08-13-1990 Council Packet - Laserfiche WebLink

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All permits issued by the District require compliance with applicable municipal ordinances and, if the permit involves docking on Lake Minnetonka, the applicable ordinances of the Lake Minnetonka Conservation District. In addition, permits issued by the watershed district require compliance with any applicable rules of the Minnesota Department of Natural Resources. The Board of Managers also took action as necessary concerning complaints, permit violations, and activities which had been undertaken without a required permit from the District. HYDROLOGIC DATA COLLECTION The District continued its Hydrologic Data Collection Program during 1909. The data for 1988 were published in the Annual Hydrologic Data Report in July 1909. This is a comprehensive program, which, along with data from other agencies, has formed a long-term data bank for use in managing the water resources of the District, particularly Lake Minnetonka and the Minneapolis city lakes. Copies of this report were submitted to the Minnesota Board of Water and Soil R-sources, the Metropolitan Council, the Minnesota Pollution Control Agency, the Department of Natural Resources, the Fresh Water Biological Institute, and local government officials, citizens' groups, and interested citizens. No major changes in water quality occurred during 1989 in Lake Minnetonka, and stream quality in the District also remained essentially unchanged from the prior year. HEAl’IfAIEBJLJDAM-.AHQ. CONTROL STRUCTURE (GRAY*S BAY)__AND_JAKE MINNETONKA ELEVATIONS/MINWEHAHA CREEK FLOWS During 1989, the District operated the Headwaters Control Structure at Gray's Bay u-.ider the management policy and operational plan as reapproved by the Department of Natural Resources in March 1906. The District's application to rer*w the permit for the control structure remained pending before DNR in 1909. Due to exceptionally low precipitation during 1989, and abnormally dry conditions throughout the summer, the level of Lake Minnetonka remained low and the control structure remained closed throughout the year. Lake Minnetonka reached a low elevation of 926.00 on November 3, and a high elevation of 928.20 on April 18. Due to the low lake level (below the established discharge elevation of 928.6), no discharge from the Headwaters Control Structure occurred. The Managers continued to rely heavily upon participation of each of the municipalities on Minnehaha Creek in recording creek elevations and flows and reporting that data to the District. The District prepared monthly summarie*: of this data during the open water season and made the summaries available to interested municipalities and citizens. The assistance of each of the municipalities is invaluable to the District in making the necessary operational adjustments to accomplish the management objectives of the Headwaters Control Structure. - 3 -