US Bridges

I-5 over Gn RY

Fair

Skagit County, Washington · 2.1 N JCT SR 11 · Structure no. 0007124A0000000

Built
1963
62 years old
Condition
Fair
inspected May 2024
Type
Box Beam or Girders - Multiple
Concrete Continuous
Length
270 ft
5 main spans
Daily traffic
25,876
2023 count
Owner
State
State Highway Agency

About this bridge

I-5 over Gn RY is a concrete continuous box beam or girders - multiple carrying I-5 over Gn RY in Skagit County, Washington. It was built in 1963, so it is 62 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 25,876 vehicles a day, roughly 7% of them trucks, projected to reach 39,443 by 2039. The structure is 270 ft (82.3 m) long and 36 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesI-5
CrossesGn RY
Location2.1 N JCT SR 11
RouteInterstate 5
Coordinates48.51444, -122.34306
Functional classRural 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.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Last inspectionMay 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating46.7 US tons
Inventory rating36 US tons

Structure

MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans5
Design loadHS 20
Structure length270 ft (82.3 m)
Longest span80 ft (24.4 m)
Deck width36 ft (11 m)
Roadway width33 ft (10.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic25,876 (2023)
Projected traffic39,443 by 2039
Trucks7%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesRailroad
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$5.1 million (2022 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was I-5 over Gn RY built?

It was built in 1963, making it 62 years old in 2025.

What condition is I-5 over Gn RY 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 Gn RY carry?

About 25,876 vehicles per day (2023 count), of which roughly 7% are trucks.

How long is I-5 over Gn RY?

The structure is 270 ft (82.3 m) long with a longest span of 80 ft (24.4 m) and a deck 36 ft wide.

Who owns I-5 over Gn RY?

It is owned by the State Highway Agency.