Precipitation annual maximum series (inches) Station ID: 39-6170 Station name: OAHE DAM State: SD Latitude (decimal degrees): 44.4419 Longitude (decimal degrees): -100.4175 Elevation (feet): 1660 Duration: 15 minutes 07/02/1977 0.30 08/22/1978 0.70 06/19/1979 0.50 08/31/1980 0.70 07/13/1981 0.70 06/06/1982 0.60 06/19/1983 0.40 07/25/1984 0.70 08/07/1985 0.50 08/06/1986 0.50 07/11/1987 0.50 08/03/1988 0.40 05/28/1991 1.10 07/07/1992 0.70 07/12/1993 0.90 07/06/1994 0.80 07/13/1995 0.80 08/02/1996 0.40 08/13/1997 1.20 06/17/1998 0.80 08/29/1999 0.70 07/24/2001 0.70 08/11/2002 0.60 07/04/2004 0.80 08/03/2005 0.30 08/18/2006 0.50 07/19/2008 0.60 08/09/2009 0.50 07/31/2010 0.70 Duration: 30 minutes 07/02/1977 0.50 08/22/1978 0.80 06/19/1979 0.60 08/31/1980 0.80 07/13/1981 1.10 07/20/1982 0.90 08/12/1983 0.70 06/03/1984 1.00 05/28/1985 0.70 07/10/1986 0.80 07/11/1987 0.70 08/03/1988 0.50 05/28/1991 1.30 07/07/1992 1.00 07/12/1993 1.20 07/06/1994 1.20 07/13/1995 1.00 08/02/1996 0.70 08/13/1997 2.00 07/02/1998 1.00 08/29/1999 1.00 10/09/2001 0.90 08/06/2002 0.90 07/04/2004 1.00 08/18/2006 0.80 07/19/2008 0.90 08/09/2009 0.70 07/31/2010 1.30 Duration: 45 minutes 07/02/1977 0.50 08/22/1978 0.90 06/19/1979 0.60 08/31/1980 0.80 07/13/1981 1.30 07/20/1982 1.10 08/12/1983 0.80 06/03/1984 1.30 05/28/1985 0.80 07/10/1986 0.90 07/11/1987 0.70 08/03/1988 0.60 05/28/1991 1.40 07/07/1992 1.20 07/12/1993 1.30 07/06/1994 1.30 07/13/1995 1.10 08/02/1996 0.70 08/13/1997 2.10 07/02/1998 1.10 08/29/1999 1.10 10/09/2001 1.00 08/06/2002 0.90 07/04/2004 1.20 08/03/2005 0.40 08/18/2006 1.00 07/19/2008 0.90 08/15/2009 0.70 07/31/2010 1.70 Duration: 1 hour 07/26/1961 0.60 07/10/1962 0.91 05/11/1963 0.68 07/10/1964 1.23 06/25/1965 0.36 08/20/1966 0.44 06/18/1967 1.57 06/08/1968 1.37 07/17/1969 1.15 08/06/1970 0.71 08/18/1971 1.10 07/09/1972 0.97 09/02/1973 0.47 05/30/1978 0.83 07/23/1979 0.55 08/31/1980 0.73 07/13/1981 1.28 06/06/1982 1.19 06/19/1983 0.73 06/03/1984 1.56 05/28/1985 0.73 07/10/1986 0.83 07/11/1987 0.73 08/03/1988 0.83 05/28/1991 1.28 07/07/1992 1.10 07/12/1993 1.19 07/06/1994 1.19 07/13/1995 1.01 08/02/1996 0.64 08/13/1997 2.02 06/17/1998 1.10 08/29/1999 1.01 10/09/2001 1.01 06/22/2002 0.83 06/10/2004 1.10 08/18/2006 1.01 07/19/2008 0.83 08/09/2009 0.73 07/31/2010 1.74 Duration: 2 hours 07/26/1961 1.11 07/10/1962 0.95 05/30/1963 0.83 07/10/1964 