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<br />"Pending the conclusion by the Governments of the United States and Mexico ofa
<br />comprehensive agreement on groundwater in the border areas, each country shall
<br />limit pumping of groundwaters in its territory within five miles (eight kilometers) of
<br />the Arizona- Sonora boundary near San Luis to 160,000 acre-feet (197,358,000 cubic
<br />meters) annually."
<br />
<br />In 1998, Mexico did not pump from its San Luis Mesa well field located within eight kilometers (five
<br />miles) of the boundary near San Luis. The annual volumes pumped from these well fields from 1975
<br />through 1998 are tabulated as follows:
<br />
<br /> ANNUAL VOLUME PUMPED
<br /> YEAR (THOUSAND CUBIC METERS) (ACRE-FEET)
<br /> 1975 131,030 106,227
<br /> 1976 120,722 97,870
<br /> 1977 159,905 129,636
<br /> 1978 121,172 98,235
<br /> 1979 29,063 23,562
<br />-- -- - - - --"-....... --~"..... u - ----.... -" ~ = "--. ~ ----=- =" - - 17,735 .. - - .- -- - - ~- - . r4;378~ -, - - 0 - -- -
<br /> 1980
<br /> 1981 148,742 120,586
<br /> 1982 162,498 131,738
<br /> 1983 22,437 18,190
<br /> 1984 8,963 7,266
<br /> 1985 37,373 30,299
<br /> 1986 13,308 10,789
<br /> 1987 64,453 52,253
<br /> 1988 157,374 127,585
<br /> 1989 173,551 140,700
<br /> 1990 ' 167,848 136,077
<br />- - ~ - - .. . - . . -. - . - - -.-
<br /> 1991 153,227 124,223
<br /> 1992 81,374 65,971
<br /> 1993 7,237 · 5,867 ·
<br /> 1994 76,281 61,841
<br /> 1995 48,830 39,587
<br /> 1996 81,039 65,699
<br /> 1997 36,576 29,653
<br /> 1998 0.00 0.00
<br />
<br />* The reduced pumping was due to excess delivery from the Gila River flood flows.
<br />
<br />The United States Bureau of Reclamation has completed 21 of the allowed 35 wells on the United
<br />States side, all located within eight kilometers (five miles) ofthe Arizona-Sonora boundary near San
<br />Luis, for protective and regulatory pumping. Construction of the remaining 14 allowed wells has
<br />been deferred until additional water supply needs make it necessary. Of the 21 completed wells, 6
<br />were pumped during 1998 for municipal and irrigation uses.
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