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~:. <br /> <br />Page 4 <br />Mike Savage <br />December 19, 1980 <br />or submit new plans for a dewatering device that does not haveto be maintained. <br />An alternative would be to use an open spillway with an orifice to dewater <br />the pond. <br />If TBM decides to use open spillways then they must indicate what detention <br />time each pond will have. Even if manual spillways are retained TBdf must <br />supply detention time data. This is to insure that effluent (imitations can <br />be met. <br />Sedimentation ponds will l~avc to be designed under the supervision of a <br />qualified registered engineer, and the ponds must be certified by a registered <br />professional engineer when completed. We will need a certification letter <br />after each approved pond is completed. <br />/k <br />