Laserfiche WebLink
b. Additionally, Section 6.3.3(c) of the information provided within this plan states <br />that "the thickness of the overburden to the deposit to be mined will vary from <br />one foot to ten feet." <br />c. Finally, Section 6.3.3(d) states that "the thickness of the deposit to be mined will <br />vary from six to thirteen feet deep." <br />d. This totals a minimum excavated depth of eight feet (with only one foot of topsoil <br />and overburden and six feet of commodity) and a maximum excavated depth of <br />twenty-four feet. <br />e. How will ground water interception be prevented when the estimated depth to <br />water is between ten and eighteen feet (as stated in the report provided to the <br />Division with this application package, and compiled by Larry L. Harkins, P.E. on <br />June 28, 2005), and corroborated by the May 13, 2004 Well Construction and <br />Test Report (under the section noted as "Remarks") that water was encountered at <br />"ten feet"? <br />5. Please provide the source of the water to be used for dust suppression and any on-site <br />processing. <br />6. Please designate if disturbances such as benches or impoundments will occur, and if so <br />specify their dimensions. <br />7. Please provide volumetric dimensions for the proposed detention pond. <br />8. Please describe how positive drainage offsite will be preserved, as this site is to be <br />reclaimed to rangeland and is not designated as water storage. It is stated in Exhibit E <br />(Section 6.3.3(1)) that no storm water will be retained on the property. However, the <br />proposed post-mine topography illustrates abasin-type configuration where water maybe <br />held onsite. Please reconcile this discrepancy. <br />Rule 6.3.4 Exhibit D- Reclamation Plan <br />9. Please provide anticipated quantity {cubic yards) of topsoil on-site at all times. <br />10. Please provide anticipated quantity (cubic yards) of construction stockpile material on- <br />site at all times. <br />11. The Division has noted less favorable reclamation success on slopes steeper than 3h:ly. <br />Please commit to grading and reclaiming slopes at this site to 3h:ly or less steep to <br />increase the likelihood of reclamation success. <br />12. Please provide DRMS with a copy of the Storm Water Management Plan (SWMP) once <br />submitted to the Water Quality Control Division. Please make any changes necessary to <br />maps to specify the location of ditches and sediment or storm water control structures so <br />the Division can calculate the cost to reclaim such structures. <br />13. Please describe the practices, structures, and/or measures to be implemented to control <br />sedimentation and erosion from the mine site into the nearby Hardscrabble Creek <br />drainage. <br />