HomeMy WebLinkAboutCOLLINDALE BUSINESS PARK / CBW INC - I*P SITE PLAN REVIEW - 2-89 - SUBMITTAL DOCUMENTS - ROUND 1 - DRAINAGE REPORT0
0
STORM DRAINAGE REPORT
COLLINDALE BUSINESS PARK
Collindale Business Park is within the Fox Meadows Drainage Basin. The
property is located on the west side of Timberline Road from 1330 feet
south of Horsetooth Road to 3050 feet south of Horsetooth Road. The
gross area of the property is 44.5 acres, including the west 2 of
Timberline Road and the east 2 of the Union Pacific Railroad R.O.W.
There is no offsite run—off onto the site. The south boundary is a ridge
from which the drainage goes southerly to the Chandler sump. Flows from
the west are blocked by the Railroad embankment. The north boundary is the
low point and drainage flows east along this north line. There is an
irrigation ditch running east parallel to and about six feet north of the
north line. This ditch belongs to Bob Shields. The ditch can carry
irrigation water from Warren Lake across the golf course, under the railroad
and the north property line. Historically, this ditch has carried storm
drainage under the railroad from the golf course and from the railroad
right—of—way. This flow from the golf course, according to the Fox Meadows
report is Q2=1.0 c.f.s. — Q10=3.0 c.f.s. — Q100=9.0 c.f.s. We propose to
not disturb this ditch or alter the flows which it now receives.
We propose to construct one detention pond for the entire 44.5 acre
development, so that there will be no detention required on the individual
lots. The proposed detention pond is located at the northeast corner of
the site. The outfall from the pond will drain under Timberline Road to
the east and then into the Sunstone swale. The pipe under Timberline Road
is per the design of the Fox Meadows Business Park Drainage Channel. We
plan to carry the storm runoff by overland flows to the detention pond.
The majority of the flow will be carried to the pond by a drainage Swale
which runs to the north along the west side of Timberline Road.
The computation sheets of this report show the total required detention to
be 404946 cubic feet, and the capacity of the proposed detention pond is
405850 cubic feet.
The attached map of the area shows the direction and quantity of flow at
critical points.
Office of STEWART & ASSOCIATES, INC.
Phil li I. �R�ison, 'PEL.S.
't,11rrrrrry,�
•
0 0 �
4502 •�-_
CF
COMPUTATIONS
James H. Stewart & Assoc. Fort Collins, Colorado
By: Date Client: K. 3W 7—i 'e`/ Sheet No. Z of b
Chkd By: Date Project: C01lir7o1a1e 13012es5 /mark Job No.
Subject :!5"�-orri ra%rnctc,e CaJcyJa-i/or)I
offal Gross Are—c.- = �-�•� Acres � ihcl. XZ KG�lro��/z7i,..Serli�e�{ cJ,�.dN.ic6
)4is4r.,ric - G=.o,ZS .5 = 0.66A,
70
Qz= G1/� �0.25��0.83)�1��-5) � `� Gts f}�Lo�✓�ac� ovrr-,+ZL
Develo�ed- G 0.8 s =0.7. % - _ la00
-f
L 0.?
O- 6 )6, 55)� ¢- , S) = SS Z c� S
C0,8)�2.7)C4-�
Vo%vMe of de�en�;an reZuirecl z. cv, ;4. = 2.3 ac. �-f,
VO (..(/ M F- Or- F'VA/P
F-)eL/Ct 0 n Area- To T.+t l/o1om P
l 3 00
4- 2
t'a504
3 00
7-1750
1-3
3 -1000
Z. 30 0
7osoG
¢¢
/0Z000
y35�-o
ii ¢oo6
/ 37 500
34-5 o SO
C' U 8U0
4-<�. 4-
l S6-0 0
¢-U Ski Sv
0 COMPUTATIONS
James H. Stewart & Assoc. Fort Collins, Colorado
By: p/ IS Date Client: k. 13 i 1 f 7 ie y Sheet No. -3 of
Chkd By: Date Project: CISO&r7 d a/P (31511? Pss Forte Job No.
Subject otDr ► ncac,e Cal cal c-, �lo�qS
To--aJ F�erui r-(r� —
MASS MET#40D
T
T
Gq
v
io
7.3
(I.Z�)�0.W4-+.5)
1 y4-q/6
iv
5. z
.S
Z-7 7 C 80
30
4-1 /S
3 3ZQ-1 IV
4U
3,s
373800
J-) G v LO
yo
1•8i
¢¢Q-rTr
►00
30
�
I LOW99
I J0000c
O /o to 30 40 60 70 120 IB4
COMPUTATIONS
James H. Stewart & Assoc.
