US Bridges

Cumberlnd-Kanaskat over BNSF RR

Fair

King County, Washington · @ Kanasket Kangley RD · Structure no. 081166000000000

Built
1959
66 years old
Condition
Fair
inspected August 2024
Type
Tee Beam
Concrete Continuous
Length
158 ft
3 main spans
Daily traffic
5,000
2020 count
Owner
County
County Highway Agency

About this bridge

Cumberlnd-Kanaskat over BNSF RR is a concrete continuous tee beam carrying Cumberlnd-Kanaskat over BNSF RR in King County, Washington. It was built in 1959, so it is 66 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 5,000 vehicles a day, roughly 14% of them trucks, projected to reach 8,700 by 2042. The structure is 158 ft (48.2 m) long and 24 ft wide. If it were closed, the detour would be 16.2 mi (26 km).

Location

Open in Google Maps
CarriesCumberlnd-Kanaskat
CrossesBNSF RR
Location@ Kanasket Kangley RD
RouteCounty Highway 93655
CountyKing County
StateWashington
Coordinates47.32875, -121.90762
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionAugust 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry2: Basically intolerable, requiring high priority of replacement
Approach roadway alignment6: Equal to present minimum criteria
Operating rating30.8 US tons
Inventory rating23.6 US tons

Structure

Structure typeTee Beam
MaterialConcrete Continuous
DeckOther
Main spans3
Design loadHS 20
Structure length158 ft (48.2 m)
Longest span60 ft (18.3 m)
Deck width24 ft (7.3 m)
Roadway width23 ft (6.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5,000 (2020)
Projected traffic8,700 by 2042
Trucks14%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesRailroad
Detour if closed16.2 mi (26 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$6.1 million (2022 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was Cumberlnd-Kanaskat over BNSF RR built?

It was built in 1959, making it 66 years old in 2025.

What condition is Cumberlnd-Kanaskat over BNSF RR 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 August 2024.

How much traffic does Cumberlnd-Kanaskat over BNSF RR carry?

About 5,000 vehicles per day (2020 count), of which roughly 14% are trucks.

How long is Cumberlnd-Kanaskat over BNSF RR?

The structure is 158 ft (48.2 m) long with a longest span of 60 ft (18.3 m) and a deck 24 ft wide.

Who owns Cumberlnd-Kanaskat over BNSF RR?

It is owned by the County Highway Agency.