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Hart Environmental <br /> August 17, 2016 <br /> Page 3 of 4 <br /> According to the maps submitted with the application,a significant portion of the site is within the 100 year <br /> flood plain of the South Platte River. The application as submitted does not address how the permittee will <br /> prevent damage to the lined reservoirs from flood events to ensure the long term stability of the site—please <br /> address. Many operators incorporate engineered inlet/outlet structures to lined reservoirs to allow flood flows <br /> to enter and exit the reservoir in a controlled fashion. These structures are intended to prevent damage to the <br /> slurry wall liners and prevent possible head-cutting damage/stream capture due to significant flood events. <br /> EXHIBIT L - Reclamation Costs (Rule 6.4.12): (1) All information necessary to calculate the costs of <br /> reclamation must be submitted and broken down into the various major phases of reclamation. You must <br /> provide sufficient information to calculate the cost of reclamation that would be incurred by the state. <br /> Estimates for all tasks,broken down by task, and including information such as material quantities required, <br /> push distances,equipment utilized,etc. should be provided in this Exhibit. <br /> DRMS will recalculate reclamation costs when all adequacy issues are resolved. Based on information <br /> contained in the application DRMS will need at least the following additional information: <br /> - Acres that will require topsoil reapplication and topsoil depth to be replaced(cubic yards topsoil <br /> required) <br /> - Cubic yards of material required to backfill wetland and upland areas in Stages 1, 3, and 6 to <br /> eliminate exposed groundwater after excavation. Reclamation costs for Stage 2 were recently <br /> calculated for TR02 <br /> - Push/haul distances from material stockpiles used for backfill and topsoil. <br /> - Seed cost per pound and pounds required per acre <br /> Slurry walls will not require bonding if installed and approved by SEO prior to groundwater exposure. Any <br /> groundwater exposed in wetland areas will need to be properly permanently augmented through SEO prior <br /> to release. <br /> EXHIBIT N- Source of Legal Right to Enter(Rule 6.4.14): You must provide the source of your legal <br /> right to enter and initiate a mining operation on the affected land. <br /> Exhibit O, as well as the included warranty deed for the Morton Property shows Morton Lakes LLC as the <br /> owner of a part of the permitted property and associated sand and gravel. However the permittee is listed as <br /> Ready Mixed Concrete. The permittee of record (RMCC) will need to demonstrate a valid Legal Right to <br /> Enter from the Property Owner(Morton Lakes LLC). <br /> EXHIBIT S - Permanent Man-Made Structures (Rule 6.4.19): Please note that roadways and above- <br /> ground or underground utilities (if present) within 200 feet of the proposed affected area are considered <br /> permanent man-made structures. In accordance with Rule 6.4.19, when mining operations will adversely <br /> affect the stability of any significant,valuable and permanent man-made structure located within 200 feet of <br /> the affected area,the applicant may either: <br /> a.)Provide a notarized agreement between the applicant and the person(s)having an interest in the structure, <br /> that the applicant is to provide compensation for any damage to the structure; or <br /> b.) Where such an agreement cannot be reached, the applicant shall provide an appropriate engineering <br /> evaluation that demonstrates that such structure shall not be damaged by activities occurring at the mining <br /> operation. <br />