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DIVISION OF MINERALS & GEOLOGY BOARD PERMIT AMENDMENT APPLICATION <br />REGULAR OPERATION (112) <br />PERMIT # M-1992-066 <br />HOGUE RIVER PIT <br />EXHIBIT D Mining Plan <br />A. General History <br />The original gravel pit was permitted and mined, by Yampa Valley Industries in <br />1973. Mining was then abandoned by Yampa Valley Industries. In 1978, a Routt <br />County Special Use Permit was granted to Charles Hogue which was to expire in <br />1993, the date the original permit granted to Yampa Valley Industries would have <br />expired. <br />2. Current mining operations commenced in the spring of 1993. Approximately 51 <br />acres of land were permitted under this permit. The total mined area was to be 38 <br />acres, divided into four phases. At this time, Duckels is filing for an amendment <br />to the current permit, which will allow us to mine the remaining 13 acres, of the <br />51 acres, this becoming Phase V. <br />At the date of this permit amendment application Phase I has been mined except <br />the areas located beneath the existing topsoil berms on the north side of the pit, <br />the areas beneath the internal access road, stockpiles and the scales, Phase II has <br />been mined completely, in Phase IV approximately 5 acres have been mined and <br />none of Phase III. The original plan was to mine the phases in order; however, as <br />mining progressed, we found that the dewatering process increased as we mined <br />Phase II on the south side. Phase III shares this same southern boundary. <br />Therefore, a portion of Phase IV has been mined before Phase III. This allowed <br />us to run a dewatering ditch along the northern edge of the pit floor. <br />It is anticipated that the remaining portion of Phase IV and Phase III will be <br />mined simultaneously and depleted in approximately two to three years at the <br />current rate of mining. It is estimated that Phase V should take approximately six <br />to seven years. These time frames are approximated with regards to the rate of <br />use, in the current economy. <br />B. General Site Conditions <br />Initial exploratory tests indicated that the topsoil and overburden on the site were <br />from one to three feet thick. As mining has progressed, this has proven to be the <br />case. The topsoil is removed, then placed or stockpiled for reclamation of the <br />mined area. Topsoil stockpiles have been used to create berms on the northern <br />side of the mining area, in order to minimize the visual impact along U.S. <br />Highway 40. These areas have been revegetated, per the recommendations of <br />