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. � <br /> James H. Parker, Advance Surveying & Engineering Company <br /> December 28, 1987 <br /> Page 2 of 2 <br /> 4. I would note that based on the existing slopes and double rock-bed <br /> design, if the rock beds were properly oriented with the contours, the <br /> design downslope dike width would approach 30' and be extending <br /> outside of the property boundaries. Based on the proposed house <br /> Iocation, it would seem impossible to construct a properly designed <br /> mound system within the property boundaries while still leaving a <br /> suitable secondary site. I doubt whether a secondary site is feasible <br /> rec�ardless of house placement. I would also question where the well <br /> to serve this property might be located. A proposed well location was <br /> not indicated on the site plan. <br /> Regarding a related interpretive issue, I recalZ a phone discussion <br /> with Gene Mullenmeister of your staff requesting information regarding <br /> required setbacks from lakes and ponds. I recall discussing with him the <br /> fact that we require a minimum of 75' of separation from the lake and from <br /> wetlands, but that we are more concerned about the lake setback than the <br /> pond setback. I note that your proposal shows the edge of the rock bed at <br /> 65' from the pond and your nearest dike toe at approximately 50' from that <br /> pond. Upon review of City maps, it appears that this pond is a Designated <br /> Wetland area, hence the 75' setback to the toe of the dike must be <br /> maintained. The only way we would allow less than 75' from this pond is if <br /> that pond was a Type 6 or Type 7 wetland (shrub swamp or wooded swamp) with <br /> no open water. However, our maps indicate this is a �Type 3 marsh with open <br /> water. <br /> I would be happy to meet with you or your representative to discuss <br /> the on-site system possibilities for this property, and to review mound <br /> system design procedures and criteria, so that future mistakes and design <br /> errors can be avoided. <br /> Please contact me at 473-7357 if you wish to set up a meeting. It <br /> might be helpful to have the property owner present. <br /> Sincerely, <br /> �f�" ,�� `� � <br /> U <br /> Michael P. Ga ron, <br /> Asst Planning & Zoning Administrator <br /> MPCA Inspector Certificate #516 <br /> MPG/tln <br /> cc: Lyle Oman, Field Inspector <br /> Thomas J. Jacobs, Building Official <br /> Mark E. Bernhardson, City Administrator <br /> Robert Posthumus, 24200 Natches, Lakeville, MN 55044 <br />