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MUNGER CANYON MINE <br />To date there has been no water encountered by this mine; therefore, there has been no effect on the <br />hydrologic regime of the area. A current mine workings roap is included as Figure 2. Table 1 <br />documents that no water was used at the mine this yeaz. <br />PRECIPITATION <br />Based upon Bureau of Land Management records from a rain gage in Ashford Canyon, the 1994 - <br />1995 water year experienced above average amounts of precipitation Precipitation has been <br />monitored at the BLM rain gage for 19 years. Note that the months of October and November 1995 <br />experienced record low precipitation for the period of record. <br />The records for the Ashford Canyon rain gage do not give a precise record of the precipitation at the <br />mines. Localized thunderstorms and may only effect one of the [Harty canyons in the azea. <br />EFFECT OF THE MINES ON THE EAST SALT CREEK REGIME <br />Surface Water <br />Due to the limited disturbance of the mirtes there is little chance that any significant effect on the <br />quantity or quality of the surface waters near either mine sites has occurred. As the Division notes in <br />its approval package for the Munger Canyon Mine, the total azea that will be disturbed by both mine <br />sites amounts to 0.12 percent of the azea of the East Salt Creek drainage basin above the mines. <br />Surface water samples during the 1995 water yeaz were collected each quarter from East Salt Creek <br />(SW-1 and SW-8) as required by the monitoring program The sample sites on McClave Creek were <br />dry the etttire yeaz. Munger Creek was flowing during fourth quarter of 1994 and the third quarter of <br />1995. -The flow was from the North split of Munger Creek and does not include flow from the area of <br />the mine site. Results of the quarterly sampling for each of the monitoring sites are shown in Table 4. <br />A comparison of the water quality parameters in East Salt Creek shows no significant water quality <br />changes between samples taken above and be]ow the mine. <br />Water samples collected show that the quality of the water is generally the same as for previous years. <br />Storm events large enough to cause runoff in all creeks cause high levels of total suspended solids and <br />other flow dependent parameters. These events can also cause increased concentrations of soluble <br />parameters that have been flushed from the normally dry creek beds above the mines. The Division's <br />review of the 1992 annual hydrologic report revealed that Manganese concentrations were high both <br />above and below the operations. The concentrations of Manganese during the 1995 water yeaz are <br />shown below. <br />LOCATION East Salt Creek McClane Creek Munger <br />Above Below Above Below <br />SW-1 SW-8 SW-5 SW-2 SW-3 <br />4THQ'94 0.316 0.2.87 DRY DRY 0.758 <br />1 ST Q '95 0.213 0.237 DRY DRY DRY <br />2ND Q '95 0.956 0.509 DRY DRY DRY <br />3RD Q '95 1.020 1.100 DRY DRY 1.020 <br />These results indicate that during events large enough to cause ephemeral drainages to flow, high <br />concentrations of Manganese were measured. Conversely, during normal low flow, manganese was <br />not being flushed into the system of drainages and remained in relatively low concentrations. <br />AHR - 95 Page - 3 1 - 26 - 96 <br />