Laserfiche WebLink
r 1 <br />L J <br />u <br />• <br />3.2 PROPOSED CONSTRUCTION <br />3.2.1 Waste Rock Pile <br />It is proposed to construct a waste rock pile on the <br />relatively level colluvial soils below the crushing and <br />screening level fill. The pile will consist exclusively of <br />breaker reject material. The regulatory requirements to be <br />satisfied in the design of this pile will depend on the <br />classification of the waste rock material. <br />The waste pile will be restricted to the higher eleva- <br />tions between minor drainages in order to avoid blocking the <br />drainages. Proposed alternate locations of the waste pile <br />are indicated on Plate 2. Our preliminary estimates indi- <br />cate that, assuming the pile is constructed with side slopes <br />of 1.0(v):2.0(h) and does not exceed 50 feet in height above <br />the original ground surface, the eastern location would pro- <br />vide a total capacity in excess of 50,000 yd3, while the ca- <br />pacity of a pile at the western site would exceed 150,000 yd3 <br />The estimated volume of waste rock which will be pro- <br />duced during the 40 year life of the mine is on the order of <br />20,000 to 40,000 yd3, depending on the production rate and <br />waste factor, though this may be subject to change. It would <br />therefore appear that either site has sufficient capacity for <br />the projected output of waste during the mine life. <br />Our inspection of the existing waste rock pile and <br />discussions caith CidI personnel indicate that the waste rock <br />pile will contain a high percentage of lump coal, something <br />on the order of 50%. The origin of the breaker reject ma- <br />terial and our slake durability testing indicate that this <br />- 17 - <br />GE6HYDY0 CONSULfING.IHO. <br />