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<br />Brian Munson <br />-4- November 17, 1981 <br />rights acquisition by providing a dewatering device, capable of dewatering <br />the ponds within 36 hours after filling =fAfter re-estimating sediment yields <br />gives a sediment storage volume over 2 AF;"water storage rights must be <br />obtained for these structures. <br />To reiterate the requirements the Division imposes on The Rockcastle Company: <br />1) Provide substantiated estimates of sediment yield and design <br />the ponds to store three years of sediment yield; <br />2) Provide dewatering devices in each of the ponds which give a <br />detention time between 24 and 36 hours; and <br />3) Obtain water storage rights for any pond which exceeds 2 AF dead <br />storage. <br />One other item of concern is the statement on page III-28 that the embankment <br />foundation will be sloped to 1:1. It is not possible to construct a 2:1 <br />embankment on such a foundation and any foundation slope approaching this <br />value would be extremely unstable. TRC must explain this apparent discrepancy. <br />/mt <br />