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RULE 4 PERFORMANCE STANDARDS <br />repair the access road through the reclamation and reseeded it with the approved seed mixture soon <br />after extinguishing the fire. <br />Tri-State Generation and Transmission Assoication, Inc. (Tri-State), owns and operates a 345 kV <br />power line which is located within the permit boundary and is shown on Map 22. Tri-State is <br />required to maintain proper phase to ground clearences under all their power lines, and will be <br />conducting ground disturbances activites within their 150' right-of-way, within the permit <br />boundary, in two approximate locations as shown on Figure 4.12-3. The final loctions will be <br />determined by Tri-State. These ground disturbing activites are not associated with the Colowyo <br />Mine and will not be required to be permitted and bonded for in accordance with Rule 3.02.1(2). <br />In February of 2016, the Colowyo Mine site experienced a very high wind event which snapped a <br />power pole off at the base and left the power pole dangling from the line. Colowyo constructed <br />an emergency road into the pole location (0.4 acres of disturbance) to access the location, stabilize <br />the line, and replaced the broken pole. Topsoil was windrowed with a dozer down gradient of the <br />road footprint to minimimze surface water flow from the area of disturbance to native areas. Once <br />ground conditions allow access, the entire road footprint will have the topsoil re -spread on the <br />area, and it will be seeded in accordance with the approved reclamation seed mixture. Please see <br />Figure 4.12-4 for a location of the emergency road that was constructed to repair the power pole. <br />In 2016, the Inactive Mine and Reclamation Program (IMR) began a drilling program to define <br />the burn limits to abate an underground mine fire at the abandoned underground workings at the <br />Axial Mine. The Axial Mine workings are shown on Map 22 and are labeled as the Red Wing <br />Mine. The Axial Mine and Red Wing Mine shared common workings. The drilling project will <br />create ground disturbance within the permit boundary to support the drilling program. These <br />disturbances may include but are not limited to temporary roads, drill pads, and mud pits. The <br />final locations to be disturbed will be determined by IMR. These ground disturbing activities are <br />not associated with the Colowyo's mining activities, and will not be required to be permitted nor <br />bonded for in accordance with Rule 3.02.1(2). <br />In 2016, approximately 4 acres within Colowyo's permit boundary was affected by the moderate <br />intensity wild land fire. The location of the fire is shown on Figure 4.12-5. The area that was <br />burned is mostly comprised of Gambel's Oakbrush and low density sagebrush. Additional surface <br />disturbance within the permit boundary of approximately 1.4 acres was created to cut in a fire line <br />to control and fight the fire. The relatively low intensity nature of the fire does not appear to <br />warrant or require supplemental seeding; however, the area impacted by the fire line will be <br />smoothed over and seeded with the approved reclamation seed mix. <br />In the fall of 2016 and spring of 2017 White River Electric Assoication (WREA) installed and <br />removed powerlines located within the Colowyo permit boundary. The powerlines that were <br />serviced are located adjacent the Gossard Loadout facility (an overhead line will be buried) and <br />Jubb Creek (new overhead line) north towards Moffat County Road 32. These powerlines that <br />were installed and removed are owned and operated by WREA. The final locations that will be <br />serviced and potentially create ground disturbance will be determined by WREA. These ground <br />disturbing activities are not associated with the Colowyo's mining activities, and will not be <br />required to be permitted nor bonded for in accordance with Rule 3.02.1(2). <br />Rule 4 Performance Standards 4-39 Revision Date: 5/25/18 <br />Revision No.: RN -07 <br />