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Dear Mr. Baldwin: <br />In Reference To: <br />e_ <br />~: <br />,~~---e <br />~_: , ., <br />~,3E.ca,~_~, <br />~_L:.y <br />~® <br />r_~ <br />-~ ~ <br />^ <br />RWEB: 516.08a <br />y <br />Mining Permit # M/88/044 <br />This letter serves as a record of expenditures and progress report of our work <br />at the Coal Creek site through the first quarter ending March 31, 1992. <br />Progress Report: Spring time is here and the active field work is about to <br />begin! As I mentioned in our last report, we have not spent much time at the <br />study site during the winter months. However, we have been able to visit the <br />site once monthly to monitor the fifteen groundwater wells. At the beginning <br />of March we have seen quite an increase in the groundwater elevation in <br />response to the recent large snow and rainstorms. <br />Surface water runoff and increased groundwater levels have resulted in a <br />number of recent flow events at Coal Creek. We were able to record discharge <br />data at the four transects during one of the flow events last week (attachment <br />1). This is the first flow data we have acquired and we hope to acquire more <br />flow data in the upcoming summer months. This will allow us to determine <br />stage and discharge relations for estimating discharge of future flow events <br />recorded at the crest stage gages. <br />In addition to discharge data, we have taken another set of photographs at <br />permanent photopoints along the centerlines of the four transects. We also <br />spoke with David Johnson, of Western Resources, a consultant retained by the <br />State Land Board to examine concerns over the longer-term integrity of the <br />site. We described to him in detail our work to date at the site including <br />preliminary results. <br />Plans: As usual, we will continue monitoring the fifteen groundwater wells at <br />least once monthly. With the snow gone, we will soon be able to traverse <br />survey the four transects to tie them together, in addition to resurveying the <br />transect belts to monitor changes in channel cross-sections. This will allow <br />us to note geomorphic changes associated with in-channel sand mining. We hope <br />iii iiiiiiiiiiiiiiii ~ <br />United States Department of the Intericr <br />FISH AND bVILDLIFE SERVICE <br />NATIONAL ECOLOGY RESEARCH CENTER <br />4512 McMurry Avenue <br />Fort Collins, CO 80525-3400 <br />In Reply Refer To: <br />FWS/Region 8/NERC <br />March 18, 1992 <br />Robert Baldwin, President <br />West Arapahoe Soil Conservation District <br />730 Simms Street, Suite 416 <br />Golden, CO 80401 <br />