US Bridges

SR 20 over E Fk Red Cabin CR

Good

Skagit County, Washington · 10.2 E JCT SR 9 · Structure no. 0007894B0000000

Built
1966
59 years old
Condition
Good
inspected June 2024
Type
Slab
Concrete Continuous
Length
171 ft
6 main spans
Daily traffic
7,403
2023 count
Owner
State
State Highway Agency

About this bridge

SR 20 over E Fk Red Cabin CR is a concrete continuous slab carrying SR 20 over E Fk Red Cabin CR in Skagit County, Washington. It was built in 1966, so it is 59 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 7,403 vehicles a day, roughly 9% of them trucks, projected to reach 10,853 by 2039. The structure is 171 ft (52.1 m) long and 32 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

CarriesSR 20
CrossesE Fk Red Cabin CR
Location10.2 E JCT SR 9
RouteState Highway 20
Coordinates48.5305, -122.0145
Functional classRural Minor Arterial

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 protection8 Very GoodNo problems noted.
Last inspectionJune 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating37.5 US tons
Inventory rating28.9 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans6
Design loadHS 20
Structure length171 ft (52.1 m)
Longest span30 ft (9.1 m)
Deck width32 ft (9.9 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic7,403 (2023)
Projected traffic10,853 by 2039
Trucks9%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 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$3.2 million (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was SR 20 over E Fk Red Cabin CR built?

It was built in 1966, making it 59 years old in 2025.

What condition is SR 20 over E Fk Red Cabin CR 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 2024.

How much traffic does SR 20 over E Fk Red Cabin CR carry?

About 7,403 vehicles per day (2023 count), of which roughly 9% are trucks.

How long is SR 20 over E Fk Red Cabin CR?

The structure is 171 ft (52.1 m) long with a longest span of 30 ft (9.1 m) and a deck 32 ft wide.

Who owns SR 20 over E Fk Red Cabin CR?

It is owned by the State Highway Agency.