Laserfiche WebLink
Dames & Moore <br />' Texasgoif Minerals and `tetals, inc. <br />January 31, 1986 <br />Page -3- <br />' Also during 1985 wind erosion on the crest of old tailings dam no. 1 at <br />the downstream end of the permit area was repaired. The uneven surface which <br />' had been created by the •wind was smoothed and a blanket of about 1-foot of mine <br />waste cock placed over the crest. <br />' OBSGR~lATIONS <br />During our site visits we have observed the construction of the heap leach <br />project with its emergency dam, and observed the results of the improvements on <br />the crest of dam no. 1. The construction of the emergency dam incorporated the <br />recommended remedial actions Eor the "berm" that were part of our 1984 annual <br />' inspection. It is our opinion that the improvements to the crest of dam no. 1 <br />should minimize, if not prevent future wind erosion to the dam crest. <br />' Our observations of the east perimeter ditch discharge indicates that no <br />noticeable additional erosion occurred during 1985. <br />CONCLUSIONS <br />' Based on our site visits during 1935, it is our opinion that the remedial <br />' actions recommended as part of our 1984 annual inspection have been performed. <br />The construction of the emergency dam for the upper Carlton heap leach project <br />' has substantially improved the old tailings "berm." We did not observe any new <br />conditions for which we recommend remedial action. We do recommend that the <br />east ditch discharge continue to be observed for possible erosion which could <br />impinge on the heap leach emergency dam. <br />' 0 0 0 <br />1 <br /> <br /> <br />