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System Operation <br />The water treatment ponds (long pond, T -1, T -2, P -9 and the refuse pond) at the No. 1 <br />Mine Site support the developed water resources postmining land use. Water from the No. <br />1 and No. 3 Mine flow into the long pond. Flow from the long pond is piped to pond T -1. <br />Discharge from pond T -1 flows in a open channel to pond T -2. <br />Water from pond T -2 can be directed to three locations as follows: <br />a. The water can be directed by open channel flow to pond 9. <br />b. The water can be directed by a combination of an open channel and a pipeline <br />to the ditch leading to the refuse pond. <br />C. The water can be directed by a combination of an open channel and a pipeline <br />to Outfall 001. <br />Water that flows to pond 9 can at times fill the pond. Water discharged from pond 9 flows <br />into the open ditch leading to the refuse pond. <br />The volume of water that reaches the refuse pond though the open channel ditch is <br />diminished by evapotranspiration and seepage into the surrounding soils. Based on the <br />diminished low flows, the Operator does not believe any significant amount of mine <br />seepage water will accumulate in the refuse pond. In any case, flow directed to the refuse <br />pond will be managed so the pond does not discharge. At least 2 feet of freeboard <br />measured from the invert of the emergency spillway will be maintained in the refuse pond. <br />Seepage water will be redirected to pond 9 or outfall 001 if the water level in the refuse <br />pond approaches the two foot freeboard threshold. <br />TR -28 4 -x (Rev. 07/14) <br />