HomeMy WebLinkAboutRIGDEN FARM, 8TH FILING, LOT 5, GREASE MONKEY/CARWASH - PDP - 56-98AI - SUBMITTAL DOCUMENTS - ROUND 3 - CITY STAFF1!p
Ri9den Farms, Ft. Collins, CO
Rigcan Farm, 8th Filing, Lot 5
Rataalwftd Ruoff L .t.
ProjedA 050001
Designer KW
Date 01/04106
Stom1(yr) 5, 10. 100
Catchment Data
Local Runoff
Total Runoff
Comments
Design
Ca1MmeM
Area
L(5)
Minimum
CxA
I
D
Minhnum
Total
I
p
Point
ID
(ac)
TO)
(iuhr)
(as)
T(c)
CxA
(in,
(as)
1
0.13
0.90
5
0.117
4.55
0.53
Kimley-HOT Inlet A-4 Inlet
Total 5 yr flow. 2.87 cis
2
0.26
0.90
5
0.234
4.55
1.06
Offshe
0.09
0.40
5
0.036
4.55
0.16
Catchment Data
Local
Runoff
Total Runoff
Comments
Design
Catchmem
Area
COO)
Minimum
CxA
1
p
lAninum
Total
I
p
Pam
ID
W)
T(c)
(nthr)
(ds)
T(O
CxA
(NhQ
(tls)
1
0.13
0.90
5
0.117
4.87
0.57
Kimley-Hom Inlet A4 Inlet
Total 10 yrflow: 3.08 cis
2
0.26
0.90
5
0.234
4.87
1.14
OffsRe
0.09
0.40
5
0.036
4.87
0.18
Catchment Data
Local Runoff
Total Runoff
Comments
Design
Catchment
Area
C(100)
Minimum
CxA
I
a
Minimum
Total
I
0
Point
ID
(ac)
T(c)
(in,',)
(of$)
T(c)
CxA
(niiw)
(ae)
1
0.13
0.95
5
0.1235
7.50
0.93
Kimley-Horn Inlet A-4 Inlet
Total 100 yr Flow: 5.00 cfs
2
0.26
0.95
5
0.247
7.50
1.85
'
Offsi[e
0.09
0.44
5
0.0396
7.50
0.30
inSITE
ineerinq
February 9, 2006
Mr. Glen D. Schlueter
Mr. Basil Harridan
700 Wood St.
P.O. Box 580
Fort Collins, CO 80522-0580
RE Grease Monkey and Carwash, , Lot 5, Rigden Farm, 8' Filing Stormwater
Compliance
Dear Mr. Schlueter & Mr. Basil Harridan:
3337 East 138th Avenue
Thornton, Colorado 80602
Please review the attached documentation for compliance regarding the proposed Grease Monkey &
Carwash development in The Shops at Rigden Farm, Lot 5. The Final Drainage Report For The Shops
at Rigden Farm, Ft. Collins, Colorado, Kimley-Horn and Associates, Inc., Approved March 11th, 2004,
was used as the guideline for design of this site. The grading and drainage plan submitted is in general
compliance with this report.
The propose site has been graded with slopes ranging from 1 - 2-1/2% on average. Two drainage
basins were developed to serve the approximate Northwest and Central/Southeast portions of the site.
The Central/Southeast basin drains to a proposed 4' curb inlet with a 100 yr flow of 1.85 cfs. The
Northwest basin drains to an existing curb inlet (A-4, Kimley-Horn) with a 100 yr flow from the site of
.93 cfs. The proposed system uses and ties to the existing system installed for The Shops at Rigden
Farm. The proposed non -point ofisite flows consisting of grass, sidewalk, and landscaped areas
amount to 0.30 cis. An existing area inlet (A-3, Kimley-Horn) will be removed and replaced with a
standard manhole. The final site drainage configuration will be split between the proposed curb inlet
and the existing inlet A-4. The proposed inlet on the South side of the site will replace capacity from the
removal of inlet A-3. The existing inlet A-4 was originally proposed to receive 4.07 cfs during the 100 yr
storm as described in the Kimley-Horn report and shown in the drainage summary table on sheet C-12
of the Utility Plans for Rigden Farm, a Filing, The Shops at Rigden Farm. The additional flow added to
inlet A-4 during the 100 yr storm is 0.93 cfs. The total flow during the 100 yr storm is 5.00 cfs. This
total flow is within the capacity of the 4' Type R inlet.
All proposed pipe is Class III, 18" RCP.
Sincerely,
Kurt Kowar, P.E.
Principal
Insite Engineering
phone: 720.3393759 fax: 720.528.7867 email: kkowar@insiteeng.com www.insiteeng.com