US Bridges

SE 416th ST over Newaukum Creek

Good

King County, Washington · 0.6 MI E of SR-169 · Structure no. 088138000000000

Built
2009
16 years old
Condition
Good
inspected July 2023
Type
Slab
Prestressed Concrete
Length
41 ft
1 main span
Daily traffic
1,874
2019 count
Owner
County
County Highway Agency

About this bridge

SE 416th ST over Newaukum Creek is a prestressed concrete slab carrying SE 416th ST over Newaukum Creek in King County, Washington. It was built in 2009, so it is 16 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 1,874 vehicles a day, roughly 12% of them trucks, projected to reach 3,385 by 2039. The structure is 41 ft (12.5 m) long and 32 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesSE 416th ST
CrossesNewaukum Creek
Location0.6 MI E of SR-169
RouteCounty Highway 93630
CountyKing County
StateWashington
Coordinates47.22833, -121.97684
Functional classRural Major 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.
Superstructure7 GoodSome minor problems.
Substructure8 Very GoodNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating69.3 US tons
Inventory rating53.6 US tons

Structure

Structure typeSlab
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1
Design loadHL 93
Structure length41 ft (12.5 m)
Longest span38 ft (11.6 m)
Deck width32 ft (9.8 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,874 (2019)
Projected traffic3,385 by 2039
Trucks12%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$1.8 million (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was SE 416th ST over Newaukum Creek built?

It was built in 2009, making it 16 years old in 2025.

What condition is SE 416th ST over Newaukum 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 July 2023.

How much traffic does SE 416th ST over Newaukum Creek carry?

About 1,874 vehicles per day (2019 count), of which roughly 12% are trucks.

How long is SE 416th ST over Newaukum Creek?

The structure is 41 ft (12.5 m) long with a longest span of 38 ft (11.6 m) and a deck 32 ft wide.

Who owns SE 416th ST over Newaukum Creek?

It is owned by the County Highway Agency.