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-2- Exhibit C - Pre-Mining and Mining Plan Map 1. You are correct when you state that the 100 ft. set back is not a part of the permit area and will not be disturbed. The 2' high flood control berm will be in the permit area - not in the 100' setback. A portion of the setback in the 110 area was disturbed as explained earlier in this letter to allow riprap to be placed to prevent further erosion. Therefore, the lA disturbed is being added to the 112 and will be reclaimed accordingly. The maps will be amended to indicate the acreage addition. 2. I will discuss the hydrologic questions of diversion of the army into the abondoned Booth Canal later. As stated at the beginning of this letter, 2.71 A are being added to the permit area and fees paid accordingly to address these concerns. The maps will be amended accordingly and supplied to you. 3. I agree that the mining phases in connection with the 110 permit area are unusual. Hindsight is great, and knowing what we know now, we would never have taken out a 110 permit, but would have developed a 112. Business pressures created demand for a rapidly permitted area and at that time, we felt that this was a good location. Sdhen we started extraction, we fou~d that this area had been potholed drastically before Valco's ownership and was not typical of the area. The mining phases are what we do intend to employ for this project for best utilization. The 110 area will not be worked again until mining from the west has been proceeded to that point. Exhibit D - Mining Plan 1. Valco will agree to stockpile topsoil and overburden (other than the flood control berm) on the west and north boundaries, but not on the south, to remove susceptible loss to the river or flooding. 2. SCS normally recommends 741/A of Western Wheatgrass on sopsoil stockpiles and Valco agrees to this. 3. Seeding overburden stockpiles has not been done before, but Valco will agree to use the same seeding as for topsoil if requested by the staff or Board. 4. The operator is still invstigating both feasibility and equipment availability for either dragline or dredge excavation. Since this operator is required to choose a mining method before operations begin, the appropriate technical revision will be filed. An NPDES permit was acquired for the 110 area (map enclosed). If dewatering should event- ually become practical, the discharge permit is already in place. 5. The 110 area will be added to the warrantied area and will be included in the proper category of disturbance later in this letter.