US Bridges

Main ST over Stormwater Facility

Good

King County, Washington · 0.01 W JCT 151 Pl · Structure no. 089280000000000

Built
2021
4 years old
Condition
Good
inspected September 2023
Type
Culvert
Concrete
Length
89 ft
7 main spans
Daily traffic
13,683
2021 count
Owner
City
City or Municipal Highway Agency

About this bridge

Main ST over Stormwater Facility is a concrete culvert carrying Main ST over Stormwater 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 13,683 vehicles a day, roughly 2% of them trucks, projected to reach 15,000 by 2041. The structure is 89 ft (27.1 m) long and 13 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

CarriesMain ST
CrossesStormwater Facility
Location0.01 W JCT 151 Pl
RouteCity Street 2026
Coordinates47.60985, -122.13804
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
Culvert8 Very GoodNo problems noted.
Last inspectionSeptember 2023
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 rating106.8 US tons
Inventory rating106.8 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans7
Design loadHL 93
Structure length89 ft (27.1 m)
Longest span16 ft (4.9 m)
Deck width13 ft (4.1 m)
Roadway width86 ft (26.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic13,683 (2021)
Projected traffic15,000 by 2041
Trucks2%
Lanes on structure1
Traffic directionOne-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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$2.4 million (2022 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was Main ST over Stormwater Facility built?

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

What condition is Main ST over Stormwater 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 September 2023.

How much traffic does Main ST over Stormwater Facility carry?

About 13,683 vehicles per day (2021 count), of which roughly 2% are trucks.

How long is Main ST over Stormwater Facility?

The structure is 89 ft (27.1 m) long with a longest span of 16 ft (4.9 m) and a deck 13 ft wide.

Who owns Main ST over Stormwater Facility?

It is owned by the City or Municipal Highway Agency.