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(jJ' "! 3 ) .1 1 .~ Summary of Water Resources in Mexico . . Demand is met by sourc~s of Colorado River water th3t include Surl~ICC waler delivered at the NIB. SIB. and the Limitrophc Division by the U.S. in satisfaction of the 1944 Treaty. and groundwater production from the Colorado River aquifer. NIB . Mexico diverts U.S. deliveries al the NIIl into the Alamo canal to irrigate approximately 44X,OOO acres in thl.' Mexicali Valley (depending upon the hydrology), and supply lllunicipal and industri<ll uses in the cities of Mcxicali, TeCalc. and Tiajuana.Rosarita. U.S. Deliveries at NIB V5. Diversions at Morelos Dam 6.000,000 _ OivaBion to Al~mo canal] - US Oeh~'.mes al NIB U.S. Olve,..lonat Y..., Delivery Morelo. at NIB~ Dam" ''''' 1,406.900 1.398.700 "" 1384,800 1,375400 "" 1451,700 1,395.500 "" 5,075.000 1,976,700 '''' 1,397,600 1.386.400 '''' 1593,600 1519700 '''' 1386,1lOO 1366.100 "" 2,755,500 2,065.200 '''' 4,586,500 2,180.300 ''''' 2,759,300 1,897700 2000 1898,600 1763.100 "" 1,566,300 'R 5.000.000 1.000.000 .-. 4,000.000 ~ . J! . - u ~ . E o "0 > 3.000,000 2.000.000 , 1990 1991 1992 1993 1994 1995 1996 1997 1998 1999 2000 Year SIB . U.S. deliveries at the SIB are routed to the Sanchez Mcjorada canal in San Luis, Sonora, whert' they are mi.xed with water delivered at the NIB and routed to San Luis via ;:l siphon beneath the Colorado River. . The sources of U.S. deliveries at the SIB are the Yuma Main Drain. East Main Canal Wasteway, West Main Canal Wasteway, and the U.S. 242 Wel1lield. . Approximately 66,000 acres in the San Luis Valley are irrigated by water supplies from the Sanchez Mejorada Canal and groundwater production from the San Luis Mesa Arcnosa wclllicld and wells localed in the valley SNWA Res(lurc~s4124'02