US Bridges

187th Pl SE over Un-Named Wetland

Good

Snohomish County, Washington · 1.6 E SR 527 · Structure no. 088915000000000

Built
2015
10 years old
Condition
Good
inspected April 2023
Type
Other
Steel
Length
136 ft
6 main spans
Daily traffic
1,032
2021 count
Owner
County
County Highway Agency

About this bridge

187th Pl SE over Un-Named Wetland is a steel other carrying 187th Pl SE over Un-Named Wetland in Snohomish County, Washington. It was built in 2015, so it is 10 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 1,032 vehicles a day, roughly 3% of them trucks, projected to reach 2,000 by 2045. The structure is 136 ft (41.5 m) long and 49 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Carries187th Pl SE
CrossesUn-Named Wetland
Location1.6 E SR 527
RouteCounty Highway 21720
Coordinates47.82746, -122.17827
Functional classUrban Local

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionApril 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation8: Equal to present desirable criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating106.8 US tons
Inventory rating106.8 US tons

Structure

Structure typeOther
MaterialSteel
DeckNot applicable
Main spans6
Design loadHS 20
Structure length136 ft (41.5 m)
Longest span20 ft (6 m)
Deck width49 ft (14.9 m)
Roadway width36 ft (11 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,032 (2021)
Projected traffic2,000 by 2045
Trucks3%
Lanes on structure2
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$5.3 million (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was 187th Pl SE over Un-Named Wetland built?

It was built in 2015, making it 10 years old in 2025.

What condition is 187th Pl SE over Un-Named Wetland 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 April 2023.

How much traffic does 187th Pl SE over Un-Named Wetland carry?

About 1,032 vehicles per day (2021 count), of which roughly 3% are trucks.

How long is 187th Pl SE over Un-Named Wetland?

The structure is 136 ft (41.5 m) long with a longest span of 20 ft (6 m) and a deck 49 ft wide.

Who owns 187th Pl SE over Un-Named Wetland?

It is owned by the County Highway Agency.