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seasonal variations; lower values during the warm months and higher <br />values during the cold months. The fluctuations could be due to <br />the rising water level of the reservoir after the water level was <br />drained to base level during the irrigation seasons. <br />Field notes taken in June indicate that the Harvey Gap Outlet-Above <br />Mine water was clear and the Harvey Gap Outlet-Below Mine water was <br />muddy. From time to time, as the bank of the Harvey Gap Outlet is <br />eroded away, portions of the bank slide into the stream. The <br />absorption of chemicals from the bank soil could lower the hydrogen <br />ion concentration, raising the pH laboratory measurement. <br />The 1992 mine water discharge results are quite similar to those <br />for 1987-1991. This would be expected due to the lack of <br />advancement of the entries. <br />Imvacts on Surface and Ground Water <br />No discharge has occurred from sediment pond SP-1. <br />The water monitoring data are listed on the attached tables found <br />in the Data and Statistical Information section beginning on page <br />6. A comparison of 1992 data with 1984-1991 data indicates no <br />impacts on ground or surface water have occurred due to mining. <br />4 <br />