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-2- <br />• <br />Eckman Park Area from Foidel Creek. A sedimentation dam is planned <br />near the confluence of two drainages on the south flank of Pinnacle <br />Peak and at the point where surface drainage from the Eckman Park Area <br />will discharge into a lower drainage basin. The proposed Haul Road 'D' <br />will be constructed after the sedimentation dam and will be located im- <br />mediately downstream of the sedimentation structure. Haul Road 'E' will <br />be located along the east side of the proposed extension of the mine <br />and will serve both the existing mine and the proposed future extension. <br />Haul Road 'C' is presently used in the existing mine and will be modi-. <br />fied as necessary to meet compliance with the current Federal and State <br />regulations. <br />The final alignment and grades for the proposed haul roads were not <br />• set at the time of this investigation. We anticipate cuts as high as 40 <br />feet and fills ranging up to 60 feet in height. Most of the Haul Road <br />'D' will be constructed along the ridge line and will involve minimum <br />cut and fill sections. Significant fills will be required between Sta. <br />10 and Sta. 20 on Haul Road 'D' in order to achieve desired grades and, <br />in addition, considerable fill will be required in the vicinity of St a. 80 <br />to Sta. 100 in order to maintain relatively flat grade. Most of Haul <br />Road 'E' will require cut, with some fairly high fill required between <br />Sta. 20 and Sta. 30, and in the vicinity of Sta. 50 and Sta. 60. <br />FIELD INVESTIGATION <br />This report was prepared in conjunction with investigations conducted <br />• for proposed spoil disposal areas and an investigation of subsurface <br />