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Mr. Greg Sparks/Mr. Doug Murray Page 2 <br /> American Tunnel Sludge Disposal <br /> October 9, 1985 <br /> 1.5 Assuming that Section BB is at the low point of the dam and <br /> assuming a 2'0" final sludge freeboard, the volumes are presented <br /> below: ` <br /> ° Volume of contained water 1,5000,000 gallons 7460 cy i <br /> ° Volume of filling water level to crest <br /> minus two feet 2801x4461x4' 18540 cy <br /> Total Volume Existing 10/2/85 26000 cy <br /> Add 5.47 ft to dam as allowed by F. M. Fox 25300 cy <br /> Potential Total Volume 51300 cy <br /> 1.6 Current geotech date S+tin Fr2acno� �� � En �at�m(��7' <br /> Permeability of Tailings Pond No. 3Vis 321 ft to 1607 ft per year. <br /> Six feet is maximum additional height allowed due to slimes under <br /> dam at test hole #7. <br /> 2.0 Volume of sludge to be moved: <br /> Pond No. 1 8,000 cy <br /> Pond No. 2 4,900 cy <br /> Pond No. 3 3,700 cy <br /> Pond No. 4 1,400 cy <br /> Total late 1985 Volume <br /> to Move 18,000 cy <br /> The 18,000 cy is probably a 50% solid slurry or less and some shrinkage <br /> can be expected due to solar drying and field tests would be required <br /> to assess this amount on the existing sludge at the engineering ponds. <br />