US Bridges

I-5 over Friday Creek

Good

Skagit County, Washington · 11.1 N JCT SR 11 · Structure no. 0007260D0000000

Built
1964
61 years old
Condition
Good
inspected March 2023
Type
Slab
Concrete Continuous
Length
112 ft
3 main spans
Daily traffic
24,230
2023 count
Owner
State
State Highway Agency

About this bridge

I-5 over Friday Creek is a concrete continuous slab carrying I-5 over Friday Creek in Skagit County, Washington. It was built in 1964, so it is 61 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 24,230 vehicles a day, roughly 7% of them trucks, projected to reach 34,783 by 2039. The structure is 112 ft (34.1 m) long and 41 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesI-5
CrossesFriday Creek
Location11.1 N JCT SR 11
RouteInterstate 5
CountySkagit County
StateWashington
Coordinates48.64136, -122.36275
Functional classRural Principal Arterial - Interstate

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 protection7 GoodSome minor problems.
Last inspectionMarch 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating69 US tons
Inventory rating41 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length112 ft (34.1 m)
Longest span44 ft (13.4 m)
Deck width41 ft (12.6 m)
Roadway width39 ft (11.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic24,230 (2023)
Projected traffic34,783 by 2039
Trucks7%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
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$2.1 million (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was I-5 over Friday Creek built?

It was built in 1964, making it 61 years old in 2025.

What condition is I-5 over Friday 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 March 2023.

How much traffic does I-5 over Friday Creek carry?

About 24,230 vehicles per day (2023 count), of which roughly 7% are trucks.

How long is I-5 over Friday Creek?

The structure is 112 ft (34.1 m) long with a longest span of 44 ft (13.4 m) and a deck 41 ft wide.

Who owns I-5 over Friday Creek?

It is owned by the State Highway Agency.