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between the historic USGS data and the DWR data. Generally, this gap occurs during the <br />years between 1979 and 1991. <br />Four maps, showing the locations of the monitoring wells, ha�e been added to this years <br />report. The weli identifiers given on each map indicate the page number and page position <br />in the report for which that well's measurement data and hydrograph can be found. <br />Personnei of the USGS gathered water le�el data prior tv 1983. Division of Water <br />Resource personnel, Ste�e Joliat, Glenn Graham, and Michael Schaubs have gathered <br />data since 1990. North American Chemical Company personnel gathered some of the data <br />fior well Nos. SC00109814ACD1 and SCD�109814ACD2 Iocated in Rio Blancv County <br />during part of the 1990's. The information contained in this report was compiled and <br />prepared for publication by Michael Schaubs. <br />Additional copies of this report may be obtained from the Colorado Division of Water <br />Resources, Public Records Section. The Records Section can be contacted at 1313 <br />Sherman Street, Room 818, Denver C� 80203, or by phone at 3�3/8fifi-3581 or 3�318fifi- <br />3447. <br />