2010050306 - Maps - Submitted March 3, 20109-New
VICINITY MAP
ngle Family Homes 4 1 BMP Home, P ® b
Los otos, California
SHEET INDEX
CS COVER SHEET
A-1 NEW SITE PLAN
A-2 PROPOSED FLOOR PLANS HOUSES TYPE A & B
A-3 PROPOSED FLOOR PLANS AND ELEVATIONS
BMP UNIT, HOUSE TYPE C
A-4 EXTERIOR ELEVATIONS HOUSES TYPE A & B
A-5 STREET SCAPE & SITE SECTIONS
1 GRADING & DRAINAGE COVER SHEET
2 TENTATIVE MAP
C-1 UTILITY PLAN
C-2 GRADING & DRAINAGE PLAN
C-3 SECTIONS
C-4 STORMWATER MANAGEMENT PLAN
L-1.0 PLANTING PLAN
L-1.1 TREE INVENTORY PLAN
L-2.0 LANDSCAPE CONSTRUCTION DETAILS
L-2.1 LANDSCAPE CONSTRUCTION DETAILS
LANDSCAPING
REED ASSOCIATES.
Paul Reed
477 5. Taffe Ave.
Sunnyvale, CA. 94086
408.481.9020.
COVER 5H LAY •
TA
SCOPE OF WORK:
9 SINGLE FAMILY RESIDENCES
+1 BMP HOME
Project Info
Owner:
LANbMARKbEVELOPMENT
APN: 529-14-012, 529-14-067, 529-16-073
Existing Zoning; RM:5-12:PD
Proposed Zoning: R-1:8:PD
Site Area; 3.06 AC, (133,293.6 S.F.)
CIVIL ENGINEER
CIVIL ENGINEERING
ASSOCIATES INC..
2580 N. FIST ST. SIUTE 290
San Jose, CA. 95131
408.435.1075
0
DIP,Ark-FlANNII
Bowe•; sta: NG
Lcs q los 2
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offifi;mg If100414orr
RECEIVED
MAR 3 - 2010
TOWN OF LOS GATOS
PLANNING DIVISION
DESIGNER
Paragon Design Group, Inc.
Rodger W. Griffin, FAIBD
405 Alberto Way, Suite #C
Los Gatos, CA. 95032
408.358.3707
Slat`
lI
0
ex
ex
Nic
FRANK AVE.
NOTE
ALL CHIMNEY PROJECTIONS WILL BE 24" TYP.
-------------
1
—Site Data
Area Use;
Open Space
Streets & Parking
Building_Goverage___
Total
Open Space;
Priv. (yards)
Public
Total
II
II
II I I
/
sv I
I / /
�o II / /
29 II
/
j( /
I
I 1
I
N31°03'10"E
73.05,
/ 2
P
EwsnN; TREE
TO BE REMOVER
78
EXISTING TREES
TO REMAIN
f7?) (78
1 N20°11'00"E
I! - mirk
EXISTING TREES
TO REMAIN
(29)
�(1 j2J (29)7 meiw1i,_E"""
PRIVATE STREET)
m _ TREES- ) .� (7) _.
TO DERE/40M (7.17) lift (9)
(3)
ENTRY STRUCTURE
FRONT SETBACK B'-6° MAX. HIGH
TO ENTRY STRUCTURE SEE LANDSCAPE PLANS
i.
95
o�
3 EASTMENT
46'- 1
EEs7
DERE/ROVEMT.. mE
8
6,3
526°56'52" W
\---SOUND WALL ON EARTH BERM
TOP OF WALL VARIES, SEE SECTIONS
b, E, F, G, H 8 8. SHEET C-2
(96)
t8
EXISTING TREES
TO REMAIN
COURT YARD
93,843 Sq. Ft. 70.4%
21,806 Sq. Ft. 16.4%
17,644 Sq Ft 13 2%
133,293 Sq. Ft. 100.00%
54,981 Sq. Ft.
38,862$q Ft.
93,843 Sq. Ft. Total Open Space
Full Development Area vs. Limited Development Area:
Full Development 1.75 Acre. (76,665 S.F.)
Limited Development 1.31 Acre. (56,628 S F.)
