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DESCRIPTION OF DATABASE <br />Data contained in the database has been collected by various parties as <br />described in the summary which follows. All sites represent unmined conditions. <br />For sites which have been mined, only data collected prior to disturbance are <br />included. The enclosed map entitled, "Twentymile Park Surface Water Baseline <br />Hydrologic Sampling Stations" shows the location of all samples sites. <br />Sources of Information <br />Sites C1 & C2 - October 1973 to June 1974, pages 71 to 76 <br />In: McWhorter D.B., RLK. Skogerboe and G.V. Skogerboe 1975. Water Quality <br />Control In Mine Spoils Upper Colorado River Basin. <br />U.S. EPA, Environmental Protection Technology Series, EPA-670/2-75-048 <br />100 p. <br />Site C1 -July 1974 to December 1974 <br />C2 - July 1974 to June 1976, pages 1 to 16 <br />In: McWhorter, D.B., J.W. Rowe, M.W. Van Liew, R.L. Chandler, R.K. <br />Skogerboe, D.K. Sunada and G.V. Skogerboe. 1979. Surface and Subsurface <br />Water Quality Hydrology In Surface Mined Watersheds. Part II. Appendices. <br />U.S. EPA - 600/7-79-1936, 123 p. <br />Site C1 - October 1973 to December 1974 <br />C2 - October 1973 to November 1976 - pages 12 to 173 <br />In: Skogerboe, R.K., C.S. Lavalle, M.M. Miller and D.L. Dick. 1978. <br />effects of a Surface Coal Mine on Water Quality: Trout Creek Colorado <br />Compilation of Chemical Data. Natural Resource Ecology Laboratory CSU and <br />Fisheries Bioassay Laboratory MSU. 173 p. <br />Pond 1 - February 1976, data is from page 222 <br />In: Hounslow, A. and J. Fitzpatrick. 1978. Overburden Mineralogy as <br />Related to Ground-Water Chemical Changes in Coal Strip Mining. <br />U.S. EPA Research & Development Report EPA - 600/7-78-156. 299 p. <br />Foidel Creek EIS Site - 1975, data is from page EII-9 <br />In: USDI Bureau of Land Mangement, Site Specific Analysis, Volume, <br />Northwest Colorado Coal Final Environmental Statement. <br />Sites 1001, 2002, 3001, 3002 and 3003 <br />Represents data collected between May 1976 and November 1981 by the USDA <br />Agricultural Research Service Engineering Research Center in Fort Collins, <br />Colorado. <br />1001 May 1976 to November 1981 and April 1982 to October 1984 <br />2002 May 1976 to June 1981 <br />3001 September 1976 to November 1981 <br />3002 September 1976 to November 1981 <br />3003 May 1976 to July 1978 <br />