2011-09-22_AgendaPacket - Laserfiche WebLink

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651 Hale Avenue No no Oakdale, Minnesota 55128 telephone: 651.]]0.8448 facsimi l e: 651.]]0.2552 www.eorinc.com Based on the recommendations of the FAA and other previously conducted studies and the fact that the water quality monitoring data shows improved conditions in Lake Owasso since water quality reached its lowest point in 2005, the GLWMO is taking an adaptive management approach to solving the water quality issues in Lake Owasso, with the goal of preventing future cycles of poor water quality. From approximately 2004 through 2006, the lake did not meet the state's water quality standards and did not meet the GL WMO's transparency goal from 2004 through 2007 (see Figure 14 from the draft plan). If the lake returns to these poorer water quality conditions, it may be designated as impaired by the State of MN, which would trigger a new water quality study and likely regulatory requirements for load reductions by the watershed sources. In the event of a water quality study to address an impaired designation, all types of management activities would again be considered, including in -lake measures such as protecting the shorelines, the aquatic vegetation, and the sediments from disturbance. At this point in time, the GLWMO's adaptive management approach prioritizes Implementation Activities in the following manner: Conduct the Watershed Restoration and Protection Plan (formerly referred to as a TMDL and TMDL Implementation Plan) to address impairments on Lake Bennett, Lake Emily, Lake Judy and Shoreview Lake. This study will also evaluate restoration needs for other waterbodies in the Lake Owasso watershed (but will not evaluate internal loading in Lake Owasso) and protection needs for the northern portion of the watershed. This activity would occur in the first three years of the GLWMO 2011 Watershed Management Plan: 2012 -2014. Address external loads by conducting subwatershed assessments (to better locate BMPs), evaluate carp stuff, etc... These activities would occur in the next three to five years of the GLWMO 2011 Watershed Management Plan : 2015 -2019. Evaluate the need to address internal loads. These activities would occur in the last three years of the GLWMO 2011 Watershed Management Plan: 2019 -2021. Given this adaptive management approach it should be understood by all that there may come a point in time when the need to address internal loading in Lake Owasso will impact the public financially (e.g. payments for alum treatments to the lake) or by their ability to use the resource as they have done in the past. As the summary of the FAA points out, the phosphoms balance conducted in 2009 indicated that the internal loads were almost the same as the external loads to the lake. Load reductions will need to come from both external and internal phosphorus sources in order to improve the water quality in Lake Owasso C. Review of Existing No -Wake Ordinances The Cities of Roseville and Shoreview as well as the Minnesota Department of Natural Resources have a No Wake Zone Ordinance in effect for Lake Owasso. These ordinances are provided below: Roseville Ordinance: 702.04: NO WAKE ZONE: Except as provided for elsewhere in this Chapter, no person shall operate a motorboat or be towed on water skis or a similar device at greater than a slow -no wake speed within 300 feet of shore. Launching or landing a skier by the most direct route to open water shall be exempt from this provision. (Ord. 1187,9-8-1997) http: / /www. ci .roseville.mn.us /index.ml)x7NID=1695 An Equal Opportunity Affirmative Action Emmons & Olivier Resources, Inc. water I ecology I community