Fort Collins, Colorado
By: P 1 Date 11IL"'Idl Client: K 13 i )1 77) e v Sheet No. 4— of
Chkd By: Date Project: Collind al e SUSlnesS POrk Job No.
Subject t-►--1 Dt'ct 1 na a e
Poc.rce4c G.- 0.75 (cglcvla'i ) - L = a0or-s = /�
TC = j i r-+i n Te- r ad = /U r, i n
0.-75')(1.Y �� 4) - -t./ --If
lS.a
Gl iav ti c�ct� _ C/. ZO (0.75) (-7)C 6. ¢ = ¢ Z G�s
Pa t-ce I Z - At-e�-, = S.7 Ae-
Te- _
/S +.,i^ %ra♦
Q z =
G//4- = (O. a-) ( Z.1) 5;--7 �
L =0.8 - L
CJF
Par'e�l 3 - ,4re�z. 6�0•�'
V iap = 7) (1,3) z �
s = l.D70
- L z 3301 - S = 1,017.0
�0knbiCned Par -cell 2 cs,Z 3 - /3-: 7,0
r� t7 C-V �.
G�zz GIA--:� ('0.s=)(2- (7,0
C 3-s-)C 7.0
GZ1Up CIFCl/4 _ (/.25)�O,Pi)( 7) C 7,0) Z G�S
Pa r C el ¢— /�4 t-e a= Z_ 3 ,4 c C= 0. a L= 3 ¢-0
fr� s
Gt ry = G/A- (�/, 8) C 3.3) 2 3) %. 1 c T S
62C�-CIA �(/,25)(0.B)(7)(Z.3)
it7e�- Pqr-ce-ls
- Arcs
/.25)(0.0)7)(5.'5-) z 38•'S'-c-FS
G,O.,f- Lz ct70 - -f=l7
S=/.0%
e- _- o. 0 L i G m s= /. 07#
- Arcs
/.25)(0.0)7)(5.'5-) z 38•'S'-c-FS
G,O.,f- Lz ct70 - -f=l7
S=/.0%
e- _- o. 0 L i G m s= /. 07#
COMPUTATIONS
James H. Stewart & Assoc.
Fort Collins, Colorado
By: Date 89 Client: 11-• 3111 T/eY Sheet No. of G
Chkd By: Date Project: C5'1li zda% £326 incst Job No.
Subject Sf o rrn Dr -a i na a p-
Area ! ► 2 A C 1,<17, G = U, g - L = C50 '
too
�, � vv � G �C//� = �I • z5)�0.8)(�)(1.2) = F3. 4- c�s
•Pa z . q 4e e,- = o. (5 - 4- = & ¢0
Q16, 0,el) (3-7)(z. : 8.6 GFS
Z0.3 c�s
hocrcel y -
Area. r 3.57
1v.2 GtS
s.$) z
10.6 cjs
7)(3, 5)
= L4-f C,�-S
Ljsev'- 5-17
i
dH Lic
M o7 E
/e4t.7 S'
�/` —�
�--•�/
�N00•Ob4"G
17Jo.17' ~_--•.
v.0 cis
NOTE .',hirfds' , rl3olrort d,lch
rsform f!o✓
—/� /
/
snRCrl
••rtd fr0^I (roll LnvI.P.
rO GO[P n rloi
—ul
FU/V e sirs r +•: o)�i. / LawREh1'�E DRIVE J W ¢
tL
71
.--
I / •� 7 1�%�/// / � J/ / � PnRGEL / rM.(tL � I
, rAFCFLI
ez
V/A%/
It�1—� EXISTIN6
/ / 4• GVwlC rtrT- 7AAI __ __ _—_.__- -u�,e i�ei -_
It
a:T w euRnelt seerla,—�b-sr�—7-JA/FBEf}�L-tld��-fi8A�7"I.s`�..'-'_•� -
—� rn I O
tj
Ntj vS
Z ,
Cl V u
6 GA',,- L E- : /"� ZZ5 ±
W
CO.I[T s CATCN i7<l E,Al o d'
a
Q ioAr COn13T IJO - .: 4 aIL
��Ir c. 7S .i „• w,�rw of ^�vn FlS
LON ST 4-' C^TCY 13 +SIM
lAI
,s N
a
o
n
b \
S�7'4 C,n11� J l/i 00
u
\ N
•Y'
- -r(rEc vrtevlvvs r •1 -- J _
r,NORCrw JVi HW �07.n � I � G^NFL a'
` W
_ Q
-
p v �..
2 m = ar
Od a
i
i^
7�n z
v �j