1.29 06/25/1965 0.51 08/19/1966 0.78 06/18/1967 2.11 06/08/1968 1.51 07/17/1969 2.08 08/06/1970 0.83 08/18/1971 1.15 07/09/1972 1.09 09/02/1973 0.55 07/02/1977 0.48 08/22/1978 0.96 07/23/1979 1.15 08/31/1980 0.77 07/13/1981 1.35 07/20/1982 1.83 08/12/1983 0.77 06/03/1984 2.60 05/28/1985 0.87 07/10/1986 0.87 07/11/1987 0.77 08/03/1988 0.96 05/28/1991 1.54 07/07/1992 1.15 07/12/1993 1.63 07/06/1994 1.25 06/21/1995 1.15 08/02/1996 0.67 08/13/1997 2.21 07/02/1998 1.25 08/29/1999 1.15 10/09/2001 1.25 06/22/2002 0.96 07/04/2004 1.15 08/18/2006 1.44 07/19/2008 0.96 08/15/2009 0.77 07/31/2010 1.83 Duration: 3 hours 07/26/1961 1.13 07/10/1962 0.97 05/30/1963 1.02 07/10/1964 1.32 06/25/1965 0.55 08/19/1966 0.86 06/18/1967 2.19 06/08/1968 1.54 07/17/1969 2.31 08/06/1970 0.90 04/19/1971 1.50 07/09/1972 1.11 09/02/1973 0.57 11/08/1977 0.50 08/22/1978 1.00 07/23/1979 1.20 05/31/1980 0.90 07/13/1981 1.40 07/20/1982 2.10 08/12/1983 0.80 06/03/1984 3.10 05/28/1985 0.90 07/10/1986 0.90 07/11/1987 0.80 08/03/1988 1.10 05/28/1991 1.70 07/07/1992 1.30 07/12/1993 1.70 07/06/1994 1.50 07/13/1995 1.30 05/27/1996 0.70 08/13/1997 2.30 07/02/1998 1.30 08/29/1999 1.30 10/09/2001 1.30 06/22/2002 1.10 09/23/2004 1.30 08/18/2006 1.60 07/19/2008 1.10 08/15/2009 0.80 07/31/2010 1.90 Duration: 6 hours 07/26/1961 1.14 05/16/1962 1.01 05/30/1963 1.15 07/10/1964 1.53 06/25/1965 0.58 08/19/1966 1.27 06/18/1967 2.30 06/08/1968 1.62 07/17/1969 2.36 08/06/1970 1.00 04/19/1971 1.82 07/09/1972 1.12 10/11/1973 0.87 11/08/1977 0.60 08/22/1978 1.01 07/23/1979 1.30 10/15/1980 1.30 07/13/1981 1.50 07/20/1982 2.20 06/19/1983 1.00 06/03/1984 3.50 05/28/1985 0.91 07/10/1986 1.00 07/11/1987 0.81 06/30/1988 1.50 05/27/1991 1.90 07/11/1992 1.50 07/12/1993 1.72 07/06/1994 1.70 07/13/1995 1.31 09/19/1996 1.10 08/13/1997 2.32 07/02/1998 1.31 08/29/1999 1.31 10/09/2001 1.31 09/09/2002 1.40 09/23/2004 1.80 08/18/2006 1.90 07/19/2008 1.50 08/15/2009 0.81 07/31/2010 2.00 Duration: 12 hours 05/16/1961 1.38 05/16/1962 1.30 05/30/1963 1.16 04/26/1964 2.08 06/25/1965 0.86 08/19/1966 1.41 06/18/1967 2.32 06/08/1968 1.64 07/17/1969 2.38 07/13/1970 1.03 04/19/1971 2.17 07/09/1972 1.13 10/11/1973 1.26 11/08/1977 0.90 08/22/1978 1.10 06/19/1979 1.50 10/15/1980 2.30 07/13/1981 1.60 07/20/1982 2.22 06/19/1983 1.20 06/03/1984 3.60 05/28/1985 0.92 04/03/1986 1.01 05/20/1987 0.90 06/30/1988 2.00 