Laserfiche WebLink
• <br />reductions to target flow shortages for with diversion losses are <br />provided in Appendix F. The average annual reductions to target flow <br />shortages for these scenarios range from 9,221 ac -ft to 37,895 ac- ft <br />assuming additional flows can be protected and from 5,671 ac -ft to <br />37,754 ac -ft assuming additional flows cannot be protected. <br />Cost <br />The items that influence the direct costs of projects that involve <br />pumping from the mound are described in more detail in the cost <br />sections for Regions 1 and 2 groundwater recharge /return flow <br />projects. As previously discussed, it has been assumed that subsurface <br />investigations will be required. These were estimated at $3,500 per <br />probe. The number of wells required was based on the maximum <br />monthly amount pumped and an average pumping rate of 1,000 gpm. <br />Well installation costs were assumed to be $30,000. Wells and <br />pumping hardware will most likely need to be replaced in 10 to 20 <br />years, therefore, replacement costs were included. Piping costs (4,000 <br />feet of 12" diameter line at $5 /foot) were estimated to be $20,000 per <br />well. The capitalized cost associated with potential projects in Reaches <br />10, 17, 18 and 19 range from about $6.4 million to $19.8 million, as <br />summarized in Table 8.G.78. The resulting costs per ac -ft range from <br />$340 to $1,360 assuming additional flows can be protected and from <br />$340 to $2,150 assuming additional flows cannot be protected. <br />5. Yield Summary <br />All of the alternatives associated with groundwater are scalable to a <br />degree. If any of these alternatives are chosen for inclusion in the <br />eventual action plan, the magnitude and geographic focus of the <br />alternative may differ from the representative projects described in this <br />section. Consequently, the total yields described in this memo for each <br />alternative are specific to the assumptions the study team has made in <br />defining representative programs. <br />Table 8.G.79 summarizes the net hydrologic effects at the site, at the <br />top of the downstream reach, and at the habitat for each alternative. <br />Table 8.G.79 also provides a summary of the reductions to target flow <br />shortages at the habitat for each alternative evaluated. Based upon the <br />operational definitions of the groundwater alternatives used in this <br />evaluation, the average annual net hydrologic effects across the study <br />8 -G -76 <br />