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-2- • <br />obtain the desired aggregate sizes. Further processing consists <br />of washing rock for concrete aggregate or the production of <br />paving materials using a bituminous asphalt plant. Dirty water <br />from the gravel washing operation is channeled to the settling <br />pond in order to prevent direct discharge to the river. All <br />crushers, washall plants, and asphalt plants used in i;his <br />processing are portable and are located throughout the pit area as <br />required. Time of processing is approximately one to two <br />months per year for each type of operation. <br />The processed material is stockpiled in the areas shown <br />on the general map expect for hot bituminous pavement which is <br />immediately hauled to the job site. <br />No stripping of topsoil or other overburden is performed <br />in this operation. The areas of excavation are river washed rock <br />and do not have any overburden. The areas shown on tkie soils <br />maps as containing topsoil are used as stockpile area:. and have <br />not had any topsoil removed. <br />The washed sand and gravel is used primarily to <br />produce concrete for the Durango area. Concrete is batched on <br />the premises and hauled to the job sites by truck. Tt~e haul <br />road from the pit area to U.S. Highway 550 is an existing road <br />approximately 25 feet wide and 700 feet long. This road is not <br />in the permit area and is not planned for reclamation. <br />