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C <br />Frank. M. Graham, Jr. <br /> <br />June 22, 1988 <br />Please provide estimates of major, moderate, and minor disturbances <br />as described in Rule 2.12(4)(d) of the Mineral Rules and <br />Regulations. What acreage will be disturbed at the point of <br />maximum disturbance? <br />3. During my inspection, you stated that the pit edges will be mined <br />to a vertical slope and then subsequently backfilled. Please <br />describe this aspect of mining in more detail. Specifically, what <br />material will be used to backfill the pit edges, and what would the <br />maximum haul distance be? Do the pit walls need to be stabilized <br />prior to backfilling to prevent sutffing or does backfilling occur <br />soon enough after mining that this is not a problem? <br />4. Will there be arty overburden or reject material generated during <br />operations? If so, where will this be stored? <br />5. Is the crushing the only type of rock processing proposed? <br />6. Will gravel stockpiles be placed in the pit floor or in areas where <br />mining has not occurred? <br />Please state what minimum setback widths (in feet) will be <br />maintained between mining and property boundaries, reconstructed <br />ditches, adjacent residences, Boulder Creek, the Burlington <br />Northern Railroad right of wady, the gas well, petroleum pipelines, <br />power lines which transect the site, water, telephone, and power <br />lines which run along the property boundaries. In accordance with <br />Rule 1.56(5) of the Mineral Rules and Regulations, you need to <br />either demonstrate that the mining operation will not adversely <br />affect these structures or provide evidence of an agreement between <br />the operator and the structure owners that damage would be <br />compensated for by the operator. In particular: <br />A. Rerouted ditches: You have provided a copy of your <br />agreement wit a ditch rights owners, which states that <br />C) the water flow will be maintained and monitored. Please <br />provide evidence that the ditches will be sized correctly <br />for the anticipated flow quantities. What measures will be <br />taken to stabilize the ditch slopes from water erosion? <br />Please describe your plans to monitor the stability of <br />these ditches. <br />B. Burlington Northern's Railroad Right of WdY, Amoco's <br />eum nice ine, an water, to eo one and <br />roes: Please UesCrlbe your plans to protect these <br />res during and after mining and monitor the <br />effectiveness of your plans. Have the owners of these <br />structures been contacted regarding your specific plans <br />and, if so, da they have aqy concerns or recommendations? <br />Do you have an agreement to compensate them for anv damages? <br />