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Alluvial Valiey Floor Monitoring <br />The required surface water monitoring plan is stipulated below. Together with <br />the ground water monitoring plan stipulated in Section VI of this document, <br />and the proposed subsidence monitoring plan in Section 2.05.6(6)(f)(ii)(c) of <br />the appiication, the plan is sufficient to detect potential impacts to the <br />alluviai valley floor. The surface water monitoring plan is a refinement of <br />the monitoring plan contained in Table 10 of Volume 8 of the application. The <br />plan has been refined based on data collected since June of 1982, and <br />presented in a document titled "Grand Mesa Coal Company Water Monitoring" <br />submitted May 16, 1983. Map 1 shows the mine location relative to surface <br />drainage patterns. <br />Stipulation No. 7 <br />THE OPERATOR WILL CONDUCT SURFACE WATER MONITORING AS OUTLINED BELOW: <br />LOWER WARD CREEK <br />a. CONTINUOUS RECORD OF FLOWS APRIL THROUGH OCTOBER (REPORTED AS <br />MEAN DAILY FLOW). <br />b. MONTHLY MEASUREMENT OF pH, TEMPERATURE AND ELECTRO-CONDUCTIVITY. <br />c. QUARTERLY WATER QUALITY ANALYSES FOR PARAMETERS LISTED ON <br />ATTACHMENT B TO THIS DOCUMENT. <br />WILLIAMS CREEK AND UPPER WARD CREEK <br />a. MONTHLY MEASUREMENTS OF STREAM FLOW. <br />b. MONTHLY MEASUREMENTS OF pH, ELECTRO-CONDUCTIVITY AND TEMPERATURE. <br />IRRIGATION DITCH SITES sp-A, sp-C AND sp-D <br />a. WEEKLY FLOW MEASUREMENT FOR THE PERIOD APRIL THROUGH OCTOBER OF <br />EACH YEAR. <br />b. MONTHLY MEASUREMENT OF pH, ELECTRO-CONDUCTIVITY, AND TEMPERATURE. <br />c. QUARTERLY WATER QUALITY ANALYSES FOR PARAMETERS LISTED ON <br />ATTACHMENT B TO THIS DOCUMENT. <br />SPRINGS 1, 2, 3, AND 4 <br />MONTHLY MEASUREMENT OF FLOWS FOR THE PERIOD APRIL THROUGH OCTOBER OF <br />EACH YEAR. <br />SEDIMENT POND DISCHARGES <br />ALL NPDES RECORDS WILL BE SUBMITTED TO THE DIVISION QUARTERLY. <br />Complete water quality analyses on Williams Creek and upper Ward Creek are no <br />longer required. Likewise, water quality analyses for springs may also be <br />discontinued. Sufficient baseline water chemistry data has been collected. <br />The only potential for water quality impacts during mining is down stream from <br />the portals on Ward Creek and associated irrigation ditches. The potential <br />arises from the fact that ground water from the mine is pumped into the <br />sediment pond, and subsequently discharged to the Ward Creek system. <br />_22_ <br />