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• ~nks and Gesso, LLC <br />All other mined land within the permitted area (from the oil well located in the south part <br />of Lohmann to the north (Area 8, Exhibit C3), and all of the French property (Area C, <br />Exhibit C-3)) will be reclaimed for water storage and limited development. <br />Upon approval of this application, Everist will bond for twenty percent of the installation <br />costs of the slurry wall and clayNecessary to develop the water storage areas. <br />Regarding the proposed slurry wall, Env rist is submitting the following during the DMG <br />r~ lew~s: <br />a. Design Information <br />b. Technical Specifications <br />c. Construction Quality Control/Quality Assurance (CQA) Procedures <br />d. Sample Construction Report <br />The above-described components of the slurry wall design submittal address each major <br />construction activity involved in the construction of the slurry wall, including: preparation <br />of the site, slurry mixing and hydration, trench excavation, backfill preparation, backfill <br />placement, and site cleanup. <br />As mining is completed in the 41-acre western portion of the site (Area B, see Exhibit C-_ <br />3), the mined area will be lined with compacted clay, in accordance with DMG's Guide to <br />Specification Preparation for Slurry Walls and Clay Liners as a Component of a <br />Colorado Mined Land Reclamation Permit, to ensure stability and minimize infiltration <br />and seepage. The thirteen acres making up the eastern portion of the mined area (Area <br />C, see Exhibit C-3) will utilize slurry walls and take advantage of underlying shale to <br />isolate the constructed water storage reservoir from the surrounding ground water <br />system. Shale substrate will also be used to construct the clay liner in Area B. <br />All grading of affected lands will occur in a timely manner to control erosion and siltation <br />and will be appropriate for rangeland in the southern portion of the site that will be <br />reclaimed for that use. All slopes will be no steeper than a 3H:1 V ratio. <br />Lohmann Sand and Gravel Mine DMG.112 20055 <br />L.G. Everist. Inc March 2001 <br />11 <br />