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Overburden Handling, <br />Colorado Stone only conducts underground quarry operations. The seam of marble is 280 to 300 feet <br />thick and is entirely exposed at the surface. It is anticipated that the north and middle entry will be <br />fenced to prevent access to the quarry. The south quarry entry will also be fenced. The utility portal <br />driven by CYMC in 1990 will be backfilled. <br />The effective overall slope of the final surface of the waste piles is between 1.6H:1 V and 1.8H:1 V. This <br />slope is similar to the slopes of the existing waste piles that have proven to be stable for the 49 years <br />between 1941 and 1990 when the quarry was inactive. It is Colorado Stone's position that a geotechnical <br />study of the waste pile slopes is not necessary. Such a study would rely almost solely on the history of <br />the existing waste piles. Based on this history, very reliable data is available upon which to base planned <br />final waste pile slopes. The slopes are consistent with the existing natural topography and will blend <br />well in the mountain terrain. Colorado Stone will continually monitor existing and new waste pile <br />slopes. If significant unstable conditions develop, corrective stabilization actions will be taken, either by <br />reducing the slopes or through mechanical stabilization methods, or by removing marble waste blocks. <br />The Marble Historical Society has requested that such historic features as the cable tower outside the <br />middle quarry entry and the marble waste piles remain after mining is complete. A letter from the <br />Marble Historical Society is attached to the original 1999 permit. A road will remain that traverses the <br />waste piles. The approximate alignment of the road is shown on Map F-1. The maximum width of the <br />road will be 15 feet, and will provide permanent private access to the quarry entries and the White <br />Marble No 2 Placer Claim. With permission from the owner of the quarry property, the road may be <br />used by jeep tour operators to allow viewing of the historic quarry workings by members of the public <br />not willing or able to hike to the quarry along the trail. The road will still be revegetated to prevent <br />sediment contribution from it to Yule Creek. Permanent fences will be constructed for public safety in <br />all quarry openings that are not backfilled. <br />Maximum disturbance of the land is anticipated at the end of the mine life when the marble waste piles <br />have reached their maximum size. However, the amount of land to be re-vegetated is limited to a portion <br />Yule Quarry April 10 34