05/27/1991 1.92 07/11/1992 1.70 07/12/1993 1.74 07/06/1994 1.72 06/21/1995 1.70 09/19/1996 1.40 08/13/1997 2.35 07/02/1998 1.33 08/29/1999 1.33 10/09/2001 1.40 09/09/2002 1.50 09/23/2004 2.20 08/18/2006 1.92 07/19/2008 1.52 02/09/2009 1.10 09/15/2010 2.40 Duration: 1 day 05/17/1961 2.02 05/16/1962 1.32 05/30/1963 1.18 04/27/1964 2.86 04/24/1965 1.04 07/13/1966 1.72 06/19/1967 2.07 06/09/1968 2.02 07/17/1969 2.40 08/07/1970 1.61 04/20/1971 2.05 10/06/1972 1.01 05/27/1973 1.53 04/12/1974 0.83 09/17/1975 1.66 06/13/1977 1.57 04/18/1978 1.14 06/20/1979 1.70 06/01/1980 2.59 07/13/1981 1.43 05/14/1982 2.68 05/12/1983 1.25 06/04/1984 3.39 09/07/1985 1.07 05/08/1986 1.37 05/20/1987 1.07 06/30/1988 2.57 09/20/1989 2.77 04/24/1990 1.05 06/04/1991 2.41 07/07/1992 1.52 07/07/1994 1.88 06/12/1995 2.04 08/14/1997 2.10 10/05/1998 1.70 09/03/1999 2.51 05/08/2000 1.60 07/11/2001 1.34 08/12/2002 1.34 05/12/2005 0.96 Duration: 2 days 05/16/1961 2.28 05/15/1962 2.55 05/30/1963 1.27 04/27/1964 3.60 04/24/1965 1.29 08/19/1966 1.85 06/19/1967 2.23 06/08/1968 3.63 07/16/1969 2.58 08/07/1970 1.73 04/20/1971 2.80 10/05/1972 1.59 05/26/1973 1.78 04/20/1974 0.89 09/17/1975 1.79 09/23/1977 1.76 04/17/1978 1.39 06/19/1979 1.92 06/01/1980 3.46 07/12/1981 1.54 05/14/1982 3.65 05/01/1983 1.79 06/04/1984 3.65 06/09/1985 1.15 05/07/1986 1.63 05/02/1987 1.15 06/29/1988 2.77 09/20/1989 2.98 04/24/1990 1.56 05/28/1991 3.46 07/11/1992 1.64 07/07/1994 2.12 06/22/1995 2.57 09/02/1999 3.16 05/08/2000 1.72 07/11/2001 1.44 08/12/2002 2.02 Duration: 3 days 05/15/1961 2.81 06/16/1962 2.81 09/01/1963 1.89 04/26/1964 3.63 06/24/1965 1.48 08/19/1966 1.87 06/19/1967 2.25 06/07/1968 3.79 07/15/1969 3.47 08/07/1970 1.75 04/20/1971 3.45 07/08/1972 1.61 05/26/1973 1.93 05/28/1974 1.24 09/17/1975 1.81 06/11/1977 2.11 04/16/1978 1.99 06/19/1979 1.94 06/01/1980 3.49 07/11/1981 1.56 05/13/1982 3.69 04/30/1983 1.98 06/04/1984 3.69 06/09/1985 1.17 05/07/1986 1.77 02/25/1987 1.48 06/29/1988 2.80 09/20/1989 3.01 04/24/1990 1.79 05/28/1991 3.49 07/11/1992 2.15 07/07/1994 2.14 06/22/1995 2.59 09/02/1999 3.19 05/08/2000 1.74 07/09/2001 1.46 08/12/2002 2.04 Duration: 4 days 05/14/1961 3.56 05/14/1962 3.08 09/01/1963 1.91 04/26/1964 3.67 06/24/1965 1.49 08/19/1966 1.89 06/16/1967 3.12 06/06/1968 4.50 07/15/1969 3.50 08/07/1970 2.47 04/20/1971 3.48 07/08/1972 1.63 05/26/1973 2.02 05/28/1974 1.25 