10-17-1988 Planning Packet - Laserfiche WebLink

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f.The lot lines e acre in area for a variance tc lot ouse on Lot 9 be from newly proposed irea designated as and 10is credited r we discussed the ces for Lots 1,2, 3n 6 (A)(1).The ic testing for Lot align the northern Itlot entering West to the roadway in understanding from ecommend that Lots the Comprehensive 1 MWCC.Cook is to ed with municipal pay for all costs unicipal water is ady been assessed nt project.Lots 9 d not be included there is adequate he new units.The ation on Wildhurst luded in your plan igh copies of the include in your Idhurst Trail jusr :1*to negate the i new development, d by heavyrun-off e majority of the minarlly approved ^1-1- i IS Zoning File #1348 October 12, 1988 Page 4 of 6 Storm Sewer - Please review Exhibit H, sections of the storm sewer plan, properties to the north of the loop of Garden Lane are served by a storm sewer that drains to the wetlands at the northeast corner of the property. The wetlands in the southwest corner will no longer drain along the informal ditching draining west to the ravine area, but will now be re-directed along the shared lot line of Lots 6 and 7 to the roadway and then carried to the ravine north to the Soskin property. In relation co some of the discussions that we had regarding Lots 1 and 2 of the Soskin subdivision, note that there is no longer a drainageway from the west through those properties. The ravine in this section will no longer receive drainage from the west. The road will carry drainage up to the major drainage ditch within the Soskin property. The drainage from the northeast (south of the north loop of Garden Lane, note division of drainage) will drain to the drainage ditch in the Hennesey property Lot 63.Note the drainage ditch that is to be constructed within Lot 63 of Tonkaview Gardens is currently not under the ownership of the subdividers and will require a separate agreement with the owner. In the sketch plan review, we discussed the need to re-direct drainage to the northeast through a designated wetlands (review Exhibit F). Currently, the ravine run-off in a heavy rain flows over Wildhurst Trail into the drainage ditch that floods the lift station referred to above. The developer will be asked to install a storm sewer along the west side of Wildhurst Trail to the intersection of the Cronstrom's driveway then to drain into the wetlands within the Cronstrom property and to eventually drain into Forest. Lake. Hopefully, the wetlands map when copied will still be able to reflect the arrows that show the proposed drainage path (Exhibit F). This property is not under the ownership of the subdivider and will require a separate agreement with the Cronstroms. The applicant must submit the necessary hydraulic information based on 100 year storm data. This becomes very important as we channelize and increase drainage through the ravine. In cases of severe storms it may be necessary to slow up the run-off with earthen dikes. Once again, if earthen dikes are required, the areas of the ravine that would be required to have the earthen dikes would not be under the control of this property owner and would once again require an agreement and understanding with the outside property owners. The applicant has been advised to file an application with the Minnehaha Creek Watershed District to review all grading and storm sewer improvements. Untix we have the necessary information on increased run-off at fully developed stage, staff can make no final recommendation on the storm sewer plan. Zoning Octobe] Page 5 T1 Lane tl public by the the De^ I-l, th the out impact a futu] (Exhibd properl munieij via pla and tre City En north I closer soils I locatir sites, sewer t change : has alr< within review applic review meeting it rel utiliti plat re vacate The 10* be tota Park Dedi John in park 1 lands in to the ea