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3a Maps delineating contributing sub - basins, diversion, and /or collection channels and sediment <br />pond <br />Response: <br />As no "higher sulfide" material stockpile exists, no design for such is possible or necessary. <br />3b Rationale for run -off estimation using SCE /NRCS curves <br />Response: <br />Since no "higher sulfide material stockpile" exists nor is anticipated, no such calculations are appropriate <br />for this site concerning the sulfide materials. <br />3c Peak flow calculations /analysis for each diversion and /or collection channel <br />Response: <br />Since no "higher sulfide material stockpile" exists nor is anticipated, no such calculations are appropriate <br />for this site pertaining to materials which contain sulfides. <br />3d Sediment pond sizing (volume) calculation /analysis for 100 -year, 24 hour event <br />Response: <br />Since no "higher sulfide material stockpile" exists nor is anticipated, no such calculations are appropriate <br />for this site in relation to high sulfide materials. The current work area occupies historically disturbed <br />areas, so, in relation to silt generation not more than 1 acre of new disturbance has occurred nor is it <br />anticipated to occur. The current storm water regulations exempt sites having disturbance of less than <br />one acre and we are currently in discussions with CDPHE concerning the site. <br />4 DRMS could not find storm water hydraulic analysis or design drawings for the channels, <br />ponds or spillways. (4a,1, ii, iii), 4b <br />Response: <br />There appears to be some confusion on the scale of this project and production rate for material that <br />might be mined. The site includes about 3 acres or disturbed ground, slightly more than would be <br />disturbed for a typical mountain cabin. That surface area being used in the operation has been <br />previously disturbed by past mining events and the modern footprint is nearly totally contained within <br />that same historical area. No point discharge sources (sulfide ores, etc.) are known to have historically <br />existed at the site, nor are any anticipated in the future. Future drainage patterns are anticipated to be <br />nearly identical to historical patterns. As a result, no sediment ponds, regulatory required diversion <br />