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To: Lake Elmo City Council <br />Lake Elmo City Administrator <br />From Wyn John <br />Subject: Valley Branch Watershed District Meeting - May 5, 1994 <br />Date: May 17,1994 <br />This was a special meeting of the VBWD to discuss the potential alum <br />treatment of Olsen Lake Estates Pond. <br />President Zetterberg opened the meeting by announcing that as of May 3, <br />the pond level was at Elevation 962.3. Also, that the level of Long Lake was <br />up 31 inches from the previous week. <br />They had had a response from PCA and BWSR stating that it would.be best if <br />OLE Pond could be brought back to its correct level. Because of recent rains, <br />and the liklihood of more, it was likely that they would have to discharge the <br />pond water before June, to protect property. At the last meeting the <br />managers voted to test the pond, and depending on the result, debate the <br />need for a one time alum treatment of the pond water. <br />( Since the previous meeting, President Zetterberg had worked with Barr <br />Engineering. The company used by the PCA for alum treatment happened to <br />be available on May 6 and 7, but not again for about a month. The VBWD. <br />would need a permit for the alum treatment from the DNR and for the <br />discharge. He had had verbal agreement that following submittal of a permit <br />request, the discharge could take place and that the permit process could <br />proceed. A letter had been sent to the DNR indicating their intent, and he <br />expected to get a FAX approval from the DNR contingent on completion of <br />testing. These tests related to measuring Ph, turbidity, and phosphorus <br />levels while discharging. Once the pond is treated with alum, it is likely that <br />the DNR (Fish and Biological) would give approval to the discharge. <br />Mr. Brenner wondered whether there was a possibility that the water <br />quality could deteriorate within two days after treatment, so rendering the <br />treatment ineffective. President Zetterberg responded that it would depend <br />on the quality of the inflow water. <br />The costs of the tests and treatments were discussed. Each of the tests on <br />May 4 and May 9 (after potential treatment), would cost $360. The alum <br />application, originally estimated as $4500, assumed the pond would be at <br />