US Bridges

236th Ave SE over Newaukum Creek

Fair

King County, Washington · 0.5 MI N of SR-164 · Structure no. 081902000000000

Built
1927
98 years old, rebuilt 1955
Condition
Fair
inspected July 2023
Type
Frame
Concrete Continuous
Length
49 ft
3 main spans
Daily traffic
520
2019 count
Owner
County
County Highway Agency

About this bridge

236th Ave SE over Newaukum Creek is a concrete continuous frame carrying 236th Ave SE over Newaukum Creek in King County, Washington. It was built in 1927 and reconstructed in 1955, so it is 98 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 520 vehicles a day, roughly 1% of them trucks, projected to reach 900 by 2039. The structure is 49 ft (14.9 m) long and 30 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
Carries236th Ave SE
CrossesNewaukum Creek
Location0.5 MI N of SR-164
RouteCounty Highway 30810
CountyKing County
StateWashington
Coordinates47.21637, -122.02687
Functional classRural Local

Condition and inspection

Fair

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

ComponentRatingMeaning
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
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 protection7 GoodSome minor problems.
Last inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourUnknown foundation; not evaluated for scour
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating38.9 US tons
Inventory rating30 US tons

Structure

Structure typeFrame
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 15
Structure length49 ft (14.9 m)
Longest span16 ft (4.9 m)
Deck width30 ft (9.1 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic520 (2019)
Projected traffic900 by 2039
Trucks1%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
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 statusNot eligible for the National Register of Historic Places
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$2.1 million (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was 236th Ave SE over Newaukum Creek built?

It was built in 1927, making it 98 years old in 2025. It was reconstructed in 1955.

What condition is 236th Ave SE 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 236th Ave SE over Newaukum Creek carry?

About 520 vehicles per day (2019 count), of which roughly 1% are trucks.

How long is 236th Ave SE over Newaukum Creek?

The structure is 49 ft (14.9 m) long with a longest span of 16 ft (4.9 m) and a deck 30 ft wide.

Who owns 236th Ave SE over Newaukum Creek?

It is owned by the County Highway Agency.