Total 3.06 Acre. Total Area
Limited Development
56,629 S.F. = (60.3%) of Open Space
••1!HWYI MI !A NM
1illtli�I�tll�li1lj/iiil���iTi�
smommusrumminisumigNEN
........001�....•C.
P
SA
EXISTING TREES
TO REMAIN
98)
8
(89)
2 CAR
GARAGE
�(107)
PL
SLOPE (NO BUILD)
(100)
(99)
1®
29)
® � )NIG TREES
2 CAR
ARAGE
429.63'
`------RETAINING WALL
TOP OF WALL VARIES
SEE SHEET C-1
Parking Spaces
Garage Parking Spaces 19
Driveway Parking Spaces 20
Street Parking_Spaces 8
Total 47
Parking spaces per home = 4.6
COURT
ARO
PORTICO
x mees
(TOODERF.MOVED
(1.
(,7 7)
59 m
(70)
—
XI5111"-
(13)
(15)
(48)
EXISTING TREES
2)
_ EXI6TING srW.. LINE O E RELOCATED)
689 ENG..FLANS FOR EX CATION
COURT YARD
TREETSCA
2 CAR
GARAGE
(9))
COURTYARD -
COURT
YARD
2 CAR
GARAGE
PRIVATE STREET
to
9)
EXISTING TREES & SHRUBS TO
REMAIN IN THIS AREA --7
EDGE OF PAVEMENT
NOTE
ALL CHIMNEY PROJECTIONS WILL BE 24" TYP.
• PLACER. OAKS SITE •
)uo-ar 91
2 CAR
GARAGE
COURT YARD
2 CAR
GARAG
TEXTURE INDICATES
PERMEABLE PAVERS, TYP.
EXISTING MEER
TO DE BEMOVeo
(713) (
2 CAR
GARAGE
® COURT
YARD
C6
(1 O2,) (2(3)
(22)
(Ile
DRIVEWAYS SHALL
HAVE A MIN. 17'-0"
WIDTH X I8'-0"
DEPTH, TYP.
toBReMorEDS , TO
1111O :ilr41dk'11,%
N22°47'02"E
(F, 7
SCALE 1"=20'-0"
STATE HIGHWAY 17
gyve AA'
(8
(24)
EXISTING TREES
TO REMAIN
(109)
N17°37'204E 41.75' N28°03;40"E54.26'
-�_
(G.() 8114.26' 028°03'40"E
(746) 8 i65')
(10,) (708)
Ms)
(NO BUILD)
®.
ram 0
21'-8"
71 PLC
—' _ - --..
COURT
YARD
2 CAR
GARAGE
(149) (2y/
COURT
YARD
2 CAR
GARAGE
TO BE OVER
® 196.50(14-)( 8
-
II
°
DESI3tY
GROUP,
W. •
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XLSTIM TREES
O BEREMOI.
3
6
A
z
(/45)
721
EXISTING SEWER LINE
(TO -BE RELOCATED)
SEE ENS. PLANS FOR EXACT LOCATION
68
DASHED LINE INDICATES
(E) FIESTA HOUSE OUTLINE
• '1
68
RETURN SOUND WALL
PARTIAL FLOOR PLAN
OF GRADE TO BE USE ON
ELEVATION A-B
O
z
0
GARAGE
23X 21
P acer Oaks
Lo
NO
;G
V.
Ito
05,
3, CA
2E0 /
PLAN A UPPER LEVEL
f IJ
LOGGIA
FAMILY ROOM
175 X 17
TRELLIS
BREAKFAST
10X10
PLAN A LOWER LEVEL
LOWER LEVEL 1580 S.F.
UPPER LEVEL 1290S.F.
TOTAL 2670S.F.
GARAGE 490S.E.
T_
P
SCALE: I/8" d'-0"
OUTLINE OF BALCONY
FOR ELEVATION OPTION B-B
PLAN B ® UPPER LEVEL
LOGGIA
EAMILY'ROOM
22 X 16
COURT YARN
LIVING ROOM I I
-- ---MX 13"----"-----
I I FOYER
II
ICI
KITCHEN
1LX-12
BREAKFAST
10 X 12
✓
0
n
OP
GARAGE
PDX 20
OUTLINE OF POSTS
FOR ELEVATION OPTION B-B
FRONT
PLAN B - LOWER LEVEL
LOWER LEVEL 15005.F.
