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<br />Cripple Creek & Victor Gold Mining Company Exhibit G Cresson Project Amendment 13 3 <br />2 SITE HYDROLOGY <br />The following discussion of surface water and groundwater hydrology is an update and summary of the more detailed information provided in the 2015 Hydrologic Evaluation, which was submitted and approved by DRMS with Amendment 11 documentation. <br />2.1 Surface Water <br />Regionally, surface water flows from the permit area are tributary to the Upper Arkansas River. On the south side, surface water generally flows into Theresa Gulch and Bateman Creek, which are tributaries to Wilson Creek, which then flows into Fourmile Creek and ultimately to the Arkansas River. On the west side, surface water generally flows into Poverty Gulch, Squaw Gulch, and Arequa Gulch, all tributaries to Cripple Creek, which flows into Fourmile Creek, which then flows into the Arkansas River. On the north side, surface water generally flows into Grassy Valley, a tributary to Beaver Creek. Figure G-1 shows the surface water system including a two-mile radius around the Cresson Project permit boundary. <br />Locally, active surface water channels essentially do not exist throughout most of the diatreme-based Cripple Creek Mining District (District). Due to current mining activities, the presence of below grade surface mine areas, the relatively high rock permeability of the diatreme, and the historic lowering of the groundwater table by the area drainage tunnels, precipitation infiltrates and surface water flows are only rarely observed. Only during significant snowmelt or after heavy rainstorms is flow observed in the typically dry washes. The stream flow that does occur is seldom continuous along the channel with surface flow appearing and disappearing in a downstream direction, while some sections of the stream channel remain dry even during precipitation events. <br />Surface water quality in the District has remained relatively stable over the monitoring period of record for most of the monitoring locations although certain historic mine features and activities in many of the drainages appear to have some influence on surface water quality. <br />Each of the drainages is discussed separately below. <br />2.1.1 Wilson Creek and Tributaries <br />The activities associated with Amendment 13 do not affect the Wilson Creek drainage. The Enhanced Management Ponds (“EMPs”) will remain in place to control surface water flows from the existing facilities in the Wilson Creek drainage.