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<br />5
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<br />In 1985, Mexico's pumping from its San Luis Mesa well field within five miles
<br />(eight kilometers) of the boundary near San Luis amounted to ~0,299 acre feet
<br />(37,373,000 cub~c meters). The following quantities were pumped in calendar
<br />years 1976 through 1985: .
<br />
<br /> Thousands of
<br />Calendar Year Acre Feet Cubic Meters
<br />1976 97,870 120,722
<br />1977 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
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<br />In 1985, as in the previous two years, Mexico's pumping of ground water was reduced
<br />because flood control releases from the dams in the U,S. resulted in ample waters
<br />into the river to enable gravity diversions by Mexico to serve its needs.
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<br />The U.S. Bureau of Reclamation (UBSR) has completed 21 of 35 wells on the u.S.
<br />side within five miles of the Arizona-Sonora boundary near San Luis for pro-
<br />tective and regulatory pumping and 18 of the 21 wells were pumped in 1985. The
<br />remaining 14 wells have been deferred until water supply needs make construction
<br />necessary.
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<br />The United States pumped from domestic, municipal, and irrigation wells located
<br />within five miles (eight kilometers) of the boundary near San Luis the following
<br />quanti ties:
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<br /> Thousands of
<br />Calendar Year Acre Feet Cubic Meters
<br />1976 22,738 28,047
<br />1977 22,990 28,358
<br />1978 17,900 22,079
<br />1979 25,418 31,353
<br />1980 28,527 ~5,188
<br />1981 38,463 47,443
<br />1982 40,954 50,516
<br />1983 16,707 20,608
<br />1984 15,467 19,078
<br />1985 " "
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<br />The Commission is continuing, under'Minute No. 242, its program for exchange of
<br />groundwater data for the major groundwater basins lying partly in the United
<br />States and partly in Mexico including the Colorado River delta area. The
<br />objective of the exchange is to make available hydrologic, geologic and water
<br />quality data in either country, to both Sections of the Commission to enable
<br />definition of existing or potential problems.
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<br />i'Data to be supplied later.
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