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RULE 4 PERFORMANCE STANDARDS <br /> Vegetated areas are utilized as sediment filters. Haul Road A is under constant routine maintenance to <br /> avoid damage to environmental values. <br /> The construction of both haul road segments A and B was completed in 1977; however, Haul Road A will <br /> be widened in 2018 including and will include an upper and lower ditches for long term stability of the <br /> fill materials (please see Exhibit 7 Item 15). The design for both haul roads had been prepared based on <br /> the anticipated volume of traffic and the weight and speed of vehicles to be used. The Colowyo Coal <br /> haulage fleet used for transport of coal from the primary crusher to the Gossard Loadout consists of <br /> highway trucks,and transport of large mining equipment to and from the Collom Pit. <br /> The haul roads are located on stable terrain to minimize erosion. As shown on the Existing Structures - <br /> North Map (Map 21), the haul road A crosses Taylor Creek, and has been maintained according to the <br /> requirements of 4.03.1(4). The grade and pitch requirements specified in 4.03.1(3), Design and <br /> Construction,are met for both haul roads. <br /> Colowyo will maintain haul roads A and B throughout the life of the mine with repairs including blading, <br /> filling of potholes, and replacement of road surface as necessary. Likewise, watering for dust control will <br /> be implemented as necessary. <br /> Section 2.05.5 discusses the changes to be made to the main haul road, a portion of which will be left in <br /> place after completion of mining to retain access into the area to compliment the post mining land use. <br /> Rule 4 Performance Standards 4-3 Revision Date: 6/15/18 <br /> Revision No.: TR-122 <br />