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James Pierce, Jr. <br />RE: Clarification of comments on JBird drainage http: / /mail.aol.com 111 /aol- 6 /en -as /mail /PrintMessage.aspx <br />Is it the Division's intent that the ponds be designed to hold a 10 year event and then be capable of passing through a second event of up to 100 year flow? <br />This has some impact on how soon the pond will need to be dewatered after being filled. It would also impact the spillway design if it only needs to be designed <br />for the calculated flow occurring after the pond has filled to its 10 year design capacity. <br />Not a major item of concern, more a matter of curiosity. <br />Again if you could clarify the Division's position on these items prior to the resubmittal of the JBird or Prince Albert drainage plans it could help avoid additional <br />resubmittals. <br />Thank you for your consideration. <br />Sincerely - <br />P.S. I am also sending screenshots of the abstract for the 'Sandstone Materials Used as Riprap' and the flow chart for the limestone field test which I believe could <br />be modified for use in evaluating sandstone. <br />3 of 3 2/9/2012 12:40 PM <br />