US Bridges

Tibbetts Ck LN NW over Tibbets Creek

Good

King County, Washington · 0.01 MI S of Shy Bear Way · Structure no. 088028000000000

Built
2008
17 years old
Condition
Good
inspected October 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
60 ft
1 main span
Daily traffic
525
2022 count
Owner
City
City or Municipal Highway Agency

About this bridge

Tibbetts Ck LN NW over Tibbets Creek is a prestressed concrete stringer/multi-beam or girder carrying Tibbetts Ck LN NW over Tibbets Creek in King County, Washington. It was built in 2008, so it is 17 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 525 vehicles a day, roughly 5% of them trucks, projected to reach 850 by 2042. The structure is 60 ft (18.3 m) long and 21 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesTibbetts Ck LN NW
CrossesTibbets Creek
Location0.01 MI S of Shy Bear Way
RouteCity Street 590
Coordinates47.53056, -122.07219
Functional classUrban Local

Condition and inspection

Good

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

ComponentRatingMeaning
Deck8 Very GoodNo problems noted.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionOctober 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations on dry land well above flood water elevations
Structural evaluation7: Better than present minimum criteria
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating67.5 US tons
Inventory rating52.1 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 25 or greater
Structure length60 ft (18.3 m)
Longest span58 ft (17.7 m)
Deck width21 ft (6.4 m)
Roadway width11 ft (3.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic525 (2022)
Projected traffic850 by 2042
Trucks5%
Lanes on structure1
Traffic directionOne-lane bridge for two-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$1.7 million (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Tibbetts Ck LN NW over Tibbets Creek built?

It was built in 2008, making it 17 years old in 2025.

What condition is Tibbetts Ck LN NW over Tibbets 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 October 2024.

How much traffic does Tibbetts Ck LN NW over Tibbets Creek carry?

About 525 vehicles per day (2022 count), of which roughly 5% are trucks.

How long is Tibbetts Ck LN NW over Tibbets Creek?

The structure is 60 ft (18.3 m) long with a longest span of 58 ft (17.7 m) and a deck 21 ft wide.

Who owns Tibbetts Ck LN NW over Tibbets Creek?

It is owned by the City or Municipal Highway Agency.