2020-03-24_PERMIT FILE - C1981019A (2)

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RULE 2 PERMITS 2.05.3 (6) Overburden The complete description of the removal, handling and storage of all overburden material within the permit area is described under the Production, Methods and Equipment Section found at the beginning of Section 2.05.3. The spoil handling procedures and spoil monitoring plan parameters for the operation can be found on Section 2.05.3 of Volume 1. The mining sequence for the planned operation is shown on the Mine Plan Map (Map 23A). Cross sections showing the mining operation during the "steady-state" operation are found on the Mining Range Diagram (Map 24B). For the spoil disposal locations and volumes for both the East and West Taylor valley fills and the temporary overburden stockpile, please refer to Map 35A. The cross-sections that are associated with the design of the valley fills and the temporary stockpile can be found on Map 40A. Permanent Valley fill construction and design criteria is described in detail in Section 4.09. A temporary overburden stockpile will be built above the East Taylor valley fill. The spoil suitability and special handling procedures are described in detail in section 2.05.3(1). The initial development of the stockpile began in 2008 and completed in 2013. The temporary overburden stockpilewas constructed in 50 foot lifts by use of trucks, dozers and loaders. The side slope of the temporary overburden stockpile are generally at al .3H:1 Vslope and will be maintained during active times of operation. Maintenance techniques consist of blading of roads and ramps, along with the use of dust control during active times of operation. Sediment control will be implemented to ensure adequate containment of potential runoff throughout the life of the operation. Following the completion of mining, this temporary overburden stockpile will be removed and placed back into the open pit. Blasting All blasting within the South Taylor area will be conducted in accordance with the blasting parameter described in Volume 1, Section 2.05_ Colowyo will keep a record of each individual blast by utilizing report formats shown in Volume 1, Figure 2 - Blasting Report (coal and overburden), and Volume 1, Figure 3 — Colowyo Chargeweig_ht Sheet (overburden only). Pre -Blasting Survey In accordance with Rule 4.08.2, written notification was provided to all residents and/or owner of dwellings or other structures that are located within one-half mile of the permit amendment area. Copies of the letters are included Exhibit 14, Item 6. These residents/ owners include: Colorado Department of Transportation Highway 13 Region 3, Section 6 270 Ranney Street Craig, Colorado 81625 Stevens Residences 6647 & 7072 MCR 51 Meeker, Colorado 81641 White River Electric Association P.O. Box 958 South Taylor/Lower Wilson — Rule 2, Page 74 Revision Date: 4/7/17 Revision No.: RN -07