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• iiiiiiiiiiiii <br />United States Department of the Interior <br />FISH AND WILDLIFE SERVICE <br />NATIONAL ECOLOGY RESEARCH CENTER <br />4512 McMurry Avenue <br />Fort Collins, CO 80525-3400 <br />,~ <br />~_ <br />~~~~ <br />_~ <br />~ ^ <br />October 19, 1993 <br />In Repl}~ Refer To: RWEP: 516.08A <br />FWS/Region 8/NERC <br />Robert Ilaldwin, President <br />West Arapahoe Soil Conservation District <br />730 Simms Street, Suite 416 <br />Golden, CO 80401 <br />In Reference To: Mining Permit No. M/88/044 <br />Deaz Mr. Baldwin: <br />This letter serves as a record of expenditures and progress report of our work at the Coal <br />Creek site through the third quarter ending September 30, 1993. <br />Progress; Renort: Mining activity has been rather slow this summer and, as usual, we have <br />been monitoring the groundwater wells twice monthly throughout the growing season. We <br />have continued to observe the same trend mentioned in the last report. That is, the water <br />table at the Transects 1, 2; and 3 seems to have reached a new equilibrium. The water [able <br />at Transect 1 appeazs to have leveled off at a higher elevation since we began monitoring <br />during tt~e summer of 1990. Furthermore, the water table at Transect 4 has remained <br />consisteru. On the other hand, Transects 2 and 3 seem to have equilibrated at a lower <br />elevation. <br />We mentioned to Dan Parker of the Soil Conservation Board some time ago what appeared to <br />be oil or fuel in some of our wells. This turned out to be cutting oil used in extending the <br />depth of our wells and not vandalism or a spill. <br />We completed the vigor assessments this year in record time. With two people assessing <br />vigor, we completed the task in less than half the time as in previous years. Vigor at <br />Transects 1, 3, and 4 has changed very little, if any. However, at Transect 2 (where the <br />heavy mining activity took place) there was quite a dramatic change in vigor (see graphs). <br />would estimate roughly 80% mortality at Transect 2. <br />Finally, we were able to begin the longitudinal survey of the channel. We established a series <br />of nine l~enchmazks along the upland on the west bank of the channel. From these <br />benchmarks, we will shoot in the channel to tie the four transects together. In addition, we <br />