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NfINUTES OF THE ORONO FLANKING COMNASSION <br />MEETING HELD ON SEPTEMBER 18, <br />(#5 - #2059 Minnehaha Creek Watershed District - Continued) <br />The project has been in the planning stages for the past couple years and is slated to be <br />constructed early 1998 The project will be done in the beginning of January to the <br />beginning of February with re\ egetation and replanting taking place in the spring. <br />Peterson clarified that the project would only occur and be effective if the Deerhill project <br />in Medina is completed Tom LaBounty said the Medina project is in condemnation <br />process at this time He noted that the easements for the other two ponds, one in Long <br />Lake park and the other on the priv ate land, have been completed The object of the I,ong <br />Lake project is to clean up the water discharging ffoin Long Lake to Lake Minnetonka to <br />the corridor to the Mississippi and is part of the ov erall scheme <br />Schroeder asked if there w as anything that would prevent the Deerhill project from being <br />completed LaBounty said he expects an appeal to the condemnation proceeding but <br />expects to have all the permits in hand by the end of September <br />LaBounty cited the Gleason Lake project and the concerns regarding the disposal of <br />materials from the site on Hwy 12 He would like to address the pri>blems relating to this <br />project. <br />LaBounty said contractual agreements have been made with the property owners when <br />asked by Smith Performance stipulations have been set out <br />The alum treatment of Long I.ake will occur after the ponds are completed. The <br />effectiveness of the treatment will depend on how effective the ponds are and their <br />construction LaBounty said alot of the effectiveness depends on the Best Management <br />Practices in the sub-watershed The clarity level would be a progressive improvement. <br />5+’ is expected, which is a radical difference from the 1' clarity presently in Long Lake. <br />When the revegetation is ocurring. the improvement in clarity will hit a flat spot, but will <br />then continue to improve. <br />Hawn asked about the sediment ponds. She was informed that 50% of the phosphorus <br />would be removed by the alum treatment. Hawn questioned whether the remaining 50% <br />would contribute to future water quality problems being created Syverson noted that <br />while the phosphorus removal was believed to be 50%, the sediment removal would be a <br />higher percentage, 80-90% This would result in a significant decrease of sediment to <br />cover the alum. 50% is the typical efficiency found according to Syverson. Further gains <br />would require more ponds and would be too large to be feasible. Syverson said the <br />process is two fold The internal process would recycle the alum which would be taken <br />out and sealed and then more taken out from there resulting in a higher percentage of <br />75%. Reestablishing vegetation then gives the lake a chance to work on its own. The <br />project is a helping hand which allows the lake to work on its own. <br />I