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• W~,,.' ~,~' • <br />scale. The Nine No. 3 sites is considered a local scale and the <br />inputs to the system are very limited. The contributing factors are <br />stream inflow, .runoff from the area tributary to the stream system <br />irrigation return floe and groundwater contribution, the depleting <br />factors are stream diversion, evapotranspiration and groundwater <br />depletion. Tihen all factors are accounted for, the outflow from the <br />system can be calculated. Amesa-balance calculation utilizing the <br />accounting method for the Mine No. 3 sites is presented under <br />Section Z.05.6(3), Protection of Hydrologic Balance.l~ <br />The baseline data, analyses, and discussion presented in the <br />application show that the hydrologic monitoring plan may be <br />abbreviated and still account for all measurable effects of mining <br />on the hydrologic balance. Since no dewatering or depletion of <br />water is proposed, streamflow monitoring on Middle Creek downstream <br />from Mine No. 3 is not necessary to detect the effects of mining. <br />The frequency of monitoring is set forth in Exhibit 15, Table <br />B. Monitoring done by CYCC is "synchronized" in that all parameters <br />at applicable sites are monitored on the same day. Since atreamflow <br />is continuously monitored at the DSGS Gaging Stations, it is not <br />necceaeary to "synchronize" the streamflow monitoring with the <br />schedule of water quality sampling. <br />5. NDPES permit requirements stipulate that flow from discharge points <br />be monitored for average and maximum flow rates and water quality <br />parameters. The Division requests that all discharge from the detention <br />-11- <br />