US Bridges

Mann RD over Haystack Creek

Good

Snohomish County, Washington · 2.6 SE JCT SR2 · Structure no. 089226000000000

Built
2021
4 years old
Condition
Good
inspected September 2023
Type
Culvert
Concrete
Length
21 ft
1 main span
Daily traffic
1,166
2019 count
Owner
County
County Highway Agency

About this bridge

Mann RD over Haystack Creek is a concrete culvert carrying Mann RD over Haystack Creek in Snohomish 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 1,166 vehicles a day, roughly 5% of them trucks, projected to reach 1,500 by 2045. The structure is 21 ft (6.4 m) long. If it were closed, the detour would be 98.8 mi (159 km).

CarriesMann RD
CrossesHaystack Creek
Location2.6 SE JCT SR2
RouteCounty Highway 51100
Coordinates47.84979, -121.77837
Functional classRural 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 protection7 GoodSome minor problems.
Culvert8 Very GoodNo problems noted.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation8: Equal to present desirable criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating60 US tons
Inventory rating46.4 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans1
Design loadHL 93
Structure length21 ft (6.4 m)
Longest span21 ft (6.4 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,166 (2019)
Projected traffic1,500 by 2045
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed98.8 mi (159 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$1.1 million (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Mann RD over Haystack Creek built?

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

What condition is Mann RD over Haystack 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 2023.

How much traffic does Mann RD over Haystack Creek carry?

About 1,166 vehicles per day (2019 count), of which roughly 5% are trucks.

How long is Mann RD over Haystack Creek?

The structure is 21 ft (6.4 m) long with a longest span of 21 ft (6.4 m).

Who owns Mann RD over Haystack Creek?

It is owned by the County Highway Agency.