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<br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br /> <br />March 1 996 Final <br /> <br />were total charges -- they include not only the kwh charges, but also all facilities and hook-up <br />charges. A representative unit cost of 7.2 cents/kwh was used in this analysis. Figured this <br />way the average energy cost was $10.01 per acre-foot of pumping, but the range was from <br />$2.74 to $46.73 per acre-foot of pumping. It should be emphasized here that the energy <br />costs to many individual members exceed this average value substantially. The power <br />coefficients exceeded 183 kwh/ac-ft at 25 percent of the irrigation wells and 310 kwh/ac-ft <br />at 10 percent of the irrigation wells. The energy costs for these groups of irrigation wells are <br />at least $13.18 and $22.32 per acre-foot of pumping, respectively. Additionally, some pumps <br />are powered with other energy sources, which probably are more expensive than electricity. <br /> <br />The costs to LAWMA's members of replacing the wells and pumping equipment were <br />estimated by assuming that they need to be replaced every 30 years at a cost of $30,000 per <br />well. Since LAWMA's members presently operate 419 irrigation wells in the main stem area, <br />and 72 of these irrigation wells are presently inactive, an average of 11.57 irrigation wells <br />would need to be replaced each year. Using a unit cost of $30,000 with this number of <br />irrigation wells, the total annual cost becomes $347,000. This total annual cost adds <br />approximately $5.73 to each acre-foot of pumped water when spread over 60,547 acre-feet <br />of annual pumping. This value has been increased to $6.00 per acre-foot to cover the <br />additional annual maintenance expenses. <br /> <br />These costs in dollars per acre-foot are summarized in the following tabulation: <br /> Maintenance <br />Repayment LAWMA and <br />Period Membership Energy Replacement <br />Interest Rate Charaes Costs Costs Total <br />30 yrs @ 2 % 4.22 10.01 6.00 20.24 <br />30 yrs @ 3 % 4.62 10.01 6.00 20.63 <br />30 yrs @ 4% 5.05 10.01 6.00 21.06 <br />40 yrs @ 2 % 3.73 10.01 6.00 19.75 <br />40 yrs @ 3 % 4.15 10.01 6.00 20.16 <br />40 yrs @ 4% 4.59 10.01 6.00 20.60 <br /> <br />25 <br />