2012-11-07_REVISION - M1995030 - Laserfiche WebLink

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ENVIRONMENT, INC. PAGE 2 NOVEMBER 6, 201 2 page 9 to remove the text about an overhang being created during mining and added the explanation outlined in this section. 4. The applicant has stated the mining line will be set 75 ft inside the 25 ft mining setback for a total offset of 100 ft from the permit boundary. If the gravel deposit is mined to a depth of 60 ft and sloughing will occur resulting in an angle of repose 2.5H:1 V then there is the potential the top bank of the mine face could extend 150 ft from the mining line. Please clarify how the proposed offset of 75 ft will allow the Operator to maintain the 25 ft setback from the permit boundary. As the dredge works along the mine face the material is so sandy that it sloughs off to the natural angle of repose and the dredge works along the mine floor removing the loosened material. We proposed using the 75 -foot offset in case it was necessary to cut /fill the final slopes to the final 3:1. Seventy -five (75) feet is much more then what would be needed to cut /fill grade from 2.5:1 to 3:1 it will give the operator room and time to investigate how much cut /fill sloping will be needed as the mine perimeter is reached. The face could then be worked through the 75 -foot offset until the grading line can be established to leave the 25'setback. 5. The Mining Plan states that at any given time no more than 5 acres will need to be revegetated. The Reclamation Plan states that the plant site will be resoiled and revegetated if it does not remain following the completion of reclamation. Until such time as the Operator receives approval to locate an asphalt/concrete batch plant on the site the total area requiring revegetation must include the 7.22 acre plant site. Please revise Page 9 of the application accordingly. The intent was not to seed the plant site area when this section was written. This area was technically pre -law area, as noted on page 5, prior to being disturbed that it had no topsoil covering it. No topsoil /growth medium was salvaged or stockpiled on the site by the original miners. While we committed to resoiling the site if not used for industrial /commercial purposes it may not be possible to do that due to the lack of topsoil availability. Resoiling will not be done until adequate growth medium has been salvaged from stripped areas. If mining ended before this then the area would be reclaimed without growth medium replacement as allowed by the law. I have added text to pages 10, 14 & 15 so it is consistent with this information. 6. The applicant has identified rangeland as the post- mining land use. In addition the applicant has stated an asphalf/concrete batch plant may be located on the site and may remain after reclama- tion is complete. In order for the asphalt/concrete batch plant to remain on site the approved post - mining land use must include industrial /commercial. The applicant may designate industrial /commercial as a post- mining land use during the review of this application. Otherwise an Amendment would need to be filed and approved to include the industrial /commercial post- mining land use at a later date. Please respond. The application form only allows a single choice for the final land use. We concur with your suggestion to add the indust- rial /commercial post mining land use designation to the 7.22 acre Plant Site Area. We understand that until the Division is provided proof that we have Local Government Approval for this final land use it must be revegetated. 7. The applicant has stated that explosives will be used during the mining operation. In accordance with Rule 6.4.4(i) the applicant must demonstrate through appropriate blasting vibration geotechni-