US Bridges

I-5 over SR 11 (connelly Ave)

Fair

Whatcom County, Washington · 8.1 N Skagit CO · Structure no. 0006928C0000000

Built
1962
63 years old
Condition
Fair
inspected May 2024
Type
Slab
Concrete Continuous
Length
169 ft
3 main spans
Daily traffic
22,194
2023 count
Owner
State
State Highway Agency

About this bridge

I-5 over SR 11 (connelly Ave) is a concrete continuous slab carrying I-5 over SR 11 (connelly Ave) 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 fair condition with a lowest component rating of 6 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 22,194 vehicles a day, roughly 7% of them trucks, projected to reach 31,189 by 2039. The structure is 169 ft (51.5 m) long and 36 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesI-5
CrossesSR 11 (connelly Ave)
Location8.1 N Skagit CO
RouteInterstate 5
CountyWhatcom County
StateWashington
Coordinates48.71389, -122.47481
Functional classUrban Principal Arterial - Interstate

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Last inspectionMay 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry2: Basically intolerable, requiring high priority of replacement
Approach roadway alignment8: Equal to present desirable criteria
Operating rating70 US tons
Inventory rating41 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length169 ft (51.5 m)
Longest span67 ft (20.4 m)
Deck width36 ft (10.9 m)
Roadway width33 ft (10 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic22,194 (2023)
Projected traffic31,189 by 2039
Trucks7%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkInterstate STRAHNET route

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$2.8 million (2022 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was I-5 over SR 11 (connelly Ave) built?

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

What condition is I-5 over SR 11 (connelly Ave) in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in May 2024.

How much traffic does I-5 over SR 11 (connelly Ave) carry?

About 22,194 vehicles per day (2023 count), of which roughly 7% are trucks.

How long is I-5 over SR 11 (connelly Ave)?

The structure is 169 ft (51.5 m) long with a longest span of 67 ft (20.4 m) and a deck 36 ft wide.

Who owns I-5 over SR 11 (connelly Ave)?

It is owned by the State Highway Agency.