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2012 <br />0.101 <br />cfs <br />(monthly measurements) <br />2011 <br />0.571 <br />cfs <br />(monthly measurements) <br />2010 <br />0.196 <br />cfs <br />(monthly measurements) <br />2009 <br />0.215 <br />cfs <br />(monthly measurements) <br />2008 <br />0.446 <br />cfs <br />(monthly measurements) <br />2007 <br />0.164 <br />cfs <br />(monthly measurements) <br />2006 <br />0.185 <br />cfs <br />(monthly measurements) <br />2005 <br />0.117 <br />cfs <br />(monthly measurements) <br />2004 <br />0.509 <br />cfs <br />(monthly measurements) <br />2003 <br />0.198 <br />cfs <br />(monthly measurements) <br />2002 <br />0.186 <br />cfs <br />(monthly measurements) <br />2001 <br />0.080 <br />cfs <br />(monthly measurements) <br />2000 <br />0.099 <br />cfs <br />(from monthly measurements as of 12/99) <br />1999 <br />0.184 <br />cfs <br />(weekly measurements) <br />1998 <br />0.317 <br />cfs <br />It <br />1997 <br />0.343 <br />cfs <br />" <br />1996 <br />0.144 <br />cfs <br />" <br />1995 <br />0.106 <br />cfs <br />" <br />1994 <br />0.010 <br />cfs <br />1993 <br />0.127 <br />cfs <br />1992 <br />0.036 <br />cfs <br />1991 <br />0.062 <br />cfs <br />" <br />1990 <br />0.055 <br />cfs <br />(pond did not completely fill until March <br />29, 1990) . <br />This year's average flow value is 3896 below the historic (1990 -2012) <br />average flow value, 0.296 cfs. The timing of when flow values are <br />collected affects these averages. Flow values for this pond have been <br />affected by a 3.4 foot increase in spillway elevation on July 31, 1991, <br />the installation of a 4 inch orifice on the riser pipe on November 2, <br />1995, and the dredging of this pond that occurred in the summer of 1996 <br />and the fall of 1997. An upstream pre - settling pond was added in March <br />1998. The principle spillway elevation was changed again, and the <br />dewatering orifice removed, in August 1998. In August 2003, an 18 -inch <br />riser pipe was installed on the discharge culvert, and the presettling <br />pond was removed. Additional dredging (and dewatering) occurred in the <br />l4 <br />