Consultant's Report - Minnesota State Legislature

MINNESOTA DEPARTMENT OF NATURAL RESOURCES
Feasibility Study to Limit the Spread ofZebra Mussels from Ossawinnamakee Lake
Based on the results of the prioritization matrix analyses (see Table VI-I), there are several
treatment alternatives that could be implemented as spot treatments. It is believed, however, that
chemical treatment alternatives utilized proactively are most likely the best alternative for
limiting the growth ofjuvenile or adult populations (see Table B-1 in Appendix B for a list of
chemicals). For example, the proprietary activated starch reagent developed by Barldey
Distribution, LLC. could be advantageous, if the high efficiencies and low environmental
impacts documented by the manufacturer can be achieved in the lake and/or brook. Ozone could
also be a viable option if high capital and/or operational costs can be managed. The spot
treatment locations could include Muskie Bay but also other areas ofthe lake where populations
have become established. Figure VI-2 displays the potential treatment area for population
control at this time, but this area could be expanded to incorporate other established populations
ifneeded.
OUtlet
Structure···
Pellcen
aro"k --
Figure VI-2. Population Control Area
Summary
LEGEND
DWATER SURFACE
CJ TREAlMENT AREA
FIGURE VI..2
Objective 1 incorporates established zebra mussel monitoring and education strategies that
should be continued to the greatest extent possible by MN DNR, Minnesota Sea-Grant, and the
local public. This objective is key to the successful reduction of zebra mussels downstream of
VI-14 Alternatives Analysis and Recommendations