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INTEROFFICE MEMORANDUM <br />TO: <br />LEIGH SIMMONS <br />FROM: <br />ROB ZUBER <br />SUBJECT: <br />NEW ELK - REVIEW OF TR -70, ADEQUACY ITEM #7 <br />DATE: <br />11/13/2014 <br />Leigh — <br />Per your request, I have reviewed item #7 (pertaining to surface water hydrology) of the TR -70 adequacy review <br />response from New Elk Coal Company (NECC), which we received on October 8, 2014. <br />Overall, I believe that NECC has addressed the main points in item #7. However, there are still two issues that I think <br />they need to address: <br />• NECC needs to update Map 13 to differentiate ditch D -22A from D -22. <br />• The documentation of the SEDCAD run for culvert C32 mentions a performance curve, but this does not <br />appear to be in NECC's submittal. This should be provided to the Division. <br />Let me know if you have any questions or comments. <br />Thanks, <br />Rob <br />