2019-08-21_REVISION - M1976056 (6)

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McAtee Construction Company Page 2 Riverside Pit - M-1976-056 August 20, 2019 Office of Archaeology & Historic Preservation Thank you for the information and if human remains are found when mining is taking place the Logan County Sheriff will be contacted. U.S. Army Corps of Engineers We wish to thank Mr. Laux for taking the time to review our permit application, provides contact information and make suggestions. The items he mention have been done in the past and are being updated as needed. In particular water exposed by this operation is currently covered by a Well Permit (#66811) and an augmentation plan (2017CW3062). It will be updated prior to exposing more water surface area then currently allowed. We have a permit to discharge stormwater and nothing is released into state waters. This is an existing mine in a heavy industrial area that was used as an old cattle feedlot and the existing operation can have no more impacts to wildlife then what have existed for 50 plus years. The Colorado Parks and Wildlife was contacted prior to mining beginning in 1976 and no issues were noted at that time. The impact to the flood zone is minimal as the changes will not increase the flood elevations. No dredge or fill will be placed in water of the US nor will wetlands be impacted as none exist on the site that have not been built during reclamation. 6.4 Specific Exhibit Requirements - Regular 112 Operations The following items must be addressed by the Applicant in order to satisfy the requirements of C.R.S. 34-32.5-101 et seq. and the Mineral Rules and Regulations of the Mined Land Reclamation Board: 6.4.3 Exhibit C - Pre-mining and Mining Plan Maps of Affected Lands 4. Please update the Exhibit C maps to indicate the 40 feet offset from each side of the centerline of the Xcel Energy owned overhead powerlines. Attached are copies of the revised Map C - Pre-Mining and Map C-1 - Mining Plan maps showing the offsets along the power lines. 5. Please update the Exhibit C maps to indicate the 200 feet offset from the buried powerline adjacent to the east permit line on the West Area until a structure agreement is signed by the utility owner. The plan is to mine within 200 feet of any structure either under an agreement with the owners (in this case Xcel Energy) or thru proof that the mining and final slope setback distances have factors of safety greater then 1.5 thru the Geotechnical Analysis (GA) presented. The GA is used in place of, the structural agreement if it is not returned. FYI, this power line was buried after the permit was amended in August of 2000 and McAtee Construction Company asked to have it buried, Xcel was fully aware it was going to be mined next to. This was not added to the map.