US Bridges

SE Summit Landsbur over Rock Creek

Good

King County, Washington · 0.5 MI N of SR169 · Structure no. 089383000000000

Built
2022
3 years old
Condition
Good
inspected April 2024
Type
Tee Beam
Prestressed Concrete
Length
60 ft
1 main span
Daily traffic
1,200
2022 count
Owner
City
City or Municipal Highway Agency

About this bridge

SE Summit Landsbur over Rock Creek is a prestressed concrete tee beam carrying SE Summit Landsbur over Rock Creek in King County, Washington. It was built in 2022, so it is 3 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 1,200 vehicles a day, roughly 3% of them trucks, projected to reach 1,800 by 2042. The structure is 60 ft (18.2 m) long and 35 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

CarriesSE Summit Landsbur
CrossesRock Creek
Location0.5 MI N of SR169
RouteCounty Highway 615
Coordinates47.36519, -122.01394
Functional classUrban Collector

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.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionApril 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation8: Equal to present desirable 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 rating82.5 US tons
Inventory rating60.7 US tons

Structure

Structure typeTee Beam
MaterialPrestressed Concrete
DeckOther
Main spans1
Design loadHL 93
Structure length60 ft (18.2 m)
Longest span55 ft (16.8 m)
Deck width35 ft (10.7 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,200 (2022)
Projected traffic1,800 by 2042
Trucks3%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
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 proposedWidening of existing bridge without deck rehabilitation
Estimated improvement cost$963,000 (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was SE Summit Landsbur over Rock Creek built?

It was built in 2022, making it 3 years old in 2025.

What condition is SE Summit Landsbur over Rock 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 April 2024.

How much traffic does SE Summit Landsbur over Rock Creek carry?

About 1,200 vehicles per day (2022 count), of which roughly 3% are trucks.

How long is SE Summit Landsbur over Rock Creek?

The structure is 60 ft (18.2 m) long with a longest span of 55 ft (16.8 m) and a deck 35 ft wide.

Who owns SE Summit Landsbur over Rock Creek?

It is owned by the City or Municipal Highway Agency.