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Bayfield Pit # I Adequacy Letter Response Page 7 Exhibit F cont.: Explain why a portion of the new pit extends beyond the proposed boundary of the amendment. • The proposed pits lie completely within the proposed permit boundary area. Exhibit G -Water: You state that a gravel pit well permit has been obtained to offset evaporative losses from the pond surfaces. Please ensure that the maximum number of acres of pond surface allowed under that permit will not be exceeded by the maximum amount of pond surface you aze proposing to create under this DMG permit. Currently, the well permit and S WMP are being updated to coincide with the amendment to the DMG Permit. Exhibit G -Water: Provide details of the dewatering operations under this exhibit, including how sediment will be controlled, and how the hydrologic balance of surface and ground water will be protected. Water encountered during Phase I and II will be pumped into Phase III. When mining Phase III, water will be pumped into Phase [and II. The pit base is rocky which will allow for water to sink into the aquifer. The hydrologic balance of surface and ground water will be protected during all Phases of mining. Exhibit I -Soils: The eastern half of the 10.3-acre parcel to be added is covered by a different soil than those described in past permit documents. It contains several acres of "Sedillo gravelly sandy loam". Please provide the necessary infornration for that new soil type. ^ Attached, please find a detailed description of the "Sedillo gravelly sandy loam" soil type. Exhibit L -Reclamation Costs: The exhibit states that the same amount of disturbed acres will apply to the new areas. The present bond is $44,437.00, and is based on grading a certain volume of material, plus ripping, [opsoiling and revegetating 15.34 acres. Provide adequate doctunentation of the existing amount of disturbance, types of disturbance, partially reclaimed areas, etc. This will assist the Division and the operator to determine when and if the operator may begin disturbing new areas, or if additional bond is needed for having exceeded approved amotmts of disturbance. In order to revaluate the present bond, it is important calculate the maximum potential liability to the State. We have selected a point in time where the mining disturbance could be at its maximum, based on the amendment. This point occurs during the mining of the azea between Phase I and Phase III. Here the existing dike will be removed as mining will occur between the two lakes. The reclamation of the slope areas will occur when the new dike is established between the two lakes at the later part of Phase III. The maximum disturbance will total approximately 15.8 acres. Since the overall disturbance is similaz to the original bond, we aze requesting that the bond remain the same.