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• 8urlaee Watrr Site SW-92W-PGS (Y89F3). This sitr is situated on Sage Creek upstream of <br />the ispacts from the Seneca II-W Nine (and also 8CC's Yoast Nine). lbnitorinq at this <br />site commenced in September, 1990. Aevier o! the hydrograph indicates the second highest <br />peak flor on record occurred this year. The TD9 trend !or this site is nearly level. <br />NPD88 009 (NFDES9). This site is situated on a tributary to 9age Creek and ras <br />constructed in October, 1991. As of yet, no lion has occurred fr® this pond. Data from <br />the discontinued Surface Water 81tr SW-82W-803 (W983, period of record: July, 1979 to Nay, <br />1986) will be used in future A8R's ae the baseline data for this NPDES site. <br />surface Watrr eitr eW-92W-P64 (WS8P3). This site is situated on 9age Creek domatream of <br />the impacts Pram the Seneca II-W Mine (and also 8CC's Yoast Mine). Monitoring of this <br />site ~~""'+~ced in September, 1990. Fevlew of the hydrograph indicates the highest peak <br />!lw on record. The TD8 trend for this site appeazs to be increasing slightly, although <br />no aline discharges are present at this sitr yet. <br />rin s. Spring data may be found after surface ratrr data in Appendix 8. Data provided <br />• ass a water quality report for the year, hlatorlc floc measurements, a IAW888 plot of <br />field conductivities (corrected to 25° C since 10/1/89), and a hlatorlc listing o£ percent <br />millequivalenta of ma]or ions and TDB. In Appendix E, all springs have a WBPG prefix <br />(e.q., spring a-45 = W9F045). <br />Spring a-45, or the Olson spring, is not a florinq spring, but a three-foot Qias~eter cell <br />placed in the alluvium of Dry Creek. since a cell ras drilled on the Olson ranch in <br />eeptember, 1980, this "spring" has not been put to vac, although it is rater-righted for <br />stock use. The electrical conductivity (BC) plot indicates a decreasing trend. <br />spring a-1 is located in the channel of an ephemeral drainage that is an unnamed tributary <br />to gage Creek. Further dornatream in this drainage is the 009 Fond that ras eanetructed <br />in October, 1991. The 8C plot indicates an increasing trend. <br />Spring a-23, located at the head vatrrs of the 006 Gulch, is located in the channel of an <br />ephemeral drainage. This spring is upstream of proposed mining and should not be affected <br />by mining. The 8C plot Sndieatrs an increasing trend until 1995, at rhich time it <br />• decreased. <br />9 <br />