HomeMy WebLinkAboutSANCTUARY WEST - PDP - 30-07 - CORRESPONDENCE - (3)r. '.
The other comments in your May 21, 2008 Memorandum will be address by other consultants
working on the Sanctuary West PDP.
If you have any questions or other concerns, please contact us at your convenience.
Cc: Steve Olt, Project Planner
Wes Lamarque, City of Fort Collins
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Odom" & A44m, IN6,
(970) 461- 0550
�745r (970) 461- 0551
May 30, 2008
Christie Coleman, P.E., CFM
Development Services Engineer
Larimer County Engineering Department
P.O. Box 1190
Fort Collins, CO 80522-1190
RE: Comments on Sanctuary West PDP — City of Fort Collins Referral
Dear Christie:
Thank you for your review and comments on Sanctuary West PDP. We would like to respond to
two of your comments in your May 21, 2008 Memorandum. In particular, comments number 2
and 3.
Comment 2: Care should be taken to insure that any historically south and east flowing drainage
from Green Acres development onto this project is not bermed or impounded by proposed
grading in the on site detention ponds. Historic drainage paths must be preserved.
Green Acres Subdivision drains to the north. Currently, there is no runoff from Green Acres
Subdivision that drains south onto Sanctuary West PDP. When Larimer County constructed the
Hollywood Irish Pond, they created the existing berm located on Sanctuary West PDP just south
of Green Acres Subdivision. The proposed improvements includes shifting the top of the berm
to the north while maintaining the same top of berm elevation. This will create less runoff from
the open space portion of Sanctuary West that will drain toward Green Acres.
Comment 3: In the submitted preliminary drainage report, please revised sub -basin H so it
releases at no greater than historic rates to the north into un-incorporated Larimer County. Please
also provide water quality measures for this sub -basin.
Sub -basin H will drain north into the County's Hollywood -Irish Detention Pond and then north
into the East-West Retention Pond located on Sanctuary West PDP. The East-West Retention
Pond was sized for the runoff from sub -basin H. The East-West Retention Pond was also sized
to provide stormwater quality treatment for sub -basin H.
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