HomeMy WebLinkAboutSEVEN GENERATIONS (FORMERLY EASTBROOK) OFFICE PARK - PDP - 4-06 - CORRESPONDENCE - DRAINAGE REPORTSteve Olt - Stormwater on Eastbrook Page 1
From: "Michael Oberlander" <mike@northstardesigninc.com>
To: "Dave Sitzman" <davesitzman@sitzman-mitchell.com>, "Cathy Mathis"
<cmathis@vfavfr.com>, "Joanna Frye" <joannafrye@vfavfr.com>
Date: 03/14/2006 11:57:13 AM
Subject: Stormwater on Eastbrook
I met with Glen and Basil this morning. Based on my calculations, the Eastbrook site is less than the
master plan imperviousness, the overall master plan basin is and will remain less than the City had
calculated, and the peak flow off of this project will occur prior to the peak flow in the channel from the
large upstream area.
Glen and Basil agreed that for these reasons, as well as the fact the this site is on the lower end of the
overall basin, we can get a variance from stormwater quantity detention for this project. I will include all of
the calculations and rationale in the revised drainage report. I will be modifying the pond to keep the area
on the west a little flatter for access to the railroad ditch on the west side of the site (the pond will be
narrower and longer).
Glen would like to try to get a meeting with Cathy, Joanna, and myself early next week on the site to
discuss the landscaping on the property line and the requirements the City had for access to the drainage
channel to our west. I am out on Monday, but available both Tuesday and Wednesday.
One thing to note is that we are at the limit of the amount of hard surface that we can have and meet
stormwater's expectation. We cannot add any impervious area without removing some elsewhere. I think
that any site changes will reduce the area of hard surface, but we need to keep this in mind.
Thank you
Michael Oberlander, PE, LSI
North Star Design, Inc.
970-686-6939
CC: "Basil Hamden" <bhamdan@ci.fort-collins.co.us>, "Glen Schlueter"
<GSCHLUETER@fcgov.com>, "Steve Olt" <SOLT@fcgov.com>