Country= U.S.A. Station= LEES FERRY, AZ. River= COLORADO R Area= 36439155.65 Lat= 36.86 Lon= -111.59 Source= USGS PointID= 9380000 Area Units= km2 Discharge Units= m3/sec Starting Year= 1972 Ending Year= 1995 Total Years= 24 Total Usable Years= 23 Year Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Avg Annual 1972 8.01 7.8 10.48 11.23 9.4 10.56 11.26 11.17 8.35 18.28 9.07 9.2 10.4 1973 8.99 11 11.79 10.99 8.07 8.95 10.98 14.76 9.5 7.34 8.59 7.38 9.86 1974 12.21 7.22 12.02 10.87 27.11 9.93 11.49 11.48 21.78 9.08 9.14 13.49 12.99 1975 21.71 17.18 10.15 17.65 19.98 13.89 10.88 11.33 14.35 12.1 8.18 7.88 13.77 1976 6.63 8.5 10.42 14.68 21.22 21.9 11.7 11.01 29.76 12.75 13.12 7.71 14.12 1977 18.95 12.73 9.66 11.15 20.99 13.25 10.83 26.29 23.76 8.12 9.64 10.04 14.62 1978 35.24 11.99 17.34 9.78 21.26 10.05 10.97 10.08 23.74 14.95 12.32 13.05 15.9 1979 13.17 5.37 9.42 12.37 10.57 9.83 11.19 13.51 13 11.21 10.38 10.12 10.85 1980 11.2 12.95 28.32 47.46 38.31 45.69 58.42 44.56 39.93 37.79 51.62 66.02 40.19 1981 46.64 10.98 17.35 14.35 12.4 11.51 12.22 16.12 9.97 8.39 8.48 13.03 15.12 1982 11.54 10.56 21.25 14.87 15.47 14.95 12.57 18.47 15.52 8.46 9.15 15.39 14.02 1983 84.05 44.77 15.85 52.66 61.27 229.29 690.3 746.2 635.34 641.61 440.8 351.68 332.82 1984 436.72 440.87 389.31 357.21 316.92 428.91 479.84 436.08 353.21 321.45 394.27 444.03 399.9 1985 410.69 365.9 227.61 127.66 163.33 265.1 266.08 276.28 259.68 129.93 100.55 182.75 231.3 1986 287.34 206.55 212.06 195.09 351.05 338.4 245.61 206.16 180.55 122.68 157.04 200.98 225.29 1987 320.49 134.57 62.42 41.45 31.59 28.18 30.32 39.12 44.89 26.18 16.86 15.19 65.94 1988 18.22 18.55 15.97 22.52 19.41 17 17.72 28.23 23.77 18.07 16.99 16.1 19.38 1989 15.28 13.43 15.39 17.6 16.06 15.81 19.12 23.8 18.24 15.41 13.26 12.07 16.29 1990 9.63 10.62 11.63 12.04 10.22 10.38 11.69 12.61 13.03 9.4 10.06 10.64 11 1991 10.52 8.39 17.76 13.15 12.12 11.97 10.95 12.13 15.05 10.33 10.27 13.86 12.21 1992 14.27 13.76 35.26 13.7 10.9 11.51 11.87 18.89 17.71 15.24 11.78 18.22 16.09 1993 11.46 8.91 22.75 13.68 11.31 12.96 9.37 10.54 10.5 9.74 7.75 9.68 11.55 1994 7.71 12.3 17.21 12.24 16.7 10.73 9.55 12.19 10.58 8.62 8.45 11.46 11.48 1995 -9999 -9999 -9999 -9999 -9999 -9999 -9999 -9999 -9999 -9999 -9999 -9999 -9999 Avg 79.16 60.65 52.24 45.84 53.29 67.42 85.87 87.44 77.92 64.22 58.16 63.48 66.31 Std Dev 134.13 115.89 92.16 79.05 92.27 118.42 171.34 174.22 147.09 140.91 116.39 115.92 110.92