2024-11-12_PERMIT FILE - M2024057

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ERC 3. Marketable Product:The end product is the frac sand,which will consist of particles sized between #40 and#140.This specific range is typically that used in hydraulic fracturing. 4. Conveyor System: The marketable frac sand will then be output onto a conveyor belt, which transports it to a load-out stockpile for storage. This area is specifically designed for temporary storage before the sand is loaded onto transport trucks. 5. Water and Fines Discharge:Water and any materials finer than the#140 sieve will be directed to settling ponds.This will help liberate water and allows for the settling of fine particles. 5.0 PROJECT TIMEFRAME The current plan involves removing the maximum amount of material from the reservoir while ensuring proper drainage across the basin and into the low-level outlet conduits, allowing the reservoir to be emptied if necessary. At the current dredging production rate,the sediment removal process is expected to take over 20 years. However, if any economic, business, or permitting changes occur that render the project no longer feasible, operations may be suspended at any time. Plans have been developed assuming the operation is viable for complete removal of materials from the reservoir but in a way that earlier termination is not detrimental. The plans have been organized to illustrate existing conditions, operations in 2025, the end of year five (2029), and the ultimate configuration. Below is a summary of work activities in these time frames. 2025 OPERATIONS • Dredging will occur from March through November with a production rate of 1.2 MCY per year. • Dredged materials will be directed to the hydro-cyclone on the north side of the reservoir where it currently resides. • Solids from the cyclone will be stockpiled in the northern stockpiles(N1, N2,and N3). The current plan is to maximum filling within N1 before filling in another stockpile. • The stockpile configuration shown on Drawing C-6 can accommodate the total volume of material expected to be dredged in 2025. • The hydro-cyclone may be moved to accommodate the operation. • If Pond 2 has not been completely emptied of dewatered dredge materials, the solids will be hauled and placed into the West Stockpile or Stockpile 1. • Materials from the In-Res Settling Ponds will be transferred to the West Stockpile or Stockpile 1 throughout the year, as equipment and manpower availability permits. • Materials will be sold to customers if the opportunity arises. • Third party trucks will enter and exit from the main mine entrance. • Planning and designing of the sand plant will continue. 14