Laserfiche WebLink
<br /> <br />-2- <br />9. Will the waste pile pond embankment size have to be increased 5% to <br />allow for settling (Rule 4.05.6(8)(e))? <br />10. Will a cutoff trench, antiseep collars, or seepage blankets be <br />needed on the waste pile pond (Rule 4.05.6(10)(e))? <br />11. What sediment cleaning schedule will be used for the waste pile <br />pond (Rule 4.05.Ei(3)(b))? Removing sediment when it reaches 60% of <br />capacity is generally used. Would the operator agree to installing a <br />simple sediment level marker that would clearly indicate the cleanout <br />level? (A staff marker, stake, or rod with the cleanout level painted on <br />would suffice.) <br />12. What are CWI's plans for the sewage pond that will be covered with <br />the waste pile in later years? <br />13. The function of the use of "half culvert drains" was not clearly <br />stated. Are there specific areas that these culverts are proposed for? <br />14. The application should include an engineer's certification <br />statement on the designs and calculations, as required by Rule <br />2.05.3(4)(a)(i)(A). <br />Backfilling and Grading <br />1. The operator needs to briefly justify the use of terraces on the <br />waste rock piles (Rule 4.14.2(2)). Are they used for access, stability, <br />erosion control, water control or retention, etc? <br />2. The vertical distance between terraces also needs to be justified <br />(Rule 43.14.2(2)(b)). If used for erosion control, terrace spacing <br />should be close enough to adequately control erosion, but not too close <br />so as to make the pile configuration artificial and incompatible with the <br />post-mining land use. The use of a soil loss equation that considers <br />terraces should be used to determine the terrace spacing. <br />3. The width of the individual terrace bench is not to exceed 20 feet <br />unless justified for stability reasons, erosion control, or roads <br />included in the approved post-mining land use plan (Rule 4.14.2(2)(a)). <br />4. What sort of barriers will be used at reclamation to prohibit <br />travel (authorized or unauthorized - U.R.V.) on the waste pile terraces? <br />Since the pile is considered permanent (i.e., forever), the Division <br />would like to discourage any disturbances in the future that miyht <br />initiate an erosion condition that would evantually expose the pile (Rule <br />4.14.2(2)(f)). <br />