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• permeability core tests indicate. Because transmisivities of the <br />strata in the Coalmont Formation are so low, groundwater movement <br />may be significantly controlled by fracture systems or faulting. <br />However, despite the relative higher permeabilities demonstrated <br />by the aquifer tests versus the core analysis for Pit 1, in all <br />cases the measured permeabilities are extremely low resulting in <br />insignificant flow rates. <br />In addition to the five groundwater monitoring wells pre- <br />viously installed in the Pit 1 vicinity, nine new piezometers were <br />installed within the Pit 2 area. A well was also placed in the <br />compacted spoil area north of the original pit in Section 2. This <br />well will monitor groundwater beneath the reclaimed area. Exhibit <br />C-2 is a geologic map of the permit area showing the location of all <br />groundwater monitoring wells currently in existence in the vicinity <br />of the Canadian Strip Mine. <br />• Lithology logs of the the ten new piezometers are found at <br />the end of this Appendix. Table 16 is a summary of the monitoring <br />well data describing the completion zones, etc. for these new wells. <br />As can be seen from the table, Wells 4A, SA and 6A are completed in ~ <br />the underburden below the coal and are sealed off from it. Wells <br />4B, SB and 6B are completed in the coal, while wells 4C, SC and 6C <br />are completed in the overburden immediately overlying the coal. <br />The three sets of monitoring wells are located just outside the <br />~ highwall limits down dip of the proposed mine regions, and each <br />group is separated along strike by a distance of approximately 1600 <br />feet. Figure 3 shows schematic diagrams of the three types of <br />piezometer completions. <br />Table 17 is a summary of the static water <br />new monitoring wells. The nine new wells that <br />in 1980 will be monitored monthly for one year <br />January 1981) to collect baseline data for the <br />area. Well 7 located in the reclaimed spoil a <br />• monitored monthly during this period. <br />levels from all 10 <br />were installed late <br />(beginning with <br />permit apply.cation <br />rea will also be <br />-61- <br />