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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 />1207 <br /> <br />TASK D & E REPORT <br />SAN JUAN WATERSHED <br /> <br />0.1 <br /> <br />GENERAL <br /> <br />The purpose of this task report is to present the methodology for <br /> <br /> <br />determining practicably irrigable acreage (PIA) for the San Juan <br /> <br /> <br />Watershed. The test for PIA requires that the revenues exceed the <br /> <br /> <br />cost. The land under consideration when cropped and irrigated must <br /> <br /> <br />return sufficient net positive income to pay for the costs of <br /> <br /> <br />providing irrigation water to the farm headgate. In order to <br /> <br /> <br />determine PIA it is necessary to conceptually design an irrigation <br /> <br /> <br />transmission system to deliver water to the farm headgate for each <br /> <br /> <br />arable parcel. The annualized cost of the off-farm irrigation water <br /> <br /> <br />transmission system is compared to the net positive income (payment <br /> <br /> <br />capacity) of the parcel. <br /> <br />Arable lands were identified by Stoneman and Landers. Potential <br /> <br /> <br />crops, irrigation water requirements, on-farm irrigation systems <br /> <br /> <br />cost, and other related agronomic information were prepared by Boyle <br /> <br /> <br />and presented in Task A and B reports. Economic methodology and net <br /> <br /> <br />agricultural returns were prepared by Western Research Corporation. <br /> <br />This preliminary PIA analysis compares the preliminary net <br /> <br /> <br />agricultural return with the cost of water delivery from the primary <br /> <br /> <br />water source to the parcel headgate. For this preliminary analysis, <br /> <br /> <br />the highest net agricultural return for each climatic zone is used. <br /> <br />1 <br />