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1 <br />1 <br />1 <br /> <br />1 <br />1 <br /> <br />1 <br />1 <br /> <br /> <br /> <br />1 <br />1 <br />1 <br /> <br /> <br />1 <br />William J. Carter March 12, 1998 <br />Re: Response to Susan Burgmaier's comments on the 1996 Annual Hydrologic Report <br />Sanbom Creek is the mine water discharge from Outfall O l 1, for a distance of approximately 100 yards <br />where Sanborn Creek flows into the North Fork of the Gunnison River. <br />For 1996, the average total dissolved solids for Outfall Ol 1 was 2908 mg/I, with a maximum of 3540 <br />mg/I. For 1993, the first full year of discharge from Outfall Ol 1 and before estabhshment of the C- <br />Seam sump, the average total dissolved solids for Outfall 011 was 2713 mg/I, with a maximum of 3735 <br />mg/I. Graph 3 shows the total dissolved solids for Outfa11011. If lumping water, beginning in April <br />1994, had caused total dissolved solids in the mine water discharge to increase, the total dissolved <br />solids would be significantly higher than the data demonstrates. <br />Graph 3. TDS levels from the Mine Water Discharge. <br /> TDS levels from the Mine Water Discharge <br />4000 <br /> <br /> <br />3soo <br /> , <br />~y~ <br />~~ <br />,. <br />,' fay <br />3000 . <br /> ~ t ^cs <br />2500 ~ T~F~~"~~~ <br /> <br />.~ ,,+,,, .,. F. <br /> <br />~ <br /> <br />n <br />~pwi, r,. ~:;,~. <br />{,~~_,v <br />. <br />~Outfall 011 <br /> Y rf ~ ~ <br />A , <br />R~: <br />°~ Sanborn Creek <br />0 2000 <br />~ °' r-; 1,y <br />k ~ <br />~,. <br />s _ <br />~ ,,..55,,__~ <br />~;:ity Mine <br />h <br /> . <br />~ <br />" <br />~ Disc <br />arge <br />1500 r'` ` M <br />" <br /> <br />1000 <br />- <br />' `~" ' <br /> yvy arMh.~ <br />~9 <br /> ,4 ~ <br />~ ~~ <br />~ <br />500 ;• <br /> .'). <br />a <br />o kk?P '~ `~XL~~ <br />+: <br /> <br /> ~ ~ ~ <br /> <br />a ~ a <br />~ <br />a ~ <br />a ~ a <br />~ a ~ 0 <br />a ~ a <br /> Date <br />l~ <br /> <br />