US Bridges

Smithers Ave S over Wetland

Good

King County, Washington · 3.0 MI E of SR 167 · Structure no. 089029000000000

Built
2017
8 years old
Condition
Good
inspected September 2024
Type
Culvert
Steel
Length
21 ft
1 main span
Daily traffic
75
2019 count
Owner
City
City or Municipal Highway Agency

About this bridge

Smithers Ave S over Wetland is a steel culvert carrying Smithers Ave S over Wetland in King County, Washington. It was built in 2017, so it is 8 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 75 vehicles a day, roughly 1% of them trucks, projected to reach 150 by 2044. The structure is 21 ft (6.4 m) long. If it were closed, the detour would be 1.2 mi (2 km).

CarriesSmithers Ave S
CrossesWetland
Location3.0 MI E of SR 167
RouteCity Street 1169
Coordinates47.43568, -122.20848
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
Channel and channel protection8 Very GoodNo problems noted.
Culvert8 Very GoodNo problems noted.
Last inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation8: 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 typeCulvert
MaterialSteel
DeckNot applicable
Main spans1
Design loadHL 93
Structure length21 ft (6.4 m)
Longest span21 ft (6.4 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic75 (2019)
Projected traffic150 by 2044
Trucks1%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesOther
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedWidening of existing bridge without deck rehabilitation
Estimated improvement cost$239,000 (2022 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was Smithers Ave S over Wetland built?

It was built in 2017, making it 8 years old in 2025.

What condition is Smithers Ave S 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 September 2024.

How much traffic does Smithers Ave S over Wetland carry?

About 75 vehicles per day (2019 count), of which roughly 1% are trucks.

How long is Smithers Ave S over Wetland?

The structure is 21 ft (6.4 m) long with a longest span of 21 ft (6.4 m).

Who owns Smithers Ave S over Wetland?

It is owned by the City or Municipal Highway Agency.