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2.06.8 <br /> the structure and ditch. Remnants of the former diversion structure are still <br /> visible. The ditch is visible below the diversion structure and can be <br /> traced through the area and on to the south and is used to irrigate two <br /> fields in Section 29. There are no indications that the diverted water was <br /> to be used within the permit area or that the permit area and immediate <br /> surrounding areas have ever been cultivated. The investigation area <br /> appears to have occasionally been used for grazing of natural vegetation. <br /> The ditch and point of diversion are shown on Figure 4.1-2(a). Figure <br /> 4.1-2(a) denotes alluvial valley floors from the McClave Canyon Mine <br /> down to the Highline canal. <br /> The McClave Mining operation will not materially damage the quantity or <br /> quality of water in surface or ground water systems that supply those <br /> alluvial valley floors. <br /> GW-3 was reclaimed in 2018 as part of the final bond release for the <br /> Munger Canyon Mine. However, historic data from GW-3 is valid for the <br /> discussion below. <br /> Data gathered for SW-1 and GW-3 are presented below. The Division's <br /> 1987 Material Damage guidelines require any measured salinity values <br /> over 1000 umhos/cm be reported as `suspect' values. Since baseline <br /> values for SW-1 and GW-3 far exceed the Division's `suspect' levels, the <br /> Operator compiled data in order to demonstrate combined discharge, <br /> defined as leachate from waste pile and mine water discharge, does not <br /> add salinity to the already high values, rather, can only lower the salinity in <br /> SW-1 and GW-3 during the irrigation season. By improving the salinity of <br /> the waters in East Salt Creek and the East Salt Creek alluvium, <br /> downstream farmers will not suffer loss of production due to the addition of <br /> the combined discharge. Discharge from the sediment pond is not <br /> included because it has only discharged twice in the last five years and <br /> future discharge is uncertain based on USFWS conservation measures <br /> discussed in section 2.04-11. <br /> The following table presents the impact the combined discharge would <br /> have on the EC in East Salt Creek measured above the McClane Canyon <br /> Mine at SWA during irrigation season (April —October): <br /> TR-18 2.06-3 05/18 <br />