Laserfiche WebLink
9/3/2014 SOUTHFIELD MINE <br />POND DISCHARGES TO SURFACE STREAMS <br />NOTE: The following data pertains to data taken prior to the pond design changes that occurred <br />during 2001 & 2002 wherein the primary discharges were changed to a vertical standpipe <br />(decant system) rather than the previous manual water -gate discharge near pond bottom. <br />Due to the pond's capacity and being designed to handle 24 hour, 25 year storm events, <br />there has been no known discharge from the pond since the design change (2002) to date. <br />POND #4(NPDES outfall #002) <br />Annual <br />Average <br />Date <br />Discharge pH <br />TSS <br />Total Iron <br />Settleable <br />(gallons) (field) <br />(mg/1) <br />(mg/1) <br />Solids <br />2002 <br />to September 3, 2014 - No Discharge <br />(ml/I/hr) <br />2001 <br />no discharge <br />2000 <br />no discharge <br />1999 <br />2,751,700 7.8 <br />74 <br />4.37 <br />0 <br />1998 <br />1,147, 800 7.45 <br />22 <br />2.19 <br />0 <br />1997 <br />no discharge <br />1996 <br />no discharge <br />1995 <br />455,386 8.8 <br />46 <br />4.12 <br />0 <br />1994 <br />320,836 8.09 <br />201 <br />17.35 <br />0.1 <br />1993 <br />no discharge <br />1992 <br />2,526,100 8.67 <br />229 <br />102.2 <br />0.35 <br />1991 <br />no discharge <br />1990 <br />no discharge <br />1989 <br />no discharge <br />1988 <br />no discharge <br />1987 <br />no discharge <br />1986 <br />no discharge <br />Grand Total Averages: 8.16 <br />114.4 <br />26.046 <br />0.09 <br />NOTE:* <br />The high iron analysis in earlier years of operation (1992 -1994) would have been due <br />to development and expansion of the coal refuse pile,s drainage area, prior to a <br />contemporanious reclamation phase inwhich 4 feet of soil cover & seeding was added <br />to the pile. <br />