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<br />Engineer's Office (OSE). The applicant also states that the operator will obtain an approved <br />augmentation plan through Colorado Water Court after mining is completed. The Division <br />requests that the applicant commit to no exposure of groundwater at the site until an OSE <br />approved temporary subsitute supply plan for mining purposes is obtained. Also, the Division <br />will require demonstration of a court approved augmentation plan for the site prior to financial <br />warranty release. In the event that all reclamation tasks for the Riverview Resource have been <br />completed to the Division's satifaction and a court approved augmentation plan is not available, <br />the Division may require a financial warranty adequate to complete an alternative reclamation <br />plan. This would consist of importing clean, inert backfill material to backfill the excavations to <br />an elevation that is at least two (2) feet above the groundwater surface; importing topsoil to cover <br />all backfilled areas to a depth of a[ least six (6) inches; and reseeding all backfilled and graded <br />areas. <br />10. The applicant states on page 6 that reclamation of the site will consist of ponds as water <br />storage reservoirs. The applicant further states on page l 1 that the project will create seven open <br />pit lakes with approximately 265 acres of exposed surface at reclamation; that six of the seven <br />lakes will be lined; and that the remaining lake will be unlined and hydrologically connected to <br />the alluvial aquifer. Prior to a recommendation of approval, the applicant will need to provide <br />details of the liner construction as well as suitability of the bedrock pit bottom for a water storage <br />reservoir. At a minimum, the applicant will need to provide the following details with respect to <br />liner construction: material to be used, source of the material, thickness of lift to be <br />applied, final liner thickness, specific design permeability that will not be exceeded, number of <br />linear feet of liner to be constructed, and cross sectional design. At a minimum, the applicant <br />will need to provide the following details with respect to suitability of the bedrock for a water <br />storage reservoir: geology of the bedrock, thickness of the bedrock material, degree of fracturing <br />expected, clay content, permeability expected, and hydrologic connection to the alluvial aquifer. <br />