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Mr. Allen Weaver - EFCI -2- March 9, 1992 <br />from smaller-sized particles to larger-sized particles and have a thickness of <br />at least six to nine inches. The thickness of the riprap layer should be 1.25 <br />times the median diameter (D50)• <br />Finally, the revision submittal included a commitment to install elevation <br />markers in Ponds 2 and 3. Please remember to install these to complete <br />abatement of NOV 91-30. <br />The Division still needs a copy of the affidavit of publication. Please <br />return a signed copy of the enclosed revision decision form at your earliest <br />convenience. <br />Notice of our proposed decision will be published as soon as possible. The <br />publication will initiate the ten (10) day public comment period for the <br />Division's decision. Please call if you have any questions. <br />Sincerely, <br />('~-G~.~,,~ ~cJ <br />Catherine W. Begej <br />Reclamation Specialist <br />CWB/bjw <br />Enclosure(s) <br />cc: Mr. Jerry Nettleton <br />ACZ Engineering & Environmental Services <br />1784E <br />