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Doug White, Western Fuels <br />C- 2010 -089 TR -01 PAR <br />Mar. 11, 2013 <br />Page 6 of 9 <br />e. The SEDAD designs indicate that the riser height is 8'. Photographs of the riser <br />taken by the Division on December 12, 2012 (below) would indicate that the riser <br />is less than 8' high. Please revise the design based on the actual height of the <br />riser. <br />Division <br />Decerr <br />height <br />nhntnaranhc takan <br />Engineering / Geotechnical <br />The approved design for Pond NHN -001, prepared by Arcadis U.S., Inc., is provided in <br />Appendix 2.05.3(4) -1 of the permit. DRMS requirements for pond embankment construction are <br />prescribed in Section 4.05.9 of the Coal Regulations. A list of the applicable sections, with <br />comments, is provided below. [The NHN -001 embankment height is less than 10 feet from the <br />bottom of the channel to the bottom of the spillway, and this pond does not meet the USDA SCS <br />TR60 criteria for a Class B or C impoundment; therefore, many of the requirements of 4.05.9 are <br />not applicable.] <br />