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Calibre Ridge partnership, Case No. 2355 Page 7 Enqineerinq Considerations Most engineering issues have been addressed adequately, but there remain a few questions to be worked out in more detail. An existing sanitary sewer pipe runs east to west through the property in an existing 35'-wide utility easement. The main private drive for the project will be built over this easement, with as much as 13' of additional fill over it in places. At the time this report was written, Mr. Duffy had still not provided the necessary information to the engineering staff to determine: a) that the existing pipe is strong enough to withstand this additional overburden. If so, then we must also determine the width of additional easement required, if any, to allow for a safe trench to be dug to service the pipe, and if this additional width will conflict with buildings or landscaping as proposed on the Calibre Ridge site plan; or b) that it is feasible from an engineering standpoint to raise the pipe in this area, eliminating the need for a wider easement. and cost thereby This issue is not one that will make or break the project, but it could affect a few details along the sewer easement. We expect to have a resolution by the time of the Planning Commission meeting. Related to this, the applicants will need to process a request to abandon the existing utility easements in favor of the new easements that are being dedicated, not only along the main east-west easement, but for the north-south lines as well, which are delineated on the attached Preliminary Plat, Sheet C-1. This action can be formally taken at the time the final plat is approved. The plan assumes storm drainage will flow onto the Highway 36 right-of-way at the southwestern corner of the si te. This is acceptable to the engineering staff, but the applicant will need to obtain a drainage permit from MnDOT. Duffy has had discussions with MnDOT staff about this, and they have given their preliminary okay, but a formal permit has not yet been granted. It is City policy to require sidewalks in new developments, but considering the short segments of Minnesota Avenue and Rice Street that are included in the project, we believe it would be better to accept cash in lieu of a constructed sidewalk, until such time as the City might undertake an overall Minnesota Avenue or Rice Street sidewalk project.