Laserfiche WebLink
r <br /> animals or wildlife using the surface. However, relatively minor creep movements <br /> common to these steeply sloping areas would result in quickly re-establishing the <br /> original state of stress in the soil and rock and the effects on surface and <br /> subsurface drainage would diminish rather rapidly as surface tension cracks began <br /> to heal and fill wit4i sediment. Therefore, although we expect minor, temporary <br /> impacts, we would expect no significant long-term impacts from subsidence. Much <br /> more specific information will be provided in the body of this report along with <br /> a description of the assumptions and limitations of this study. <br /> 2.0 PR3717C.R DESCRIPFICN <br /> 2.1 The Proposed Mining <br /> The study area consists of the existing Bear Mine #3. The mine is located <br /> at Somerset, Colorado on the North Fork of the Gunnison River. It is an <br /> underground "drift'$ Nine with portals located in the "C" seam outcrop <br /> approximately 150 feet above the river on a north facing slope. Mining is <br /> accomplished using the roan and pillar method and continuous miners. Mining to <br /> date has been entirely within the "C" seam. Bear Mine #3 is located at the site <br /> of the old Clark Mine which included workings in both the "C" seam and the <br /> underlying "B" seam. Bear Coal Company would now propose to begin mining within <br /> the "B" seam located approximately 35 to 40 feet below the "C" seam at this <br /> location. Both the "B" and "C" seams at this site dip generally to the north <br /> some 3 to 5 degrees. The actual dip direction, however, may vary locally within <br /> the mine from northwest to north northeast. The overburden thickness can vary <br /> from as little as 200 feet near the outcrop barrier pillars to as much as some <br /> 1,565 feet above the pain entries in the southeast portion of the mine. <br /> i <br />