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5. Light-Use Roads to Powerline Substation and Subsidence Monitoring Site
<br /> A light-use road and a permanent road will be used to access the substation. The light-use road will run 4,800 feet
<br /> to the substation and will follow the existing "fence" road. The light-use road will be designed per the
<br /> requirements of Rule 4.03.3, Light-Use Roads. The light-use road will be sufficiently maintained in order to assure
<br /> erosion control. Surfacing of the road will be adequate for the general use of the road, and will be compatible with
<br /> winter and spring, snow removal requirements. Access to the light-use road and substation will also require the
<br /> utilization of a permanent road approved by the CMLRD on February 3, 1988 (Technical Revision TR87-12;
<br /> Permit C-81-071). This permanent road runs 12,000 feet from Country Road#27 and is maintained under CYCC's
<br /> Permit C-81-071. The roads will be maintained by TCC. Upon substation removal, the light-use road will remain
<br /> as part of the approved postmining use of ranch management. The light-use and permanent road are shown on Map
<br /> 39, Substation and Powerline Location.
<br /> A light-use road will be used to access a subsidence borehole meter at Mine 2 (MR89-37). The road will be
<br /> reclaimed on completion of the subsidence borehole metering.
<br /> 6. Light-Use Roads to 6MN Mine Water Storage Reservoir and Passive Treatment System
<br /> A light-use road will access the 6MN Mine Water Storage Reservoir, for inspection and maintenance purposes.
<br /> The light-use road will run approximately 130 feet from the existing 6MN Ventilation Shaft Installation access
<br /> road. A second road will extend from the Shaft Pad approximately 4,500 feet to the north and west, generally
<br /> following the existing ranch road and then turning west to parallel the Passive Treatment System. The light-use
<br /> roads are designed per the requirements of Rule 4.03.3, Light-Use Roads, will be approximately 20 to 25 feet wide,
<br /> with relatively flat grades following the natural terrain, and are designed with a 6-inch compacted road-base base
<br /> course, and 3-inch gravel surfacing. The location of the roads, and road configuration and cross-section, are shown
<br /> on the design drawings included in Exhibits 490 and 49EE, respectively. These light-use roads will be maintained
<br /> on a periodic basis to assure suitability for use and effective erosion control. Surfacing will be adequate for the
<br /> general use of the road, and will be compatible with winter and spring snow removal requirements. At such time as
<br /> the 6MN Reservoir and/or Passive Treatment System are no longer needed, the associated light-use roads will be
<br /> removed (except for those segments that are part of an existing ranch road) and the disturbance area(s)reclaimed.
<br /> 7. Light-Use Road to 18-Left Ventilation Shaft Installation
<br /> A light-use road will access the 18-Left Ventilation Shaft Installation, for inspection and maintenance purposes.
<br /> The light-use road will run approximately 420 feet from Routt County Road 27. The light-use road is designed per
<br /> the requirements of Rule 4.03.3, Light-Use Roads, will be approximately 24 feet wide, with an overall grade of 0.0
<br /> percent, and is designed with a 18-inch compacted pit run base course, and 6-inch road base and/or gravel
<br /> surfacing. The location of the road, and road configuration and cross-section, are shown on the design drawings
<br /> included in Exhibit 49R. The light-use road will be maintained on a periodic basis to assure its suitability for use
<br /> and effective erosion control. Surfacing of the road will be adequate for the general use of the road, and will be
<br /> compatible with winter and spring, snow removal requirements. At such time as the 18-Left Ventilation Shaft
<br /> Installation is no longer needed,the light-use road will be removed and the associated disturbance area reclaimed.
<br /> 8. Other Light-Use Roads
<br /> In addition to the above light-use roads, a number of other roads of this classification are located around the
<br /> property. The other roads include the following: Low Quality Coal Stockpile Road, West Gate Road, Fish Creek
<br /> Borehole Road, Escape Shaft/Borehole Site Road, EMD Dewatering Borehole Road, Lieske Substation Road, MET
<br /> Station Road, 6-Right Thickener Underflow Borehole Road, 5-Right Borehole Road, 13-Left Outby Borehole
<br /> Road, and 9-East Utility Borehole Road. All of these roads are shown on Map 24A and have been designed and
<br /> constructed in conformance with Rule 4.03.3.
<br /> General
<br /> No bridges are planned with this permit revision application. All culverts with an end area of less than 35 square
<br /> feet will be designed to pass, at a minimum, the 10-year, 24-hour event. Should a culvert with an end area greater
<br /> than 35 square feet be needed, it will be designed to safety pass the 20-year, 24-hour event. The culverts have also
<br /> TR16-84 2.05-74.2 08/20/18
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