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Page 2 <br />April 3, 1987 <br />b) Once the mound is completed, fill and grading must <br />take place that will channel the runoff from the north <br />to go around the base of the mound at least 20' <br />aasterly of the toe of the sand bed. I will be happy <br />to work with your septic contractor and site grading <br />contractor so they understand what is required. <br />c) The alternate site which is an area between 10' and <br />40' from your west line and about 70' long running <br />north -south, must not be filled or disturbed in any way <br />that might make it unsuitable for future use. <br />d) Prior to excavation for the basement, you must rope <br />or fence off the primary drainfield site and inform <br />your excavator of its location so that it remains <br />undisturbed during construction. We will provide you <br />with "Keep Off Drainfield" signs if you request them. <br />3. Site Grading and Drainage - as we have discussed, certain <br />measures will be required in order to preserve the drainage <br />system which was constructed as part of the Farview <br />sui,.:lvision, as follows: <br />a) A storage basin of 5000 cubic feet must be provided <br />Just north of the berm/culvert near the southeast <br />corner of the lot. The contours and elevations shown <br />in the grading sketch you submitted appear to <br />adequately provide that required storage. You may wish <br />to move the pond even further south given the driveway <br />location enproved by Pennepin County. If so, the <br />existing culvert and berm may be removed and replaced <br />with similarly elevated driveway berm and culvert as <br />shown on the attached sketch. <br />b) The swale that currently crosses Lot 11 and <br />discharges to your basin area must be maintained; you <br />may regrade so that it swings further out from your <br />house if need be, but it must still provide a positive <br />downward grade to your basin. To accomplish this, you <br />may or may not have to put a culvert under your <br />driveway, depending on the driveway elevation at that <br />point. <br />c) Again, as part of the protection of the septic <br />system, fill must be placed east of the septic system <br />and we recommend the drainage past the system be <br />channelized to make sure it flows to the basin you are <br />creating. <br />