US Bridges

SE 416th ST over Newaukum Creek

Fair

King County, Washington · 1.1 MI N of SR-164 · Structure no. 081136000000000

Built
1950
75 years old
Condition
Fair
inspected July 2024
Type
Channel Beam
Concrete
Length
40 ft
2 main spans
Daily traffic
1,592
2019 count
Owner
County
County Highway Agency

About this bridge

SE 416th ST over Newaukum Creek is a concrete channel beam carrying SE 416th ST over Newaukum Creek in King County, Washington. It was built in 1950, so it is 75 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 5 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 1,592 vehicles a day, roughly 4% of them trucks, projected to reach 2,100 by 2039. The structure is 40 ft (12.2 m) long and 24 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesSE 416th ST
CrossesNewaukum Creek
Location1.1 MI N of SR-164
RouteCounty Highway 31280
CountyKing County
StateWashington
Coordinates47.22825, -122.03139
Functional classRural Minor 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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionJuly 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourCountermeasures installed to correct a previously existing problem
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating22.5 US tons
Inventory rating15.8 US tons

Structure

Structure typeChannel Beam
MaterialConcrete
DeckConcrete, precast panels
Main spans2
Design loadHS 15
Structure length40 ft (12.2 m)
Longest span19 ft (5.8 m)
Deck width24 ft (7.3 m)
Roadway width23 ft (6.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,592 (2019)
Projected traffic2,100 by 2039
Trucks4%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 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 1950, making it 75 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 2024.

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

About 1,592 vehicles per day (2019 count), of which roughly 4% are trucks.

How long is SE 416th ST over Newaukum Creek?

The structure is 40 ft (12.2 m) long with a longest span of 19 ft (5.8 m) and a deck 24 ft wide.

Who owns SE 416th ST over Newaukum Creek?

It is owned by the County Highway Agency.