US Bridges

Lakemont Blvd over Lewis Creek

Good

King County, Washington · 1.0 MI S of I-90 · Structure no. 086212000000000

Built
1990
35 years old
Condition
Good
inspected May 2024
Type
Slab
Prestressed Concrete
Length
45 ft
1 main span
Daily traffic
12,334
2022 count
Owner
City
City or Municipal Highway Agency

About this bridge

Lakemont Blvd over Lewis Creek is a prestressed concrete slab carrying Lakemont Blvd over Lewis Creek in King County, Washington. It was built in 1990, so it is 35 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 12,334 vehicles a day, roughly 6% of them trucks, projected to reach 15,418 by 2042. The structure is 45 ft (13.7 m) long and 62 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

CarriesLakemont Blvd
CrossesLewis Creek
Location1.0 MI S of I-90
RouteCity Street 7512
Coordinates47.55773, -122.11707
Functional classUrban Minor Arterial

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionMay 2024
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 adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating87.5 US tons
Inventory rating52.1 US tons

Structure

Structure typeSlab
MaterialPrestressed Concrete
DeckOther
Main spans1
Design loadHS 20
Structure length45 ft (13.7 m)
Longest span43 ft (13.1 m)
Deck width62 ft (18.9 m)
Roadway width46 ft (14 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic12,334 (2022)
Projected traffic15,418 by 2042
Trucks6%
Lanes on structure3
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed3.1 mi (5 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$2.6 million (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Lakemont Blvd over Lewis Creek built?

It was built in 1990, making it 35 years old in 2025.

What condition is Lakemont Blvd over Lewis Creek 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 2024.

How much traffic does Lakemont Blvd over Lewis Creek carry?

About 12,334 vehicles per day (2022 count), of which roughly 6% are trucks.

How long is Lakemont Blvd over Lewis Creek?

The structure is 45 ft (13.7 m) long with a longest span of 43 ft (13.1 m) and a deck 62 ft wide.

Who owns Lakemont Blvd over Lewis Creek?

It is owned by the City or Municipal Highway Agency.