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r <br />Zoning File #1647 <br />June 11/ 1991 <br />Page 3 <br />Staff recommended Option B to the applicant with the intent <br />of maintaining the required 26' setback to the creek and 10' <br />setback to the house. While this reduces the street setbacks, <br />the garage still remains behind the front line of the house, and <br />is screened from Bayside Road by existing vegetation. Hardcover <br />with this proposal is slightly higher than Option A due to the <br />probable need for slightly additional driveway width. <br />Flood Plain Issues <br />As can be seen from the attached Flood Plain Map, the house <br />and proposed garage are in Flood Zone B, a sheet flow area <br />between the 100 year and 500 year flood boundaries, by definition <br />the "flood fringe". <br />Sheet flow would occur if the creek overflowed its banks onto the <br />adjacent land, which is generally sloped toward the lake. Such a <br />sheet flow would be of relatively short duration and probably <br />only a few inches deep. Our Code allows structures in a sheet <br />flow area under specific standards. Staff discussions with the <br />DNR resulted in confirmation that they would not specifically <br />review this type of application, as long as the garage floor is <br />1' above the 934' regulatory flood protection elevation at that <br />point along the creek. Therefore, one condition of garage <br />approval would be to have the garage slab elevation no lower than <br />elevation 935.0. Approximately 1' of fill would be required to <br />accomplish this based on topographic information in our files. <br />Staff has conferred with City Engineer Glenn Cook on this, and <br />would recommend approval of a "flood fringe" conditional use <br />permit under the above-noted conditions and per any requirements <br />the Minnehaha Creek Watershed District might have. <br />Sewer Issues <br />The property is within the Stubbs Bay Sewer project area, <br />and a very recent inspection of the septic system indicates while <br />no surfacing is occurring there is a clay tile outlet at the <br />creek, which in 1987 was noted by the previous owner to be a <br />direct laundry discharge. That owner was advised that such a <br />discharge was illegal, and he agreed to stop that discharge. <br />However, the pipe is still in place and Septic Inspector Steve <br />Weckman is currently investigating whether it has any current <br />function (i.e. footing drains for ground water removal), whether <br />it may be connected to the drainfield, and whether it can be <br />removed. <br />PC <br />ffI ^