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<br />CD <br />(",., <br />0:> <br />(.J <br /> <br />CLIMATE <br /> <br />stations of the United St~tes Weather Bureau have been <br /> <br />maintained, with seme lapses, at Glenwood Springs from 1888 to <br /> <br />the present, at Rifle fr,~ 1910 to 1930, and at or near Silt from <br /> <br />1894 to 1909. The recorcs at these stations seem to be consistent <br /> <br />not only for the periods of concurrent recorc but in their entirety. <br /> <br />Differences in precipitation and temperature are such as seem <br /> <br />warranted by their difference in altitude, surroundings and ex- <br /> <br />pasure. <br /> <br />Glenwood Springs, the highest station has an altitude of <br /> <br />5,800 feet, but the Project lands extend to 7,200 feet altitude, <br /> <br />while Silt and Rifle are much lower than either the project or <br /> <br />Glenwood Springs. The average summer temperatures on the project <br /> <br />will therefore be several degrees lower than those at Rifle, with <br /> <br />less difference at other seasons. Precipitation, being c€termined <br /> <br />not only by al ti tude, but also by surrcuncings and exposure, will <br /> <br />be more nearly related to that at Rifle or Silt. <br /> <br />Table 1 indicates that precipitation varies roughly as the <br /> <br />difference in altitude between the three stations. While <br /> <br />there is more precipitation on the project land it will not be <br /> <br />commensurate with the change in altitude for the south side of the <br /> <br />valley is a quite dry region as the native vegetation shows. Yearly <br /> <br />variation at any station is extreme as is shown by the recorcs of <br /> <br />maximum and ninimum precipitation at Silt in the table. Mean <br /> <br />13 <br /> <br />/ <br />