US Bridges

D Street over SR 543 Northbound

Good

Whatcom County, Washington · 0.8 N JCT I-5 · Structure no. 0017064A0000000

Built
2007
18 years old
Condition
Good
inspected June 2021
Type
Slab
Concrete
Length
64 ft
1 main span
Daily traffic
6,423
2008 count
Owner
State
State Highway Agency

About this bridge

D Street over SR 543 Northbound is a concrete slab carrying D Street over SR 543 Northbound in Whatcom County, Washington. It was built in 2007, so it is 18 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 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 6,423 vehicles a day, roughly 5% of them trucks. The structure is 64 ft (19.5 m) long and 55 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesD Street
CrossesSR 543 Northbound
Location0.8 N JCT I-5
RouteCity Street 0
Coordinates48.99817, -122.73483
Functional classUrban Local

Condition and inspection

Good

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

ComponentRatingMeaning
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Last inspectionJune 2021
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation8: Equal to present desirable criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating89 US tons
Inventory rating54 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadHL 93
Structure length64 ft (19.5 m)
Longest span64 ft (19.5 m)
Deck width55 ft (16.8 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic6,423 (2008)
Projected traffic—
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesHighway
Detour if closed1.2 mi (2 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$1.1 million
NavigationNot applicable (no waterway)

Frequently asked questions

When was D Street over SR 543 Northbound built?

It was built in 2007, making it 18 years old in 2025.

What condition is D Street over SR 543 Northbound 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 June 2021.

How much traffic does D Street over SR 543 Northbound carry?

About 6,423 vehicles per day (2008 count), of which roughly 5% are trucks.

How long is D Street over SR 543 Northbound?

The structure is 64 ft (19.5 m) long with a longest span of 64 ft (19.5 m) and a deck 55 ft wide.

Who owns D Street over SR 543 Northbound?

It is owned by the State Highway Agency.