US Bridges

Northshore RD over Smith Creek

Good

Whatcom County, Washington · 02.8 SE of Y Road · Structure no. 085798000000000

Built
1989
36 years old
Condition
Good
inspected February 2023
Type
Tee Beam
Prestressed Concrete
Length
99 ft
1 main span
Daily traffic
1,010
2021 count
Owner
County
County Highway Agency

About this bridge

Northshore RD over Smith Creek is a prestressed concrete tee beam carrying Northshore RD over Smith Creek in Whatcom County, Washington. It was built in 1989, so it is 36 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 1,010 vehicles a day, roughly 2% of them trucks, projected to reach 1,500 by 2043. The structure is 99 ft (30.2 m) long and 31 ft wide. If it were closed, the detour would be 98.8 mi (159 km).

CarriesNorthshore RD
CrossesSmith Creek
Location02.8 SE of Y Road
RouteCounty Highway 47052
Coordinates48.73189, -122.30839
Functional classRural Minor Collector

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 on dry land well above flood water elevations
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 alignment6: Equal to present minimum criteria
Operating rating60 US tons
Inventory rating44.3 US tons

Structure

Structure typeTee Beam
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length99 ft (30.2 m)
Longest span99 ft (30.2 m)
Deck width31 ft (9.3 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,010 (2021)
Projected traffic1,500 by 2043
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed98.8 mi (159 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$3.9 million (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Northshore RD over Smith Creek built?

It was built in 1989, making it 36 years old in 2025.

What condition is Northshore RD over Smith Creek 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 Northshore RD over Smith Creek carry?

About 1,010 vehicles per day (2021 count), of which roughly 2% are trucks.

How long is Northshore RD over Smith Creek?

The structure is 99 ft (30.2 m) long with a longest span of 99 ft (30.2 m) and a deck 31 ft wide.

Who owns Northshore RD over Smith Creek?

It is owned by the County Highway Agency.