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• <br />Af tar a caviar of the Seneca II~W 1995 AHR, the CDMG requested lie a November 12, 1996 <br />latter) historic values for TDS, eulf ntes, and total suspended solids (TSS) et upetrem <br />and dornetram site oa Sage Creek, Dry Creek, end evbbersoa Gulcb• Those data Deva bean <br />provided is Appendix 81 is the form of time versus concentration plots. By overlaying <br />these plots on a light table or window, the relative difference in concentrations may be <br />observed. SCC'a database marks the T55 plots with a "<" if a concentration is helot the <br />detection limlt, and a "e" if the concentration is between the detection liatit and the <br />practical quaatitation limit (the limit at which as aaalyais achieves a higher degree of <br />accuracy). <br />Surface Natar Site 6W~62W~aC7 (WSH7), This site is located oa Hubbarsoa Gulch upetrem of <br />the confluence of mine discharges contained is 006 Gulch. It¢ purpose ie to provide <br />uadlaturbed cater quality data. Moai[orlnq Dere began is April, 1987. Revier of lta <br />Dydrograph shows typical seasonal variation dve to saowpack runcff Sa the aprinq. TDe <br />peak flow this year was [De highest on record. Its TDS plot indl cotes a decieasiag tread. <br />NPD85 006 (NPDES 6). This site is located oa a tributary to Hubbersoa Gulch referred Co ae • <br />the 006 Gulch. Construction of the 006 Poad was completed October, 1989. This Doad <br />collects all mine discharges from the south mining area. Revier of the flow DydrograpDe <br />iadicete typical seasonal variation due to snowmelt runoff is the aprinq. TDe first <br />hydrograph supplied shots data for this year, the second shore all data collected since <br />the site began discharging. The rater year average flows If tom weekly measurmenta) since <br />this pond began to discharge are: <br />1996 0. 144 cfs <br />1995 0. 106 cEs <br />1994 0. 010 cfs <br />1993 0. 127 cfs <br />1992 0. 036 cfs <br />1991 0. 062 cfs <br />1990 0. 055 cts (goad did not completely fill un[11 Narch 29. 1990). <br />TDe sboye table indicates Dighest average flows oa record. Flow values for this Doad Dave <br />Deere affected Dy a 3.4 foot increase in spillway elevation oa July 31, 1991 and the • <br />installation of a 4 inch orifice oa the tie el Dipe on November 2, 1995 . Also, this pond <br /> <br />