US Bridges

124th Ave SE over Storwater Facility

Good

King County, Washington · 0.5 S HWY 520 · Structure no. 089524000000000

Built
2021
4 years old
Condition
Good
inspected June 2024
Type
Culvert
Concrete
Length
156 ft
1 main span
Daily traffic
6,597
2022 count
Owner
City
City or Municipal Highway Agency

About this bridge

124th Ave SE over Storwater Facility is a concrete culvert carrying 124th Ave SE over Storwater Facility in King County, Washington. It was built in 2021, so it is 4 years old, younger 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 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 6,597 vehicles a day, roughly 14% of them trucks, projected to reach 2,042 by 8241. The structure is 156 ft (47.5 m) long. If it were closed, the detour would be 1.9 mi (3 km).

Carries124th Ave SE
CrossesStorwater Facility
Location0.5 S HWY 520
RouteCity Street 75
Coordinates47.62478, -122.175
Functional classUrban Minor Arterial

Condition and inspection

Good

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

ComponentRatingMeaning
Culvert8 Very GoodNo problems noted.
Last inspectionJune 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation8: Equal to present desirable criteria
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating60.7 US tons
Inventory rating46.4 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans1
Design loadHS 20 + Mod
Structure length156 ft (47.5 m)
Longest span156 ft (47.5 m)
Deck width0 ft (0 m)
Roadway width58 ft (17.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic6,597 (2022)
Projected traffic2,042 by 8241
Trucks14%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesOther
Detour if closed1.9 mi (3 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$4.4 million (2022 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was 124th Ave SE over Storwater Facility built?

It was built in 2021, making it 4 years old in 2025.

What condition is 124th Ave SE over Storwater Facility 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 June 2024.

How much traffic does 124th Ave SE over Storwater Facility carry?

About 6,597 vehicles per day (2022 count), of which roughly 14% are trucks.

How long is 124th Ave SE over Storwater Facility?

The structure is 156 ft (47.5 m) long with a longest span of 156 ft (47.5 m).

Who owns 124th Ave SE over Storwater Facility?

It is owned by the City or Municipal Highway Agency.