UPPER LEVEL 14655.F.
TOTAL 2765S.F.
GARAGE 440 S. F.
u
R
BAN
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IRO
DESIGN
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Los O atos CA
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PLAN C LOWER LEVEL
LOWER 493 S.F.
GARAGE 2605.F.
ELDORADO STONE / FRONT ELEVATION PLAN C
MOUNTAIN LEDGE
EL DORAD05TONE /
MOUNTAIN LEDGE
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BEDROOM 2
10' x10'
MASTER 13
BATHROOM
DM
BEDB44M3
10' x 11'
BATHR00
PLAN C UPPER LEVEL
UPPER 750 S.F.
REAR ELEVATION PLAN._C
RIGHT ELEVATION PLAN C
\ EL DORADO STONE
MOUNTAIN LEDGE
W.I, GATES \ PORTICO IN
FRONT OF GARAGE
FRONT ELEVATION A-C
LOT B
DASHLINE INDICATES
GARAGE DOOR WALL
4-1
M P 1�_C_►_. P
& LiATI0N5 __ OCR 5 LOT 8
SCALL: I/8"=1'_O"
2 GARAGE DOORS
ON 24" RECESS
/ \
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RIGHT ELEVATION A-C
If
BACK ELEVATION A-C
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LEFT ELEVATION A-C
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EL DORADO STONE
RUSTIC LEDGE
FRONT ELEVATION A -A
REVISED FRONT ELEVATION, JUL), 2009.
U
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BACK ELEVATION A -A
EL DORADO STONE
RUSTIC LEDGE
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SOUND BARRIER HEIGHT 15 REFERENCED
TOTHE NEAREST BUILDING PAD ELEVATION
AS PER SOUND REPORT BY
EDWARD L. PACK ASSOC.
DATED JULY 6,1995 AND SUPPLEMENTS
DATED SEPT. 7, 2000
DATED JUNE 12, 2007 PLANT SIZE FO NEW
TREES
/- 60'-0"
NEW TREES SYMBOL
DASH LINE INDICATES
FULL GROWNUP SIZE OF
NEW TREES
(FUTURE) TYP.
HATCH TREE INDICATES
PLANT SIZE OF NEW TREES
TYP.
0.0' TO8' 0' HIGH EAROI DEEM DETYhEN WALL AND PROPERTY LIME
AS PER. TOWN OF P. GAT05 CONDIDONS OF APPROVAL ORDANCE R2081
DATED MARCH 21, 2001
PROVIDE RENDING WALL AS REQUIRES AT PROPERTY LINE
DASH LINE INDICATES
FULL GROWNUP SIZE OF
NEW TREES
(FUTURE)TYP.
EXISTING OAK
NEW TREES
COAST LIVE OAK
DASH LINE INDICATES
FULL GROWNUP SIZE OF
NEW TREES
(FUTURE) TYP.
\REWlEES
REDWOODS
DASH LINE INDICATES
FULL GROWN UP SIZE OF
NEW TREES
(FUTURE) TYP.
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HATCH TREE INDICATES
PLANT SIZE OF NEW TREES
TYP' SOUND WALL WITH VARYING
VINES ON WALL HEIGHT BERM
AS PER LANDSCAPE PLAN
TOP OF WALL
ELEVATION 319'
SITE SECTION
SCALE: VI6"= 1-0"
RETAINING WALL
FIN. GRADE
FAX ELEV. 300.65
NAT. GRADE
PAD ELEV. 30703 F.F. ELEVATION 308.53'
Q
acer Oaks
Loa
G
Ito
s, CA
U
NU
v.
05,
2107
HATCH TREE INDICATES
PLANT SIZE OF NEW TREES
TYP.
