HomeMy WebLinkAboutWPO200600082 Review Comments Stormwater Management Plan 2009-10-07Page 1 of 1
Amy Pflaum
From: Philip Custer
Sent: Wednesday, October 07, 2009 12:35 PM
To: gloeckner @embargmail.com
Cc: Amy Pflaum; Andrew Lowe; Roy Whitlock
Subject: Westminster Cantebury
Kurt,
I have pulled the site plan for Westminster Canterbury project that will show where the runoff in the area
around this phase is headed. The plan will also give me a better idea of the watersheds to the other
facilities on site. I will work with Amy in the next few weeks to come up with the county's recommendation
for the solution to the stormwater management issues experienced on site. However, before we can
really get into the numbers, we'll need a graphic showing the area of each roof that is currently being
directed to a raingarden /biofilter. Because of the intricate architectural details of the building and the
resultant high number of downspouts, I had the impression after our meeting onsite that only a small
percentage (- 10 -15 %) of each roof is being treated. The solution will likely be the treatment of an
equivalent area of imperviousness somewhere in the vicinity of this phase, but we'll need to know for sure
how much imperviousness needs to be accounted for before an adequate schematic plan can be
designed.
The concept in my head right now is the larger biofilter in the back that you had mentioned and converting
the swale on the opposite side of the road into a wet bio -swale (see Figure 3.13 -2 of the VSMH). Once
you give me the graphic of what is currently being captured, I'll run some numbers to see if this would
meet the minimum requirements of our SWM regulations.
Please let me know if you have any questions.
Thanks,
Phil
10/28/2009