|
<br />MR24-325 2.05-74.2 03/27/24
<br />5. Light-Use Roads to Powerline Substation and Subsidence Monitoring Site
<br />
<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 to
<br />the substation and will follow the existing “fence” road. The light-use road will be designed per the requirements of
<br />Rule 4.03.3, Light-Use Roads. The light-use road will be sufficiently maintained in order to assure erosion control.
<br />Surfacing of the road will be adequate for the general use of the road, and will be compatible with winter and spring,
<br />snow removal requirements. Access to the light-use road and substation will also require the utilization of a
<br />permanent road approved by the CMLRD on February 3, 1988 (Technical Revision TR87-12; Permit C-81-071).
<br />This permanent road runs 12,000 feet from Country Road #27 and is maintained under CYCC’s Permit C-81-071.
<br />The roads will be maintained by TCC. Upon substation removal, the light-use road will remain as part of the approved
<br />postmining use of ranch management. The light-use and permanent road are shown on Map 39, Substation and
<br />Powerline Location. A light-use road will be used to access a subsidence borehole meter at Mine 2 (MR89-37). The
<br />road will be reclaimed on completion of the subsidence borehole metering.
<br />
<br />6. Light-Use Roads to 6MN Mine Water Storage Reservoir and Passive Treatment System
<br />
<br />A light-use road will access the 6MN Mine Water Storage Reservoir, for inspection and maintenance purposes. The
<br />light-use road will run approximately 130 feet from the existing 6MN Ventilation Shaft Installation access road. A
<br />second road will extend from the Shaft Pad approximately 2,500 feet, paralleling the northern diversion ditch for the
<br />Passive Treatment System. The light-use roads are designed per the requirements of Rule 4.03.3, Light-Use Roads,
<br />will be approximately 20 to 25 feet wide, with overall grades of 0.7 percent and 1.4 percent, respectively, and are
<br />designed with a 6-inch compacted road-base base course, and 3-inch gravel surfacing. The location of the roads, and
<br />road configuration and cross-section, are shown on the design drawings included in Exhibits 49O and 49EE,
<br />respectively. These light-use roads will be maintained on a periodic basis to assure suitability for use and effective
<br />erosion control. Surfacing will be adequate for the general use of the road, and will be compatible with winter and
<br />spring snow removal requirements. At such time as the 6MN Reservoir and/or Passive Treatment System are no
<br />longer needed, the associated light-use roads will be removed and the disturbance area(s) reclaimed.
<br />
<br />7. Light-Use Road to 18-Left Ventilation Shaft Installation
<br />
<br />A light-use road will access the 18-Left Ventilation Shaft Installation, for inspection and maintenance purposes. The
<br />light-use road will run approximately 420 feet from Routt County Road 27. The light-use road is designed per the
<br />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 surfacing.
<br />The location of the road, and road configuration and cross-section, are shown on the design drawings included in
<br />Exhibit 49R. The light-use road will be maintained on a periodic basis to assure its suitability for use and effective
<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. At such time as the 18-Left Ventilation Shaft Installation is no longer
<br />needed, the light-use road will be removed and the associated disturbance area reclaimed.
<br />
<br />8. Other Light-Use Roads
<br />
<br />In addition to the above light-use roads, a number of other roads of this classification are located around the property.
<br />The other roads include the following: Low Quality Coal Stockpile Road, West Gate Road, Fish Creek Borehole
<br />Road, Escape Shaft/Borehole Site Road, EMD Dewatering Borehole Road, Lieske Substation Road, MET Station
<br />Road, 6-Right Thickener Underflow Borehole Road, 5-Right Borehole Road, 13-Left Outby Borehole Road, 9-East
<br />Utility Borehole Road, 6-East Utility Borehole, WC Mains Utility borehole, the access roads to the SWMD Thickener
<br />Underflow Boreholes, and the roads used to access the 12, and 14 through 17 Thickener Underflow Boreholes. All
<br />of these roads are shown on Map 24A and have been designed and constructed in conformance with Rule 4.03.3.
<br />
<br />General
<br />
<br />No bridges are planned with this permit revision application. All culverts with an end area of less than 35 square feet
<br />will be designed to pass, at a minimum, the 10-year, 24-hour event. Should a culvert with an end area greater than
<br />35 square feet be needed, it will be designed to safety pass the 20-year, 24-hour event. The culverts have also
<br />
|