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6.4.7 EXHIBIT G -Water Information <br />12. The applicant has provided a groundwater monitoring program with a commitment to <br />monitor groundwater levels upslope of the slurry wall. The applicant has also indicated that they <br />can install a "french drain" system upgradient of the slurry wall approximately one foot above the <br />highest level of the water table level as determined by our monitoring data. In consideration of <br />the number of private well owners near the Stagecoach Pit and the increasing frequency of citizen <br />complaints received by the Division from well owners neaz alluvial sand and gravel operations <br />along the South Platte River corridor, the Division encourages the operator to install a french <br />drain system during constuction of the slurry wall. The Division agrees that such a system will <br />be pro-active and will minimize the potential for adverse effects to any neazby private well <br />owner. Please comment on whether the operator will install a french drain system during the <br />construction of the slurry wall. If yes, an itemized cost for installation of the french drain system <br />will need to be included in the reclamation cost estimate, Exhibit L. <br />6.4.12 EXHIBIT L -Reclamation Costs <br />13. The reclamation cost estimate will need to include an indirect cost for all direct costs <br />including installation of the slurry wall and french drain system, if applicable. However, <br />several options aze available to the operator to reduce the overall reclamation cost. These <br />options include the following: Option 1) Eliminate the cost for slurry wall installation as <br />soon as the slurry wall is completely installed and the operator can demonstrate in writing <br />with correspondence from the Office of the State Engineer (OSE) that the slurry wall meets <br />the performance standazds of the OSE; Option 2) Apply for the regulated construction option <br />with a 20% bonding requirement upon submittal of all required technical information and <br />quality assurance/quality control information. <br />Currently, the Division will include the following direct costs in the reclamation cost <br />estimate for the Stagecoach Pit: <br />$109,256 Backfilling <br />9,582 Respreading Topsoil <br />11,200 Final Grading /Contouring <br />4,950 Grass Seeding, Mulching, Fertilizing <br />515,844 Slurry Wall Installation <br />? French Drain Installation <br />1,250 Equipment Mob/Demob <br />6.4.19 EXHIBIT S -Permanent Man-Made Structures <br />14. The Division acknowledges the operator's commitment to maintain a 200 foot setback from <br />all permanent man-made structures until agreements aze reached with the owner(s) of such <br />structures or a slope stability analysis is submitted to and approved by the Division. There is no <br />