US Bridges

23rd DR SE over Wetland

Good

Snohomish County, Washington · 0.2 E JCT SR 527 · Structure no. 087031000000000

Built
2003
22 years old
Condition
Good
inspected May 2023
Type
Slab
Prestressed Concrete
Length
71 ft
1 main span
Daily traffic
144
2021 count
Owner
County
County Highway Agency

About this bridge

23rd DR SE over Wetland is a prestressed concrete slab carrying 23rd DR SE over Wetland in Snohomish County, Washington. It was built in 2003, so it is 22 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 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 144 vehicles a day, roughly 2% of them trucks, projected to reach 300 by 2045. The structure is 71 ft (21.6 m) long and 36 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Carries23rd DR SE
CrossesWetland
Location0.2 E JCT SR 527
RouteCounty Highway 17797
Coordinates47.82033, -122.20169
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.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionMay 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation7: Better than present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating93 US tons
Inventory rating56 US tons

Structure

Structure typeSlab
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1
Design loadHS 25 or greater
Structure length71 ft (21.6 m)
Longest span69 ft (21 m)
Deck width36 ft (11 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic144 (2021)
Projected traffic300 by 2045
Trucks2%
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$2.9 million (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was 23rd DR SE over Wetland built?

It was built in 2003, making it 22 years old in 2025.

What condition is 23rd DR SE over 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 May 2023.

How much traffic does 23rd DR SE over Wetland carry?

About 144 vehicles per day (2021 count), of which roughly 2% are trucks.

How long is 23rd DR SE over Wetland?

The structure is 71 ft (21.6 m) long with a longest span of 69 ft (21 m) and a deck 36 ft wide.

Who owns 23rd DR SE over Wetland?

It is owned by the County Highway Agency.