Country= U.S.A. Station= ARVADA, WY River= POWDER RIVER Area= 15668.57 Lat= 44.65 Lon= -106.12 Source= USGS PointID= 6317000 Area Units= km2 Discharge Units= m3/sec Starting Year= 1915 Ending Year= 1995 Total Years= 81 Total Usable Years= 72 Year Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Avg Annual 1915 51.44 70.41 98.02 291.26 255.78 145.64 111.52 145.89 88.07 139.28 164.84 103.66 138.82 1916 63.99 65.91 108.75 718.5 267.78 325.29 168.06 90.38 113.49 130.89 173 95.19 193.44 1917 62.96 69.51 108.52 454.71 218.42 196.29 97.09 94.78 77.71 92.04 83.96 64.96 135.08 1918 63.46 60.27 230.7 173.81 336.99 239.87 73.09 111.89 91.51 77.61 110.39 93.14 138.56 1919 82.4 75.61 181.23 345.34 152.82 261.33 128.88 174.41 72.79 111.24 290.77 93.16 164.17 1920 79.57 84.1 413.23 354.9 166.03 165.52 109.5 65.53 60.61 62.64 67.41 79.12 142.35 1921 61.48 66.05 253.76 309.07 210.07 159 62.91 53.81 64.53 60.99 51.37 53.45 117.21 1922 50.65 80.26 141.67 734.67 177.95 128.09 107.82 70.31 102.82 54.4 89.18 71.05 150.74 1923 63.1 73.88 64.94 434.09 188.23 184.32 115.17 64.21 74.79 51.45 50.83 49.5 117.88 1924 42.22 42.77 43.81 544.12 352.15 111.63 81.24 160 90.53 76.45 71.58 52.22 139.06 1925 45.75 55.94 106.29 131.82 75.22 218.06 86.63 55.81 57.47 81.84 85.27 63.82 88.66 1926 44.96 43.72 88.07 355.31 179.83 114.31 69.86 260.49 312.21 250.5 180.41 112.19 167.66 1927 105.81 97.41 454.28 319.14 173.5 181.21 182.27 81.02 81.81 150.53 135.87 79.63 170.21 1928 73.97 64.3 299.27 437.54 230.99 86.17 91.19 179.21 336.76 352.56 138.44 90.1 198.38 1929 100.08 102.63 388.94 542.88 216.74 155.39 171.99 91.3 79.58 72.41 73.91 63.97 171.65 1930 56.95 92.09 141.25 136.42 128.32 246.04 97.16 60.54 52.64 69.1 62.08 52.53 99.59 1931 61.58 53.59 59.51 89.65 57.88 124.55 68.02 45.26 65.69 69.13 200.55 116.26 84.31 1932 116.35 177.66 165.77 349.11 182.32 65.63 45.77 39.1 41.42 37.44 46.58 56.72 110.32 1933 61.06 85.5 109.63 321.1 208.76 95.94 59.54 47.08 37.46 38.5 43.04 43.98 95.97 1934 46.7 47.3 55.94 276.19 78.65 63.85 48.87 33.21 133.58 171.59 279.81 164.91 116.72 1935 112.88 116.82 462.86 236.51 199.07 218.64 165.22 115.68 79.49 77.31 103.65 76.75 163.74 1936 80.45 78.03 286 301.71 307.88 84.45 47.9 47.86 64.48 59.01 58.22 56.59 122.72 1937 61.69 68.32 111.51 429 202.8 72.58 48.24 49.97 45.25 59.94 63.08 56.9 105.77 1938 56.18 66.44 291.47 275.95 418.03 156.45 148.23 151.59 500.25 122.01 222.48 103.58 209.39 1939 143.62 120.43 309.73 337.49 182.5 339.38 117.73 78.85 84.71 77.15 68.66 66.18 160.54 1940 65.31 59.27 56.41 179.87 