HomeMy WebLinkAboutDrainage Reports - 06/14/1991ln�l
.y
FINAL DRAINAGE REPORT
FOR
SUN DISK VILLAGE
PREPARED FOR
GIULIANO & FATHER CONSRTUCTION, INC.
PREPARED BY
STEWART & ASSOCIATES, INC.
JUNE 14, 1991
LOCATION AND DESCRIPTION OF SITE:
Sun Disk Village is located in the Southwest 'I of Section 26,
Township 7 North, Range 69 West of the Sixth P.M. The site is north
of Horsetooth Road and east of Windmill Drive. The existing
Foothills Park Subdivision lies to the east, Horsetooth Road lies
to the south, Windmill Drive and an existing detention pond lie
to the west, and a regional drainage channel runs along the north
side of the site. There is an existing subdivision north of the
regional drainage channel. The gross area of the site to the
centerline of adjoining streets is 10.036 acres. The south part
of the site is partially developed with 3 existing condominium
buildings and their adjoining drives and parking and with 2 lots
for future condominium buildings. The north 6.5 acres is existing
bare ground with some vegetation. The site is within the Foothills
Drainage Basin.
EXISTING DRAINAGE CONDITIONS:
The existing site drains north to the regional drainage Swale,
except Horsetooth Road, which drains to the east. The existing
condominium development drains undetained through the undeveloped
6.5 acres to the regional drain swale. There have been no drainage
facilities constructed on the site, other than the regional drainage
swale.
PROPOSED DEVELOPMENT:
The undeveloped north 6.5 acres is being replatted into single
family residential lots and a detention pond tract. The detention
pond is sized to provide detention for 8.855 acres. The existing
regional drainage swale, the existing Horsetooth Road which flows
east, and Basin Five which flows to the existing regional drainage
swale undetained are excluded for detention. The pond has a 66,114
cubic foot capacity to elevation 57.8 which is 6,897 cubic feet
over the required capacity of 59,217 cubic feet. Runoff from the
existing condominium development will drain on the surface via a
pan between Lots 19 and 20, then along the west gutter of Sun Disk
Court to a catch basin, then through a pipe into the detention pond.
Release from the detention pond will be directly into the regional
drainage Swale.
There are 3 critical flow points: the flow between the
southerly lots from the condominium site, the flow in the pan across
the entrance drive on the west gutter of Sun Disk Court, and the
flow into the catch basin and between lots into the detention pond.
1
Sun Disk Village Drainage Report
June 14, 1991
Page 2
It is the developer's intention that the detention pond tract
be .deeded to the City for permanent maintenance, after the pond
construction and vegetation have been accepted by the City.
The attached calculation sheets show the allowable release
rate, the required detention volume, and flow rates at critical
points. The attached map shows the proposed site improvements with
critical points and sub —basins.
Franklin D. Blake, P.E. & L.S.
�4
No Text
REGION/aL 09/gl",gr.0 swALe
rvrc,>C' OoTM Rol=aD
I
I I
_ i C ®N9PUTAT,14NS I
I1
.James H. Stewart & Assoc.; Fort Collins,'Colorado
By; Date Cllent: i /' A Fr7G� N of —
.... ' i.... Sheet o. l . _
�3i -�
/!^ `t. ���r Job No,
Chkd B Date �-- Fro I
I ! 1ec
Subject
i
!iC_F— -
✓3,�4 9�GI rrrir✓
_ / -I fore; 3 2�. I
, I
I
I
: :mrf+✓.r�.r sr_�r �. �� I � I I I I I. I_ � � j ! � 1 � ! I I i
CO, MPU A I NS
James H. Stewart & Assoc.,
Fort CollIns, Colorado
Date Cllent:j s
By- hoot No.' of tz
qhkd By: Date
Project: - Job No.
Subject
mr"
I
Fort Collins, Colorado
� Shoot No. of '5;0_
Job No.
1
I�57
i
COMPUTATK
James H. Stewart, & Assoc
i
By. Date GS9/ Cllent-; i-
Chkd By: Date Project:
• Subject
_ ..�... . I 1
x
G
j I
�J A 2, r
I I I
tit.
No Text
COMPUTATI NS 1 -
i
James H. Stewart &,Assoc.;
- Fort Collins, Colorado
gy: JAG! Date �J���//9�/ Client ; wl���d � I Sheet No. -s of _
...._.. � ____�
Ch ,
' S�' Job No. I
kd g Date Pro act: ��
I I i
bjectr.��/.�ir�a5� i I.
COMPUTATI NS
A
James H. Stewart & A �8: Fort Colll:ns, Colorado
a Oc'!
Sh
I'
By. Date Cllantoleat No.L-4LOf
Chkd BY: Date Proj�ect- —::�O"71
Job No.
s
ubject
rz
2190"
0;
ICOMP� UT_AT111"'IgI NS
JamsStewa&Assoc ; .
; I ; Fort Collins, s,i Colorado
By. DateGCllent /
.-..:.... I Sheet No. If
L ����
: I
I � Project:Job No. '
Chkd By Date
Sub act
e4S
IF
,... !
%G 7
2
3¢:'s/7 6 �9,GSZ
1-5 I ��7:5� c�%9,TDB ZGfrZ 41i�9Z�.
Z3 Z¢
� I ._ . SZ � `tag
15 0 SS, Z9'I
72,5158i2
913
I _
j
I
• I � i i i i
I I
i
p
I
I.-- I L
-CO
Mp TA I NS
James H. Stewart & Assoc.
By V Date rilants!
Chkd BY: Date- Project: -
Subj Oct
42
I?
9-7
No Text