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<br />substantially less than the three year's time proven in 1974 reclamation. <br />The calculations presented use a reclamation period of 10 years. Also, <br />it is estimated that sediment transport will be further reduced using <br />contour furrows. <br />RESPONSE: <br />Table A of Exhibit 3, Life-of-dine IISL6 Calculations, was <br />produced to estimate sediment yield from tributatry watersheds over <br />the life of the impoundments. The "life" of the detention basins ie <br />assumed to be one year of mining and 10 yearn of reclamation under <br />the bond liability period. The parameters of the Universal Soil <br />Lose Equation (C and P) were determined based on average conditions <br />during the mining and reclamation phases of the operation. <br />Appropriate adustments to these parameters were made considering <br />productivity on revegetated areas and erosion control practices such <br />as contour furrows. The calculations in Table A are based on site- <br />specific, documented estimates (SCE Agronomy Note 50), and are <br />believed to be accurate. <br />e. If re-evaluation of the sediment yield increases the capacity <br />of the pond to above 2.0 acre-feet, then permanent water storage <br />rights are required. <br />The Hine No. 3 Detention Basin is designed considering the <br />following volumes: <br />-31- <br />