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<br />. -7- <br /> SOUTH GIIA PUMPED DRAINAGE <br /> Year 1) Water Sa Unity Salt <br />. Period Acre-feet ppm Tons <br />Previous year to <br />Agreement Operations 1965 59,000 2,510 200,000 <br />1st year of Operation 1966 71 ,000 2,600 251,000 <br />2nd year of Operation 1967 62,000 2,600 220,000 <br />3rd year,of Operation 1968 69,000 2,650 248,000 <br />4th year of Operation 1969 62,000 2,510 211,000 <br />5th year of Operation 1970 59,000 2;420 195,000 <br />6th year of Operation 2 1971 66,000 2,320 208,000 <br />Final period of Operation ) 1972 36,132 2,310 113,267 <br /> <br />1) Operation year ' November 16 of preceding year through November 15 of <br />designated operation year. <br />2) November 16, 1971 through June 30, 1972. <br /> <br />5. Deliveries to Mexico on Arizona Land Boundary <br /> <br />. <br /> <br />The deliveries to Mexico across the Arizona Land Boundary at San Luis for <br />the final period were about 85,900 acre-feet, with an average salinity of <br />about 1550 ppm, Of the total quantity delivered, 40,400 acre-feet, or 47%, <br />comprised pumped waters from wells in the Yuma Valley. Exhibit 7 shows the <br />annual quantities delivered beginning in 1961, and the recorded salinity of <br />the Yuma Main Drain. <br /> <br />6. Summary of the Final Period of Operation <br /> <br />United States operations during the final period reflect an increase in the <br />salinity of waters delivered to ~lexico above Morelos Dam amounting to about <br />15 ppm over that achieved in the comparable period of the 6th year operation <br />by the United States under Minute No. 218. <br /> <br />7. Summary of Operations Under Minute No. 218 <br /> <br />During the six years and seven and one-half months of operations under <br />Minute No. 218: <br /> <br />. <br />