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memo 2of14 discussed by the GLWMO Board of Commissioners at their September 22, 2011 Board Meeting. In order to respond to these comments, the following information is presented in this memorandum: A. References to No -Wake zone in GLWMO DRAFT 2011 Watershed Management Plan B. Intent of Including Implementation Activity in 2011 Watershed Management Plan C. Review of Existing No -Wake Ordinances D. Summary of Public's Comments on Implementation Activity E. Response to Summary of Comments A. References to No -Wake Zone in DRAFT 2011 Watershed Management Plan There are four references to the evaluation of options to address internal loading in Lake Owasso by protecting the shallow portions of the lake: Implementation Activity 1.2 b (page 111) — "Work with member communities to develop options (such as ordinances establishing no -wake zones) protecting shallow areas of sensitive lakes." Implementation Activity 1.9.f (page 114) — "To address internal loading (in Lake Owasso) work with member communities to test the impacts of establishing a no boating area or no -wake zone on certain portions of the lake (e.g. shallow areas) for a defined period of time; the goal being to make it a permanent ordinances if the results are positive." Implementation Plan Table: Third Implementation Activity under Watershed Wide Water Quality /Water Quantity — `Develop options for the protection of shallow portions of sensitive lakes" (to be funded 50% by the GLWMO with a total cost of $5,000 and to begin in 2015 through 2017). Implementation Plan Table: Fourth Implementation Activity under Lake Owasso — "Evaluate impacts of establishing no boating area or no -wake zone on certain portions of lake" (to be funded 50% by the GLWMO costs reflected in previous line item). Whereas the plan does not explicitly define the shallow portions of Lake Owasso, in general depths less than ten to fifteen feet are considered shallow. At these depths, light levels typically support rooted aquatic plant growth. The MPCA defines the littoral zone of a lake as any areas shallower than 15 feet. An investigation into the establishment of a no -wake zone would more precisely define the depths of water that would be addressed. B. Intent of Including Implementation Activity in 2011 Watershed Management Plan The overall intent of the GLWMO 2011 Watershed Management Plan is to lay the framework for the next ten years of activities by building on what has been accomplished to date. In reviewing what has been accomplished to date, the Project Consultant compiled all of the water quality and water quantity data collected since the 2001 Watershed Management Plan to characterize the quality of the GLWMO's water resources. In addition, the Project Consultant reviewed all of the studies completed since the 2001 Watershed Management Plan and incorporated the findings and recommendations of these studies as long as they still were appropriate given the review of the water quality and water quantity data. This particular Implementation Activity was a recommendation of the Lake Owasso Use Attainability Analysis Diagnostic - Feasibility Study: Water Quality Issues and Potential Restorative Measures prepared for the Grass Lake Watershed Management Organization in April 2009 by Barr Engineering. The key product of this analysis was the development of an annual water and phosphorus budget for Lake Owasso, identifying the relative percent contribution of each of the various sources to the annual water and phosphorus loads. These results are presented in the following tables: Emmons & Olivier Resources, Inc. 651 Hale Ave N, Oakdale, MN 55128 p: 651.770.8448 f: 651.770.2552 www.eorinc.com