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completed in the overburden aquifer and monitored strictly for water levels. The surface <br /> water monitoring site, shown as an open diamond on Exhibit 7-1 , is proposed to be located <br /> just upstream of the mining disturbance on Calamity Draw. This site, will be continuously <br /> recorded for flow and periodically monitored for water quality. <br /> All monitoring sites are referenced to as proposed at the present time. Their <br /> installation is contingent on site accessibility and land owner approval . Alternate <br /> locations will be considered, should site access or owner approval preclude using the <br /> original locations. Reasonable efforts will be made to secure alternate locations before <br /> any proposed sites would be abandoned. <br /> As previously mentioned in the 1986 Nucla Mine permit revision package and restated in the <br /> 1978 Annual Hydrologic Report, Peabody is considering the installation of a surface water <br /> monitoring site in the postlaw reclaimed area above County Road 124A-A at the Nucla Mine. <br /> This monitoring site will be used to obtain surface water quality and flow data <br /> representative of runoff from postlaw reclaimed areas for bond release purposes. <br /> Installation of this site can only occur after regrading, retopsoiling and revegetation of <br /> the disturbed areas has been achieved. After reclamation of this area has been completed <br /> and prior to installation, Peabody will present to the CMLRD plans for construction of the <br /> monitoring site and monitoring parameters and frequencies for approval. <br /> Literature Cited <br /> Lara, O.G. and J. Davidian. 1978. Preparation of Input Data for Automatic Computation of <br /> Discharge by Slope-Area Method: Techniques of Water-Resources Investigations of the <br /> United States Geological Survey Book 7, Chapter C2. <br /> Rantz, S.E. and others. 1982. Measurement and Computation of Streamflow: Volume 1. <br /> Measurement of Stage and Discharge: U.S. Geological Survey Water - Supply Paper <br /> 2175. <br /> U.S. Environmental Protection Agency. 1983. Manual of Methods for Chemical Analyses of <br /> Water and Wastes: Environmental Monitoring and Suport Laboratory, Office of Research <br /> and Development, USEPA, Cincinnati, Ohio, 490 p. <br /> Yellow Springs Instruments. 1979. Operational Manual for YSI Model 33 Conductivity <br /> Meter, Yellow Spring, Ohio. <br /> 15-23 Revised 04/11/88 <br />