189.22 492.11 116.23 116.47 87.12 79.32 152.72 100.83 141.24 1941 111.63 102.24 97.68 374.51 134.51 129.9 66.15 65.56 447.57 367.5 256.15 127.36 190.06 1942 113.04 106.24 197.06 232.72 320.79 390.06 162.4 85.58 326.24 216.57 168.67 108.48 202.32 1943 110.3 109.37 148.28 397.83 192.25 554.02 147.5 107.84 94.79 103.41 132.1 93.49 182.6 1944 81.91 84.21 105.88 157.21 262.11 235.3 92.02 73.12 71.85 60.55 65.28 64.59 112.84 1945 63.57 61.94 310.63 274.38 209.03 190.93 95.08 79.99 112 90.45 187.93 102.57 148.21 1946 146.45 127.02 374.66 130.35 108.72 210.32 143.96 75.6 82.26 86.76 160.86 100.01 145.58 1947 98.31 98.1 89.6 262.87 203.29 146.68 90.07 89.19 80 69.75 73.51 64.17 113.8 1948 66.34 65.18 200.34 136.39 95.35 57.68 53.66 41.57 40.14 35.9 45.62 47.28 73.79 1949 48.6 61.05 124.25 162 114.53 58.46 109.82 71.13 60.95 59.65 67.62 71.03 84.09 1950 -9999 -9999 -9999 -9999 -9999 -9999 -9999 -9999 -9999 -9999 -9999 -9999 -9999 1951 -9999 -9999 -9999 -9999 -9999 -9999 -9999 -9999 -9999 -9999 -9999 -9999 -9999 1952 -9999 -9999 -9999 -9999 -9999 -9999 -9999 -9999 -9999 -9999 -9999 -9999 -9999 1953 -9999 -9999 -9999 -9999 -9999 -9999 -9999 -9999 -9999 -9999 -9999 -9999 -9999 1954 -9999 -9999 -9999 -9999 -9999 -9999 -9999 -9999 -9999 -9999 -9999 -9999 -9999 1955 -9999 -9999 -9999 -9999 -9999 -9999 -9999 -9999 -9999 -9999 -9999 -9999 -9999 1956 -9999 -9999 -9999 -9999 -9999 -9999 -9999 -9999 -9999 -9999 -9999 -9999 -9999 1957 -9999 -9999 -9999 -9999 -9999 -9999 -9999 -9999 -9999 -9999 -9999 -9999 -9999 1958 69.92 61.16 76.31 159.01 79.15 93.2 104.48 58.15 76.58 73.58 89.81 71.21 84.38 1959 71.06 60.08 66.98 267.79 137.53 71.39 83.66 104.15 261.65 330.4 163.25 141.37 146.61 1960 144.87 122.72 115.56 307.7 558.61 173.05 99.24 109.72 114.55 93.04 140.91 102.34 173.53 1961 90.13 85.19 223.23 234.23 203.96 94.27 70.04 77.74 76.42 98.68 148.21 122.78 127.07 1962 102.16 104.54 118.87 359.45 215.52 129.54 77.48 71.05 151.74 110.6 88.33 84.86 134.51 1963 88.22 76.31 162.27 159.38 188.31 83.54 58.43 45.4 49.82 49.24 51.65 51.8 88.7 1964 50.11 49.37 62.5 106.84 161.66 48.07 47.33 43.47 174.7 80.25 115.27 74.93 84.54 1965 81.03 71.43 114.91 542.38 311.06 153.37 73.02 72.61 162.75 117.36 136.82 224.51 171.77 1966 126.28 158.61 306.85 267.34 124.45 124.85 66.31 66.33 64.15 75.7 72.39 75.58 127.4 1967 86.48 90.72 156.87 628.49 134.58 238.08 124.49 83.41 84.11 88.87 89.58 78.63 157.03 1968 77.04 70.75 101.54 224.97 335.67 396.85 261.79 110.45 193.29 125.65 114.02 115.83 177.32 1969 140.79 146.24 191.25 389.94 239.31 260.29 