US Bridges

SR 539 over Fishtrap Creek

Good

Whatcom County, Washington · 2.7 N JCT SR 544 · Structure no. 0017469E0000000

Built
2008
17 years old
Condition
Good
inspected May 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
102 ft
1 main span
Daily traffic
7,931
2023 count
Owner
State
State Highway Agency

About this bridge

SR 539 over Fishtrap Creek is a prestressed concrete stringer/multi-beam or girder carrying SR 539 over Fishtrap Creek in Whatcom County, Washington. It was built in 2008, so it is 17 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 7,931 vehicles a day, roughly 6% of them trucks, projected to reach 12,169 by 2039. The structure is 102 ft (31.1 m) long and 84 ft wide. If it were closed, the detour would be 8.7 mi (14 km).

Location

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CarriesSR 539
CrossesFishtrap Creek
Location2.7 N JCT SR 544
RouteState Highway 539
CountyWhatcom County
StateWashington
Coordinates48.93108, -122.48547
Functional classUrban Other Principal Arterial

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.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionMay 2024
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
Deck geometry9: Superior to present desirable criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating91.9 US tons
Inventory rating54 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHL 93
Structure length102 ft (31.1 m)
Longest span100 ft (30.5 m)
Deck width84 ft (25.5 m)
Roadway width82 ft (25.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic7,931 (2023)
Projected traffic12,169 by 2039
Trucks6%
Lanes on structure4
Traffic directionOne-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$3.4 million (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was SR 539 over Fishtrap Creek built?

It was built in 2008, making it 17 years old in 2025.

What condition is SR 539 over Fishtrap 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 May 2024.

How much traffic does SR 539 over Fishtrap Creek carry?

About 7,931 vehicles per day (2023 count), of which roughly 6% are trucks.

How long is SR 539 over Fishtrap Creek?

The structure is 102 ft (31.1 m) long with a longest span of 100 ft (30.5 m) and a deck 84 ft wide.

Who owns SR 539 over Fishtrap Creek?

It is owned by the State Highway Agency.