US Bridges

163rd Pl SE over Wetland

FairPosted for load

King County, Washington · 163 Pl & Cougar Mt Way · Structure no. 087399000000000

Built
2000
25 years old
Condition
Fair
inspected May 2024
Type
Slab
Concrete
Length
24 ft
1 main span
Daily traffic
424
2022 count
Owner
City
City or Municipal Highway Agency

About this bridge

163rd Pl SE over Wetland is a concrete slab carrying 163rd Pl SE over Wetland in King County, Washington. It was built in 2000, so it is 25 years old, younger than the Washington average of 49.8 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 6 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. Its operating status is: posted for load restriction.

It carries about 424 vehicles a day, roughly 10% of them trucks, projected to reach 530 by 2042. The structure is 24 ft (7.3 m) long and 41 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
Carries163rd Pl SE
CrossesWetland
Location163 Pl & Cougar Mt Way
RouteCity Street 75
CountyKing County
StateWashington
Coordinates47.54264, -122.12321
Functional classUrban Local

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionMay 2024
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry5: 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 rating37.5 US tons
Inventory rating22.5 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckOther
Main spans1
Design loadHS 20
Structure length24 ft (7.3 m)
Longest span20 ft (6.2 m)
Deck width41 ft (12.6 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic424 (2022)
Projected traffic530 by 2042
Trucks10%
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

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$1.2 million (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was 163rd Pl SE over Wetland built?

It was built in 2000, making it 25 years old in 2025.

What condition is 163rd Pl SE over Wetland in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in May 2024.

How much traffic does 163rd Pl SE over Wetland carry?

About 424 vehicles per day (2022 count), of which roughly 10% are trucks.

How long is 163rd Pl SE over Wetland?

The structure is 24 ft (7.3 m) long with a longest span of 20 ft (6.2 m) and a deck 41 ft wide.

Who owns 163rd Pl SE over Wetland?

It is owned by the City or Municipal Highway Agency.