4-Year Comparison Milfoil Harvests 8/2015

Sandy Point :  This area is limited in size and has a limited littoral zone with a very sandy substrate.  The bottom drops off quickly leaving a small plant zone with scattered EWM.  Lush growth of Nymphaea (white pond lily) in the shallows reduces EWM area.  With the fluctuating water levels in the lake this section will be an area of limited growth for milfoil.  On the steep drop off, a thin band of the ledge is conducive to plant propagation.  The area just to the north will also be checked in the upcoming weeks.

Meadow Cove:  Very few EWM plants were observed during this swimover at this location. A single large multi-stemmed plant was removed during observation of this site.  Native plant populations were robust, suggesting good growing medium, depth and nutrient loadings.  This will be a site for constant concern and scouting.  A bottle was left during the swimover for the upcoming plant survey this weekend.

Bay South of Schroon Lake Marina channel:  Several EWM plants were found during a short swim at this site.  Clearing this area of EWM with its fluctuating depths, poor water clarity, numerous plant species and boat traffic as impediments to harvesting will be difficult at best.   At this point our best option is to continue to have the area picked throughout the harvesting period.

ADDED NOTES:  Weekly harvesting totals for M. spicatum by AIM, LLC in Schroon Lake from 2012-week# 3 2015 are as follows:

Harvest periods: 2012 (Weeks 1-4)

  1.  120 man/hours    8.5 bags  212.5  pounds or 1.8 pounds/hr
  2.  120 man/hours    2.5 bags    62.5  pounds or 0.5 pounds/hr
  3.  120 man/hours  21.0 bags  525.0  pounds or 4.4 pounds/hr
  4.  120 man/hours    3.0 bags    75.0  pounds or 0.6 pounds/hr

Totals: 480 man/hours  875.0 pounds or 1.8 pounds/hr

Harvest Periods: 2013 (Weeks 1-5)

  1.  120 man/hours    18.25 bags    456.25 pounds or  3.8 pounds/hr
  2.  120 man/hours    32.00 bags    800.00 pounds or  6.7 pounds/hr
  3.  120 man/hours    11.13 bags    278.00 pounds or  2.3 pounds/hr
  4.  120 man/hours      8.25 bags    206.25 pounds or  1.7 pounds/hr
  5.  240 man/hours    17.50 bags    437.50  pounds or 1.8 pounds/hr

Totals: 720 man/hours      87.13 bags    2,178 pounds or   3.0 pounds/hr

Harvest Periods: 2014 (Weeks 1-4)

  1. 120 man/hours 3.75 bags       93.8  pounds or .78 pounds/hr
  2. 120 man/hours 8.25 bags     206.3  pounds or 1.7 pounds/hr
  3. 120 man/hours  12.5 bags     312     pounds or 2.6  pounds/hr
  4. 120 man/hours  10.25 bags    256.3  pounds or  2.1 pounds/hr

Totals: 480 man/hours  868.3 pounds or 1.8 pounds/hr

Harvest Periods: 2015 (Weeks 1-3)

  1. 120 man/hours 3 bags          75    pounds or     .63   pounds/hr
  2. 120 man/hours 3 bags          75    pounds or     .63   pounds/hr
  3. 120 man/hours 17.5 bags     437.5 pounds or   3.64   pounds/hr

Totals: 360 man/hours  587.5 pounds or 1.63 pounds/hr to date

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