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<br />In 1994, Mexico continued pumping its weUs at a high rate to supplement gravity diversions to serve
<br />its needs.
<br />
<br />The u.s. Bureau of Reclamation has completed 21 of the allowed 35 wells on the United States side,
<br />all located within eight kilometers (five miles) of the Arizona-Sonora boundary near San Luis, for
<br />protective and regulatory pumping. Of the 21 wells, 9 were pumped during 1994 for domestic,
<br />municipal, and irrigation uses. Construction of the remaining 14 allowed wells has been deferred
<br />until additional water supply needs make it necessary.
<br />
<br />The annual volumes pumped from 1975 to 1994 are tabulated as follows.
<br />
<br /> TOTAL VOLUME PUMPED MINUTE NO. 242 WELL FIELD VOLUME PUMPED
<br /> (THOUSAND ( ACRE-FEEn (THOUSAND ( ACRE-FEEn
<br />YEAR CUBIC METERS) CUBIC METERS)
<br />1975 33,401 26,787
<br />1976 28,047 22,738
<br />1977 28,358 22,990
<br />1978 · 22,079 17,900
<br />1979 31,353 25,418 201 163
<br />1980 35,188 28,527 2,244 1,819
<br />1981 47,443 38,463 23,394 18,966
<br />1982 50,516 40,954 29,068 23,566
<br />1983 20,608 16,707 4,856 3,937
<br />1984 19,078 15,467 3,721 3,017
<br />1985 16,818 13,635 2,531 2,952
<br />1986 32,497 26,346 3,367 2,730
<br />1987 33,213 26,926 4,215 3,417
<br />1988 29,512 23,096 3,073 2,491
<br />1989 63,020 51,091 35,430 28,724
<br />1990 71,721 58,145 38,050 30,848
<br />1991 53,000 42,968 38,461 31,181
<br />1992 38,696 31,371 28,319 22,958
<br />1993 18,473 14,976 8,001 6,486
<br />1994 40478 32816 20735 16810
<br />
<br />· Minute No. 242 Well Field was constructed in 1978.
<br />
<br />The Commission is continuing, under Minute No. 242, its program for exchange of groundwater
<br />data for the major groundwater basins lying partly in the United States and partly in Mexico,
<br />including the Colorado River delta area. The objective of the exchange is to make available
<br />hydrologic, geologic and water quality data in either country to both Sections of the Commission
<br />to enable evaluation of international groundwater basins conditions.
<br />
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