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<br />e <br /> <br />5 <br /> <br />e <br /> <br />The above data show that the salinity in 1990 was lower than that of the <br />waters customarily delivered on the land boundary, which averaged about <br />1.540 ppm for the 10-year period 1963-1972. <br /> <br />Progress on United States Measures Provided for in Public Law 93-320 <br /> <br />Construction of the Yuma Desalting Plant is scheduled for completion by late <br />1992, according to the advice of the U.S. Bureau of Reclamation (USBR). <br /> <br />Groundwaters <br /> <br />Point 5 of Minute No. 242 provides that: <br /> <br />"Pending the conclusion by the Governments of the United States and Mexico <br />of a comprehensive agreement on groundwater in border areas. each country <br />shall limit pumping of groundwater in its territory within five miles <br />(eight ki1ometres) of the Arizona-Sonora Boundary near San Luis to 160,000 <br />acre-feet (197,358,000 cubi c metres) annually. II <br /> <br />In 1990. Mexico.s pumping from its San Luis Mesa well field within five miles <br />(eight kilometres) of the boundary near San Luis amounted to 136,077 acre-feet <br />(167.848.000 cubic metres). The following quantities were pumped in calendar <br />years 1975 through 1990. <br /> <br /> Thousands of <br /> Year Acre-Feet Cubic Metres <br /> 1975 - 106,227 131,030 <br /> 1976 97,870 120,722 <br /> 1917 129,636 159,905 <br /> 1978 98.235 121,172 <br /> 1979 23.562 29,063 <br /> 1980 14.378 17.735 <br /> 1981 120.586 148,742 <br /> 1982 131,738 162,498 <br /> 1983 18,190 22,437 <br /> 1984 7,266 8.963 <br /> 1985 30.299 37 . 373 <br /> 1986 10,789 13.308 <br /> 1987 52,253 64.453 <br /> 1988 127,585 157.374 <br /> 1989 140,700 173.551 <br /> 1990 136,077 167,848 <br />In 1990. Mexico continued pumping at a high rate to supplement gravity <br />diversions to serve its needs. <br /> <br />The USBR has completed 21 of 35 wells on the US side within five miles of the <br />Arizona-Sonora boundary near San Luis for protective and regulatory pumping <br />and 14 of the 21 wells were pumped in 1990. The remaining 14 wells have been <br />deferred until water supply needs make construction necessary. <br />