Laserfiche WebLink
• <br />April 13, 1991 <br />Page 13 <br />CONCLUSIONS <br />• <br />No impacts from mining on the hydrologic regime were observed in <br />1990. As presently operated much of the hydrologic data collected <br />has nothing to do with mining impacts. The springs and ponds that <br />discharge into the local drainages have little impact on the water <br />quality or quantity. Maximum combined discharge for the springs <br />and ponds in 1990 was less than 0.1 cfs. While no impacts on the <br />hydrology from subsidence have been observed; it is possible that <br />subsidence could reduce spring flows or dewater ponds. However; no <br />impacts on water quality can be expected. <br />In order to rationalize the hydrologic monitoring program Cyprus <br />Orchard Valley Coal Corporation makes the following proposals: <br />1 Water quality data should only be collected at selected <br />springs. Only those springs which discharge continuously <br />throughout each summer should be sampled. Only flow rate <br />should be collected from other springs monitored and only pond <br />C J <br />level data should be collected from each pond. <br />2 Continuously flowing spring monitoring should begin at least <br />one year prior to the angle-of-draw reaching the spring and <br />should continue for the permit period. <br />3 Other spring and pond monitoring should begin at least one <br />year prior to the angle-of-draw reaching the spring or pond. <br />Pond monitoring should be discontinued one year after the <br />