US Bridges

168th Way SE over Covington Creek

Good

King County, Washington · 2.7 MI E of SR-18 · Structure no. 081389000000000

Built
1964
61 years old, rebuilt 2004
Condition
Good
inspected May 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete Continuous
Length
195 ft
1 main span
Daily traffic
1,080
2019 count
Owner
County
County Highway Agency

About this bridge

168th Way SE over Covington Creek is a prestressed concrete continuous stringer/multi-beam or girder carrying 168th Way SE over Covington Creek in King County, Washington. It was built in 1964 and reconstructed in 2004, so it is 61 years old, older than the Washington average of 49.8 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 1,080 vehicles a day, roughly 2% of them trucks, projected to reach 1,700 by 2042. The structure is 195 ft (59.4 m) long and 26 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Carries168th Way SE
CrossesCovington Creek
Location2.7 MI E of SR-18
RouteCounty Highway 33330
Coordinates47.31933, -122.11942
Functional classUrban Collector

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionMay 2023
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 geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating35.4 US tons
Inventory rating18.5 US tons

Structure

MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans1 (+3 approach)
Design loadHS 20
Structure length195 ft (59.4 m)
Longest span60 ft (18.3 m)
Deck width26 ft (7.9 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,080 (2019)
Projected traffic1,700 by 2042
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 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$7.4 million (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was 168th Way SE over Covington Creek built?

It was built in 1964, making it 61 years old in 2025. It was reconstructed in 2004.

What condition is 168th Way SE over Covington Creek in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in May 2023.

How much traffic does 168th Way SE over Covington Creek carry?

About 1,080 vehicles per day (2019 count), of which roughly 2% are trucks.

How long is 168th Way SE over Covington Creek?

The structure is 195 ft (59.4 m) long with a longest span of 60 ft (18.3 m) and a deck 26 ft wide.

Who owns 168th Way SE over Covington Creek?

It is owned by the County Highway Agency.