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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 moved away far enough to <br /> make it practical for seedbed prep and seeding. Also, time of year and <br /> weather conditions will play 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 - <br /> processing 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 export material to other sites <br /> for purposes of backfill. If this activity is expected in the future the Board will <br /> be properly notified. <br /> (10) All mined material will be handled in such a manner so as to prevent any <br /> unauthorized pollutants to the surface drainage system. The sand and gravel <br /> stockpiles will be located and arranged to avoid any uncontrolled runoff of <br /> 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 />