Laserfiche WebLink
-10- <br />C <br />analysis of stability of the fill, we have used a permeability <br />of 1,000 feet per year and 100 feet per year with both analyses <br />made, assuming that the horizontal and vertical permeability are <br />equal. <br />DISPOSAL SITE CONDITIONS <br />Area I <br />Spoil Area I is located east of an existing haul road and <br />• <br />south of Pinnacle Peak in Sections 7 and 8, T. 4N, R. 86W. There <br />is a long ridge which extends from the high area to the south down <br />to Pinnacle Peak which forms the north boundary of Disposal Area I. <br />The west boundary of this area is an existing haul road. The ground <br />surface within the proposed spoil disposal area is essentially a <br />bowl, confined on three sides by ridges. Pinnacle Peak and the <br />long ridge along the north boundary contain the bowl in a general <br />north direction. The south side of the area is a long, gently slop- <br />ing ridge which rises into the area of existing and future mining. <br />`~ 7 <br />At the time of our investigation, surface drainage in this area was <br />not goo Because of the ridge to the north, surface drainage which <br />r <br />comes from the large area to the south is essentially blocked and <br />must flow around to the west flank of Pinnacle Peak. The grades in <br />the valley are very flat and the surface is underlain at shallow <br />depths by relatively impermeable bedrock. Additionally, construction <br />of the haul road along the west boundary of this area has probably <br />decreased the rate of drainage out of the proposed disposal area. <br />• <br />