US Bridges

180th St. SE over Thompson Creek

Good

Snohomish County, Washington · 0.3 E SR527 · Structure no. 089212000000000

Built
2021
4 years old
Condition
Good
inspected August 2023
Type
Culvert
Concrete
Length
23 ft
1 main span
Daily traffic
11,759
2021 count
Owner
County
County Highway Agency

About this bridge

180th St. SE over Thompson Creek is a concrete culvert carrying 180th St. SE over Thompson Creek in Snohomish 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 11,759 vehicles a day, roughly 6% of them trucks, projected to reach 18,000 by 2043. The structure is 23 ft (6.9 m) long. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
Carries180th St. SE
CrossesThompson Creek
Location0.3 E SR527
RouteCounty Highway 18400
CountySnohomish County
StateWashington
Coordinates47.83466, -122.20305
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
Channel and channel protection8 Very GoodNo problems noted.
Culvert8 Very GoodNo problems noted.
Last inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation5: 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 rating42.1 US tons
Inventory rating25 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans1
Design loadHL 93
Structure length23 ft (6.9 m)
Longest span23 ft (6.9 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic11,759 (2021)
Projected traffic18,000 by 2043
Trucks6%
Lanes on structure5
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$2.3 million (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was 180th St. SE over Thompson Creek built?

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

What condition is 180th St. SE over Thompson 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 2023.

How much traffic does 180th St. SE over Thompson Creek carry?

About 11,759 vehicles per day (2021 count), of which roughly 6% are trucks.

How long is 180th St. SE over Thompson Creek?

The structure is 23 ft (6.9 m) long with a longest span of 23 ft (6.9 m).

Who owns 180th St. SE over Thompson Creek?

It is owned by the County Highway Agency.