US Bridges

SR 20 over Fish Creek

Good

Skagit County, Washington · 21.7 E JCT SR 9 · Structure no. 0019643A0000000

Built
2021
4 years old
Condition
Good
inspected August 2024
Type
Culvert
Concrete
Length
20 ft
1 main span
Daily traffic
5,460
2023 count
Owner
State
State Highway Agency

About this bridge

SR 20 over Fish Creek is a concrete culvert carrying SR 20 over Fish Creek in Skagit County, Washington. It was built in 2021, so it is 4 years old, younger 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 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 5,460 vehicles a day, roughly 8% of them trucks, projected to reach 7,377 by 2041. The structure is 20 ft (6.2 m) long and 43 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesSR 20
CrossesFish Creek
Location21.7 E JCT SR 9
RouteState Highway 20
Coordinates48.53803, -121.77439
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
Channel and channel protection8 Very GoodNo problems noted.
Culvert8 Very GoodNo problems noted.
Last inspectionAugust 2024
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating59.3 US tons
Inventory rating45.7 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans1
Design loadHL 93
Structure length20 ft (6.2 m)
Longest span20 ft (6.2 m)
Deck width43 ft (13.2 m)
Roadway width40 ft (12.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5,460 (2023)
Projected traffic7,377 by 2041
Trucks8%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$407,000 (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was SR 20 over Fish Creek built?

It was built in 2021, making it 4 years old in 2025.

What condition is SR 20 over Fish 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 August 2024.

How much traffic does SR 20 over Fish Creek carry?

About 5,460 vehicles per day (2023 count), of which roughly 8% are trucks.

How long is SR 20 over Fish Creek?

The structure is 20 ft (6.2 m) long with a longest span of 20 ft (6.2 m) and a deck 43 ft wide.

Who owns SR 20 over Fish Creek?

It is owned by the State Highway Agency.