DART Adult Passage Count Rolling 4 Year Arithmetic Mean for Spring/Summer Chinook at Bonneville, Date Range 3/15-7/31
Year Annual Count 4 Year Rolling Arithmetic Mean
2017 * 171660 276884
2016 256081 278068
2015 381985 273893
2014 297812 247241
2013 176396 258285
2012 239382 263302
2011 275376 254337
2010 341989 214120
2009 196461 177116
2008 203525 166313
2007 114506 180893
2006 193975 228971
2005 153246 279539
2004 261846 358109
2003 306818 344770
2002 396249 284275
2001 467523 200157
2000 208492 118761
1999 64838 83482
1998 59775 73578
1997 141939 68084
1996 67377 65816
1995 25222 74818
1994 37800 87571
1993 132865 107906
1992 103385 102204
1991 76236 106704
1990 119141 120496
1989 110055 126784
1988 121387 126125
1987 131402 113025
1986 144293 98410
1985 107418 84872
1984 68987 79315
1983 72944 82037
1982 90140 85221
1981 85190 111233
1980 79877 130068
1979 85679 155551
1978 194186 171245
1977 160531 167806
1976 181808 174550
1975 148455 193084
1974 180431 206828
1973 187508 205683
1972 255945 227742
1971 203428 209007
1970 175854 203252
1969 275741 205415
1968 181008 176541
1967 180407 173977
1966 184507 163710
1965 160243 159731
1964 170753 160952
1963 139337 156858
1962 168591 159537
1961 165129 161655
1960 154378 188234
1959 150052 190566
1958 177064 216683
1957 271444 225946
1956 163706 215053
1955 254519 223979
1954 214117 208892
1953 227873 182086
1952 199409 149319
1951 194171 126916
1950 106893 121453
1949 96805 124443
1948 109797 118021
1947 172318 101323
1946 118853 77985
1945 71116 64543
1944 43005 68937
1943 78966 80162
1942 65087 85458
1941 88691 78622
1940 87904  
1939 100150  
1938 37744  
* 2017 annual count and mean may be incomplete, contains current year data.

Query Notes

  1. Rolling 4 Year Arithmetic Mean is calculated using the annual count, within the date range, for the specified Year and the three previous years.
Generated
24 Sep 2017 17:57:33 PDT. Columbia River DART (Data Access in Real Time) www.cbr.washington.edu/dart.