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The five monitoring wells within the mine area were completed by Dorchester <br />~ Coal Company in 1979, except MW-65, which was completed in late 1983. <br />EFCI reviewed avail able re cords of constru ction details for each well. <br />Construction informati on for the wells is summa rized below: <br />Surface Well Perforated Geologic <br />Well Measuring Depth Interval Completion <br />No. Point EI.• (Ft) (Ft. from surface) Interval <br />MW-8 6533 960 930 - 960 Pine Gulch seam, and roof <br /> of Jack O'Lantern seam, to <br /> within 13' of seam. <br />MW-10 fi318 402 342 - 402 Pine Gulch, Upper and <br /> Middle Jack O'Lantern seam <br /> sequence. <br />MW-16 6199 136 106 - 136 Middle and Lower Jack <br /> O'Lantern, and Red Arrow <br /> seam sequence. <br />MW-23 6175 179 149 - 170 Upper and Lower Red Arrow <br /> seam sequence. <br />MW-65 6455 1448 968 - 988 Upper, Middle and Lower <br /> Jack O'Lantern seam <br /> sequence. <br />• Monitoring reference point is marked on each well in the field, typically at the tap of <br />the well casing. <br /> <br />2.04.7-7a <br />Revised 11/12/97 <br />Technical Revision No. 29 <br />