STREET SCAFE from highway 17
SCALE; 1/16"= 1',0"
\ 'NAT. GRADE
F.F. ELEVATION 308.18'
_ee 7:err � ®®�1 ®ICI
1/� . ! r M IF
HATCH TREE INDICATES
��
EXISTING OAK TREE
PLANT SIZE OF NEW TREES
TYP. CONC. SOUND WALL WITH HORZ. LAP SIDING PA ERN
SOUND BARRIER HEIGHT 15 REFERENCED
TO THE NEAREST BUILDING PAD ELEVATION
AO PER SOUND REPORT BY
EDWARD L. PACK ASSOC.
DATED JULY6, 1998 AND SUPPLEMENTS
DATED SEPT.7, 2000
DATED JUNE 12, 2007
PLANT SIZE OF NEW
TREES
F.F. ELEVATION 308.08'
SITE SECTION -INTERIOR STREETSCAPE
EXISTING TREES AND SHRUBS ON
FREEWAY SIDE OFSOUNDWALL
EXISTING OAK TREE
TOP OF WALL
ELEVATION 320.00
NEW PRIVATE
STREET
SITE SECTION
SCALE: 1/16"= 1'-0"
NEW TREES
COAST LIVE OAK
F.F..309.28
PAD ELEV.307.18 PAD ELEV.307.70
F.F. ELEVATION 309.20'
NEW TREES
COAST LIVE OAK
PAD ELEV. 308:03 PAD ELEV.30E3.92
111111111IIIIIIIIIIU
F. F. 310.42
TYPICAL SOUND WALL TO BE;
CONCRETE WALL SYSTEM BY 'WOODCRETE WOOD FENCE
TO BE PAINTED KELLY-MOORE "NORTHBOROUGH° 8 KM-592-M
NAT. GRADE
WAI-ER
1
EA�yEMENT
I
NEW ACCESS
EXISTING TREES AND SHRUBS ON
FREEWAY SIDE OF SOUNDWAIL
TOP OF HILL ELEVATION 565.0
NAT. GRADE
F.F ELEVATION 308.97 PAD ELEV. 307.27 PAD ELEV. F.F. ELEVATION 309.28' I F.F. ELEVATION 309.00'
PAD ELEV. 307.50
SCALE, 1/16"= 1'-0"
•SITE SECTIONS & STREETSCAPE •
DE
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VICINITY MAP
a1
LEGEND
TO BE CONSTRUCTED EXISTING DESCRIPTION
PROPERTY LINE
LOT LINE
EASEMENT LINE
pt LOT NUMBER
E.V.A.E. EMERGENCY VEHICLE ACCESS
EASEMENT
S.E. SIDEWALK EASEMENT
O.R.E. OVERLAND RELEASE EASEMENT
S.D.E. STORM DRAIN EASEMENT
P.S.D.E. PRIVATE STORM DRAIN EASEMENT
S.S.E. SANITARY SEWER EASEMENT
I.E.E. INGRESS EGRESS EASEMENT
P.S.E. PUBLIC SERVICE EASEMENT
20.00' MIN.
CURB AND GUTTER
CONC. VERTICAL CURB
STREETPERSOILS REPORT OR CITY DTD.
TYPICAL ON —SITE STREET SEC11ON
SEE SECTIONS ON GRADING PLAN FOR PARKING AREAS
FRANK AVE
N2S58'45"E 11=503'
FD. 1" I.P. IN
MON. WELL
V TIN T NTATIV MAP
PLA R AK
LOS GATOS
sx�B au<B
kCji
N64'55'27"E
18.81'
A.P.N. 529-14-012
AREA=0.23 AC. ±
S OF BARRING
N31.03'10®E 73.05'
N61'01'25"W
12.00'
R=80.00'
A=35'56'32"
L=50.18'
A.P.N. 529-14-067
AREA=0.009 AO. 4
N26 58'52"E - - 429.63
CALIFORNIA
PARC . RE:CC).,..'I
STATE H/GHIVA r 17
SEE SHEET 2 FOR LOTS
A.P.N. 529-14-073
AREA=2.821 AC. ±
2912
21 Nig1;45'104.58
196.50
N22 47 02E FD. 314" I.P.
