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increasing. Baseline data from Site SW-52W-SG16 (WSH16) has been <br />provided in Appendix E1. <br />~_~ <br />It <br />- Surface Water Site SW-S2W-SG7 (WSH7). This site is located on <br />Hubberson Gulch upstream of the confluence of mine discharges contained <br />in the 006 Gulch, but is downstream of Ponds 016 and 017. Monitoring <br />here began in April 1987. Its TDS plot indicates an increasing trend. <br />Baseline statistics for this site have been provided. <br />- NPDES 006 (NPDES6) This site is located on a tributary to Hubberson <br />Gulch referred to as the 006 Gulch. Construction of the 006 Pond was <br />completed October 1989. This pond collects all mine discharges from the <br />central mining area. The first hydrograph supplied shows data for this <br />year; the second shows all data collected since the site began <br />discharging. Review of the flow hydrographs indicates typical seasonal <br />variation due to snowmelt runoff in the spring, with additional peaks <br />due to pit pumpage, pond clean-out, and rainfall events. The water year <br />average flow values since this pond began to discharge are: <br />2003 0.198 cfs (monthly measurements) <br />2002 0.186 cfs " <br />2001 0.080 cfs " <br />2000 0.099 cfs (from monthly measurements as of 12/99) <br />1999 0.184 cfs (weekly measurements) <br />1998 0.317 cfs " <br />1997 0.343 cfs " <br />1996 0.144 cfs " <br />1995 0.106 cfs " <br />1994 0.010 cfs " <br />1993 0.127 cfs " <br />1992 0.036 cfs " <br />1991 0.062 cfs " <br />1990 0.055 cfs (pond did not completely fill until March <br />29, 1990). <br />This years average flow value is 135$ of the historic (1990-2003) <br />average flow value, 0.147 cfs. The reason of the high average was in <br />part due to a high snowmelt runoff flow in early April caused by <br />IS <br />