09/17/1975 1.83 04/17/1976 0.80 06/11/1977 2.13 04/16/1978 2.24 06/17/1979 2.37 05/30/1980 3.53 07/11/1981 1.58 05/12/1982 3.73 04/30/1983 2.00 06/02/1984 3.73 06/09/1985 1.18 05/06/1986 1.79 02/24/1987 1.56 06/29/1988 2.83 09/20/1989 3.04 04/24/1990 1.98 05/28/1991 3.53 07/11/1992 2.23 07/07/1994 2.16 06/22/1995 2.62 09/02/1999 3.22 05/08/2000 1.76 07/23/2001 1.73 06/21/2002 2.26 Duration: 7 days 05/14/1961 3.86 05/14/1962 3.93 08/28/1963 2.18 04/27/1964 5.13 06/24/1965 1.70 08/14/1966 1.92 06/13/1967 3.22 06/06/1968 4.54 07/11/1969 3.62 08/07/1970 2.49 04/16/1971 3.52 07/08/1972 1.88 05/25/1973 2.10 05/26/1974 1.77 06/16/1975 1.85 09/18/1977 2.48 04/16/1978 2.26 06/17/1979 2.87 06/01/1980 3.56 07/11/1981 2.33 05/10/1982 4.04 04/26/1983 2.33 06/04/1984 4.95 09/07/1985 1.56 05/06/1986 1.81 02/23/1987 1.72 06/29/1988 2.86 09/20/1989 3.07 04/24/1990 2.35 05/29/1991 4.13 07/07/1992 3.67 07/07/1993 3.12 07/07/1994 2.18 05/08/1995 2.81 05/22/1996 3.30 08/14/1997 2.53 06/17/1998 2.26 08/30/1999 5.36 05/08/2000 1.78 07/24/2001 2.27 06/19/2002 2.39 Duration: 10 days 05/14/1961 3.90 05/14/1962 4.05 08/28/1963 2.20 04/26/1964 5.63 06/22/1965 1.82 08/12/1966 3.14 06/10/1967 4.23 05/31/1968 4.59 07/11/1969 3.66 08/01/1970 3.23 04/20/1971 4.47 07/08/1972 2.10 05/25/1973 2.40 05/26/1974 1.96 06/17/1975 2.03 06/13/1977 3.05 04/16/1978 2.82 06/16/1979 2.93 05/30/1980 3.60 07/13/1981 2.71 05/12/1982 4.30 06/20/1983 2.36 06/04/1984 5.70 09/03/1985 1.75 04/17/1986 2.21 05/20/1987 1.98 06/22/1988 2.89 09/20/1989 3.10 04/24/1990 2.41 05/28/1991 5.87 07/06/1992 3.82 07/10/1993 3.52 07/07/1994 2.20 05/01/1995 3.10 09/18/1996 3.75 07/24/1997 3.33 06/09/1998 2.76 08/30/1999 6.01 05/08/2000 2.98 07/23/2001 2.65 06/19/2002 2.41 09/04/2004 2.75 08/17/2006 1.89 09/10/2010 2.70 Duration: 20 days 05/04/1961 5.01 05/14/1962 6.06 05/30/1963 2.78 04/19/1964 6.39 09/13/1965 2.49 08/04/1966 3.20 05/31/1967 5.73 06/06/1968 5.51 07/06/1969 3.95 07/24/1970 3.95 04/16/1971 4.57 07/08/1972 3.37 05/19/1973 2.45 05/16/1974 2.31 06/08/1975 3.13 09/13/1977 4.07 04/12/1978 3.63 06/09/1979 3.39 05/30/1980 3.60 07/13/1981 3.88 05/10/1982 5.35 04/26/1983 3.88 05/27/1984 7.34 05/26/1985 2.74 05/22/1986 3.50 05/02/1987 2.26 06/12/1988 3.69 09/06/1989 3.64 04/22/1990 2.45 05/28/1991 7.08 06/27/1992 5.05 07/02/1993 5.16 07/02/1994 2.90 06/05/1995 5.41 05/08/1996 4.21 07/26/1997 