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:~ - <br />INSPECTION REPORT - PAGE 2 <br />FILE N0. 82-20 <br />DATE: August 1, 1985 <br />OBSERVATIONS OF IMPORTANCE: <br />1. The inspectors were accompanied by Mr. Gydesen and Mr. Klein during the <br />inspection. <br />2. Prior to the field inspection, the mill process cyanide circuit was <br />discussed. Mr. Klein stated that they are no longer using the cyanide <br />vat leach circuit. The disposal pond was used only on a limited basis <br />and unreclaimed waters in the pond are being detoxified and monitored <br />for cyanide. Mr. Klein stated that they would like to use this pond for <br />water storage and use in the flotation mill process. It was discussed <br />that this would be possible if samples to determine water quality in the <br />pond were taken. It was discussed that a technical revision should be <br />submitted describing the plans to no longer use the cyanide circuit and <br />use the lined pond for flotation mill water storage. Financial warranty <br />increase to $10,000 was also discussed. This should be submitted if it <br />is decided that the cyanide vat leach system is to be used. See <br />Recommendation No. 1. <br />The mill building, the lined pond for cyanide tails disposal and the <br />conventional tailings disposal dam have been constructed. The Division <br />commends Mr. Gydesen on the fine quality control construction of these <br />structures. Mr. Gydesen has gone one step further to stabilize these <br />structures and control erosion by reseeding the downstream faces of the <br />lined pond and the tailings dam. It was discussed that certification of <br />these structures should be submitted to comply with permit conditions. <br />See Recommendation No. 2. <br />4. The lined pond (cyanide tailings disposal) was adequately fenced and had <br />at least ten feet of freeboard. It was discussed that because of the <br />location of this pond and berm top elevations, it may not discharge into <br />the conventional tailings dam, which acts as an emergency pond back-up. <br />Mr. Gydesen stated that he would either construct a spillway to control <br />flow routing between these ponds or construct another berm around the <br />(north side?) of the cyanide tailings pond to assure drainage of any <br />cyanide tailings pond outflow to the conventional tailings dam. See <br />Recommendation No. 3. <br />5. The conventional tailings dam was constructed in part at the west (?) <br />end with topsoil and suitable growth medium. It was discussed that this <br />was not the proper method of salvaging and stockpiling topsoil. The <br />inspectors also pointed out to Mr. Gydesen that suitable topsoil can be <br />salvaged to approximately 18 inches depending on the location. Mr. <br />Gydesen stated that he would remove the topsoil at the west end of the <br />dam and locate a topsoil stockpile in an area of limited mine activity, <br />within the permit boundary. See Recommendation No. 4. <br />6. Diversions and drainage control at this site are well constructed. An <br />access road with adequate ditching and berming is constructed just above <br />the lined pond. <br />