US Bridges

Nooksack RD over Johnson CR

Good

Whatcom County, Washington · 0.27 N Clearbrook · Structure no. 087218000000000

Built
1996
29 years old
Condition
Good
inspected October 2024
Type
Slab
Prestressed Concrete
Length
53 ft
1 main span
Daily traffic
10
2024 count
Owner
County
County Highway Agency

About this bridge

Nooksack RD over Johnson CR is a prestressed concrete slab carrying Nooksack RD over Johnson CR in Whatcom County, Washington. It was built in 1996, so it is 29 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 10 vehicles a day, roughly 1% of them trucks, projected to reach 60 by 2042. The structure is 53 ft (16.2 m) long and 20 ft wide. If it were closed, the detour would be 98.8 mi (159 km).

CarriesNooksack RD
CrossesJohnson CR
Location0.27 N Clearbrook
RouteCounty Highway 63440
Coordinates48.98242, -122.30869
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 inspectionOctober 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation7: Better than present minimum criteria
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating57.1 US tons
Inventory rating43.5 US tons

Structure

Structure typeSlab
MaterialPrestressed Concrete
DeckOther
Main spans1
Design loadHS 25 or greater
Structure length53 ft (16.2 m)
Longest span52 ft (15.8 m)
Deck width20 ft (6.1 m)
Roadway width17 ft (5.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic10 (2024)
Projected traffic60 by 2042
Trucks1%
Lanes on structure1
Traffic directionOne-lane bridge for two-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 statusHistorical significance not determinable at this time
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$1.6 million (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Nooksack RD over Johnson CR built?

It was built in 1996, making it 29 years old in 2025.

What condition is Nooksack RD over Johnson 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 October 2024.

How much traffic does Nooksack RD over Johnson CR carry?

About 10 vehicles per day (2024 count), of which roughly 1% are trucks.

How long is Nooksack RD over Johnson CR?

The structure is 53 ft (16.2 m) long with a longest span of 52 ft (15.8 m) and a deck 20 ft wide.

Who owns Nooksack RD over Johnson CR?

It is owned by the County Highway Agency.