8'03'40"E 54.26
IWNERS:
GENERAL NOTES
CUPERTINO DEVELOPMENT CORPORATION
1307 S. MARY, SUITE 120
SUNNWALE, CA 94087
PHONE: 408-735-9299
SUBDIVIDER: CUPERTINO DEVELOPMENT CORPORATION
I i 1307 S. MARY, SUITE 120
SUNNYVALE, CA 94087
PHONE: 408-735-9299
NGINEER: CIVIL ENGINEERING ASSOCIATES
2580 N. FIRST STREET, SUITE 290
SAN JOSE, CA 95131
(408) 435-1066
1. EXISTING ZONING: MEDIUM DENSITY RESIDENTIAL
2. PROPOSED ZONING: LOW DENSITY R-1:8P0
3. PROPOSED LAND USE: RESIDENTIAL R-1:8PD
ELEVATIONS SHOWN HEREON PER TOWN DATUM
STORM SEWER TO BE PROVIDED BY TOWN OF LOS
GATOS
7. WATER TO BE PROVIDED BY CITY OF SAN JOSE
WATERS
g. SANITARY SEWER TO BE PROVIDED BY WEST
I VALLEY SANITATION DISTRICT.
9 FIRE PROTECTION IS TO BE PROVIDED BY TOWN OF
LOS GATOS
10. GAS AND ELECTRIC IS TO BE PROVIDED BY PG&E
11. A.P.N.: 529-14-012, 067, 529-16-073
12, LOTS: 10 RESIDENTIAL, 4 OPEN SPACE
13. AREA = 3.06 ACRES
4. ALL EXISTING STRUCTURES TO BE REMOVED
BENCHMARK
INRASS DISK IN MONUMENT WELL STAMPED "LG#22" AT
TERSECTION OF BLOSSOM HILL AND OAK RIM WAY,
LEVATION = 368.68
i1. COVER SHEET
2. VESTING TENTATIVE MAP
Na 001E
BE1190N5
Q
A
0
BY
BEscBm. A.T.
DRA. C.H.
ox,JAN. 26, 10
GIEC!(m: D.D.
AMY.
CIVii Civil Engineers • Planners • Surveyors
Engineering SBo .. CAry95131 eel, 5BI1e 290
. Associates I: (108) 135-1066
COVER SHEET
PLACER OAKS
LOS GATOS CALIFORNIA
PREPARED FOR: CUPERTINO; DEVELOPMENT CORPORATION
1307 S. MAFY, SUITE 120
SUNNYVALE, CA 94087
PHONE: 406-735-9299
E0T
1
OF 2 SHEETS
a 00-116
FRAN/( All
6" VCP _ SS
fCL WATER
364.5 x
1
SSE ANLN E
N 28 58'45 " i --
47.15
-- G"--,—,._.-- Cd
of
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C.',_{__
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V
{ /
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An U5
E� n
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2
GN0 2ge. co
d5j4-----
313.5
s. . & Ps:o.E
Na
A
26"65 "W
x 312.4
UA1E
¢ • e09 SANITA Y AND STORM EASEMENT
',BI(, •178 PG. 6.2 & BK. 5178 PG. 605
x 308.6
13
S� A 308.26
14,859 S.V.
6 VALL° I
TOP/WE
30Z9 �_ 1
A SS 211 0R 5
■ UI
x 311.5
DF9CNm; A.T.
MAYrte LRN
DATL JAN. 26, 10
D.U.
6,370 S.F. x
309.2
419 S.F.
of o\
6 .M \ x309.3
11' 8'
x 310.4
_moo
53.6
x 308.8
' SEWER EASEMENT
e.693019-__—'8
6,892 S.F.
LOT
31,806 S. ,
P.S. EN.A.E. . I.E.
o
SS
4p00110R 10 BE ABANDONED
�i0 3
6
2g6
x 307.3
9,316 S.F.
,S.E. 28'
30'
NO ACCESS
:CIVii Civil Engineers • Planners • Surveyors
`EngIfeering San Jose, CA 95131
North
Associates T: (408) 435-1066
39 OR 601)
LOS GATOS
x 307.1
7e' x :306.6
SS---
5,601 S.F.
DEED TO CALTRANS NO. S.P.
