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Tanners Lake Water Quality Improvement Project

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The Tanners Lake Water Quality Improvement Project in the Ramsey-Washington Metro Watershed District (RWMWD) has been awarded the 1999 first place award in the municipal category from the U.S. EPA NPDES Stormwater Control Excellence Award Program. This flyer provides a description of the project history, study findings, implementation recommendations and current status.

Key elements of this program include the construction of three stormwater treatment basins, implementation of a watershed education program, and completion of an Alum injection system for removal of phosphorus from stormwater. Although use of alum treatment for water treatment and purification is not a new technology, its application to stormwater management is still a developing technology. The RWMWD application has several unique features: its design to address treatment of base stream flows, storm event flows, and seasonal changes in stormwater temperature and pH; its off-line system design; its thorough bench testing to address dosing for optimal phosphorus removal under various conditions; and, its design to comply with specific dissolved and total aluminum discharge standards.

Document Type: Research Article


Publication date: 2000-01-01

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