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• ~ • <br /> <br />RALSTON QUARRY ANNUAL REPORT <br />Crushing Equipment: The changes made in our crushing and overall <br />operations this past year continue to result in benefits for both <br />our operation and the environment. <br />During the winter of 1989, the "chip spread" located west and north <br />of the main crushing operation was eliminated entirely. There is <br />no longer a separate chip production area requiring its own <br />activities. As a result, there has been a significant reduction in <br />fugitive dust, both from the crushing operation itself and from the <br />front end loader traveling across the quarry floor feeding this <br />crusher. Further, a portable generator {diesel engine powered) <br />that ran the spread was eliminated as well. This move has improved <br />air quality, eliminating stack emissions, etc. <br />The incorporation of the chip operation into the main plant was <br />facilitated by the purchase of a new impact crusher. The <br />introduction of this piece of equipment into the spread, as well as <br />subsequent changes and improvements, have necessitated revamping <br />and upgrading other parts of the operation. Existing conveyors <br />• have been realigned. New conveyors have been built. Cone crushers <br />and screen decks have been repositioned to be more efficient and <br />productive. This activity is continually being done to constantly <br />strive for improvements throughout the spread. <br />Notwithstanding the above, there has been no change with regard to <br />the primary crusher (Baxter Jaw) and associated feed hopper and <br />ground conveyor. There was, in 1990, however, an addition to the <br />feed process related to this primary jaw crusher. A 992C <br />Caterpillar front end loader (12 cy machine) has been added to the <br />operation. As the mining activity (drilling, shooting and <br />extraction process) has moved further and further away (north) from <br />the jaw, it became necessary to increase the feeding capacity with <br />a larger machine. As a result of adding this larger, newer machine <br />we have also been able to eliminate an older, smaller one (988B <br />Caterpillar). The net result is that we still have two front end <br />loaders charging the feeder that feeds the jaw crusher. One 988B <br />Caterpillar wheel loader continues to feed this primary crusher <br />with material brought down from the higher benches by an 8K <br />Caterpillar dozer. In addition, we have added another BK <br />Caterpillar dozer to help the other one in bringing shot material <br />down from the upper- benches. <br />Security Fencing, Roads. Pit Configuration: Asphalt Paving Co, <br />continues to comply with Exhibit A of our application to the <br />• Jefferson County Board of Adjustments as it relates to fencing. As <br />„~,~,v.,w.~., <br />