03-21-1988 Planning Packet - Laserfiche WebLink

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to create a 6-8* deep he desired 2:1 slopes uld decrease the weight that occurred in 1987. 1 Impact from the lake srosion potential would area exposed with no i, the long term impact ind no worse than the ry environmental impact creating an unnatural iform lakeshore bank in ubmitted by applicant, jnitude of the original It suggests excavation » a depth of 3* below sser slope down to the for surface erosion is 3und will be disturbed The visual impact from iginal proposal, as can jgest that you compare plish the same purpose, the stability may be uphill from the slope, it less obtrusive given ,n this case it is the aining wall) from the ^ /S ^11 \Zoning File #1223 March 8, 1988 Page 6 of 8 H. This option has not been previously discussed at length, because it involves a severe reduction of the applicant’s useable lakeshore yard area, and %rould have a potential negative impact because it would not blend into the adjacent properties well. The option involves a total regrading of the slope to meet the 2:1 desired slope, and would involve tamoval of a large portion of the yard. It would seem that this approach would have a severe isipact on the practical use of the applicant's property and would not be in character with the neighboring properties, even though it technically accomplishes the desired stable slope. The long- term lake quality effects would not be significantly better or worse than most of the other methods but note that the method would reduce the flat absorption area of lawn to a degree. I. This is another option that has not been proposed and suggests that a retaining wall located at the base of the slope would allow the filling behind it to approximate the original grade. Similar walls originally in place on the lakeshore bank in question. Stability of such a method is questionable given that there would be a fairly large bulk of disturbed soils placed above it. The visual impact from the lake would again depend on the height of the exposed face and of the vegetation able to be established as screening. In attempting to assign a quantitative value to the concerns of short term and long-term impact on lake water quality as well as the permanent visual impact of the various options, staff asked these questions: A) Does the method result in a significant visible change in the topography and character of the lakeshore bank relative to the neighboring properties? B) Is there a significant detrimental short term impact on lake water quality during the time the excavation is underway and during the period of time prior to reestablishment of revegetation on the site? Is this short term potential impact controllable with erosion control methods so as to minimize the short term impact? C) Does the method provide adequate stability for the bank on a long term basis, so that future occurrences of major erosion will be minimized or eliminated? L ..