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A=COM <br /> Technical Memorandum—3 Dam Reslope Project <br /> October 5, 2017 <br /> Page 3 <br /> Photo 2—View of stepback area (for placement of excess fill), looking southwest(June 8). <br /> June 14, 2017 <br /> Regrading/trimming of the downstream slope of the original 3 Dam was in progress, using two <br /> Caterpillar D8T dozers, one with GPS elevation control on the blade. Both dozers were working from <br /> toe to crest each pass, pushing excess material uphill and across the dam crest to form a stockpile <br /> and to achieve a 41HIAV final grade of the downstream slope. Limited placement/compaction of the <br /> excess fill in the 3 Dam stepback area started in the last two days and was completed using a third <br /> D8T dozer(spreading the tailings in lifts and performing track compaction using the weight of the <br /> machine). <br /> The typical cut was about 0.5 feet at the toe and 4 feet at the crest. The exposed material at the base <br /> of the cut was the same or similar as observed on June 8. The operators left intact zones of several <br /> feet of tailings around piezometers that exist in the slope. That material will be trimmed to grade once <br /> the standpipes to the instruments are lowered. <br /> A total of approximately 520 If of the downstream slope of 3Dam had been regraded by day's end. <br />