Laserfiche WebLink
Exhibit A LEGAL DESCRIPTION <br />This information is unchanged. <br />Exhibit B -INDEX MAP <br />This information is unchanged. <br />Exhibit C -PRE MINING MAP <br />This information is unchanged. <br />Exhibit C-1 - MINING PLAN MAP <br />Minor revision showing the change of the start of mining from <br />Sharkey's Lake to Longhorn Lake and extended stockpile area in <br />Bluff Lake area. Also shown is the location of the Slurry wall <br />around both lakes covered by this Technical Revision. <br />Exhibit D <br />MINING PLAN <br />Unless specifically discussed below the methods described <br />and approved in the original permit applications, mining and <br />reclamation plans will remain unchanged. The current bond is <br />$110,500 and a new reclamation cost estimate is presented in <br />Exhibit L on page 13 of this application. The following changes <br />to the mining plan are numbered sequentially to give some order <br />to this amendment. <br />AMENDMENT 1 - Mining method chance <br />In this proposed revision we want to change the mining <br />method from wet to dry mining. Currently the approved plan calls <br />for mining the site as a wet operation using a dredge. <br />Dewatering is permitted on a limited basis to allow installation <br />of the dredge in each lake area. We have found that it will be <br />far more practical to mine the area as a dry operation. To avoid <br />impacting surrounding wells we propose installing a bentonite <br />slurry wall around each lake area prior to mining it. Once this <br />is done mining will begin, with some of the material being moved <br />to the processing plant and some will be stockpiled in the Bluff <br />Lake area. The topsoil will be stored on the north end of Bluff <br />Lake for use in reclamation. We expect to use 85.00 acres ± of <br />the Bluff Lake area for these temporary stockpiles. <br />Under the current plan the lake banks have a 3:1 sloping <br />rate from 5 foot above to 10 feet below and a 2:1 on all other <br />slopes. Because of the proposed end use change we will mine the <br />lake slopes at a uniform 3:1 rate from top to bottom to allow for <br />the changing lake elevations as water is added and removed from <br />the reservoir. <br />At this time the exact design for the slurry wall is not <br />complete. As soon as it is, we will submit it to the Division <br />for review. The first area to be lined will be the Longhorn Lake <br />