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determined based on their concentrations. Mr. Welling noted research by the Army Corps of <br />Engineers indicated that a higher level of concentration of parts /million was more effective, and <br />that manufacturers needed to provide more explanation on the application and concentration <br />levels recommended for the most effective approach. Mr. Welling provided several examples <br />where significant eradication was achieved (several bays on Lake Minnetonka), and how those <br />examples may apply or be of interest for the GLWMO. Mr. Welling reiterated that each year <br />brought a new learning curve on herbicide use; and that the MN DNR currently funded and /or <br />supported a number of bay -wide or lake -wide treatments; with 2010 serving as the third year for <br />the treatment program. Mr. Welling noted new herbicides, or mixtures of them, found to be <br />more effective, including liquid Tricloypr and Endothall, with some treatments causing more <br />impact to native plants, and with the exposure time impacting results. <br />Karen Eckman <br />Ms. Eckman noted the trade -offs in having substantially diminished water quality or impacts of <br />eradicating Eurasian Water Milfoil. <br />Mr. Welling concurred, noting that was what lake management was all about; and offered the <br />DNR's willingness to work with citizens and/or lake associations, as well as water management <br />organizations and watershed districts and other groups, to address tensions between controlling <br />aggressive species versus dealing with water quality and native plant damage concerns. <br />Edward Roberts <br />Mr. Roberts questioned whether pursuing a grant limited permitting processes for other <br />vegetation treatments. <br />Mr. Welling responded affirmatively, noting that if the DNR was going to invest in invasive <br />treatment, they were not supportive of removal of more than the minimal amount of native <br />vegetation required for access; and that this necessitated development of a plan prior to receipt of <br />funds, specifying limitations for control of native species. <br />Joan Manzara <br />Ms. Manzara questioned the availability of DNR resources for concerned citizen groups to <br />reference lake parameters and determine what would be appropriate, suggesting having data <br />seemed significant for decision making on where or to what extent treatment was applied. <br />Mr. Welling responded affirmatively, noting that Ms. Brittany Hummel was the DNR's resource <br />person for permits in the metropolitan area, noting that whether treatment was funded through <br />the DNR or not, a permit was required, along with a rough plan indicating the type, extent, and <br />location for treatment. <br />Len Ferrington <br />Chair Ferrington noted that, based on current knowledge, recent vegetation studies and previous <br />discussions, some conversations had already been made with Ms. Hummel. <br />4 <br />