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Exhibit 1 (cont'd). COLORADO RIVER DECISION SUPPORT SYSTEM (CROSS) <br />USGS gaging stations used in calibration of the Water Resources Planning Model. <br />Colorado River Basin <br />No. <br />45 <br />46 <br />47 <br />48 <br />49 <br />50 <br />51 <br />52 <br />53 <br />54 <br />55 <br />56 <br />57 <br />58 <br />59 <br />60 <br />61 <br />62 <br />63 <br />64 <br />65 <br />66 <br />67 <br />68 <br />69 <br />70 <br />71 <br />72 <br />73 <br />74 <br />75 <br />76 <br />77 <br />78 <br />USGS Gage No. <br />09073400 <br />09074000 <br />09074800 <br />09075700 <br />09078600 <br />09080400 <br />09080800 <br />09081600 <br />09082800 <br />09084000 <br />09084600 <br />09085000 <br />09085100 <br />09085200 <br />09087500 <br />09088000 <br />09089500 <br />09090700 <br />09091500 <br />09092500 <br />09092600 <br />09093500 <br />09093700 <br />09094200 <br />09095000 <br />09095500 <br />09097500 <br />09100500 <br />09101500 <br />09104000 <br />09104500 <br />09105000 <br />09152500 <br />09163500 <br />Total: 78 <br />Period of record <br />(by water yr) <br />1965 - 1991 <br />1950 - 1991 <br />1969 - 1991 <br />1969 - 1991 <br />1976 - 1991 <br />1965 - 1991 <br />1964 - 1968 <br />1956 - 1991 <br />1964 - 1979 <br />1951 - 1972 <br />1958 - 1965 <br />1906 - 1991 <br />1967 - 1991 <br />1969 - 1986 <br />1922 - 1960 <br />1956 - 1961 <br />1956 - 1991 <br />1960 - 1965 <br />1937 - 1964 <br />1953 - 1982 <br />1957 - 1965 <br />1921 - 1982 <br />1967 - 1991 <br />1963 - 1968 <br />1921 - 1981 <br />1934 - 1991 <br />1922 - 1980 <br />1945 - 1957 <br />1945 - 1953 <br />1937 - 1943 <br />1941 - 1960 <br />1936 - 1991 <br />1897 - 1991 <br />1951 - 1991 <br />Years of data <br />27 <br />42 <br />23 <br />23 <br />16 <br />27 <br />5 <br />36 <br />16 <br />22 <br />8 <br />86 <br />25 <br />18 <br />39 <br />6 <br />36 <br />6 <br />28 <br />30 <br />9 <br />62 <br />25 <br />6 <br />61 <br />58 <br />59 <br />13 <br />9 <br />7 <br />20 <br />56 <br />95 <br />41 <br />Years of <br />observed data <br />27 <br />28.3 <br />22.1 <br />22.1 <br />16 <br />27 <br />5 <br />36 <br />16 <br />15 <br />8 <br />84.2 <br />25 <br />17.6 <br />8.5 <br />6 <br />36 <br />6 <br />15 <br />30 <br />9 <br />20.5 <br />25 <br />6 <br />22.5 <br />58 <br />59 <br />12.3 <br />8.4 <br />6.4 <br />20 <br />53.4 <br />83 <br />40.4 <br />complete <br />100 <br />67 <br />96 <br />96 <br />100 <br />100 <br />100 <br />100 <br />100 <br />68 <br />100 <br />98 <br />100 <br />98 <br />22 <br />100 <br />100 <br />100 <br />54 <br />100 <br />100 <br />33 <br />100 <br />100 <br />37 <br />100 <br />100 <br />95 <br />93 <br />91 <br />100 <br />95 <br />87 <br />99 <br />Appendix E E-26 <br />