US Bridges

Northwood RD over Fish Trap CR

Good

Whatcom County, Washington · 00.2 S E Boundary · Structure no. 084593000000000

Built
1950
75 years old, rebuilt 1993
Condition
Good
inspected September 2024
Type
Channel Beam
Concrete
Length
31 ft
1 main span
Daily traffic
300
2020 count
Owner
County
County Highway Agency

About this bridge

Northwood RD over Fish Trap CR is a concrete channel beam carrying Northwood RD over Fish Trap CR in Whatcom County, Washington. It was built in 1950 and reconstructed in 1993, so it is 75 years old, older 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 300 vehicles a day, roughly 4% of them trucks, projected to reach 600 by 2042. The structure is 31 ft (9.4 m) long and 27 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

Open in Google Maps
CarriesNorthwood RD
CrossesFish Trap CR
Location00.2 S E Boundary
RouteCounty Highway 61630
CountyWhatcom County
StateWashington
Coordinates49.00054, -122.4077
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 inspectionSeptember 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 geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating51 US tons
Inventory rating33 US tons

Structure

Structure typeChannel Beam
MaterialConcrete
DeckOther
Main spans1
Design loadH 20
Structure length31 ft (9.4 m)
Longest span30 ft (9.1 m)
Deck width27 ft (8.2 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic300 (2020)
Projected traffic600 by 2042
Trucks4%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed5 mi (8 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$1.5 million (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Northwood RD over Fish Trap CR built?

It was built in 1950, making it 75 years old in 2025. It was reconstructed in 1993.

What condition is Northwood RD over Fish Trap 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 September 2024.

How much traffic does Northwood RD over Fish Trap CR carry?

About 300 vehicles per day (2020 count), of which roughly 4% are trucks.

How long is Northwood RD over Fish Trap CR?

The structure is 31 ft (9.4 m) long with a longest span of 30 ft (9.1 m) and a deck 27 ft wide.

Who owns Northwood RD over Fish Trap CR?

It is owned by the County Highway Agency.