2023-02-24_PERMIT FILE - M2022013 (8)

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Page 123 6.4.4 EXHIBIT D — Extraction Plan With the exception of the wash pond, whose margins follow existing surface elevations; all plant site processing activities will occur on upland areas outside of the existing 100-year floodplain. These lands occur north and north-west of the existing Evans Ditch as it winds north of the Big Thompson River. Plant activities will require a wash plant and attending wash pond to recycle wash water and receive discharge silts and other reject fines from the washed product. Plant and Wash Pond areas are identified on Exhibit C-2: Extraction Plan Map. The wash pond will function as recycling wash water and receiving basin for reject fines for the intended Plant/Processing activities. Since the basin functions in a closed system, it will not require dewatering. Once the wash pond is established, wet plant operations can be created and join any dry plant activities in progress. Dry Plant operations can be readily established since water is not integral to their operations. Once established, wash pond water will function as a closed system. Settled materials from wash Ponds will be utilized as product or for reclamation as desired. Plant equipment will include, but is not limited to, a crusher, screens, and conveyors, scale house and scale, and attending equipment. Resulting stockpiles of pit run and processed products may be temporarily stockpiled here with processed stockpiles, or combined as needed, until transported to market. 'The conveyor will be set on an elevated structure at varying heights to be situated about the 1 in 100-year flood level. An average height of 7 feet is expected. The conveyor will be supported by legs at intervals of approximately 40 feet with typically 6- x 2- x 2-foot concrete blocks sitting on ground surface used as necessary to anchor the legs. The conveyor will span the river channel and metal (or other appropriate material) pans will be installed under the conveyor structure to prevent spillage into the river. The design will be similar to other Raptor locations where an extended span has been required to cross a county road. Final conveyor specifications are to be determined however belt width is anticipated in the range 24-36". Ultimately, once the wash plant activities near the completion of extracted deposit material, the closed system wash pond will fill with silt and be revegetated in a manner consistent with Exhibit E - Reclamation Plan. Interim clean out of the wash pond will occur until that point, returning the inert materials to the bottom of exhausted pits, or utilizing it in part or in whole as product, or for purposes as substitute soil, soil additive, or as subsoil for reclamation. 'Adequacy Item 24 VARRA COMPANIES, INC. TWO RIVERS SAND GRAVEL AND RESERVOIR PROJECT MARCH 2O22 A REGULAR IMPACT[1121 CONSTRUCTION PERMIT APPLICATION-COLORADO DIVISION OF RECLAMATION MINING&SAFETY OFFICE OF MINED LAND RECLAMATION