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Department of Water and Environmental Regulation HYANN V87 Output 29/01/2023 Site 612002 Collie River - Mungalup Tower Variable 151.00 Stream Discharge Volume in Megalitres Year Annual Days Rank Total Missing (Megalitres) ----------------------------------------------- 1969 54590 87 37 1970 150300 8 1971 126600 9 1972 45370 42 1973 160600 6 1974 375700 1 1975 94870 19 1976 35270 46 1977 60150 33 1978 92880 21 1979 23610 50 1980 64590 29 1981 124300 10 1982 115000 14 1983 286200 3 1984 97470 18 1985 117000 12 1986 44820 43 1987 29320 47 1988 217900 4 1989 82710 26 1990 118800 11 1991 169300 5 1992 152000 7 1993 89040 23 1994 57030 36 1995 102300 16 1996 315400 2 1997 50080 38 1998 82370 27 1999 94100 20 2000 90230 22 2001 12650 53 2002 46610 40 2003 64390 30 2004 58580 34 2005 115200 13 2006 26490 49 2007 75610 28 2008 45990 41 2009 100700 17 2010 7161 54 2011 85660 24 2012 39060 44 2013 85560 25 2014 61870 32 2015 14590 52 2016 57380 35 2017 49290 39 2018 63520 31 2019 20620 51 2020 28580 48 2021 103500 15 2022 38540 45 2023 7.4 338 55 Total 4921000 425 Minimum 7.4 Maximum 375700 Mean 89480 Median 75610