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85 during 1993. Chloride oor~trations were slightly elevated while all other <br />maaa,*,ar water quality parameters were within normal ranges. Porn 12-11 was <br />observed with no subsidence effects apparent during 1993. Pond 12-11 is located <br />outside the Zane of potential subsidence i~acts. Porn 13-2 was observed with <br />no subsidence effects apparent during 1993. Porn 13-2 is located outside and <br />downstream of the zone of potential subsidence impacts. Pond 13-4, which limos <br />upstream of the potential subsidence zone, was observed to be physically intact <br />during 1993. Pond 13-7 was undermined during 1992. No subsidence effects were <br />apparent at Pond 13-7 during 1993. Pond 13-8 was undermined in 1981. No <br />subsidence effects were apparent at Pond 13-8 during 1993. <br />Terror CYeek <br />'Three ponds were monitored in the Terror CrePJc drainage (refer to Table 5 aryl Map <br />• No. 4-1) during 1993. None of these ponds lie within areas of potential <br />subsidence given minim to date. Ponds 82 and 6-5 were observed to contain water <br />during 1993. Pond 8-4 was again observed with it's dam breached, a condition <br />prevalent since at least 1987. No subsidence impacts or other irregularities <br />were evident at any of these locations. <br />Coal Gulch <br />Four ponds were monitored in the Coal Gulch drainage during 1993 (refer to Table <br />5 and Map No. 4-1j. None of these ponds lie within areas of potential subsidence <br />given mining to date. Pond 83 overlies an area of the East mine inactive since <br />1984. This pond was observed to contain water during June 1993. Pond 84 is <br />situated beyond the zone of potential subsidence impacts and was observed to be <br />physically intact but dry during 1993. This is consistent with previous year's <br />• observations of this pond. Pond 17-1 was once again observed with it's dam <br />Y~reached, a condition prevalent since at least 1983, and Pond 18-1 was observed <br />li <br />