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E%HIBIT C lIINING PLAN 1. Dates of mining: Summer of 1988 to fall of 1993. 2. Depth of topsoil salvage: 12" to as deep as soil goes. Topsoil to be applied on low areas of adjoining pastures. See Exhibit C. 3. Thickness of overburden: No overburden as gravel is right under topsoil. See Exhibit E. 4. Thickness of deposit to be mined: 10' to 20 until bedrock is reached within that distance. 5. Major components of the mining operation: 175' road across meadow from ranch road to pit. Movable crusher. See Exhibit E. 6. Dimension of gravel pit: 4.2 - 5 acres. 7. Dimensions of exisiting and proposed road: 12'x175' road from ranch road to pit. 1' of gravel dirt mix to be laid across meadow and then removed after gravel operation is completed, unless we decide to keep the road to service the fish pond. Ranch road to be regraveled wherever needed. 8. Water amount and source for operation: 100,000 gallons per day during washing operation which will be sporadic. 9. Ground water sediment-containment: Groundwater is encountered at 3'-4' in early summer and is 6' by mid-summer. I propose to dig a 200' long holding pond on the south end of the pit with 75' of gravel between the pond and stream. The water will be pumped out of the southern end of the pit into the holding pond every morning after the sediment has had all night to settle. The water will then drain through 75' of gravel into the stream. I have found overnight settling to be more than enough time for the water to clear. 10. Contacted Water Quality Control and will comply. 11. On site processing: Gravel will be crushed and/or screened using a portable crusher to 4 min. Sand will be washed, no water from the stream will be used. Groundwater at 100,000 gallons per day per operation. A copy of map for Colorado Department of Health is attached.