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• and -17W produce waters that are unsuited for irrigation. <br />Figure 7-9 is the sodium-salinity hazard plot for the Wolf Creek Coal aquifer. Wolf Creek <br />Coal waters have a medium sodium and high salinity hazard, on average, and would require <br />careful irrigation practices for tolerant plants on permeable soils. Waters from Wells <br />CW-52W-2WC and -3WC are unsuitable for most irrigation uses. <br />Livestock Water Suitability. As can be seen in Table 7-20, fewer excursions occur when <br />Seneca II-W ground waters are compared with livestock standards. Waters from the Watering <br />Trough Culch alluvium and the Wolf Creek Coal aquifers have the fewest excursions and are <br />probably the most suitable waters for livestock use. Barium and chromium are the most <br />common analytes with concentrations that exceed the livestock standards. <br />Although there are fewer exceedences under the livestock standards than with any other use <br />category, the suitability of Seneca II-W ground waters for stock watering is still <br />questionable. The Watering Trough Gulch alluvium has the smallest number of excursions <br />and is probably most suited for livestock use. Waters from the Hubbe rson Gulch alluvium, <br />• Wadge Overburden, Wadge Coal, and Wolf Creek Coal are much less suited for livestock use. <br />Well Yield Suitability. In addition to producing good quality water, an aquifer also must <br />yield water in sufficient quantities for the proposed use. Seneca II-W aquifer properties <br />have previously been assessed in the "Aquifer Characteristics" portion of Tab 7, and <br />summaries are given in Tables 7-7 and 7-B. In general, the Seneca II-W aquifers are law <br />yielding. <br />Table 7-21 shows a comparison of aquifer properties with potential use. Since all <br />aquifers at Seneca II-W have transmissivities less than 10z ftz/day, there are no water <br />producing zones in the mine area capable of yielding water in suitable quantities for <br />irrigation use. Transmissivity values for the Wadge Overburden, and probably the alluvial <br />aquifers, fall within the poor to good range for domestic use, while the Wadge Coal and <br />Wolf Creek coal have transmissivities that lie in the infeasible to poor range. Although <br />no information is provided for livestock use in Table 7-21, it is reasonable to assume <br />that livestock yield requirements are similar to domestic requirements. <br />• <br />65 <br />