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Dan Mathews -3- May 21, 2007 <br />The Division has reviewed the operator's responses and the amended map figures, as <br />well as internal geotechnical review memoranda from November 1996 and January 1997, which <br />document the Division's review and acceptance of the backfilling plan and associated stability <br />demonstrations associated with the °blue line" map Figures depicting the upper road and portal <br />bench reclamation (Figures 3.1-5, 3.1-6, 3. i-7, 3.1-8, and 3.1-9). <br />We have the remaining questions and concerns. <br />First, the 5' contour lines appear to be missing or illegible on our copies of Figures 3.1-6 <br />(3/22/07) and 3.1-7 016/07), in certain key locations along the road: Fig. 3.1-6 from <br />approximately 100 feet west of Section 42+00 to the east boundary of the figure, between the <br />5725' and 5750' contour lines (missing); Figure 3.1-7 from approximately 100 feet southeast of <br />Section 47+00 to approximately 50 feet west of the same section, between the 5750' and 5775' <br />contour lines (missing); and Figure 3.1-7, significant areas generally to the west of Section 47+00 <br />(illegible). <br />Second, the map lines delineating the upper and lower boundaries of "existing <br />disturbance limit' and reclamation limit" are missing or illegible along most of the road <br />reclamation segment on Figure 3.1-7, from Section 47+00 to the west boundary of the figure. <br />Third, the upper reclamation limit indicated on Figure 3.1-7, in the vicinity of Section <br />47+00, appears to extend somewhat higher in elevation than the existing disturbance limit, which <br />would indicate that some grading would be performed to °round off" the slope transition at the <br />crest of the cut, along this narrow, steep segment of the road. This is not specifically described in <br />Section 3.3.2 narrative, nor indicated on the stability cross section, and clarification is warranted. <br />Please address these concerns and provide amended map Figures and narrative <br />as necessary to clarify reclamation plan details for the upper-most access road segment. <br />CAM: New Figure 3.1-6A is provided to show the contours at Section 42+00. <br />New Figure 3.1-7A is provided to show contours at Section 47+00 and areas to <br />the west of Section 47+00. The upper and lower boundaries of the disturbance <br />limit are shown on Figure 3.1-7A. The upper reclamation limit shown on Figure <br />3.1-7, in the vicinity of Section 47+00 was removed on new Figure 3.1-7A. <br />Sincerely <br />~~ <br />J. E. Stover, P.E. <br />Consulting Engineer <br />Enclosures <br />Volume I: Page 3-6 <br />Volume II: Table of Contents, Figures: 2.2-7A, 2.2-7C, 3.1-6, 3.1-6A, 3.1-7 <br />3.1-7A <br />Volume III: Pages: M(vii)-53 & 55 <br />