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6.4.7 Exhibit G <br />Water Information <br />Mining is expected to have no impact on the prevailing hydrologic balance. <br />Groundwater will not be exposed; therefore, a Substitute Water Supply Plan will not <br />be necessary. <br />The John Martin Reservoir is the only natural water resource in the area, <br />located southwest of the proposed site. The State Engineer's Office AQUAMAP <br />database was accessed for area water structures but no structures or permits were <br />identified in the vicinity of the proposed gravel pit. The proposed operation will <br />develop a pit that will not discharge stormwater or process water drainage. In the <br />event precipitation pooling in the pit does not percolate within 72 hours, a discharge <br />permit will be obtained from CDPHE Water Quality Control Division. <br />Runoff occurs as overland flow to natural drainage ravines in the vicinity. <br />Stormwater best management practices such as waddles, straw bales, and perimeter <br />berms will be placed to effectively manage stormwater. Historic flow will be <br />maintained during mining. <br />Consumptive use of water may occur as dust suppression on the haul road <br />and working face. The operator will purchase the necessary volume of water from <br />an appropriate supplier. The amount required for dust suppression is undetermined <br />at this time. <br />The permittee will complete a stormwater management plan and file a <br />stormwater discharge application with Colorado Department of Public Health and <br />Environment, Water Quality Division. Diversionary berms and impoundments will be <br />constructed as recommended by the Water Quality Division. <br />7 <br />