2008-08-06 P & R Packet - Laserfiche WebLink

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Page 1 of2 Kim Stephan From: Wayne LeBlanc (wayneleblanc@comcast.net] Sent: Tuesday, July 29, 2008 11 :08 AM To: skseeley@yahoo.com; 'Dan & Mary Capra'; kstephan@centervillemn.com Subject: Tmdl Meet, July 31, 7pm, Uno Lakes City Hall Attachments: IMG_7167algae.JPG; image001.jpg Hello Centerville people, You might be interested in this Tmdl meeting, Thursday, July 3 J, 7pm, at Lino Lakes city hall. Perhaps you could inform Park and Rec. I've added some related information below that many may not know. Thanks. Wayne LeBlanc wayneleb lanc@comcast.net 1677 Peltier Lake Drive Centerville, Mn 55038 651-426-0168 home 651-785-3775 cell Troubled Waters at Peltier Lake On July 31, at 7pm Lino Lakes City Hall. a meeting will discuss MPCA designated impaired waters including Peltier lake and other lakes in the Rice Creek "Chain of Lakes." What are those weeds in Peltier Lake? Why is the lake sometimes so rotten? The frrst thing an aquatic biologist will say is those are not weeds, those are aquatic plants, specifically, CurlyleafPondweed (Potamogeton crispus), Eurasian Watermilfoil (Myriophyllum spicatum), Coontail (Ceratophyllum demersum), and others. The biggest problem appears to be the Curlyleaf. It's an exotic and grows earlier than native species so it becomes dominant. In late June with warmer water, it dies and releases nutrients into the lake. But before it dies, it releases millions of seeds called turions that get ready to grow the next year. Another part of the problem may be what's called internal loading - nutrients in the sediments that get released in various ways. ~'}J'~,;,;~' Algae (image at left) loves the nutrients from the decomposing Curly leaf and so it blooms in huge quantities creating scum and smell. The algae blocks the light and tends to knock back all submerged aquatic plants, even the milfoil. Aphanizomenon is one common prolific algae in the lake and looks like fingernail clippings. So the south part of Peltier Lake has a vicious cycle where Curly leaf and algae help each other create an environment that discourages anything else from taking hold. A lake should have beneficial aquatic plants to avoid algae blooms. (That's why the lake looks so good in the spring.) Another player in the lake is Eurasian Watermilfoil. This exotic first appeared in 2000 and has been expanding its presence in the lake ever since. Every year it seems to roughly double but the algae in July knocks it back quite a bit. But it is still there hanging on till next year's clear spring waters. The lake is so bad, not even Eurasian Watermilfoil grows well. The future may see more Milfoil. The north part of the lake had mostly native beneficial Coontail acting as a giant nutrient absorbing buffer, but :..;.. 7/31/2008