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<br /> <br /> <br /><.:::> <br />0:, <br />..,. <br />c. <br /> <br />HISTORY OF ;.,rATER RESOURCE IlEVELOP1v!F:NT <br /> <br />BaSin and '~thout the imported ~ater their ecor.or~c gro.'" ~ould be lim_ <br />i:ed. <br /> <br />Tourism as ar; industrj !-;as increased sif~nificar"_ly in reCe:1: years <br />because 01' the recrea'io"., develop",er.ts and the many n.tural ",trac'ions. <br />~:anufacturi"" as a basic industry is of' rela'hely minor importance in the <br />Upper Basir_. <br /> <br />Irrigated areas in the 1o.er ~olorado River Easin and in adjoinir.g <br />basins Usine Colorado River main stream Water 're hiRhly productive and <br />'he ",ricuItu",1 opera'1o,," ve'"J i,.tensif'ied. "ross crop valUes per <br />acre probably are greater ':.han any other area of comparable size in the <br />....orld '..'1. th a 1970 average U!'Oss crop i~;come of abou1, +400 per aCr~. <br /> <br />Tne Pacific SOu."hwest is Ot,e of the !!lost rapidly dev'elcping areas <br />in the hation. both industrially and PoPulation'"se. Colorado River <br />.ater for municipal and industrial purposes is supplIed '0 apprOXimately <br />130 incorporated to.ns and other co~munities in this area ."th a popula- <br />~ion of about 10 ~llion people. This Water Supply, which has been <br />abou' 1.200.000 acre-fee' annually in recent Years. is delivered through <br />the facilities of t~e ~etropolitan Water District. ~e Colorado River <br />supplies about 36 perCent of all of the developed water in t~e 4.800_ <br />square-mle sen"ice area. This wa:':er ranges from a minor SUpply for <br />Some entities to a complete SUPply fOr others. <br /> <br />16 <br /> <br /> <br />