US Bridges

Lakemont Blvd over Hill Side

Fair

King County, Washington · 0.1 MI S of JCT I-90 · Structure no. 086629000000000

Built
1998
27 years old
Condition
Fair
inspected May 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete Continuous
Length
841 ft
6 main spans
Daily traffic
16,261
2022 count
Owner
City
City or Municipal Highway Agency

About this bridge

Lakemont Blvd over Hill Side is a prestressed concrete continuous stringer/multi-beam or girder carrying Lakemont Blvd over Hill Side in King County, Washington. It was built in 1998, so it is 27 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 16,261 vehicles a day, roughly 4% of them trucks, projected to reach 20,326 by 2042. The structure is 841 ft (256.3 m) long and 53 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

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CarriesLakemont Blvd
CrossesHill Side
Location0.1 MI S of JCT I-90
RouteCity Street 2550
CountyKing County
StateWashington
Coordinates47.56013, -122.0999
Functional classUrban Minor Arterial

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.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Last inspectionMay 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating82.1 US tons
Inventory rating49.3 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans6
Design loadHS 25 or greater
Structure length841 ft (256.3 m)
Longest span140 ft (42.7 m)
Deck width53 ft (16.1 m)
Roadway width44 ft (13.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic16,261 (2022)
Projected traffic20,326 by 2042
Trucks4%
Lanes on structure3
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesOther
Detour if closed3.7 mi (6 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$40.4 million (2022 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was Lakemont Blvd over Hill Side built?

It was built in 1998, making it 27 years old in 2025.

What condition is Lakemont Blvd over Hill Side 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 Lakemont Blvd over Hill Side carry?

About 16,261 vehicles per day (2022 count), of which roughly 4% are trucks.

How long is Lakemont Blvd over Hill Side?

The structure is 841 ft (256.3 m) long with a longest span of 140 ft (42.7 m) and a deck 53 ft wide.

Who owns Lakemont Blvd over Hill Side?

It is owned by the City or Municipal Highway Agency.