DART Adult Passage Count Rolling 4 Year Arithmetic Mean for Spring Chinook at Bonneville, Date Range 3/15-5/31
Year Annual Count 4 Year Rolling Arithmetic Mean
2017 * 83616 156928
2016 135770 156849
2015 220250 161888
2014 188078 148600
2013 83299 162677
2012 155928 170483
2011 167097 162585
2010 244385 137467
2009 114525 100484
2008 124334 90363
2007 66624 101443
2006 96456 132790
2005 74038 175879
2004 168656 255211
2003 192010 257482
2002 268813 219147
2001 391367 161529
2000 177740 92187
1999 38669 60568
1998 38342 53449
1997 114000 48906
1996 51264 48111
1995 10192 57324
1994 20169 69110
1993 110820 87608
1992 88115 80219
1991 57339 80630
1990 94158 90888
1989 81266 96866
1988 89759 97345
1987 98369 86553
1986 118072 75685
1985 83182 63670
1984 46589 58581
1983 54898 60152
1982 70011 59293
1981 62827 79256
1980 52874 93426
1979 51462 108446
1978 149863 121606
1977 119508 117774
1976 112952 123434
1975 104104 141622
1974 134535 146976
1973 142148 141080
1972 185704 148929
1971 125517 127078
1970 110952 116886
1969 173543 117275
1968 98302 94951
1967 84748 93201
1966 112510 90845
1965 84246 85494
1964 91301 89099
1963 75323 83566
1962 91106 80010
1961 98668 76025
1960 69169 85461
1959 61100 83978
1958 75165 111598
1957 136411 126487
1956 63237 134897
1955 171580 147611
1954 134720 133438
1953 170052 114080
1952 114093 84085
1951 114888 66229
1950 57289 70872
1949 50073 73433
1948 42668 71788
1947 133458 68757
1946 67533 51763
1945 43496 44993
1944 30544 52189
1943 65482 61071
1942 40450 63869
1941 72283 59498
1940 66070  
1939 76673  
1938 22967  
* 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 17:58:17 PDT. Columbia River DART (Data Access in Real Time) www.cbr.washington.edu/dart.