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' GROUWD NATER QUALITY Appendix IV contains the hydrologic information taken for ground water. Moni- ~ to ring requirements on the loadout wells was eliminated this year and monitoring on the mine site and refuse wells was reduced. A stipulation on reduction of mine site well monitoring was that monitoring would return to a monthly ' schedule if the mines were sealed. Sealing of the #1 and #3 Mines was started in August. Monthly sampling has been resumed on Hole #3 and 4. The #1 Hole at the mine site continued to show major fluctation in the quality. As discussed in an answer to questions on the 1985 Annual Hydrologic Report, there is a wide range of geologic zones that may influence this well. Due to the wide range of influence, the information from the well may not be very useful. The well was destroyed in the spring of 1986 by surface activities. The well was not reestablished. ' The quality on wells 3 and 4 at the mine site and wells D-lA and D-2A was similar to previous monitoring. Water levels in these wells continued to be somewhat erratic. MINE INFLOWS ' Appendix V contains the 1986 Inflows Maps for the #1 and #3 Mines and the mine discharge data. The inflow study was taken June 26, 1986. Pumping had been discontinued by that time. The water levels at that time are shown. Part ' of the original inflow sites were inaccessible for monitoring this year due to the mine filling and disruptions in ventilation from equipment removal. ' The filling of the #1 Mine started in March when part of the mine water was allowed to flow into the slopes. The remaining pumps were removed on June 3, 1986. The data in Appendix VI shows the results of B-seam mine inflows into the #1 Mine in May. The B-seam inflows were diverted to filling the slopes on May 14 because discharge was out of compliance. During the fall of 1986, an attempt was made to stop the high spring 6-seam inflows. A couple of old portals or subsidence features up dip from the active portal were covered to prevent surface runoff from flowing into the old mine. The seals on the #1 Mine will not be ' completed until next spring when a reduction in B-seam inflows can be verified. April 7, 1986 was the last recorded meter reading for the #3 Mine but pumping apparently stopped in February according to flow calculations. The flow from sources above the main intake portal was piped to the surface to satisfy all or part of the augmentation needs to North Thompson Creek while the #1 Mine is flooding. The pipe line was completed September 4. The 6" water meter ' installed at that time would not register the low flow so a 3" water meter was installed on September 18. A second drain was installed in the belt portal seal to allow discharge from the entire mine if the water level in the mine reaches that point. The consumptive use of the operation was not recorded this year. Minor amounts of mine water were used in the office and bathhouse until pumping was discon- ' tinned in June. The following table shows the mine discharge to North Thompson Creek: