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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 />1 <br />2 <br />3 <br />4 <br />5 <br />6 <br />7 <br />8 <br />9 <br />10 <br />11 <br />12 <br />13 <br />14 <br />15 <br />16 <br />17 <br />18 <br />19 <br />20 <br />21 <br />22 <br />23 <br />24 <br />25 <br />26 <br />27 <br />28 <br />29 <br />30 <br />31 <br />32 <br />33 <br />34 <br />35 <br />36 <br />37 <br />38 <br />39 <br />40 <br />41 <br />42 <br />43 <br />44 <br />USGS Gage No. <br />09010500 <br />09011000 <br />09019500 <br />09021000 <br />09024000 <br />09025000 <br />09026500 <br />09032000 <br />09032500 <br />09033500 <br />09034000 <br />09034250 <br />09034500 <br />09034800 <br />09034900 <br />09035500 <br />09036000 <br />09037500 <br />09038500 <br />09039000 <br />09040000 <br />09041000 <br />09041200 <br />09041500 <br />09046600 <br />09047500 <br />09050100 <br />09050700 <br />09052800 <br />09053500 <br />09054000 <br />09055300 <br />09057500 <br />09058000 <br />09060500 <br />09060700 <br />09063000 <br />09064000 <br />09065500 <br />09068000 <br />09069500 <br />09070000 <br />09070500 <br />09071300 <br />Period of record <br />(by water yr) <br />1953 - 1991 <br />1905 - 1986 <br />1908 - 1991 <br />1954 - 1982 <br />1911 - 1991 <br />1934 - 1991 <br />1934 - 1991 <br />1935 - 1991 <br />1935 - 1960 <br />1937 - 1945 <br />1904 - 1956 <br />1982 - 1991 <br />1905 - 1991 <br />1959 - 1965 <br />1966 - 1991 <br />1933 - 1991 <br />1934 - 1991 <br />1905 - 1991 <br />1949 - 1991 <br />1954 - 1991 <br />1937 - 1983 <br />1938 - 1971 <br />1956 - 1974 <br />1982 - 1991 <br />1958 - 1991 <br />1943 - 1991 <br />1958 - 1991 <br />1960 - 1991 <br />1967 - 1991 <br />1944 - 1987 <br />1942 - 1991 <br />1967 - 1991 <br />1938 - 1991 <br />1904 - 1991 <br />1953 - 1980 <br />1966 - 1973 <br />1911 - 1991 <br />1948 - 1991 <br />1948 - 1991 <br />1951 - 1972 <br />1951 - 1972 <br />1947 - 1991 <br />1941 - 1991 <br />1977 -1991 <br />Years of data <br />39 <br />82 <br />84 <br />29 <br />81 <br />58 <br />58 <br />57 <br />26 <br />9 <br />53 <br />10 <br />87 <br />7 <br />26 <br />59 <br />58 <br />87 <br />43 <br />38 <br />47 <br />34 <br />19 <br />10 <br />34 <br />49 <br />34 <br />32 <br />25 <br />44 <br />50 <br />25 <br />54 <br />88 <br />28 <br />8 <br />81 <br />44 <br />44 <br />22 <br />22 <br />45 <br />51 <br />15 <br />Years of <br />observed data <br />38.3 <br />66 <br />35.67 <br />29 <br />81 <br />57.2 <br />57.2 <br />57 <br />26 <br />9 <br />23.4 <br />10 <br />83 <br />7 <br />26 <br />34.3 <br />58 <br />78 <br />3 8.4 <br />38 <br />36.5 <br />22 <br />19 <br />9.4 <br />34 <br />44 <br />34 <br />31.75 <br />25 <br />30 <br />32.25 <br />25 <br />54 <br />43.2 <br />28 <br />8 <br />61 <br />26 <br />37 <br />22 <br />12 <br />45 <br />50.8 <br />15 <br />complete <br />98 <br />80 <br />42 <br />100 <br />100 <br />99 <br />99 <br />100 <br />100 <br />100 <br />44 <br />100 <br />95 <br />100 <br />100 <br />58 <br />100 <br />90 <br />89 <br />100 <br />78 <br />65 <br />100 <br />94 <br />100 <br />90 <br />100 <br />99 <br />100 <br />68 <br />65 <br />100 <br />100 <br />49 <br />100 <br />100 <br />75 <br />59 <br />84 <br />100 <br />55 <br />100 <br />100 <br />100 <br />Appendix E E-25 <br />