Arizona republican., 1920-04-03

into the Gila, there. is a great reser- l voir basin, Which will provide unlim- tied storage for the flood waters of the Gila, by the construction of a great dam at the San Carlos site. This is the only reservoir site on the Gila river of any magnitude, and is the only one left, the others having been de- stroyed by the construction of railway lines through them.
 ''The neXt valley on the Gila below the San Carlos damsite is the Florence or Casa Grande valley, in the midst of which is to be found the famous Casa Grande ruins. This valley on the Gila river proper contains about 100,0 acres, but it stretches southMard and unites with and merges into the val ley of the Santa Cruz river Ga small, flashy tributary of the Gila). and thus provides a vast expanse of hundreds of thousands of acres of a very rich alluvial desert plain.
 The Florence or Casa Grande val ley lies wholly in Pinal county, Ari- zona, and is today the scene of the most intense and active development Here in the F'lorence-Ca Grande country in Pinal county was developed the Pima long staple cotton, which has within the past two years become world famous, spreading into the beau tiful Salt River valley, where stored water from the Roosevelt dam is aNdIlaDie, t0lS tOIlOIi IdS Ill6Idlly rev olutionized the agricultural interests of that great valley, and is rapidly piling up fortunes for the farmers of that county.
 Says Dam to Be Built Soon
 ''The Florence Casa Grande valley is the logical valley on the Gi1a river to be developed; is the nearest large valley to the headwaters for which stored water is necessary, and is the only valley on the GiIa for which large storage can be economically and feasibly provided. The construction of the San Carlos dam is, therefore, an absolute necessity, and, of course, will be under construction within a reasonably short time.
 The question of storage dam at San Carlos has been proposed for some time, but no very determined effort has heretofore been made to bring the true merits of this great project to the attention of congress and the country. Two very good reports have been made within the past several 1 years on the project, one by board l of United States army engineers in 1 1913 and 1914 and one by C. R. Old- l berg for the United States Indian ! service.
 Both of these reports are based on l early run-off records of the river at | the San Carlos site, which are quite | incorrect and too low. By |
  board. new gauge was established \ md arrangements made for complete < md accurate record of the run-off to De kept, and the records since 1914 show that more than a million acre eet of Iife-giving water has wasted 0 the sea through the San Carlos iamsite every year except one.
 "The storage capacity of the San Carlos reservoir basin is of staggering in it's higher contours. You may be interested in these fig Ires and, at the risk of tiring you, I will mention a few: "One hundred and so foot dam would store approximately 710,000 ' ere feet of water. Two hundred foot dam would store approximately 100000 acre feet of yater.
 1.-TWO hundred and twenty foot dam Fould store approximately 1885, 900 ere feet of water.
 1.-TWO hundred and thirty foot dam E. yould store approximately 1,530,000 { ere feet of water
 Two hundred and forty foot dam 1 youid store approximately 1,s50,000 :, ere feet of water Two hundred and fifty foot dam cres 12 inches deep. a "The capacity of the great Roose T cit dam is approximately 1,250.000 t ere feet. so that dam at San Carlos c 50 feet high would have storage ca | acity almost twice as large as that s [ the Roosevelt dam on the Salt river t