US Bridges

H ST over I-5

Good

Whatcom County, Washington · 0.7 N JCT SR 543 · Structure no. 0006851B0000000

Built
1962
63 years old
Condition
Good
inspected May 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
284 ft
4 main spans
Daily traffic
1,984
2020 count
Owner
State
State Highway Agency

About this bridge

H ST over I-5 is a prestressed concrete stringer/multi-beam or girder carrying H ST over I-5 in Whatcom County, Washington. It was built in 1962, so it is 63 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 1,984 vehicles a day, roughly 5% of them trucks, projected to reach 3,126 by 2040. The structure is 284 ft (86.7 m) long and 38 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesH ST
CrossesI-5
Location0.7 N JCT SR 543
RouteState Highway 0
Coordinates48.99403, -122.74606
Functional classUrban Collector

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.
Last inspectionMay 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
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
Approach roadway alignment8: Equal to present desirable criteria
Operating rating26.1 US tons
Inventory rating20.4 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length284 ft (86.7 m)
Longest span88 ft (26.8 m)
Deck width38 ft (11.5 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,984 (2020)
Projected traffic3,126 by 2040
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 SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$4.3 million (2022 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was H ST over I-5 built?

It was built in 1962, making it 63 years old in 2025.

What condition is H ST over I-5 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 2023.

How much traffic does H ST over I-5 carry?

About 1,984 vehicles per day (2020 count), of which roughly 5% are trucks.

How long is H ST over I-5?

The structure is 284 ft (86.7 m) long with a longest span of 88 ft (26.8 m) and a deck 38 ft wide.

Who owns H ST over I-5?

It is owned by the State Highway Agency.