Case Study: Fridley, MN Protects Locke Lake Using V2B1 Stormwater Treatment System
•Case Study: Fridley, MN Protects Locke Lake Using V2B1 Stormwater Treatment System
Residents of Fridley, Minnesota have the geographical fortune of living on the glistening eastern banks of the Mississippi River.
This suburban Minneapolis city also epitomizes the challenges of every modern American municipality: a mushrooming population taxing an aging underground infrastructure combined with government regulations mandating clean environmental practices.
Within Fridley is Rice Creek Way, a residential area developed in 1962. A church and a major County road cutting through the area generate high traffic levels. Drainage from curbs and gutters take in salt and sand used to stabilize winter road conditions.
Stormwater is conveyed through a system that flows to Locke Lake, the upstream end of which has a sedimentation basin area. Fridley, encompassed by the Rice Creek Watershed District, is the final stormwater entry point from a host of other upstream watersheds before it discharges into the Mississippi River.
In 2001, the Rice Creek Watershed District provided Fridley with a grant to install two V2B1 Stormwater Treatment Systems to retrofit Rice Creek Way's stormwater system.
The systems provide primary stormwater treatment using locally available precast concrete manholes. The tangential inlet pipe provides optimum swirl distribution for sediment removal. A four- to five-foot deep sump provides ample
sediment storage. Treated surface water enters a floatables chamber where floating oil and organic debris is trapped by a baffle wall. An underflow opening in the bottom of the baffle wall directs flow to the system outlet pipe.
•Case Study: Fridley, MN Protects Locke Lake Using V2B1 Stormwater Treatment System