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MINUTES OF THE <br /> ORONO PLANNING COMMISSION MEETING <br /> Monday,April 21,2014 <br /> 6:30 o'clock p.m. <br /> would start with a return at the base of the stone steps. The wall would then run along the base of the <br /> beachfront slope for approximately 40 linear feet and then return into the slope for approximately ten feet. <br /> The existing graveled area will be removed and geo block will be installed to maintain stability. Each <br /> panel will be completely covered with sod. Sedgwick stated she has drawn a sketch of what the finished <br /> project will look like and that the Planning Commission should have that available tonight to look at. <br /> Sedgwick indicated they have used geo block on other properties and that it basically is an interlocking <br /> panel that is roughly two feet by two inches. In this particular application,the panel will be placed on the <br /> existing soil. All the sharp pieces of gravel that exist now will be raked up and hauled away,the geo <br /> block will then go on top of the existing soil,the cells of the geo block will be filled with good soil, and <br /> the geo block will be covered with sod. Sedgwick indicated the geo block will provide subgrade soil <br /> stabilization and will hold the slope in place and prevent erosion down to the shoreline. <br /> Leskinen asked if the gravel pathway is where the geo block will be placed. <br /> Sedgwick indicated it is and that visually from the lake a person will see a nice path of green since the <br /> panels will be covered with sod. Sedgwick stated the geo block can hold up to 80,000 pounds when <br /> properly engineered and performs a great soil stability function. <br /> Landgraver asked how far down the path the geo block will go. <br /> Sedgwick stated it will come down to within 18 to 20 inches of the 100-year floodplain. <br /> Landgraver asked if the boulder retaining wall will remain. <br /> Sedgwick indicated it will. <br /> Landgraver asked if there are any concerns with the boulder retaining wall. <br /> Sedgwick stated that wall appears to be sufficient. Sedgwick stated boulders are not an engineered <br /> product, and any time a boulder wall is constructed above 30 inches, it should be engineered to prevent <br /> failure. <br /> Thiesse stated as it relates to the height of the retaining wall,the cross-section shows a three foot level, <br /> which means that it does not need to be engineered. Thiesse noted there are nine steps at six inches plus, <br /> which equals 54 inches, and that the wall will be very close and may be slightly over four feet. Thiesse <br /> stated the applicant should be prepared to have the wall structurally designed given the height. <br /> Sedgwick stated she is planning to keep the wall at a 3'/11"height and under four feet. <br /> Thiesse asked if a course of block will be buried. Thiesse commented hitting 3'/11" and staying under <br /> four feet can be difficult with an 8-inch or 12-inch block. <br /> Sedgwick stated the block is two feet in height and that a sub cut will be done to bury the first six inches <br /> below the soil. Sedgwick stated she can lower the height of the wall slightly if the Planning Commission <br /> feels that is necessary. <br /> Lemke asked why they chose this type of block. <br /> Page 7 of 19 <br />