US Bridges

SR 539 over Nooksack R Overflow

Good

Whatcom County, Washington · 2.5 N JCT SR 544 · Structure no. 0017469F0000000

Built
2009
16 years old
Condition
Good
inspected May 2024
Type
Culvert
Concrete
Length
25 ft
1 main span
Daily traffic
15,862
2023 count
Owner
State
State Highway Agency

About this bridge

SR 539 over Nooksack R Overflow is a concrete culvert carrying SR 539 over Nooksack R Overflow in Whatcom County, Washington. It was built in 2009, so it is 16 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 15,862 vehicles a day, roughly 6% of them trucks, projected to reach 24,337 by 2039. The structure is 25 ft (7.6 m) long. If it were closed, the detour would be 8.7 mi (14 km).

Location

Open in Google Maps
CarriesSR 539
CrossesNooksack R Overflow
Location2.5 N JCT SR 544
RouteState Highway 539
CountyWhatcom County
StateWashington
Coordinates48.92783, -122.4855
Functional classRural Principal Arterial - Other

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Channel and channel protection8 Very GoodNo problems noted.
Culvert7 GoodSome minor problems.
Last inspectionMay 2024
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating71 US tons
Inventory rating43 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans1
Design loadHL 93
Structure length25 ft (7.6 m)
Longest span25 ft (7.6 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic15,862 (2023)
Projected traffic24,337 by 2039
Trucks6%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed8.7 mi (14 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$1.4 million (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was SR 539 over Nooksack R Overflow built?

It was built in 2009, making it 16 years old in 2025.

What condition is SR 539 over Nooksack R Overflow 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 May 2024.

How much traffic does SR 539 over Nooksack R Overflow carry?

About 15,862 vehicles per day (2023 count), of which roughly 6% are trucks.

How long is SR 539 over Nooksack R Overflow?

The structure is 25 ft (7.6 m) long with a longest span of 25 ft (7.6 m).

Who owns SR 539 over Nooksack R Overflow?

It is owned by the State Highway Agency.