ST0501-CS100129 (2)
(3/4/2010) Keith Marvin - ST05-01 Deforest Road ReconstructionPage 1
From: George Marshall
To:Marvin, Keith
Date: 1/29/2010 2:52 PM
Subject: ST05-01 Deforest Road Reconstruction
Attachments:ST05-01 Deforest Road SD Calcs 10 YR n 100 YR Final.xls
Keith,
Please take a look!
Thank You, George
Dan,
Due to the additional drainage area and time of concentration of 15 min, please design a storm sewer system to have
parallel 36" RCP from the end of concrete to approximately at the upstream end of the existing 36" RCP. Please take a look
at the attached spreadsheet for my draft design and use it to come up with your final design. This design will allow the 10
year storm event in the pipe with minimal overflow during the 25, 50 and 100 year events. We have also reviewed that the
HGL is still below the adjacent finish floor elevations.
This design also saves from tearing up the existing concrete, screen wall and pond banks.
Thank You,
George Marshall