in 1990, so it is 101 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. Its operating status is: posted for load restriction.

It carries about 1,192 vehicles a day, roughly 2% of them trucks, projected to reach 1,450 by 2040. The structure is 38 ft (11.6 m) long and 26 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesAldrich RD
CrossesTen Mile Cr.
Location0.2 S W Hemmi RD
RouteCounty Highway 73750
CountyWhatcom County
StateWashington
Coordinates48.86133, -122.51919
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 2024
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 geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating20.7 US tons
Inventory rating16.1 US tons

Structure

Structure typeChannel Beam
MaterialConcrete
DeckOther
Main spans2
Design loadH 20
Structure length38 ft (11.6 m)
Longest span18 ft (5.4 m)
Deck width26 ft (7.9 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,192 (2024)
Projected traffic1,450 by 2040
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 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$1.7 million (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Aldrich RD over Ten Mile Cr. built?

It was built in 1924, making it 101 years old in 2025. It was reconstructed in 1990.

What condition is Aldrich 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 2024.

How much traffic does Aldrich RD over Ten Mile Cr. carry?

About 1,192 vehicles per day (2024 count), of which roughly 2% are trucks.

How long is Aldrich 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 Aldrich RD over Ten Mile Cr.?

It is owned by the County Highway Agency.