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Attachment TP4SDM <br /> Page No.TP4SDM - 1 <br /> Permit No. CO-0044768 <br /> Mine Remediation Plan Tailings Pond No 4 Surface <br /> Drainage Modification <br /> Remediatin Part - SUnm\side Gold Corporation <br /> PO Boy 177 <br /> Silo crton CO 81433 <br /> Contact. Larry Perino <br /> Reclamation Manager <br /> 1. Description of Mining AcU\itics <br /> Physical Description of Conditions <br /> Surface runoff from approximately 16 acres is currently captured with no drainage outlet and forced <br /> to evaporate or percolate into the ground\�ater regime at the southwest corner of Tailings Pond No 4. <br /> It is probable that water percolating into the groundwater regime contacts mill tailings prior to <br /> reaching the groundx\ater. Surface runoff is isolated from the tailings material by a vegetated soil <br /> cap and Would be unaffected if allowed to exit the site prior to infiltration as stormwater runoff. <br /> This area was orignall,constructed with no surface drainage outlet because prior to 1990 the slopes <br /> were uncapped tailings and was contained as a BMP for the existing conditions. <br /> General Description of the Pro eci t Site <br /> The project area is located approximately 0.25 miles northeast of the Silverton town limit on <br /> Colorado Highway 110 and is the highway drainage ditch with the runoff area being the out-slopes of <br /> Tailings Pond No 4 See attached location map. <br /> Identification of Lands <br /> The project area is on land o\\ned by Sunm side Gold Corporation (SGC) although the drainage <br /> outlet wHI be across the Highway 110 Right-of-Way owned by the Colorado Department of <br /> Transportation (CDOT) and will require a CDOT utility installation permit. The area is also within <br /> Sunnvside's MLR permit area (M-77-378) and a Technical Revision approval from DMG will be <br /> required <br /> Latitude 37 degrees 49 minutes <br /> Longitude 107 degrees 39 minutes <br />