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<br />3.0 PCC NUCLA WATER-SUPPLY REQUIREMENTS <br />An industrial-water supply is needed for use during <br />mining and reclamation, and Por use as an augmentation <br />supply. Estimates of the quantities oP water required were <br />obtained from several sources. PCC determined the water <br />requirements for dust suppression and construction compaction <br />make-up water Por the NVCLA and NUCLA EAST mining areas. <br />Inflow Prom the overburden aquifer into the NUCLA EAST pit, <br />and the resulting water-level change (which may impact water <br />rights and require augmentation) were calculated by GeoTrans, <br />Inc. using data supplied by PCC. Evaporative losses from <br />existing and proposed ponds were determined by GEOTRANS. <br /> <br />It is our understanding that the NUCLA mining area does <br />not have to be irrigated following reclamation, whereas PCC <br />is required to return the NUCLA EAST area to its premininq <br />land use and may need to provide water Por irrigation. <br />However, as existing water rights will not be impacted or use <br />oP the water changed, irrigation-water requirements will not <br />be addressed further in this report. <br />3.1 OPERATIONAL REQUIREMENTS <br />During the mining phase, PCC•s water-supply requirements <br />are in two major use categories, municipal and industrial. <br />14 <br /> <br />REVISED MARCH 2006 Attachment 2.05.6(3)(b)(v)-1-19 <br />