US Bridges

SR 20 over Hansen Creek

Good

Skagit County, Washington · 1.5 E JCT SR 9 · Structure no. 0003478A0000000

Built
1949
76 years old
Condition
Good
inspected August 2024
Type
Slab
Concrete Continuous
Length
50 ft
3 main spans
Daily traffic
10,162
2023 count
Owner
State
State Highway Agency

About this bridge

SR 20 over Hansen Creek is a concrete continuous slab carrying SR 20 over Hansen Creek in Skagit County, Washington. It was built in 1949, so it is 76 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 10,162 vehicles a day, roughly 9% of them trucks, projected to reach 14,899 by 2039. The structure is 50 ft (15.2 m) long and 40 ft wide. If it were closed, the detour would be 8.1 mi (13 km).

CarriesSR 20
CrossesHansen Creek
Location1.5 E JCT SR 9
RouteState Highway 20
Coordinates48.52125, -122.19914
Functional classUrban 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 protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionAugust 2024
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating76.9 US tons
Inventory rating45 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length50 ft (15.2 m)
Longest span15 ft (4.6 m)
Deck width40 ft (12.2 m)
Roadway width36 ft (11 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic10,162 (2023)
Projected traffic14,899 by 2039
Trucks9%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed8.1 mi (13 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$950,000 (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was SR 20 over Hansen Creek built?

It was built in 1949, making it 76 years old in 2025.

What condition is SR 20 over Hansen 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 Hansen Creek carry?

About 10,162 vehicles per day (2023 count), of which roughly 9% are trucks.

How long is SR 20 over Hansen Creek?

The structure is 50 ft (15.2 m) long with a longest span of 15 ft (4.6 m) and a deck 40 ft wide.

Who owns SR 20 over Hansen Creek?

It is owned by the State Highway Agency.