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Response to DRMS Adequacy Review(2)—Cotter-9 Mine Reclamation Plan Amendment <br /> 7. Pages ESWMP-48 and 49, NOAA Atlas Charts. The August 1, 2013 response is <br /> adequate. <br /> DDP Drawings: <br /> 8. Pages 3-ef-7, now 3 of 10. The August 1, 2013 response is partially adequate. The <br /> proposed sections 20.-A and IOA-IA are not where the DRMS intended analyses to be <br /> performed. Please see Figures I and 11 on page 3 ofAttachmentA for clarification and <br /> revise Sheet 3 accordingly. <br /> The additional channel segments suggested have been relocated, or added, and analyzed <br /> as requested. These can be seen on the drawings included in Attachment 4. Calculations <br /> for flow analysis can be found in Attachment 2. <br /> 9. Sheet 4-ejc-7 now 4 of 10. The August], 2013 response is adequate, but may require <br /> revisions based on the response to Comment 4a above, regarding the throat section. <br /> Revised spillway and low-level outlet details and locations are provided in the revised <br /> drawings included in Attachment 4 of this document. <br /> 10. Sheet Sad of now 6 and 7 of 10. <br /> a. Please provide water surface (W.S.) elevations...The August 1, 2013 response is <br /> adequate. <br /> b. Please provide flow velocities for each section...The August 1, 2013 response is <br /> adequate, but may require revisions based on the response to Comments 3a <br /> through d above. <br /> Given the wide range of possible Manning's "n"values used and the conservative <br /> approach of using worst case conditions in the analysis to determine the need for <br /> armoring or oversizing, we feel the original values and analyses were appropriate. <br /> c. Please revise slopes...The August 1, 2013 response is adequate. <br /> 11. Sheet J-ef-7, now 10 of 10. Cross sections and details: <br /> a. Section 20-2. Moved to Sheet 8 of 10 and increased depth to 12 inches. The <br /> August 1, 2013 response is adequate. <br /> b. Section 30-2. Section 30-2 on Sheet 3 of 10 appears to have moved from the <br /> previous location on Sheet 3 of 7(911212012 submittal) to what was previously <br /> Section 30-3 on Sheet 3 of 7. The one foot design depth does however meet the <br /> 5 <br />