PERMFILE40466 - Laserfiche WebLink

Home Browse Search

Exhibit D - Mining Plan The Colorado Aggregate Co., Inc. is engaged in mining of volcanic scoria. Volcanic scoria is used principally as a decorative ground cover and landscaping stone. The overburden or topsoil on the deposit ranges very irregualarly from 6 inches in depth to 30 feet in depth. This overburden is removed from the deposit and stored in as close ' an adjacent area that shows no sign of product. After the overburden, loamy or loam textured intermixed with reworked basalt is moved. Front end-loaders move in and mine the specific colors as needed. As the product is processed (crushed and/or screened) the various saleable products are stock piled for movement to rail- head. Rejects (non-saleable product) are stored near the crusher. There are no water diversions or impoundments. This deposit has been continousily worked since 1948. No water of any type, surface or underground has been encountered. The size of the area to be worked at any one time is im- possible to determine because each strata or section may contain as many as 4 different colors. There would be approximately 40 acres of major distuubance, plus approximately 10 acres of moderate disturbance at this time. No reliable time table can be established to help describe the mining operation because: (1) We do not know the extent of the deposit in terms of color, weight, or size of the material. (2) We do not know the actual depth of the deposit. This material cannot be core-drilled. We have touched bottom in one area. Based strictly on estimates, assuming uniform weight, depth and area, we estimate exisiting reserve, of approximately 3 million tons. (3) There can be no clearly defined sequence for each stage or phase of mining. We must exhaust the entire deposit and then reclaim the land. To the best of our knowledge, the stratum immediately beneath the material is silica sand.