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SECTION I <br />Description of Industrial Activities <br />This SWMP has been prepared for the Parsons Mine, which will produce aggregates for use at <br />construction sites in the Greeley, Colorado vicinity. Figure 1 identifies the general location of <br />the facility, as well as the nearest receiving waters. Construction activities that will be present at <br />the site once active are as follows: <br />0 GRADING/MINING <br />Site will be leveled and smoothed according to final project specifications using a road <br />grader. Material may be excavated using earthmoving equipment and processed through <br />various feeders, screens, and crushers. This may include right-of-ways, drainage ditches, <br />and road sub-base areas of the project. <br />? QUARRYING <br />Drilling and blasting is used to liberate virgin stone from its natural consolidated state. <br />Haul trucks are typically used to take the material to the plant for processing. <br />¦ STOCKPILING (Check if applicable) <br />• OVERBURDEN AND TOP SOIL <br />Stockpiles may occur in the form of earthen berms. <br />• SAND AND GRAVEL <br />Raw and/or processed aggregates are stockpiled for future use. <br />• AGGREGATE MIX FOR CONCRETE PRODUCTION <br />Aggregate can be stored in stockpiles, and loaded into a ground hopper as needed, and <br />then conveyed to the plant. Material may also be loaded directly into a series of hoppers <br />located above the plant that directly discharge into the plant. <br />• AGGREGATE MIX FOR ASPHALT PRODUCTION <br />Raw material can be stockpiles or put into storage bins. <br />? ASPHALT MILLING <br />The existing roadway is milled, emptied into haul trucks and hauled off-site. <br />? ASPHALT PAVING <br />Hot mix asphalt is transported to the project from a production plant located off-site. It is <br />then placed, compacted and rolled according to project specifications. <br />? ASPHALT MANUFACTURING <br />A hot-mix asphalt plant blends together aggregate and asphalt cement to produce a hot, <br />homogeneous asphalt paving mixture, which is then hauled to off-site construction <br />projects. The aggregate used can be a single material, such as a crusher run aggregate or <br />Parsons Mine <br />Storm Water Management Plan <br />Page 4 of 19