Laserfiche WebLink
• Steps to be taken for this project are as follows: <br />1. Re-establish sediment control for the bench and bench slope. <br />The 112 Pond will be covered to allow the establishment of the toe. <br />Calculations are included in the following section, Sediment Control <br />Calculations. <br />2. Establish a stable toe by reworking approximately 20,000 <br />cubic yards of material out to the edge of the projected toe. This <br />work will be done in increments to facilitate safe material handling <br />and water control. <br />3. Build bench to 100-year flood level with rewoiked or imported <br />dirt. This fill is included in the estimated 20,000 cubic yards of <br />material in step 112. The 20,000 cubic yard estimate includes assump- <br />lions for material requirements for toe stabilization and building <br />the bench above flood level. <br />4. Rework unstable material against present slope as new slope <br />is established. <br />5. Construct bench using underground development waste. The <br />requirements of Rule 4.09 will be followed in the disposal of this <br />material, approximately 80,000 cubic yards. Lifts will be 2' or less <br />thick and will be compacted to 90% of the maximum dry density. The <br />source of the material will be the Blue Ribbon Mine, the West Elk <br />Coal Company mine, and possibly other local mines with material to <br />be disposed of. Chemical and physical information for material from <br />each mine will be submitted to the Division prior to use. <br />6. Establish drains in the bench during construction to inter- <br />cept ground water. Detailed design of the bench drain system will be <br />submitted as parC of Appendix 1-B. <br />-2- <br />