US Bridges

SR 20 over Abandoned RR

Fair

Skagit County, Washington · 8.1 E Island CO · Structure no. 0007777A0000000

Built
1965
60 years old, rebuilt 1993
Condition
Fair
inspected March 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
200 ft
3 main spans
Daily traffic
18,383
2023 count
Owner
State
State Highway Agency

About this bridge

SR 20 over Abandoned RR is a prestressed concrete stringer/multi-beam or girder carrying SR 20 over Abandoned RR in Skagit County, Washington. It was built in 1965 and reconstructed in 1993, so it is 60 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 18,383 vehicles a day, roughly 6% of them trucks, projected to reach 24,825 by 2039. The structure is 200 ft (61 m) long and 41 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesSR 20
CrossesAbandoned RR
Location8.1 E Island CO
RouteState Highway 20
Coordinates48.46294, -122.54061
Functional classUrban Principal Arterial - Other Freeway or Expressway

Condition and inspection

Fair

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

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Last inspectionMarch 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating90.9 US tons
Inventory rating54 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length200 ft (61 m)
Longest span85 ft (25.9 m)
Deck width41 ft (12.6 m)
Roadway width38 ft (11.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic18,383 (2023)
Projected traffic24,825 by 2039
Trucks6%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesOther
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkSTRAHNET connector

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$3.8 million (2022 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was SR 20 over Abandoned RR built?

It was built in 1965, making it 60 years old in 2025. It was reconstructed in 1993.

What condition is SR 20 over Abandoned RR 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 March 2024.

How much traffic does SR 20 over Abandoned RR carry?

About 18,383 vehicles per day (2023 count), of which roughly 6% are trucks.

How long is SR 20 over Abandoned RR?

The structure is 200 ft (61 m) long with a longest span of 85 ft (25.9 m) and a deck 41 ft wide.

Who owns SR 20 over Abandoned RR?

It is owned by the State Highway Agency.