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<br /> <br />. <br /> <br /> <br />- <br /> <br />- <br />~ <br />-- <br />. <br /> <br />GJQ88G <br /> <br />Highland Irrigation Company headgate 75 miles downstream of <br /> <br />Trinidad, the river emerges from the canyon and remains in a <br /> <br />?lains setting to its confluence with the Arkansas River. <br /> <br />Most of the irrigated lands served by the project are <br /> <br /> <br />supplied by ditches with headgates on the northeasterly <br /> <br />reach of the purgatoire River downstream of Trinidad (Figure <br />2). Return flows return directly to the river. The Model <br /> <br />tract of 6,000 acres is more than four miles from the river <br /> <br />and return flows from irrigation are tributary to Luning <br /> <br />and Van Bremer Arroyos. <br /> <br />Extensive climate variations occur in the basin. Aver- <br /> <br />age annual temperatures range from 41.5 degrees F. at the <br />8,800 foot elevation of NOrth Lake station, to 52 degrees <br /> <br />F. at the lower plains stations. Annual precipitation <br />ranges from 40 inches along the Culebra Range to 20 inches <br /> <br />at North Lake to 13 inches on the plains. Table 2 lists the <br /> <br />climate stations considered in this study. <br /> <br />-9- <br />