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<br />Page 1 of2 <br /> <br />Kim Stephan <br /> <br />Statz, Mark R [Mark.Statz@bonestroo.com] <br /> <br />Wednesday, May 14, 20082:08 PM <br /> <br />gregg@metroswcd.org <br /> <br />PPalzer@Centervil/emn.com; Tom Lee; Kevin Amundsen; Seeley Suzanne; McDowell, Jeff J; <br />dlarson@centervillemn.com; kstephan@centervillemn.com <br /> <br />Subject: FW: Centervil/e Rain Garden <br /> <br />Attachments: DSC03789.JPG; DSC03822.JPG <br /> <br />From: <br /> <br />Sent: <br />To: <br />Cc: <br /> <br />Gregg, <br /> <br />Thanks for taking the time to do your test. We'll take a look at what we can do for the two isolated <br />areas to make them drain out. <br /> <br />We still intend to do a structured test of the drain down time by filling the garden with the nearby <br />hydrant and monitoring its draw-down. We just need to find a 2 day stretch without rain in the <br />forcast. <br /> <br />Mark Statz, PE <br />Associate <br />Tel 651-604-4709 <br />Cell 651-775-5126 <br />mark.statz@bonestroo.com <br /> <br />. Bonestroo <br /> <br />From: Gregg Thompson [mailto:metroswcd@isd.net] <br />Sent: Tuesday, May 13, 20085:56 PM <br />To: Statz, Mark R <br />Cc: thompson, gregg <br />Subject: Re: Centerville Rain Garden <br /> <br />Mark, <br /> <br />Yes. I did the compaction test on Friday. The soil-compaction meter I have is a 30" long probe. I was able to <br />sink the probe all the way (staying within acceptable compaction limits) throughout most of the raingarden area, <br />with the exception of the area just beyond the rock at the inlet and the area immediately before the outlet. I'm <br />attaching two photos of the raingarden from this past Friday - photo 3789 shows the soil-penetrometer. Photo <br />3822 shows the rock inlet I sediment-trap area still ponding water (I don't know when the last substantial rain- <br />event was in Centerville that filled this area). If the inlet area has continuous ponding, this would be cause for <br />some concern regarding mosquito-production, if it continues to hold water as we go into mosquito-season. The <br />inlet may need more monitoring to see if it dries out, and how long that takes after a substantial rain-event. <br /> <br />Do you know if anyone has monitored the period of time it takes for the raingarden's above-ground ponding area <br />to dry after a substantial rain-event, since we had met on-site when the soils were still frozen? <br /> <br />Hope this helps. <br /> <br />Also, I'm going to phase out this email account very soon - have switched to: gregg@metroswcd.org - so please <br />update your address book. <br /> <br />5/30/2008 <br />