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Gilfillan Storm Pond <br />In 1998, Gilfillan Storm Pond was added to the monitoring program. For the next two years, the inflow of water was <br />cut off due to work being done on Highway 96. In one year the volunteer noticed a four -foot drop in water level. <br />The SDT readings were on an average of one foot (.4 meters). By the end of the 2000 season, the pond had nearly <br />gone dry. Year 2001 was still low and there were no SDT readings for 2002 or 2003. There is only one reading for <br />2004. Due to the dry weather in 2007, there was virtually no water in the pond. One sample was collected in May and <br />analyzed for TP & Chl A. The result was added to the historical data. I have not included the SDT data with graph <br />because there not enough points to create an accurate line. <br />Gilfillan Pond Historical TP/Chl A/SDT <br />Year <br />TP (µg/L) <br />Chl A (µg/L) <br />SDT (m) <br />1997 <br />1998 <br />59 <br />44 <br />i� <br />1999 <br />97 <br />12 <br />2000 <br />23 <br />57 <br />2001 <br />142 <br />13 <br />, , 4 <br />2002 <br />141 <br />42 <br />2003 <br />234 <br />41 <br />2004 <br />97 <br />2005 <br />101 <br />130 <br />2006 <br />344 <br />72 <br />2007 <br />202 <br />131.- <br />Gilfillan Pond Historical TP & Chl A Data <br />400 <br />350 <br />300 <br />250 <br />200 <br />150 <br />100 <br />50 <br />0 <br />1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 <br />—4— Avg TP ;--Avg Chi A <br />140 <br />120 <br />100 <br />J <br />80 0.0 <br />60 <br />L <br />V <br />40 <br />20 <br />0 <br />