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<br /> <br />• Geld 131tl MW 3tam Water Managee~t Plan Odeber Z4, 1995 <br />covered with a high density polyethylene liner. The entire pond area has been lined with <br />a thirty mil polyethylene liner. Excess water from storm runoff is decerrted from the <br />pond through risers on a decant line that sits above the tailings sand. The water drains <br />through a PVC discharge pipe that goes into en old mine tunnel (Hazel A) that is <br />bulkheaded near the portal. The storm runoff water is recycled from the storage in the <br />tunnel to the mill to be used as process water makeup. Excess grotmdweter end storm. <br />water stored in the Hazel A is pumped back to the tailings{ pond for evaporation. <br />The following areas are subject to the SWMP guidelines (stormwater): <br />• Area 3 -The arts above the tailings pond (Area 2), between Areas 2 end 5 is used for <br />storage of mill ma;.,~'.,•.,ce equipment Drainage fra~m this area is duetted by a berm <br />and ditch into the sediment trap in Area 4. <br />Area 4 -The area to the northwest of the mill building that commingles with nmoff water <br />from the east side of the mill building roof and water from the road on the east side of the <br />mill building. Storm water is collected in a sediment trap that is locetod at the bottom of <br />the roadway southeast of the tailings pond Any overflow goes overland and eventually <br />may go into Cash Gulch <br />• Area 5 -An undisturbed area which has all storm water drainage directed into a ditch <br />above Arse 3 and around the northeast side of the tailings pond The water is directed <br />into a small swale and into the Cash Gulch drainage. <br />3. Site M® <br />Exhibit A shows the Gold Hill Mill and dtavrage into Cash Gulch (intennitterrt), and Gold <br />Run Creek and the location of the mill with respoct to coeds end the coaununity of Gold <br />Hill. <br />The nrewent. feadrrrea man (Fxhihit. Rl shnwa the sits. hnrmdariea amr¢a matlc mill bnlldi[Ig, <br />_.__ r___... ___.__, ..r ~_.____. _~ -.__.._ _._ __._ _____.__, _--__- .___, , <br />parkmg area, storage area, tailings pond, tailings decun lint and pumpbadt line, diversion <br />ditches for tmdisturbed drainage, sediment trap and outfall, and boutderies of areas subject <br />to effluent limitatiaut guidelines. <br />4. Dererintiow oJ'Potewtial PolWtmrt Sorrreet/Materiallwvartorv <br />Ore is dumped in bins outside the mill building. Storm water cars fitter through the ore and <br />come out the bottom discharge of the bins. There is a potential for developing acid water and <br />piclang up heavy metals and suspended solids in the discharge. The discharge flows down <br />the southeast side of the mill building into an area that is harmed and has a.french drain that <br />carries storm water to the tailings pond <br />Storm [rmoff from the unpaved parkir~ area graded on dte old mine waste dumps cart develop <br />acid water end pickup heavy metals and suspended solids from the dump. The storm water is <br />collected at the bottom of the parking area in a harmed area and the french drain system <br />carries the water to the tailings pond. <br />All chemicals used in oro processing, such az soda ash, pine oil, acrd xanthate are storod <br />inside the mill building in enclosed containers. There is a potential for spills of the <br />