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SEDIMENTATION PONDS DEWATERING DEVICES <br /> Spillways were constructed for the following ponds during <br /> the summer of 1982 (See drawing Page 18) : Ponds 006 , 008, 009 <br /> and 010. Ponds 007 and 009 are in series and the spillway was <br /> constructed for pond 009. <br /> All ponds in Coal Basin (001 to 018) as well as the Carbondale <br /> loadout sedimentation pond 019 have been surveyed. Within six <br /> months the engineer design drawings will be completed and submitted <br /> certified by a registered professional engineer attesting that <br /> they are built as designed. <br /> Certification of any ponds yet to be constructed will be <br /> submitted immediately following completion. <br /> All of the above ponds will be dewatered within 24 hours <br /> following any runoff event by siphon or pump to maintain storage <br /> capacity for a 25 year/24 hour precipitation event. <br /> All dewatering devices will be located above the maximum <br /> sediment storage level of each pond. <br /> (Stipulations 4 , 5 & 6) <br /> 17 (Vol. 3 , App. II-B-7 , Att. 3) <br />