Laserfiche WebLink
commit to maintain a 3H:1 V ratio for distance from the permit boundary to depth of <br /> excavation. If we find that the pit needs to be deeper for mineral extraction near the <br /> permit boundary, then a technical revision will be made to the permit addressing slope <br /> stability analyses to allow for excavations near the permit boundary. The exact locations <br /> of the excavations will depend on the trend direction and depth of the pegmatite veins. <br /> The excavations and stockpiles total volume will not exceed the total volume of cubic <br /> yards shown on Exhibit D, 6.3.4(2). Sloping of excavated area will be in compliance with <br /> U.S. Dept. of Labor, OSHA Section V: Construction Operations, Ch. 2, Excavations: <br /> Hazard Recognition in Trenching and Shoring, with regard to sloping excavated areas <br /> (https://www.osha.gov/dts/osta/otm/otm_v/otm_v_2.html). Specifically, including: <br /> IV. Determination of soil type <br /> V. Test equipment and Methods for evaluating soil type. (A pocket <br /> penetrometer will be used to measure the compressive strength of the soil to <br /> assist in the determination of safe sloping. <br /> VIII. Sloping and Benching. <br /> IX. Spoil <br /> We also add that the existing surface slopes are not excessively steep, and the estimated <br /> soil types are Stable Rock, Type A, and to a lesser extent Type B. <br /> 6.3.3 (1) (g) <br /> No roads will be created for the mining operations. An existing 4WD road will be used <br /> for mining access (FS road 754 & 754A). No new or improved roads will be made.All <br /> equipment will be "walked-in" from these 4WD roads to the excavations, and"walked- <br /> out" at the end of the season with as little disturbance as possible. All of the temporary <br /> access routes will be reclaimed at the conclusion of the mining project. <br /> 6.3.3 (1) (h) <br /> The operation will be a dry excavation. No water will be used during mining operations. <br /> 6.3.3 (1) (i) <br /> No ground water or surface water will be disturbed during mining operations. <br /> 6.3.3 (1) (j) <br /> N/A <br /> 6.3.3 (1) (k) <br /> No toxic or acid forming materials should be encountered from this operation. If <br /> encountered, the DRMS will be consulted. <br /> 6.3.3 (1) (1) <br />