2023-02-02_PERMIT FILE - M2022013 (6)

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Page 14 6.4.7 EXHIBIT G - Water Information As stated in Exhibit D, 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 20 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". 7Included as an addendum is the Headwaters Corporation report (July 2019) for what is generally referred to as the Westervelt project which was a stream and floodplain restoration project downstream and adjacent to the Two Rivers project at the confluence of the South Platte and Big Thomson rivers. As described in Exhibit I-J, approximately 200,000± cu.yd. of material excavated in the execution of this project was stockpiled in a 28f acre area comprising most of the North- East section of the Central Field. The Headwaters report discusses the excavation and placement of this material and expected hydrological impacts. 8A groundwater monitoring plan has been prepared for the Two Rivers project and is attached as an addendum to this Exhibit G. (3) The three components of the project water requirements are water removed for dust control, water removed with the product, and evaporation from exposed ground water. Dust will be controlled using truck sprinklers, and the estimated frequency is one to ten loads per day depending upon field conditions. Dust will be controlled using truck sprinklers, and the estimated frequency varies daily according to seasonal influences of rain, snow, freezing, and temperatures (Refer to Seasonal Temperatures and Precipitation. At 3,000 gallons of truck capacity, the annual demand is 10.6 acre-feet. (Refer to following Chart (days of hot, freezing, rainy and snowy days derived from: https://www.bestplaces.net/weather/county/colorado/weld): Adequacy Item 45:Headwaters addendum explanation s Adequacy Item 46 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