3539 O,R, 601
34
STA 1E /GHl4'A Y 17
TENTATIVE MAP
PLACER OAKS
CALIFORNIA
8000N TO BE ABANDONED
4,821 S,F.
x 304.8
6,5271 S.F. TOE SWALE
302.5
x 304.4
rt.
jA!'ai-
491 -7•2
4148-3624
CORNER LOT SI
RTS SUS))
PREPARED FOR. CUPERTINO DEVELORENT CORPORATION
1307 S. MARY, I5UrTE 120
SUNNYVALE, OA 94087
PHONE 408- ,35-9299
SHEET
2
OF 2 SHEETS
90• 00-116
0
GRAPHIC SCALE
20 0 10 20
40
(IN FEET)
1 Inch c, 20 ft.
FRAN/( AVE
NC
29967 8.0, S1M
Cawnn....18f. W/ 604.T-
EXST.
RAT= ' .16
MK.295.95
44/
-
299.00
EXIST. S.D.E. &
S.&E•
20' P.C. h E. EASEMENT
1810 O.R. 327
LARGE 3x3
FLAN SLANTED
9DIFA11 SRN088RE PER
CALTRARS SPCCIFICAIHIN•
SEE DETAL ON SWEET C-3
NN..26i.0D
EXIST. SAL
151-15' MN 0 5••0.035
EAST. SAN,
IRIM. 3.21
I11V,-354.11
12 SWALE
Dry. „
CONNECT 6° AREA DRAIN
TO TOP OF STORM OUTFA .
PIPE ALM PROVIDE CLEMOUT
EX1511N0 STORM
OUTFALL
E%1511 GGINLET
L`J
II
Q 10.00' SANITARY AND STORM EA8ET8ENT
DK, 5178 PG. 802 A: BK. 0178 PO, 605
SOS'ING STOF(0) �`T -..'
LOCATION AND AUGNMENT
TO BE MIRED IN THE REED
,T BNf
PG�E N08OIFRLY UNE
PO E EASEMENT
BK. 855 PG 106 DEEDS
'MOTH NOT DEFINED OF RECORD
CORSE. SM. WL
BO81DD8N GRATE
4 T.O.
09 0.0. S01
fY-it•
W 59'-1�
(89)
OUST. SAN.L
RBA=' ,29
INY.-296.1
ST. SAL NH.
COVER
CORM. SAH. NH
16 wow COVER
EXISTING STORM ORTON
LOCATION AND ALIGNMENT
TO BE VERIRED IN THE WELD
STATE 1H/6M01Y 17
EXIST. WOOD FENCE
F (100)
F.F.=308.18
PAD=306.68
419 OAOA
2,16 OA
(17)
sg2FA0 LOT
38. OAK
348.6
(18)
?s'
Jgg OqA
(16) \ / 25 10 / (11)431.81
011.1.
(14)1
(5 / ^32 A0
AX
31 3
(10)13, (148) /3,
M1�tiO•`' _�� SY _,� '3 413p.7• 50° °'i °^~'
NN• 0 126) (92) (0o
M1 W �cAN °RaE �o ggloT
n'� _,� s��'
pek ow-0
xioiI.s6" 1 01 pN�
3B-t2 81M.
LARGE 3x3
SAME,
FLAT 88810
306.188RT.
A, .13
F.F.=308.68
g PAD=307.18
EXIST. 12°
F.F.=309.20
PAD=307,70
119), (120)
FOUR TRAC
�o•
33gB /f (21)es
GGEER INFUSE (2-0)-0-•
(118)
F.F.=310.42
PAD=308.97T
DOMING MAE. JANUARY 8, 1951
693819
TO BE ABANDONED
F.F.=308.97
PAD=307.27
601-302.68 12° 98 S
INV.=30000 fY M
INV..3CO.08 30° CUT
F.F.=309.28 :.
PAD=308,03 I
20'-1Y SIN.;
0 Sm0AN0
Rf4 .'L9A1f0 1. SAN "'T'1' , 00 1 �a i x
i a as � . ra.r,7tr °!� �..�... _c , g '•� ■ a.=.e _.� ..p __- i)(140
Aviv__`VjTE�rA� .... �{(1
(1 Owi1CC7� y. -
CONNECT 6' 088A DWI
TO 104' OF STOMA 0U1F4L
PEE 85818 PROM 0EANWT
c 11FAU. STRUCTURE PER
C601888s SPECIFICATION.
