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Pond 016 Slide Remediation Plan <br />Page 6 <br />Response: Section B-B' has been revised. <br />20. A comparison of Section B-B' with the plan view on Sheet I reveals that the centerline of <br />Road J/K is located at -Sta. 2+30 on this section. The Proposed Surface on this section <br />shows a continuous surface 60' in length at >8% slope (Sta. 2+20 to 2+80). The location <br />of Road J/K is not identified on this slope. Please modify this section to accurately depict <br />the proposed configuration (template) of Road J/K, including elevation above the graded <br />surface, roadside ditches, etc. <br />Response: Section B-B' has been revised as requested. <br />21. On Section C-C', comparison with the plan view on Sheet I reveals that the centerline of <br />Road J/K is located at -3+20 on this section. Please modify this section in accordance <br />with the requirements of paragraph c., above. <br />Response: Section C-C' has been revised as requested. <br />22. On Section C-C', the existing Pond 016A impounding structure is centered at Sta. 1+90. <br />As shown, the Proposed Surface will result in fill above the elevation of the current <br />structure and on the downslope of the structure. This configuration appears to contradict <br />the text description provided in the Pond 016 Area Stabilization Plan Summary (Page 3 of <br />the application), which states, under Pond 016A Removal, "a portion of the existing <br />embankment will be lowered/removed to drain the current pond and then be reconfigured <br />to fit the relocated Channel PM-2 design. " Please clarify the text and/or map and cross <br />section to provide consistency within the application. <br />Response: Section C-C' is correctly portraying the configuration at that location. Section E-E' <br />has been included to clarify the confusion. <br />23. On Section D-D', please depict the location of Road J/K, as the Division also requests for <br />Sections B-B' and C-C', above. <br />Response: Section D-D' has been revised as requested. <br />24. Comparison of Section D-D' with the plan view on Sheet 1 indicates that Channel PM-2 <br />will cross this section at - Sta. 1+85. Please modify this section to accurately depict the <br />proposed location and configuration of channel PM-2. <br />Response: Section D-D' has been revised as requested. <br />25. The existing Pond 016 design and as-built report indicate that the riser height of the drop <br />inlet spillway is 5, with a spillway invert elevation of 7,462.00'. The new design retains <br />Seneca Coal Company • P.O. Box 670 • Hayden, Colorado 81639 <br />Telephone (970) 276-5219 • FAX (970) 276-5222