US Bridges

187 Ave SE over Lewis Creek

Fair

King County, Washington · 0.7 MI N of I-90 · Structure no. 082324000000000

Built
1986
39 years old
Condition
Fair
inspected October 2024
Type
Slab
Prestressed Concrete
Length
43 ft
2 main spans
Daily traffic
205
2024 count
Owner
City
City or Municipal Highway Agency

About this bridge

187 Ave SE over Lewis Creek is a prestressed concrete slab carrying 187 Ave SE over Lewis Creek in King County, Washington. It was built in 1986, so it is 39 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.

It carries about 205 vehicles a day, roughly 5% of them trucks, projected to reach 450 by 2042. The structure is 43 ft (13.1 m) long and 40 ft wide. If it were closed, the detour would be 98.8 mi (159 km).

Location

Open in Google Maps
Carries187 Ave SE
CrossesLewis Creek
Location0.7 MI N of I-90
RouteCity Street 590
CountyKing County
StateWashington
Coordinates47.57066, -122.0924
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.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionOctober 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating60 US tons
Inventory rating36 US tons

Structure

Structure typeSlab
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length43 ft (13.1 m)
Longest span21 ft (6.4 m)
Deck width40 ft (12.2 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic205 (2024)
Projected traffic450 by 2042
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed98.8 mi (159 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$1.9 million (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was 187 Ave SE over Lewis Creek built?

It was built in 1986, making it 39 years old in 2025.

What condition is 187 Ave SE over Lewis Creek 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 October 2024.

How much traffic does 187 Ave SE over Lewis Creek carry?

About 205 vehicles per day (2024 count), of which roughly 5% are trucks.

How long is 187 Ave SE over Lewis Creek?

The structure is 43 ft (13.1 m) long with a longest span of 21 ft (6.4 m) and a deck 40 ft wide.

Who owns 187 Ave SE over Lewis Creek?

It is owned by the City or Municipal Highway Agency.