US Bridges

Newport Way SW over Tibbetts Creek

Good

King County, Washington · 0.1 MI W of SR-900 · Structure no. 087066000000000

Built
2001
24 years old, rebuilt 2018
Condition
Good
inspected September 2023
Type
Culvert
Concrete
Length
26 ft
1 main span
Daily traffic
16,500
2021 count
Owner
City
City or Municipal Highway Agency

About this bridge

Newport Way SW over Tibbetts Creek is a concrete culvert carrying Newport Way SW over Tibbetts Creek in King County, Washington. It was built in 2001 and reconstructed in 2018, so it is 24 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 16,500 vehicles a day, roughly 5% of them trucks, projected to reach 25,500 by 2041. The structure is 26 ft (8 m) long and 83 ft wide. If it were closed, the detour would be 5 mi (8 km).

CarriesNewport Way SW
CrossesTibbetts Creek
Location0.1 MI W of SR-900
RouteCity Street 590
Coordinates47.54144, -122.064
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
Channel and channel protection8 Very GoodNo problems noted.
Culvert7 GoodSome minor problems.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating60.4 US tons
Inventory rating46.7 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans1
Design loadHS 20
Structure length26 ft (8 m)
Longest span25 ft (7.5 m)
Deck width83 ft (25.3 m)
Roadway width35 ft (10.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic16,500 (2021)
Projected traffic25,500 by 2041
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed5 mi (8 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$1.3 million (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Newport Way SW over Tibbetts Creek built?

It was built in 2001, making it 24 years old in 2025. It was reconstructed in 2018.

What condition is Newport Way SW over Tibbetts 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 September 2023.

How much traffic does Newport Way SW over Tibbetts Creek carry?

About 16,500 vehicles per day (2021 count), of which roughly 5% are trucks.

How long is Newport Way SW over Tibbetts Creek?

The structure is 26 ft (8 m) long with a longest span of 25 ft (7.5 m) and a deck 83 ft wide.

Who owns Newport Way SW over Tibbetts Creek?

It is owned by the City or Municipal Highway Agency.