4.28 06/06/1998 4.78 08/23/1999 6.11 05/01/2000 3.16 07/11/2001 4.15 06/19/2002 3.49 09/04/2004 4.55 05/26/2005 3.14 08/10/2006 2.74 07/17/2010 4.01 Duration: 30 days 04/22/1961 6.00 05/14/1962 6.72 05/10/1963 3.79 04/19/1964 7.50 04/24/1965 3.30 07/22/1966 3.43 05/26/1967 6.71 06/06/1968 5.70 06/22/1969 5.61 07/12/1970 5.36 04/20/1971 4.88 06/25/1972 4.12 05/19/1973 3.19 05/10/1974 2.78 05/19/1975 3.48 06/11/1977 5.09 04/16/1978 4.32 06/17/1979 4.33 05/30/1980 3.60 07/11/1981 4.54 05/11/1982 7.24 04/13/1983 4.21 05/25/1984 8.18 08/21/1985 3.00 04/24/1986 4.78 02/23/1987 3.24 06/12/1988 3.73 08/24/1989 4.22 04/24/1990 2.70 05/16/1991 8.52 06/15/1992 6.84 06/23/1993 5.74 06/17/1994 3.27 05/26/1995 6.79 05/01/1996 5.24 07/24/1997 5.86 06/05/1998 6.03 08/12/1999 6.20 04/19/2000 4.20 07/02/2001 4.99 06/19/2002 3.61 09/04/2004 5.76 05/10/2005 4.14 08/04/2006 3.35 07/07/2010 4.41 Duration: 45 days 05/04/1961 6.89 05/14/1962 10.36 05/10/1963 4.66 04/05/1964 8.11 04/12/1965 4.37 07/08/1966 5.17 05/13/1967 7.08 06/06/1968 7.26 06/11/1969 6.73 07/12/1970 5.51 04/20/1971 6.15 06/16/1972 5.19 04/20/1973 3.43 04/20/1974 3.70 05/10/1975 4.94 06/11/1977 6.49 04/17/1978 5.23 06/16/1979 6.67 06/01/1980 4.06 07/12/1981 5.14 05/10/1982 8.26 03/29/1983 4.37 05/02/1984 9.42 08/05/1985 4.07 04/13/1986 6.05 05/02/1987 3.70 06/22/1988 5.05 08/18/1989 4.36 04/22/1990 2.77 05/03/1991 9.63 06/08/1992 8.74 06/01/1993 6.96 06/06/1994 4.93 05/01/1995 8.00 05/04/1996 5.66 07/14/1997 7.18 05/10/1998 6.99 08/23/1999 6.80 05/08/2000 5.10 06/18/2001 5.68 07/08/2002 4.69 08/17/2004 6.08 05/07/2005 5.46 08/12/2006 4.34 06/19/2010 6.07 Duration: 60 days 04/22/1961 7.95 05/14/1962 12.75 05/10/1963 5.39 04/26/1964 10.56 03/27/1965 5.24 06/23/1966 6.15 04/21/1967 7.46 04/20/1968 8.34 05/20/1969 7.16 06/12/1970 7.22 04/16/1971 7.80 06/05/1972 5.91 04/20/1973 4.19 04/12/1974 4.67 04/29/1975 6.27 05/22/1977 7.52 04/02/1978 6.06 06/09/1979 7.06 05/30/1980 4.36 06/08/1981 6.40 05/11/1982 8.47 05/01/1983 6.71 04/26/1984 11.36 07/23/1985 5.10 04/13/1986 8.07 05/17/1987 4.55 05/02/1988 6.19 08/02/1989 5.00 04/24/1990 3.73 05/03/1991 10.74 06/08/1992 10.63 06/01/1993 8.51 05/21/1994 5.61 04/26/1995 10.58 05/04/1996 6.31 06/29/1997 8.75 05/09/1998 8.84 04/12/1999 7.87 05/08/2000 6.55 05/29/2001 7.72 06/19/2002 6.98 07/30/2004 7.52 04/20/2005 6.45 08/02/2006 5.29 06/06/2010 8.17