US Bridges

River RD over Fish Trap Creek

GoodPosted for load

Whatcom County, Washington · 01.2 SW Flynn Road · Structure no. 087232000000000

Built
2004
21 years old
Condition
Good
inspected January 2023
Type
Channel Beam
Concrete
Length
50 ft
2 main spans
Daily traffic
140
2023 count
Owner
County
County Highway Agency

About this bridge

River RD over Fish Trap Creek is a concrete channel beam carrying River RD over Fish Trap Creek in Whatcom County, Washington. It was built in 2004, so it is 21 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. Its operating status is: posted for load restriction.

It carries about 140 vehicles a day, roughly 7% of them trucks, projected to reach 160 by 2045. The structure is 50 ft (15.2 m) long and 24 ft wide. If it were closed, the detour would be 98.8 mi (159 km).

CarriesRiver RD
CrossesFish Trap Creek
Location01.2 SW Flynn Road
RouteCounty Highway 31420
Coordinates48.91396, -122.52101
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 inspectionJanuary 2023
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating25 US tons
Inventory rating19.3 US tons

Structure

Structure typeChannel Beam
MaterialConcrete
DeckOther
Main spans2
Design loadHS 20
Structure length50 ft (15.2 m)
Longest span31 ft (9.4 m)
Deck width24 ft (7.3 m)
Roadway width21 ft (6.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic140 (2023)
Projected traffic160 by 2045
Trucks7%
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 statusHistorical significance not determinable at this time
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$2.2 million (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was River RD over Fish Trap Creek built?

It was built in 2004, making it 21 years old in 2025.

What condition is River RD over Fish Trap 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 January 2023.

How much traffic does River RD over Fish Trap Creek carry?

About 140 vehicles per day (2023 count), of which roughly 7% are trucks.

How long is River RD over Fish Trap Creek?

The structure is 50 ft (15.2 m) long with a longest span of 31 ft (9.4 m) and a deck 24 ft wide.

Who owns River RD over Fish Trap Creek?

It is owned by the County Highway Agency.