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a <br /> Analysis of Event : <br /> Tailings Pond #3 is a no discharge pond permitted by <br /> the MLRD for disposal of sludge from the American <br /> Tunnel and Terry Tunnel settling ponds . Because of <br /> freezing and thawing through the winter, ice had built <br /> up in the pond to a level actually higher than the berm <br /> elevation. When exceptionally warm weather occurred , <br /> this ice melting along with other runoff caused our <br /> problem as the melting ice and runoff was channeling on <br /> top of ice to a low spot in the berm. The pipeline to <br /> be installed will provide a free draining .line from <br /> Pond #3 to Pond #4 (our permitted discharge) . <br /> Installation of this line will not automatically <br /> prevent a reoccurence of the event as ice buildup could <br /> divert water away from the collection point , but <br /> correcting the situation if that occurs will be a <br /> simple matter of rechanneling the water, malting <br /> response time much quicker. <br /> The estimated quantity of discharge is an average flow <br /> of 10 GPM for a known time of approximately 2 . 5 hours . <br /> Attached is a sample analysis of the flow. <br /> If the above needs clarification or additional information <br /> is required, please contact me . <br /> Sincerely, <br /> Larry Perino <br /> Superintendent - Technical Services <br /> LP/cp <br /> xc: Camille Farrell , MLRD <br />