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Grass Lake Watershed Management Organization SEH Quarterly Consultant Report January 19, 1994 Page 2 3. New in-lake phosphorous-algal bloom and phosl horous transparency rela';~nships should be developed based on all available data to assi~;t the Board in evalu~cting the effectiveness of changing phosphcrous loads on lake response. 2. Lake Water ®uality Planning On January 17, 1995, a meeting of lake managers, the Technical Advisory Committee and SEH staff was conducted to review the first of three draft lake trend reports. The trend analysis is part of Phase I lake planning. The scope of work, schedule and cost per our December 5, 1994 pending Le'-'er Agreement are attached. To date, we have proceeded ~ . _iy into the anaJ~ -is task - : preliminary trend analysis based on available data. However, during development of she Lake Owasso analysis, more questions were raised than answered regarding response in Lake Owasso and regarding establishment of lake goals. Joel Schilling, Senior Scientist - Limnologist, will attend the January 26, 1995 meeting to discuss the findings on Lake Owasso and what recommended management measures should be considered. One of the primary foals at the outset of the project watt to "do something" with all the data that exists, i.e. the tr,.nds analysis. This appears relatively simple, ear ~~pt that the data does not always conform to represent any particular trend. The second goal was to establish in-lake phosphor.::.. goals for each lake. The goal to be worked towards would essentially define future BMPs around the lake as well as future in- take management techniques. During our meetings with area lake managers, there appears to be widely ranging opinions regarding the applicability of goals to lake management. On one side of the argument for target goals are the state 8410 requirements for Second Generation WMO plans (8410..0100 Subpart 3.A.) and future MPCA guidelines for lakes following the "Ecoregion" approach. (The ecoregion approach is based on lakes situated in a similar ecological setting). On the side against specific lake goals is the argument that there are too many infl~,_~nces on the lake to accurately set a target phosphorous level. Instead, managers should do the best they can to limit impacts to the lake. Following the January Board Meeting, the Technical Advisory Committee will reconvene to discuss the Wabasso and Snail lakes and to finalize the Analysis/Report phases of the project. We encourage the attendance of Board members at these meetings.