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w 12-Ed-1997 9:08At4 FROh1 ENG. WEST ELK ~1INE 970 9295N5~ p 28 <br />NOU 6'97 1520 FR BF1f?R ENGINEERING 612 832 2651 TG `JGy55y5--eb~evrtts ~.e~~~ i0 <br />To: Nom Eery <br />Yroms ?bsip B. Soleeag <br />9nb1•et: W.se Esc btin:-I~a4lide <br />D~e~ November G 19af <br />Faoieet: 06lB014RW W001 Pun a <br />4. Discueaioa regarding the parking lot buttress designed by Dames and <br />Moore. <br />• Barr will be reviewing the appropriateness of this buttress to stabilize <br />the parking lot and the effect of the buttress on the overaIl landslide. <br />~, Discussion <br />1. The Endings from the test weII dewateriag program are generally consistent <br />with the findings described in the Interim Report (Barr, Sept. 1997) in the <br />area of the substation and cross section A-A. The findings to date have not <br />been. extrapolated to the stabilization of the larger landslide at this time. <br />The work plan proposed herein along with the information currently being <br />gathered with the proposed inclinometers will provide the basis for <br />presenting a comprehensive work plan for the entire landslide area. <br />2. The current work of lining the ponds is consistent with the Interim, Report <br />.(Barr, September, 199?). <br />3. The concept plan of stabilization proposed by HLA is consistent with the <br />., Interim Report (Barr, September, 1997) with a modification tha! the atone <br />columns and RCC/soldier pile are located upelope near the head of the <br />landslide rather than at the toe of the ]aadalide_ This is reasonable based <br />upon the recent findings of no excess pore pressures at the toe of the <br />landslide. However, the toe of the landslide may still require localized <br />stabilization and the concepts of sWne rnlumns and/or RCGsoldier pile to <br />strengthen the toe will be applicable. The use of lime stabilization needs to <br />0626014\S{aBl•YOEr <br />