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pQ_y -III IIIIIIIIIIIIIIII- <br />PEABODY COAL COMPANY <br />wo.s..,, DW~doe <br />Ms. Kathy Begej <br />Colorado Mined Land <br />Reclamation Division <br />Department of Natural Resources <br />1313 Sherman Street <br />215 Centennial Building <br />Denver, CO 80203 <br />Dear Ms. Begej: <br />February 9, 1990 <br />The following is a summarization of our discussion of <br />January 26, 1990 concerning what additional monitors would <br />be necessary to further define baseline and during mining <br />hydrologic conditions at Peabody's Seneca II-W and Yoast <br />properties. <br />Seneca II-W <br />1. Baseline water flow and quality in the 005 pond <br />(Figure 1) drainage at the point of the proposed pond <br />is requested. If true alluvium exists within a § <br />mile distance downstream of the pond, an alluvial <br />monitoring well within the mile reach is requested. <br />2. Since baseline flow and quality data in the 009 and <br />010 (Figure 1) pond drainages has previously been <br />obtained, it will suffice for the permit application. <br />However, if true alluvium exists within a § mile <br />distance downstream of the ponds, alluvial monitoring <br />wells within these } mile reaches are requested. <br />3. A stream monitoring station on Sage Creek below the <br />009 pond confluence is requested. <br />4. In the II-W South area, overburden, coal, and <br />underburden monitoring wells for the potential Wadge, <br />Sage Creek, and Wolf Creek pits are requested. Water <br />level, water chemistry, and aquifer characteristics <br />for one well completed in each unit in each of the <br />proposed mining areas was recommended as an approach <br />to determining the significance of these units as <br />aquifers and the potential for vertical leakance <br />between the units. Concerns regarding downgradient <br />~~~~~vE® <br />F'EB 1~ 1~~0 <br />MINED LANA <br />RECLAMATION DIVISION <br />1300 Soulh Vale <br />FlegataX, Arizona 88001 <br />Ieoz1 na-szs3 <br />