US Bridges

Avondale Pl NE over Bear Creek

Fair

King County, Washington · 4.75 MI E of SR-405 · Structure no. 084034000000000

Built
1950
75 years old
Condition
Fair
inspected August 2024
Type
Stringer/Multi-beam or Girder
Concrete Continuous
Length
45 ft
3 main spans
Daily traffic
135
2020 count
Owner
County
County Highway Agency

About this bridge

Avondale Pl NE over Bear Creek is a concrete continuous stringer/multi-beam or girder carrying Avondale Pl NE over Bear 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 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 135 vehicles a day, roughly 10% of them trucks, projected to reach 165 by 2040. The structure is 45 ft (13.7 m) long and 30 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesAvondale Pl NE
CrossesBear Creek
Location4.75 MI E of SR-405
RouteCounty Highway 67030
Coordinates47.70664, -122.08944
Functional classUrban 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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionAugust 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourCountermeasures installed to correct a previously existing problem
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 adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating30.3 US tons
Inventory rating21.8 US tons

Structure

MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length45 ft (13.7 m)
Longest span25 ft (7.6 m)
Deck width30 ft (9.1 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic135 (2020)
Projected traffic165 by 2040
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 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$2 million (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Avondale Pl NE over Bear Creek built?

It was built in 1950, making it 75 years old in 2025.

What condition is Avondale Pl NE over Bear 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 August 2024.

How much traffic does Avondale Pl NE over Bear Creek carry?

About 135 vehicles per day (2020 count), of which roughly 10% are trucks.

How long is Avondale Pl NE over Bear Creek?

The structure is 45 ft (13.7 m) long with a longest span of 25 ft (7.6 m) and a deck 30 ft wide.

Who owns Avondale Pl NE over Bear Creek?

It is owned by the County Highway Agency.