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<br /> <br />used in the development of this map. Wells GF5 and GF7 are completed <br />in the backfill in the area where the H and I coal seams were mined. <br />Flow in the HI aquifer has been changed mainly at the A, D and E pits. <br />The overall flow regime in this aquifer is close to that observed in <br />1986 (see Hydro-Engineering, 1987). <br />The Third White Sandstone aquifer piezometric levels are <br />presented on Map No. 2-3. Wells GS2, GC2, GE3 and P8 were used in <br />the construction of this water-level elevation map. Flow direction in <br />the Third White Sandstone is mainly toward the north, as expected. <br />Natural variations in recharge to this aquifer are thought to have <br />caused more changes in the piezometric map of the Third White <br />Sandstone than mining. <br />• <br />2-11 <br />