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/__~~ • <br />• <br />Mr. Larry Reschke -Z- October 11, 1984 <br />D) On page 128b, it is stated that the "rip-rap will be well graded with <br />the majority of the material over 4.85 inches in diameter." The <br />definition of d50 is "rock size for which 50 percent of the rip rap by <br />weight is smaller". The permittee's statement should be modified to <br />reflect accepted rip-rap sizing methods. <br />If you have any questions, please contact me. <br />SincerRly <br />,..- <br />~.- ~ ti <br />Dan Mathews <br />Reclamation Saecialist <br />DM/mad <br />Doc. No. 4682D <br />