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<br />003100 <br /> <br />. <br /> <br />. <br /> <br />- 2 - <br /> <br />about 50,000 acres. Estimates of annual water use by sa1t- <br /> <br />cedar range as high as 9 acre-feet per acre. <br /> <br />Colorado is not immune from phreatophyte infestation. A <br /> <br />reconnaissance survey made in 1959 by the Colorado Water Con- <br /> <br />servation Board cooperating with the Extension Division of <br /> <br />Colorado State University showed a wide-spread infestation <br /> <br />along streams in. major river basins. The results of this sur- <br /> <br />vey are tabulated in table 1. Unless control measures are <br /> <br />taken in the near future, it can only be anticipated that the <br /> <br />infestation will become progressively worse. <br /> <br />Table l.--PHREATOPHYTES IN COLORADO (1959) <br /> <br />Acres <br /> <br />Colorado River Basin <br /> <br />Sa1tgrass <br />Willows <br />Cottonwood <br />Alder <br />Sa1tcedar <br /> <br />629 <br />37,490 <br />14,555 <br />6,327 <br />550 <br /> <br />Rio Grande River Basin <br /> <br />Sa1tgrass <br />Sa1tcedar - scattered <br />Wi llows <br />Cottonwood <br /> <br />7,816 <br /> <br />8,530 <br />5,363 <br /> <br />South Platte River <br /> <br />Sa1tgrass <br />Willows <br />Cottonwood <br /> <br />58,320 <br />13/131 <br />58;835 <br /> <br />.t '::- <br />