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<br />appropriate representative soil paraweters of the in situ <br />soils), the c:alculations show that the slopes will have <br />adequate safety factors that exceed regulatory requirements. <br />SCC and their consultants strongly believe it would be <br />technically incorrect to arbitraril}~ assign ground water <br />elevations to any of the cut and fill slope stability analyses <br />included in the report. Such approach is biased since it <br />misrepresents field conditions and hats no practical value. <br />NWWC agreed in the report that seepage probably would not be <br />encountered. Effects of seepage and groundwater in this <br />context are t~ao entirely different is:;ues. <br />SCC is aware there is a remote possik~ility that seepage may <br />induce local .Limited sloughing in cut slopes. However, such <br />occurrences are extremely difficult to predict. The <br />consequences of such limited sloughing are generally <br />insignificant if local slope repairs and maintenance are <br />performed. :Cn the most unlikely event such unpredictable <br />sloughing would occur, SCC is prepared to repair the affected <br />slope area by installing toe drain,: or other appropriate <br />remedial measures in a timely manner. <br />In the unlikely event that ground water is encountered, the <br />following measures will be taken: <br />Road Embankment Stabilization: Embzankments constructed on <br />slopes steeper than 5H:1V will be benched in to the sidehill. <br />The minimum bench width will be ten feet horizontally. <br />Benches will 'be placed every ten feet :in elevation difference. <br />If ground water is present, the benches will be sloped to <br />drain to thfa center of the embankment bench. A gravel <br />(French) drain will be conducted at th.e bank of each bench and <br />sloped to a central "French" downdrain. The gravel bench <br />drains will be wrapped with an appropriate geotextile filter <br />fabric to prevent clogging of the drain. <br />)toad Cut Stabilization: In road cuts where ground water is <br />encountered, the slope will be reduced, if possible. The <br />ground water will be intercepted with a lined channel to carry <br />the runoff away from the cut face. A gravel, geotextile-lined <br />channel will be constructed diagonally along the face and exit <br />into the riprapped section of the road ditch. An appropriate <br />positive road ditch gradient will be maintained to transport <br />the runoff from the cut area and discharge the water to a <br />predetermined area. <br />Tab 15 - Hydrologic Moaftorin4 Plaa <br />C~~ ~ 49. Table 15-7 in Tab 15 lists monitoring procedures for <br />`~l~ monitoring wells used to collect ground water data during the <br />baseline period. Table 15-8 presents proposed frequencies for <br />collecting water levels and water quality from monitoring <br />12 <br />