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PQ_y III IIIIIIIIIIIII III <br /> PEAWDY COAL COMPANY 1300 South Yale <br /> Wostom Division Flagstaff,Arizona 86001 <br /> (602) 774-5253 <br /> March 1, 1990 RECEIVE[) <br /> MAR 2 1990 <br /> Mr. Carl Mount MINED LAND <br /> Colorado Mined Land RECLAMATION DIVISION <br /> Reclamation Division <br /> 1313 Sherman Street <br /> 215 Centennial Building <br /> Denver, CO 80203 <br /> RE: Seneca II-W Mine Annual Hydrology Report <br /> State Permit No. C-82-057 <br /> Federal Permit No. CO-0067 <br /> Dear Mr. Mount: <br /> Enclosed please find three (3) copies of the 1989 Annual <br /> Hydrology Report for the Seneca II-W Mine. This report <br /> contains a compilation and analysis of all hydrologic data <br /> collected during the period extending from October 1, 1988 <br /> through September 30, 1989. Copies of this report were <br /> also forwarded to the Office of Surface Mining Reclamation <br /> and Enforcement to the attention of Rick Holbrook (Western <br /> Field Office - Denver) and Ron Sassman (Albuquerque Field <br /> Office) . <br /> The ground and surface water quality statistical summaries <br /> should be reviewed with caution. Those parameters which <br /> have censored values associated with the data set (i .e. , <br /> some of the trace elements) cannot be correctly analyzed <br /> statistically in Peabody's current database, and summary <br /> statistics for these should be disregarded. When <br /> reviewing these data, the reader should refer directly to <br /> the individual water quality analyses for determining <br /> which values are above or below the detection limit. <br /> Peabody is currently developing a statistical algorithm <br /> for the water quality database to address censored data <br /> sets. <br />