Initial expectations were to treat 34 areas totaling 9.83 acres with liquid or granular 2, 4-D (Navigate/Sculpin G/DMA4) at concentrations of 3-4pp (Figure 3) (Appendix I). Unfortunately, the pretreatment survey found that EWM was more widespread than expected. Because of this, the treatment was revised to include 21 areas covering 15.27 acres (Table 1). This treatment was conducted by Dale Dressel - Northern Aquatics Services (NAS) on June 25th. Based on additional documents provided by NAS, three additional herbicide treatments covering 2.05 acres and 223 individual “spots” occurred on July 15, August 20th, and September 30th (Table 1).

Initial expectations were to treat 12 areas totaling 7.02 acres with liquid or granular 2, 4-D (Navigate) at a concentration of 1.5-3ppm (Figure 3) (Appendix I). The pretreatment survey revealed that, although EWM was patchy, it was found on point or inter-point in all areas. Because of this, it was decided to maintain all treatment areas as initially proposed (Table 1). This treatment was conducted by Northern Aquatics Services (Dale Dressel) on July 8th.

Initial expectations were to treat 16 areas totaling 21.10 acres with granular 2, 4-D (Navigate) at a concentration of 1.5 ppm (Table 1). The pretreatment survey revealed that, although EWM was patchy, it was found on point or interpoint in all areas. Because of this, it was decided to maintain all treatment areas as proposed. This initial treatment was conducted by Northern Aquatics Services on June 18th (Figure 3) (Appendix I). On June 28th, 189 spot treatments in the “S” areas added two additional acres to this total. Following the posttreatment survey, a July 30 spot treatment of 43 spots located throughout the lake covered 0.25 acres. This was followed by another 51 spots covering 0.50 acres on September 5th.

Summary Report

Shoreland Monitoring, Assessment or Inventory