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I <br />Secchi Disc Transparencies ~ _1- ~ ~„~`-_ <br />~__~,. <br />-- °°~__ - <br />o - _= - ~~ <br />-_ _ - -__ <br />Categories IV and V_,__ <br />1 I. L- Category 11~ i <br />a ~ I § I ( Cate ory 11 <br />~§ ~ i <br />~2 1 ~ <br />N 3 <br />~4 ~ ~~ ~ I <br />y I 1 ~ Category <br />05 I 1 <br />;= Trendline (1997-200 <br />V No Significant Trend.Lake CIBSSI}ICatlOfl <br />V <br />~ 6 System <br />7 <br />1970 1975 1980 1985 1990 1995 2000 2005 2010 <br />Surface Chlorophyll a Concentrations <br />ao -_ _ <br />J <br />70 <br />C <br />O 60 <br />.~ <br />L <br />~ 50 <br />d <br />V <br />~ 40 <br />V <br />~ 30 <br />A <br />D. 20 <br />O <br />L <br />~ 10 <br />U <br />0 <br />1970 <br />J 180 <br />~ 160 <br />c <br />140 <br />m <br />c 120 <br />N <br />v <br />0 100 <br />U <br />y 80 <br />7 <br />~ 60 <br />sZ <br />z 40 <br />a <br />20 <br />I-° o <br />1975 <br />Surface Total Phosphorus Concentrations <br />Trendline (1997-2006) <br />No Significant Trend <br />TI4 ~ ~ II <br />>t <br />1970 1975 1980 1985 1990 1995 2000 2005 2010 <br />Note: All data points represent the summer average value (± 1 Standard Error). <br />