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NEWS RELEASE <br />From: Freshwater Society <br />Navarre, Minnesota <br />Contact: Paula Ripley <br />Telephone: 471-8407 <br />FEB ? n 1985 i <br />CITY F <br />RELEASE: I , <br />All Lake Minnetonka Editions <br />Date: February 15, 1985 <br />LAKE MINNETONKA WATER QUALITY PROGRAM <br />The use of copper sulfate in Lake Minnetonka, the impact of sewage diversion projects <br />and comparisons of past and present water quality will be some of the topics addressed <br />at a seminar to be held Tuesday, March 5, 7:30-9:30 p.m. at the Gray Freshwater <br />Biological Institute. <br />The program, "A Historical View of Water Quality in Lake Minnetonka," is sponsored by <br />the Institute, the Freshwater Society and co -sponsored with the Minnetonka, Orono, <br />Wayzata and Westonka Community Services/Education Departments. <br />Dr. Edward Swain of the Institute will discuss water quality data in 1982 ak v4wlpx;,Qd <br />to data from 1969, focusing on the impact of the sewage diversion projects al <br />the lake initiated and completed during that time and their effect on water quality• <br />and lake ecology. Dr. Swain will also discuss water quality in areas such as West <br />Arm and Jennings Bay, where sewage diversions are under consideration, but not <br />completed. <br />Dr. Swain will also discuss the pros and cons of the use of copper sulfate based <br />on the 3-year, $200,000 study he is conducting on Lake Minnetonka to study the effects <br />of copper sulfate, including its impact on algae and other animals, the residual <br />effectiveness of such treatments and the impacts on water quality. <br />His study, "The Effects of Copper Sulfate on Lakes," funded by the Freshwater <br />Foundation and the State of Minnesota, may serve as a model to predict how lakes <br />(more) <br />