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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 Road to 6MN Mine Water Storage Reservoir
<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. The light -use road is designed per the requirements of Rule 4.03.3, Light -Use Roads, will be approximately
<br />20 feet wide, with an overall grade of 0.7 percent, and is designed with a 6 -inch compacted road -base base course,
<br />and 3 -inch gravel surfacing. The location of the road, and road configuration and cross-section, are shown on the
<br />design drawings included in Exhibit 490. The light -use road will be maintained on a periodic basis to assure its
<br />suitability for use and effective erosion control. Surfacing of the road will be adequate for the general use of the
<br />road, and will be compatible with winter and spring, snow removal requirements. At such time as the 6MN
<br />Reservoir is no longer needed, the light -use road will be removed and the associated disturbance area 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 Lieht-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, 9 -East Utility Borehole Road, and SWMD Thickener Underflow Borehole Road. All of these roads are
<br />shown on Map 24A and have been designed and 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 />TR16-86 2.05-74.2 09/02/16
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