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file ws4\twinper <br />2. MINE FACILITIES (See 2.06.10 for Twin Pines Coal Sales) <br />• Facilities included in the mine plan are as follows: <br />A. A shop office building and storage trailers <br />B. An electrical substation; <br />C. A stacking conveyer (36"r.100'); <br />D. Water tank and pump house. <br />The approximate location of the mine facilities are shown on <br />the "Mine Site Plan" Drawing No. TP-3. <br />3. ROADS (See Section 2.66.10 for Twin Pines Coa] Sales) <br />A. Access to the mine site: Access to the mine site from <br />County Road No. 77 is by an e>:i ting improved road up Lewis <br />Gulch. The road was constructed to Fremont County Standards <br />and is maintained by the County. The Access road is 3464 <br />feet long with an average gradient of 3.6%. <br />8. Road truck loading area to mine site: This road <br />is for main access to the mine. An existing road was <br />upgraded for the facility. A road side drainage ditch has <br />been provided to direct the flow from above and off of the <br />roadway to a 24 inch corrugated metal pipe at the base of <br />the grade, which flows into the lower sedimentation pond. <br />Design velocities in the road side ditch require rip-rap <br />. protection and/or a series of drop structures to control <br />erosion and dissipate velocities. Typical road sections and <br />drainage calculations are shown on the "Mine Site Plan". <br />C. Road to North Spoil Area: This short section of road is <br />constructed on an existing road bed and provides access to <br />the North Spoil Area for a front end loader and/or truc4:. <br />The spoil generated by the mine does not require continuous <br />travel of the road. The road is constructed on an average <br />gradient. of 0.6% with varying road width. The road is <br />drained by a roadside ditch which directs flow to the Bench <br />Sedimentation Pond. Any flow within the roadway is contained <br />6y a berm on the out slope. The road is designed to carry <br />run-off from the slopes above and the North Spoil Area. Cut <br />and fill slopes for the road have been reclaimed in <br />accordance with the reclamation plan. Typical Road sections <br />and drainage calculations are shown on the "Mine Site Plan". <br />D. The Upper Bench: The upper bench was constructed Co <br />provide protection for the mai r. mine bench from debris <br />sloughing from the existing highwall, a location for the <br />mine substation, and limited access to the mine substation <br />and water tank. The bench is sub.lect sloughing of material <br />from the highwall above and requires periodic maintenance to <br />permit travel. This bench directs run-off from the slopes <br />and highiwall above, directing the flow to the mine access <br />• road and then to the lower sedimentation pond. The bench is <br />provided with a berm to contain the flow within the roado~ay. <br />REVISED 6/19/93 <br />'T 2 <br />