Laserfiche WebLink
The electrical power distribution upgrade consists of repair and upgrading of the <br />transmission lines, substations and distribution system. Repair and upgrade of the <br />existing 44kV transmission line from San Isabel Electric Association's Tercio <br />Substation to New Elk Mine Substation. The transmission line will be repaired and <br />upgraded to 69kV. The ownership of this transmission line will remain with San <br />Isabel Electric Association. No power po le s will e a ed, but the existing terminal <br />pole will be removed and relocated. The electrical utilities corridor is included on <br />Map 11 Sheet 2 East Portal Utilities and Ponds. <br />The existing New Elk Coal Company New Elk Mine Sub station will be upgraded to <br />30 MVA at 69kV. All substation upgra es w cur m ee ex' xisung subst <br />enclosure (fence). A new substation control building will be added the substation <br />from which all underground and surface electrical distribution circuits will be fed. <br />The substation is owned and operated by New Elk Coal Company. <br />The underground and surface electrical distribution system will be upgraded to <br />12.47kV. All surface and underground electrical distribution circuits will be fed <br />from the substation control building. A new buried, concrete - encased duct bank will <br />be installed from the substation to the mine portal area to feed the underground mine, <br />surface conveyors, and crusher building. Typical duct bank construction is shown in <br />Figure 2b. <br />he coal Rrocessing plant and a or system will be fed by means of an <br />• existing; overhea transmission line This line was originally energized at 44kV and <br />owned by San Isabel Electric Association. Ownership will be transferred to New E lk <br />Coal- Comaa y and the line charged at 12.47kV The ventilation fan and surface <br />buildings will be fed by means of existing 12.47kV overhead distribution lines. The <br />existing 12.47kV overhead distribution lines are currently owned by San Isabel <br />Electric Association, but ownership of all lines on New Elk Coal Company property <br />will be transferred to new Elk Coal Company for the permanent power distribution <br />system. The 12.47kV overhead power lines for the permanent electrical distribution <br />system will be isolated from the San Isabel Electric Association system off New Elk <br />Coal Company property, but remain capable of quick reconnection to supply <br />emergency power if needed. A temporary substation will be located adjacent to the <br />existing substation while work on upgrading the substation is underway. <br />• <br />TR -54 Page 2.05 -5c Revised 11/01/10 <br />