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Table 1. Round Lake Acreage based on Bathymetry Data 1 <br />ElevationMaximum Wetted % of Volume 2 CumulativeComments 2 <br />2 <br />DepthAreaBasin Volume <br />2 <br />Wetted <br />(ft. msl)(ft.)(acres)(percent)(ac. ft.)(ac. ft.) <br />890.024.6126100222832Water elevationat <br />time of purchase; <br />approx. upper range <br />of active water <br />management. <br />889.023.612095117610 <br />888.022.611490110493 <br />887.020.610785103383Existing water control <br />structure sill <br />886.020.6997991280 <br />885.019.6836668189Minimum observed& <br />documented during <br />droughts <br />884.018.6534240121 <br />883.017.626201981Light penetration <br />with water elev. <br />@887.0 <br />882.016.614111262 <br />881.015.61191050 <br />880.014.69.27940 <br />879.013.67.661231 <br />877.011.65.24919 <br />875.09.63.335.110 <br />873.07.62.023.24.9 <br />871.05.61.1<11.41.7 <br />869.03.60.3<10.30.3 <br />865.400.0000.0 <br />1 <br />Source: Analysis by Wenck Associates, Inc. (2012)of contour map identified as Figure 4 in <br />this report. <br />2 <br />Added by USFWS <br />of the substrate (Wenck 2011). Samples from deeper in the substrate show less muck and more <br />silt and sand.This buildup of muck and peat is consistent with what would be expected with <br />prolonged stable water levels that do not go through a low water or drought cycle which enables <br />dead vegetation to consolidate or oxidize when dried out. <br />During a lake survey in 1978, Joarnt and Kenow noted that emergent (10 –20% of locations) or <br />submergent (70 –80% of locations) plant species were observed at 90% of their sampling <br />locations. They found submergent plants in water over 6 ft. deep (correlating to a bottom <br />8/6/2013 9 USFWS RLMP <br />