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laterals with rock or matting bottoms, V ditches made with the dozer or motor grader, and <br />subsequent revegetation. <br />Head cutting in channels will be controlled by a number of methods. If the area is at a point that <br />concentrates runoff, the area will be improved to accept this runoff. This would include <br />reshaping the channel and channel bottom, covering with erosion matting, seeding, or rocking. <br />Inlet channel erosion will be controlled down to the average water level of the ponds. Remedial <br />action on pond slopes will extend as far down the slopes as equipment access allows, which at a <br />minimum will be below the level of the principal spillway of each pond. <br />In other areas, depending on the extent of erosion and time of year, the area will be regraded, <br />disked, and seeded as needed. Straw bales, erosion matting, or rock fill may also be used to <br />stabilize the area. <br />5.1 Design Methodology <br />Arcadis report in Appendix 2.05.3(4)-1 includes the methodology used for the initial pond <br />designs. Pond NHN-002 has been redesigned, with all of the details to be found in Appendix <br />2.05.3(4)-8. <br />Special Features <br />6.1 Temporary Relocation for CC Company Second Park Lateral Ditch <br />The Colorado Cooperative Company has operated an irrigation ditch known as the Second Park <br />Lateral Ditch to irrigate lands in the area for many decades. With the mining of the Garvey <br />property, this ditch will need to be diverted. Since the temporary diversion route involves rises <br />and dips, a pipeline must be used. The plans enclosed in this document show the detailed design <br />of the pipeline's temporary route and the permanent relocation. <br />As per the successful experience at NI -12 Mine, it is believed that a high density polyethylene <br />(HDPE) pipeline is the best choice for the temporary and permanent routes. Although expensive, <br />WFC believes that this design will best suit the long term needs of the CC Co. <br />WFC is evaluating two possible diversion routes for the pipeline. One that would begin at the <br />easterly mine permit boundary and the route south along the county road then around the mine <br />area to the west and then north along 2600 Road to tie into the existing ditch as it leaves the mine <br />permit area. The second option would be to begin the pipeline farther east to gain additional <br />elevation drop as the pipeline swings around the mine property. This additional elevation drop is <br />desirous as it could provide sufficient pressure to allow for side roll irrigation without the need <br />for pumping. Installation will be undertaken well in advance of the irrigation season to ensure <br />that the system is fully functional when it is needed. <br />Section 2.05.3(4) Page 6 Sept. 2015 (TR -11) <br />