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,A=COM <br />Technical Memorandum — 3 Dam Reslope Project <br />October 5, 2017 <br />Page 2 <br />June B. 2017 <br />Regrading/trimming of the downstream slope of the original 3 Dam was in progress, using one <br />Caterpillar D8T dozer with GPS elevation control on the blade. The work started at the north <br />abutment and was progressing to the south, with the goal of achieving a 4H:1V finished grade. The <br />dozer was working from toe to crest each pass, pushing excess material uphill and across the dam <br />crest to form a stockpile. No placement/compaction of the excess fill had yet been started. <br />Typical cut was about 0.5 feet at the toe and 1 to 2 feet at the crest. The exposed material at the <br />base of the cut was mostly yellowish -tan, fine to coarse, silty sand tailings, with little fine gravel and <br />trace medium to coarse gravel -sized pieces and occasional cobble -sized rock fragments. There <br />were also occasional pockets of reddish -brown, clayey silt tailings (possible slimes) of generally <br />medium stiff to stiff consistency. <br />A total of approximately 150 If of the downstream slope had been regraded by day's end. <br />Photo 1 — View of initial grading near the north abutment on June 8 (looking south). <br />