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(4) All backfilling and grading will be completed as soon as feasible after the <br />mining process. The operator will establish reasonable timetables consistent <br />with good mining and reclamation procedures. Grading of backslopes will be as <br />mining is occurring, and the pit floor will be contoured for seeding as mining <br />proceeds. <br />Topsoiling will be accomplished after mining has been completed in each <br />phase,with time of year and weather conditions playing a role in this timing. <br />(5) No refuse will be generated by this mining operation for cleaning and <br />preparation of substances mined. No acid-forming or toxic -producing materials <br />will be mined or used for processing at this sand and gravel mining - processing <br />plant. Therefore, no plans have been developed for their handling. <br />(6) There will not be any drill or auger holes unfilled after mining. All <br />exploration will most likely be done with small bore coring by a trained crew or <br />by backhoe in selected areas, and after discovery, all holes shall be backfilled <br />as soon as possible. No adits or shafts will be employed in this open pit. <br />(7) Maximum slopes and slope combinations shall be compatible with the <br />configuration of the surrounding conditions and selected land use. Side slopes <br />will be graded to a maximum 3H : 1V. <br />(8) Farm machinery will be used at the time of revegetation and will not be a <br />factor long range, since this land will be rangeland for grazing cattle. <br />(9) The Operator/Applicant does not propose to import material to the site for <br />purposes of backfill. If this activity is expected in the future the Board will be <br />properly notified. <br />(10) All mined material will be handled in such a manner so as to prevent any <br />unauthorized release of pollutants to the surface drainage system. The sand <br />and gravel stockpiles will be located and arranged to avoid any uncontrolled <br />runoff of stormwater from this site. <br />(11) No groundwater pollutants will be released at this site. <br />3.1.6 Water - General Requirements <br />(1) The hydrology and water quality of this site will not be adversely affected by <br />this operation. No groundwater will be encountered during mining, and the only <br />surface changes shall be controlled and monitored to minimize the affects on <br />the historical stormwater runoff patterns. <br />(a) The operator/applicant will comply with Colorado water quality laws <br />and regulations governing injury to existing water rights. <br />