148.99 88.83 79.02 74.59 72.6 79.4 159.27 1970 81.62 75.97 87.01 174.06 216.88 138.75 75.69 63.21 71.21 109.08 166.81 140.31 116.72 1971 109.79 107.42 136.01 482.24 201.82 131.02 90.07 82.45 83.95 129.26 125.6 146.81 152.2 1972 115.01 103.7 141.5 500.85 156.97 85.83 84.37 156 231.77 244.69 244.57 119.41 182.06 1973 158.27 132.73 543.23 421.03 554.36 170.59 94.64 91.56 101.51 90.87 94.78 89.69 211.94 1974 88.5 79.54 113.08 251.75 110.03 145.35 74.87 77.04 75.84 71.72 90.73 78.16 104.72 1975 81.99 80.85 96.27 385.47 160.56 130.88 78.72 65.7 106.36 68.55 138.1 143.26 128.06 1976 103.05 116.89 328.29 468.36 161.06 85.29 58.97 52.14 34.74 30.43 30.34 35.84 125.45 1977 44.95 37.75 79.89 152.01 67.84 53.16 51.43 38.17 95 116.84 147.32 133.75 84.84 1978 115.19 97.85 113.73 270.67 136.37 149.98 306.37 162.98 198.75 146.32 113.41 98.62 159.19 1979 94.47 97.28 343.55 428.57 307.21 271.99 98.27 96.62 77.14 111.69 153.66 106.78 182.27 1980 110.35 98.9 122.94 281.67 98.63 278.3 76.01 123.17 391.27 158.55 120.39 89.57 162.48 1981 89.06 147.75 114.41 266.56 210.3 219.61 124.12 101.85 79.86 120.94 86.25 75.83 136.38 1982 71.19 81.3 107.83 516.69 219 86.31 97.93 77.03 133.9 237.84 279.77 180.64 174.12 1983 130.85 130.21 364.02 236.64 215.24 128.43 81.53 74.37 111.67 161.22 217.87 130.58 165.22 1984 113.39 180.33 135 217.29 233.54 149.43 130.57 78.13 89.21 171.94 195.87 157.45 154.35 1985 109.24 108.98 283.48 349.32 144.83 97.98 80.17 103.71 192.99 360.14 290.63 141.74 188.6 1986 120.91 126.54 284.98 352.36 105.49 87.37 124.74 97.17 374.9 370.05 125.14 112.25 190.16 1987 102.76 91.41 126.81 102.13 47.25 48.28 45.12 41.57 36.55 43.52 72.93 84.35 70.22 1988 67.07 78.69 167.09 180.02 77.63 37.04 31.79 34.12 42.82 43.24 88.52 71.44 76.62 1989 69.18 67.53 173.27 177.82 135.58 126.9 46.6 45.55 37.98 35.63 40.72 32.32 82.42 1990 36.02 40.31 180.1 73.02 208.56 265.49 75.02 136.99 172.67 162.22 108.12 92.53 129.25 1991 83.98 88.2 337.78 314.25 270.99 273.29 118 93.45 92.21 91.67 249.27 209.59 185.22 1992 121.63 112.1 240.83 380.07 172.11 79.27 70.08 58.39 152.44 103.66 211.67 144.77 153.92 1993 101.89 107.84 144.36 383.45 309.4 552.54 116.05 89.45 146.02 106.64 109.03 93.05 188.31 1994 82.64 99.12 125.11 237.49 112.17 70.92 83.06 69.46 164.3 118.46 104.92 93.75 113.45 1995 -9999 -9999 -9999 -9999 -9999 -9999 -9999 -9999 -9999 -9999 -9999 -9999 -9999 Avg 86.47 89.16 184.27 311.94 198.92 171.33 98.75 86.33 124.95 117.21 126.6 95.35 140.94 Std Dev 28.82 30.64 112.73 142.64 96.94 110.72 46.57 40.04 98.8 80.89 66.21 38.02 37.02