HomeMy WebLinkAboutCT 02-22; VILLAGES OF LA COSTA GREEN NBHD 1.09; SEWER STUDY; 2003-09-22I
1 HUNSAKER
^ASSOCIATES
SAN DIECO, INC.
BEcEr
PLANNING
ENCINEERING
SURVEYING
IRVINE
LOS ANGELES
RIVERSIDE
SAN DIECO
SEWER STUDY
for
LA COSTA GREENS
VILLAGE 1.9
City of Carlsbad
Prepared for
Morrow Development
1903 Wright Place
Suite 180
Carlsbad, CA 92008
w.o. 2352-68
September 22, 2003
DAVE HAMMAR
LEX WILLIMAN
ALISA VIALPANDO
10179 Huennekens St.
San Diego, CA 92121
(858) 558-4500 PH
(858)558-1414 FX
www.HunsakerSD.com
lnfo®HunsakerSD.com
Hunsaker & Associates
San Diego, Inc.
R^yrriond L. Martin, R.C.E.
Project Manager
o
11
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La Costa Greens Village 1.9
Sewer Study
TABLE OF CONTENTS
SECTION
Design Criteria I
Sewer Study Sunnmary II
Sewer Study Map III
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La Costa Greens Village 1.9
Sewer Study
Design Criteria
Dwelling Units 71
Demand 220 gal/cap/day
Peak Factor 2.5
Maximum Depth 0.50 diameter
Roughness, n 0.011 for PVC
Sample Calculation
Peak Flow = Dwelling Units x Demand x Peak Factor
Peal Flow = 71 units x 220 gal/unit day x 2.5
Peak Flow = 39050 gal/day
Peak Flow = 0.0602 cfs
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La Costa Greens Village 1.9
Sewer Study
Results
FOR: La Costa Greens. Villaae 1.9
W.O. 2352-0068
BY: Steve Jerrick
SEWER STUDY SUMIVIARY
DATE 9/20/2003
REFER TO PLAN
SHEET:
LINE FRO
M TO POPULATIO
N PER D.U.
IN-
LINE
D.U.'
s
POPULATION
SERVED
PEAK
/AVC.
RATI
0
PEAK DESIGN
FLOW
LINE
SIZE
(INCHE
S)
DESIG
N
SLOPE (%)
dn
(FEET
)
dn/D
VELOCI
TY
(F.p.s.)
COMMENTS LINE FRO
M TO POPULATIO
N PER D.U.
IN-
LINE
D.U.'
s IN-LINE TOTAL
PEAK
/AVC.
RATI
0 M.G.D. C.F.S.
LINE
SIZE
(INCHE
S)
DESIG
N
SLOPE (%)
dn
(FEET
)
dn/D
VELOCI
TY
(F.p.s.)
COMMENTS
1 3 2 2.75 4 11 11 2.5 0.002 0.003 8 3.11 0.02 0.03 1.11 **
2 2 1 2.75 6 16.5 27.5 2.5 0.006 0.009 8 8.7 0.03 0.04 1.82 **
•
3 1 ex 2.75 4 11 66 2.5 0.013 0.020 8 6.72 0.04 0.06 2.39 **
4 5 4 2.75 5 13.75 13.75 2.5 0.003 0.004 8 2 0.03 0.04 0.91 **
5 4 1 2.75 5 13.75 27.5 2.5 0.006 0.009 8 2 0.03 0.05 1.30 **
6 5 6 2.75 5 13.75 13.75 2.5 0.003 0.004 8 2 0.03 0.04 0.91 **
7 6 7 2.75 5 13.75 27.5 2.5 0.006 0.009 8 2 0.03 0.05 1.30 **
8 7 8 2.75 5 13.75 71.5 2.5 0.014 0.022 8 5.63 0.04 0.06 2.59 **
9 8 9 2.75 9 24.75 96.25 2.5 0.019 0.030 8 1.95 0.06 0.09 1.91 *
10 9 10 2.75 9 24.75 121 2.5 0.024 0.037 8 5.72 0.05 0.08 2.87 **
11 10 ex 2.75 3 8.25 129.25 2.5 0.026 0.040 8 2 0.07 0.10 2.20 **
12 11 7 2.75 11 30.25 30.25 2.5 0.006 0.009 8 2.57 0.03 0.05 1.43 **
Velocities are slightly less than 2 FPS where slopes are less than 2% due to the following conditions:
1. Existing access hole elevation; and,
2. Maintain current street slope and minimum depth of sewer main on adjacent proposed streets in order to keep proper vertical
clearances.
Velocities are slightly less than 2 FPS, however, minimum slope of 2% maintained.
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