US Bridges

74th Ave NE over Prairie Creek

Good

Snohomish County, Washington · 0.30 SW JCT SR9 · Structure no. 089256000000000

Built
2013
12 years old
Condition
Good
inspected September 2024
Type
Culvert
Aluminum, Wrought Iron, or Cast Iron
Length
34 ft
1 main span
Daily traffic
836
2024 count
Owner
City
City or Municipal Highway Agency

About this bridge

74th Ave NE over Prairie Creek is a aluminum, wrought iron, or cast iron culvert carrying 74th Ave NE over Prairie Creek in Snohomish County, Washington. It was built in 2013, so it is 12 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 836 vehicles a day, roughly 19% of them trucks, projected to reach 3,000 by 2046. The structure is 34 ft (10.5 m) long. If it were closed, the detour would be 1.9 mi (3 km).

Carries74th Ave NE
CrossesPrairie Creek
Location0.30 SW JCT SR9
RouteCity Street 74
Coordinates48.17829, -122.1309
Functional classUrban Local

Condition and inspection

Good

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

ComponentRatingMeaning
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert8 Very GoodNo problems noted.
Last inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating47.5 US tons
Inventory rating36.8 US tons

Structure

Structure typeCulvert
MaterialAluminum, Wrought Iron, or Cast Iron
DeckNot applicable
Main spans1
Design loadHS 25 or greater
Structure length34 ft (10.5 m)
Longest span34 ft (10.5 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic836 (2024)
Projected traffic3,000 by 2046
Trucks19%
Lanes on structure3
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
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$2.1 million (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was 74th Ave NE over Prairie Creek built?

It was built in 2013, making it 12 years old in 2025.

What condition is 74th Ave NE over Prairie 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 September 2024.

How much traffic does 74th Ave NE over Prairie Creek carry?

About 836 vehicles per day (2024 count), of which roughly 19% are trucks.

How long is 74th Ave NE over Prairie Creek?

The structure is 34 ft (10.5 m) long with a longest span of 34 ft (10.5 m).

Who owns 74th Ave NE over Prairie Creek?

It is owned by the City or Municipal Highway Agency.