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-20- <br />Judging from existing channel deposits, some fine - grained sediments <br />are eroded, transported and deposited over relatively short reaches of <br />the channel during these storms. Evidence of major debris flows are <br />not present in the area. <br />Runoff should be diverted around the leaching facility by ditches <br />designed to carry the probable maximum thunderstorm. Details of the <br />diversions are discussed in the Site Drainage section of this report. <br />GROUND-WATER HYDROLOGY <br />The locations of springs and registered wells in the vicinity of <br />the JD-5 lease are shown on Fig. 8. A summary of the springs is shown <br />on Table II and a summary of the registered wells on Table III. <br />Aquifers presently utilized as sources of ground -water in the region <br />are; (1) Alluvium along the San Miguel River, (2) Dakota Sandstone and <br />Burro Canyon Formation, and (3) Paradox Valley alluvium and leached <br />Paradox caprock. The closest wells, location Q on Fig. 8, are <br />located, about 4 miles northwest of the lease, on the Paradox Valley <br />floor. These wells were completed in the valley floor alluvium and <br />may tap the upper leached caprock of the Paradox Member of the Hermosa <br />Formation. The water from the wells is used for livestock. The <br />closest domestic well, location F on Fig. 8, is 7 miles east of the <br />lease. This well obtains water from the Dakota Sandstone and Burro <br />Canyon Formation. <br />The closest springs, springs 4 and 10 on Fig. 8, are located <br />about 3 miles southeast and southwest of the lease. Spring No. 4 <br />