US Bridges

Covington-Swyr RD over Jenkins Creek

Fair

King County, Washington · 0.7 MI SE of SR-516 · Structure no. 084834000000000

Built
1929
96 years old
Condition
Fair
inspected July 2023
Type
Slab
Concrete Continuous
Length
49 ft
3 main spans
Daily traffic
15,015
2019 count
Owner
County
County Highway Agency

About this bridge

Covington-Swyr RD over Jenkins Creek is a concrete continuous slab carrying Covington-Swyr RD over Jenkins Creek in King County, Washington. It was built in 1929, so it is 96 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 15,015 vehicles a day, roughly 1% of them trucks, projected to reach 27,120 by 2039. The structure is 49 ft (14.9 m) long and 24 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesCovington-Swyr RD
CrossesJenkins Creek
Location0.7 MI SE of SR-516
RouteCounty Highway 91581
CountyKing County
StateWashington
Coordinates47.34897, -122.11672
Functional classUrban Minor Arterial

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
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating38.9 US tons
Inventory rating30 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 15
Structure length49 ft (14.9 m)
Longest span15 ft (4.6 m)
Deck width24 ft (7.3 m)
Roadway width23 ft (6.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic15,015 (2019)
Projected traffic27,120 by 2039
Trucks1%
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 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 Covington-Swyr RD over Jenkins Creek built?

It was built in 1929, making it 96 years old in 2025.

What condition is Covington-Swyr RD over Jenkins 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 Covington-Swyr RD over Jenkins Creek carry?

About 15,015 vehicles per day (2019 count), of which roughly 1% are trucks.

How long is Covington-Swyr RD over Jenkins Creek?

The structure is 49 ft (14.9 m) long with a longest span of 15 ft (4.6 m) and a deck 24 ft wide.

Who owns Covington-Swyr RD over Jenkins Creek?

It is owned by the County Highway Agency.