E 15TING C ANS INLET AND
CULVERT: IN .a 92.00 PER
CALTRANS RECORD DRAWING DATED
4/22/1957, 200. 60. 400D0730,
CONTRACT N0. 58-4TC24-F1)
OVERFLOW SYSLEII
3Y-1Y SW.
0 5=0.110
_ 1. TH S AREA IN THE TOWN OF LOS GATOS 15 DESIGNATED AS FLOOD ZONE:
"X" (AREAS OUTSIDE THE 1-PERCENT ANNUAL CHANCE FLOODPLAIN, AREAS
OF,1% ANNUAL CHANCE SHEET FLOW FLOODING WHERE AVERAGE DEPTHS
ARE LESS THAN 1 FOOT, AREAS OF 1% ANNUAL CHANCE STREAM FLOODING
WHERE THE CONTRIBUTING DRAINAGE AREA IS LESS THAN 1 SQUARE MILE,
OR" AREAS PROTECTED FROM THE 1% ANNUAL CHANCE FLOOD BY LEVEES.
NO BASE FLOOD ELEVATIONS OR DEPTHS ARE SHOWN WITHIN THIS ZONE,
INSURANCE PURCHASE IS NOT REQUIRED IN THESE ZONES) - (FIRM. PANEL
NO, 0608500377H DATE 5/18/09).
2. EXISTING IMPE)(VIOUS AREA = 0 ACRES
3. EXISTING PERVIOUS AREA = 3.06 ACRES
E 4. PROPOSED IMPERVIOUS AREAACRES
= 1.19 5. PROPOSED PERVIOUS AREA = 1.87 ACRES
6. THERE IS A 38.9% PERCENT INCREASE OF IMPERVIOUS AREA.
7. RECEIVING SYSTEM FOR THE STORM WATER: EXISTING STORM OUTFALL INTO
STATE OF CALIFORNIA RIGHT OF WAY (STATE ROUTE 17) ULTIMATELY INTO
VASONA RESERVOIR.
8. 48% OF THE SITE'S STORM WATER RUNOFF IS DIRECTED TO "VEGETATED
BIG-SWALES" :FOR FILTRATION. THE REMAINDER WILL BE TREATED UTILIZING
A MEDIA FILTER TRENCH.
9. THE MINIMUM BIOSWALE LENGTH WAS CALCULATED ASSUMING A MINIMUM
RESIDENCE TIME OF 7 MINUTES, SWALE LENGTH = VELOCITY * 7
MINUTES
307.88AD
1110.302.03
10. THE OVERALL STORM CONVEYANCE SYSTEM WAS CALCULATED ASSUMING
THE 10-YEAR STORM EVENT.
11. COMPOSITE RUNOFF COEFFICIENT:
WATERSHED "A"
IMPERVIOUS AREA - 14,679 S.F. (0.34 AC) - C=0.9
PERVIOUS AREA - 49,758 S.F. (1.14 AC) - C=0.25
C = (0.9 N 14,679 S.F./64,437 S.F,) + (0.25 * 49,758 S.F./64,437
S.F.) = 0.40
WATERSHED "B"
IMPERVIOUS AREA - 37,308 S.F. (0.86 AC) - C=0.9
PERVIOUS AREA - 31,584 S.F. (0.72 AC) - C=0.25
C = (0.9 * 37,308 S.F./68,892 S.F.) + (0.25 * 31,584 S.F./68,892
S.F.) = 0.60
12. ALL ROOFDRAINS TO BE DISCONNECTED AND DIRECTED ONTO
SPLASHBLOCKS.
13, THE SOUND WALLS WERE SET TO THE RECOMMENDED WALL HEIGHTS ;PER
THE REPORT BY EDWARD L. PACK ASSOCIATES, DATED JUNE 12, 2007,
14. WATER AND JOINT TRENCH UTILITIES HAVE BEEN SHOWN CONCEPTUALLY.
THE FINAL DESIGN WILL NEED TO BE APPROVED BY SAN JOSE WATER
E J UTILITYCOMPAN
IES.
