HomeMy WebLinkAboutSTUART HILL PUD - Filed GC-GENERAL CORRESPONDENCE - 2012-01-0411 March 1980
City of Fort Collins
300 Laporte Avenue
Fort Collins, CO 80521
Re: Stuart Hill P.U.D. Drainage
Gentlemen:
Please find attached storm drainage calculations that are the basis for
the storm drainage improvements recommended for the Stuart Hill P.U.D.
The improvements and calculations are based on the Storm Drainage Design
Criteria manual published by the Engineering Division of the Fort Collins
Department of Public Works.
The Stuart Hill property is approximately one acre in size and drains into
Spring Creek which lies to the north across the Spring Creek Meadows
property. Due to the lack of an existing drainage easement to Spring
Creek, we elected to retain on site the excess runoff caused by develop-
ment. The difference between the developed 100 year design storm runoff
and the 2 year existing design storm runoff (0.08 acre feet) can be stored
in the proposed detention pond. The outlet discharge will be 0.5 cfs,
which is the existing 2 year design storm discharge.
The Rational Method was used to calculate discharge and the Triangular
Method was used to determine volume of storage.
The runoff will not be collected in channels, but will sheet flow to the
low end of the property and into the pond. The pond will have an outlet
to the northwest corner of the property. The proposed outlet is small and
will require frequent cleaning to operate efficiently. The cleaning will
be done by the Homeowners Association as. part of the maintenance of the
open space.
If you have any questions or need additional information, please contact me.
Sincerely, wb
ENGINEERING PRO SIONALS, INC.
Fred L. J son, P.E.
FLJ/lb
Encl .
303/221-3760.2020 Airway Ave. • Fort Collins, CO 80524
f
July 9, 1982
Project No.: 90-2
Mr. Joe Frank
Planning Division
City of Fort Collins
P.O. Box 580
Fort Collins, Colorado
80522
Re: Replat of Stuart Hill P.U.D. - Drainage Facility Adequacy
Dear Joe:
I have reviewed the drainage plan for Stuart Hill P.U.D. The
impervious area has increased by 0.8% of the total area or 0.008
acres. This small increase in area does not affect the adequacy of
the drainage facilities designed for the original plat.
If you have any questions, please do not hesitate'to contact our
office.
Sincerely,
ENGINEERING. PROFESSIONALS, INC.
Glen D. Schlueter
I hereby affirm that this letter concerning the drainage design for
the Replat of Stuart Hill P.U.D.'was prepared under my direct
supervision for the owners thereof. To the best of my professional
knowledge and belief, it meets or exceeds the criteria in the
Larimer oun Storm - Wa&er Management Manual.
Michael N. Schmid, Professional En g i ne er RECEIVED
Colorado Registration No.: 14533
jUL 16 198�
PLANNING
DEPARTMEKV�
303/221-3760.2020 Airwav Ave. • Fort Collins. CO 80524