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<br />INTRODUCTION <br />With [he opening of the Orchard Valley West Mine in early 1987, CWI began devel- <br />opment within the East Roatcap drainage, which had not yet been reached by de- <br />velopment within the Orchard Valley Mine. This stream, as well as Steven's <br />Gulch, was undermined through a buffer zone area (established in Federal coal <br />lease No. C-37210) of 600 feet or less of overburden, restricted to main entry <br />development. Previously, no streams had been undermined. As yet, no impacts <br />due to mining have been evidenced. <br />Mining of the Orchard Valley West Mine was achieved with the intensive efforts <br />of four mining crews working twenty-four hours a day in three shifts, seven days <br />a week. These crews utilized a single unit of mining equipment to maximize pro- <br />duction in order to fulfill the anticipated orders far 1987, at the lowest pos- <br />sible cost. A court decision in August, however, allowed CWI's customer to <br />order less coal than was anticipated. This resulted in production for the year <br />[o exceed sales and the Orchard Valley West Mine was idled in early December and <br />into 198$. <br />Hydrology and subsidence data were gathered, recocded, and are presented in this <br />report. Colorado Westmoreland Inc.'s 1987 Annual Hydrology and Subsidence Re- <br />port is submitted in compliance with stipulation Nos. 4 and 5 attached to Permit <br />C-038-83 as revised. The topics to be discussed are as follows: 1987 Produc- <br />tion and Geologic Conditions; 1987 Subsidence Impacts; 1987 Hydrology Impacts; <br />1988 Mining Projections; 1988 Projected Subsidence Impacts; and 1988 Projected <br />Hydrology Impacts. <br /> <br />