©2009 Eagle Crest Energy Company

Eagle Crest Energy Company (ECEC) is proposing to use groundwater wells in the Desert Center area as water supply for its Pumped Storage Project (Project). ECEC will need water to initially fill the Project reservoirs and provide annual make-up water from evaporation and seepage. Based on preliminary analysis, three groundwater wells will be used to provide water for filling the Project reservoirs. This technical memorandum presents the analysis to estimate pipe and pump sizes, construction costs, and power costs. Additional information regarding seepage from the Project reservoirs and groundwater supply pumping effects can be found in the technical memorandums listed in the references. The locations of the three groundwater wells is uncertain at this time, however, six potential properties have been identified. The potential properties have been separated into Primary and Alternate Well Properties, which are shown on Figure 1. Based on the water supply pipeline alignments shown on Figure 1, we have evaluated several alternatives and developed estimates of pipe material, pipe sizes, pumping head, pumping costs, and construction costs for each. After review of several alternate system configurations a preferred system design was selected to minimize construction costs and power requirements. Using the Primary Well Properties the preferred groundwater supply well system would consist of the following main components