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Doug White, Western Fuels <br />C- 2010 -089 TR -01 PAR <br />Mar. 11, 2013 <br />Page 7 of 9 <br />4.05.9(2) - A combination of principal (culvert pipe with gated weepholes) and emergency (open <br />channel) spillway systems was provided, as were barriers to control piping along the <br />primary spillway conduit. Item satisfactorily addressed with MR -02 original submittal. <br />4.05.9(7) Requirements for all impoundment embankments <br />(a) Was vegetative /organic material removed from foundation area? Was the <br />foundation base scarified? <br />1. DBMS: Please provide a statement addressing these requirements. <br />WFC: Included with this submittal is a document for inclusion into <br />Appendix 2.0.3(4) -6 that addressed the foundation preparation for Pond <br />NHN -001 including removal of vegetative and organics material, and that <br />the ground was scarified. <br />DBMS: Response accepted <br />(b) Was the fill material free of sod, roots, vegetative matter, and frozen soil? <br />2. DBMS: Please provide a statement addressing this requirement. <br />WFC: Included with this submittal is a document for inclusion into <br />Appendix 2.05.3(4) -6 that addresses the embankment fill material of Pond <br />NHN -001 is free of sod, roots, vegetative matter and frozen soil. <br />DBMS: Response accepted. <br />(c) What layer thickness was used in constructing the embankment? Was 90% <br />compaction deemed sufficient for stability? (The Arcadis design may not have <br />addressed these issues.) <br />3. DBMS: Please provide statements addressing these requirements. <br />WFC: Included with this submittal is a document for inclusion into <br />Appendix 2.05.3(4) -6 addressing that the engineering design for <br />construction of the Pond NHN -001 specified at least 90% Modified <br />Proctor Density, ASTM D -1557, routine compaction standard for <br />embankment construction. Actual constructed lifts were calculated to be <br />an average of 10.7 inches in thickness. <br />DRMS: Response accepted. <br />(d) Is the top elevation V higher than the water elevation in the emergency spillway <br />will be, during an event? Will this be the case once any settlement has occurred? <br />