Storm Water Runoff and Filter Backwash Water Reuse Project
St. Anthony Village, MN
The St. Anthony Village water reuse facility is a half million-gallon reservoir located under a stormwater pond. Water stored in the reservoir is recycled to irrigate a 20-acre city hall campus and municipal park site. WSB was retained by the City of St. Anthony Village to complete the design, plans, and specifications for this first of its kind innovative project. In addition, WSB was responsible for construction management, surveying, and construction observation services. The reuse facility provides a multitude of environmental benefits that substantially protect and improve water resources of the region.
The project captures and reuses two primary sources of water that were previously discharged to surface waters. The first source is storm water runoff from 13.5 acres of county road, city streets, and the city hall site. This water, commonly containing pollutants such as phosphorus and total suspended solids, is collected by storm sewer and drained into the storage reservoir. The second source of water is filter backwash water, which is a waste byproduct of the City’s water treatment process. Approximately 75,000 gallons of water are used weekly to clean the excess iron and manganese from the filters.
Prior to the project, the pollutants and runoff volumes from these two sources of water were discharged to Mirror Lake and the Mississippi River. This project captures these previous waste products in a reservoir so that the water can be reused for irrigation purposes. The filtering process that irrigation provides helps to eliminate discharging pollutants and excess volumes to the downstream receiving waters. Using this system reduces the City’s irrigation costs, substantially reduces the need to use groundwater resources, and eliminates the previous six million gallons of potable water needed for watering.
Project Awards:
- 2009-2010 Minnesota Governor’s Award for Pollution Prevention
- 2010 ACEC/MN Engineering Excellence Grand Award
- 2009 LMC City of Excellence Award: Population 5,000 - 19,999
- 2009 MPWA Project of the Year – Honorable Mention
- 2008 CEAM Municipal Project of the Year – Honorable Mention
Client: City of St. Anthony Village
Completion: 2008
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