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<br />. <br /> <br />The Honorable Mayor and City Council <br />October 21, 1993 <br />Page Two <br /> <br />2. Regional Pond Outlet <br /> <br />As the attached report indicates, we are still waiting for an answer from the DNR <br />relative to the amount of "bounce" which will be allowed in the regional pond. We are <br />requested that the DNR allow a bounce equal to the rise in water due to a 1oo-year event <br />under existing conditions. This would result in the smallest diameter pipe outlet from <br />the regional pond. If they do not allow this, the pipe size outletting the pond will need <br />to be increased. <br /> <br />Another key issue with this area will be the timing of the construction of the outlet. We <br />are hopeful that the DNR will not require this outlet to be in place prior to the <br />construction of the first phase of the Elk Park Center. We understand that approximately <br />2/3 of the total development will be constructed in the first phase. We believe that <br />through providing additional ponding onsite in the areas not developed in the first phase, <br />the need for the outlet from the regional pond can be postponed. Obviously the outlet <br />from the regional pond will need to be in place prior to full development of Elk Park <br />Center. <br /> <br />e <br /> <br />3. Deschenes/Schultz Area <br /> <br />The proposed improvements for this area provide for pipe sizes capable of handling full <br />development of the property's tributary to this location. As outlined in the <br />Comprehensive Drainage Plan, the area also will ultimately need to provide a fairly large <br />regional pond. The two main issues with this area are first, easements will need to be <br />acquired for the construction of these storm sewer lines. Secondly, it is unlikely that <br />location of the storm sewer lines will work well when these areas are ultimately <br />developed. However, at that time, it would seem reasonable that it would be the <br />developer's responsibility to reconstruct storm sewer lines to fit their development plans. <br />It is possible to take the storm sewer pipes and reuse them through the redevelopment <br />of the area. <br /> <br />I will be in attendance at Monday evening's City Council meeting to explain these three areas <br />in greater detail and answer any questions you may have. <br /> <br />Sincerely, <br /> <br />MSA, CONSULTING ENGINEERS <br /> <br />e <br /> <br />~p~< <br /> <br />Terry I. Maurer, P.E. <br /> <br />TJM:ds <br /> <br />161-2105.OCT <br />