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<br />It is recommended that the next time sediment is removed <br />• from the trap that the clastic material be positioned on the <br />north embankment area in the vicinity of Profile G. The <br />addition of 0.8 to 1.0 foot of sediment in this area will <br />increase pond volume to pre-construction design. <br />The angle of dip of the hillside slope and lateral collector <br />ditch east of Station E was determined to be 19.5 degrees. <br />Conversely, a site from the culvert outflow to the Explosive <br />Storage Sedimentation Pond established a three to four <br />degree dip. This 15 degree change in drainage ditch <br />inclination emphasizes the need for sediment trap <br />maintenance until the lateral collector ditch ceases to <br />transport significant clastic debris. <br />Thank you for the opportunity to be of service. <br />Respectfully submitted, <br />~y~t-mac ? ~"'".'"".~`'~ <br />Eug~e M. Shearer,P.E. <br />v <br /> <br />`li `.y+ yytt \ .~t~ <br />~ f/!`mo'd :! <br />• <br />