2009-02-26_REPORT - C1980005 ‎(7)‎

• Permit No: C1980005
• IBM Index Class Name: REPORT
• Doc Date: 2/26/2009
• Doc Name: 2008 Annual Hydrology Report
• From: Seneca Coal Company
• To: DRMS
• Annual Report Year: 2008
• Permit Index Doc Type: Hydrology Report
• Email Name: DTM
• Media Type: D
• Archive: No

evapotranspiration and the absence of lateral inflow from tributaries to
Cow Camp Creek. The TDS plot reveals a recently decreasing trend.
- NPDES Discharge Point 008 (NPDES8). The annual average flow values
for the water year since this pond began to flow are:
2008 = 0.117 cfs (monthly measurements)
2007 = 0.143 cfs "
2006 = 0.103 cfs "
2005 = 0.107 cfs "
2004 = 0.125 cfs "
2003 = 0.168 cfs "
2002 = 0.083 cfs "
2001 = 0.189 cfs "
2000 = 0.299 cfs "
1999 = 0.246 cfs (monthly measurements winter,
weekly rest of year)
1998 = 0.473 cfs
1997 = 0.606 cfs "
1996 = 0.479 cfs "
1995 = 0.337 cfs "
1994 = 0.157 cfs
1993 = 0.332 cfs "
1992 = 0.132 cfs (weekly measurements all year)
1991 = 0.112 cfs "
1990 = 0.067 cfs "
1989 = 0.108 cfs "
1988 = 0.104 cfs (reservoir did not completely
fill until February 25, 1988)
This year's average flow value, 0.117 cfs, is 49% below the historic
(1988-2008) average flow value, 0.230 cfs. Due to high sediment levels,
this pond was dredged out in 2002. In April 2005, it was noted that the
discharge pipe riser had rusted out. It was replaced in July 2005 with
an eight inch plastic pipe set at an elevation approximately four feet
above the elevation of the old dewatering orifice. No flow occurred
11