US Bridges

SE 416th ST over Newaukum Creek

Fair

King County, Washington · 0.9 MI E of SR-169 · Structure no. 082353000000000

Built
1958
67 years old
Condition
Fair
inspected July 2023
Type
Stringer/Multi-beam or Girder
Concrete Continuous
Length
70 ft
3 main spans
Daily traffic
1,874
2019 count
Owner
County
County Highway Agency

About this bridge

SE 416th ST over Newaukum Creek is a concrete continuous stringer/multi-beam or girder carrying SE 416th ST over Newaukum Creek in King County, Washington. It was built in 1958, so it is 67 years old, older than the Washington average of 49.8 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 6 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 1,874 vehicles a day, roughly 12% of them trucks, projected to reach 3,585 by 2039. The structure is 70 ft (21.3 m) long and 31 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

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CarriesSE 416th ST
CrossesNewaukum Creek
Location0.9 MI E of SR-169
RouteCounty Highway 93630
CountyKing County
StateWashington
Coordinates47.22827, -121.97083
Functional classRural Major Collector

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourUnknown foundation; not evaluated for scour
Structural evaluation6: Equal to 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 rating36 US tons
Inventory rating27.9 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 15
Structure length70 ft (21.3 m)
Longest span30 ft (9.1 m)
Deck width31 ft (9.6 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,874 (2019)
Projected traffic3,585 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$2.9 million (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was SE 416th ST over Newaukum Creek built?

It was built in 1958, making it 67 years old in 2025.

What condition is SE 416th ST over Newaukum Creek in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. 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 70 ft (21.3 m) long with a longest span of 30 ft (9.1 m) and a deck 31 ft wide.

Who owns SE 416th ST over Newaukum Creek?

It is owned by the County Highway Agency.