AND W DINT
15. HEADWALL OUTFALL STRUCTURES TO COMPLY WITH REQUIREMENTS OF
CALTRANS STANDARD SPECIFICATIONS (MAY 2006), SECTION 51-1.02,
AND CALTRANS STANDARD PLANS (MAY 2006), SHEET 86B, P. 168.
16. ROCK SLOPE PROTECTION (RIP -RAP ENERGY DISSIPATOR) AT OUTFALL
STRUCTURE TO COMPLY WITH REQUIREMENTS OF CALTRANS STANDARD
SPECIFICATIONS (MAY 2006), SECTION 72-2.
17. ALL WORK PROPOSED IN STATE OF CALIFORNIA RIGHT OF WAY TO BE
CONSTRUCTED BY AUTHORITY OF CALTRANS PERMIT N0. 0407-6DD1688.
18. AREAS SURROUNDING OUTFALL STRUCTURES TO BE CLEARED OF ALL
EXCESS DEBRIS TO PROVIDE FOR ADEQUATE FUTURE STORM RELEASE
INTO EXISTING STORM CHANNELS.
15
OAK(23)
(103)
(115)
13'-12° SUA.
®m
(104)
'SAN. 1AT.
1-0020 N91
(105)
(
,6" 0 4 (1D9)
(1®)
II1 I (15„ I64'0AK
I(152)344.6
I I ��
1I EASEM TK. AS847
WER
1PG. 494
11
(149)
(26)
W 303.23
WATER
' SANITARY I
ENT TO
F.F.=310.00
PAD=308.50
I IF, ,-;':.,.0
:PAElN3196?90
i
1
(145)
e D, "
j3N 12'CK 1N'P'°
®8 OLA
2) JOA'A
c
�CO 142 F DAARi r0. Y I.P.
35 I). II k"
TO BE CONSTRUCTED
•
'•
W
JT
siV
I6.o
it
LEGEND
EXISTING
-0-'
(76)
(73
e OAK
305.1 TOP
DESCRIPTION
PROPERTY LINE
CENTER LINE
CURB, GUTTER, SIDEWALK
AND DRIVEWAY
SANITARY SEWER AND MANHOLE
STORM SEWER AND MANHOLE
HOODED INLET
WATER MAIN
JOINT TRENCH
SERVICE
FIRE HYDRANT
POWER POLE
ELECTROLIER
LATERAL CONFINEMENT BARRIER
(AS PROPOSED BY GEOFORENSICS, INC.
REPORT N0. 207070 DATED JULY 2, 2007)
EXISTING TREE
TO BE REMOVED
TREE NUMBER PER THE
ARBOR RESOURCES REPORT
DATED APRIL 18, 2008
APE IR,. 4 . ' '
NO
OA
PENSIONS
BY
A
A
„„,000D: A.T.
LRN
OAT& FEB. 17, 10
CHECKED: D.U.
CIVIL Civil Engineers • Planners • Surveyors
EngPneering 2580JNorth CA e5131Mel 1eet, Suite 290
Associates T: (408)435-1066
LOS GATOS
UTILITY PLAN
PLACER OAKS
CALIFORNIA
PREPARED FOR CUPERTINO DEVELOPMENT CORPORATION
1307 S. MARY §UITE 120
SUNNYVALE, pa 94087
PHONE: 408-735-9299
STUFFY
CA
OF SHEETS
JO, HD. 00-116
PRONOE e° 40 OPaR40 AT BASE
819
STEEL FAMUM
SORB RI
OU1FAu. S1RUCTIM6 PER
CRLIRMIS 9'EOIRCATRRI.
9N.e297.
SS9� 86TA$00 0191EET 0-3
EXISTING INLET
x 312.4
„ 313.5
\/
EXIST. WOOD FENCE
WiFALL STRUCTURE PER
CALTRANS 0E0RCATRIN.
awl WI 9R2T C-
SgNiDWAIL ®25 ON CENTER
EXISTING CALTRANS INLET AND
R
AE1CULVERT: INV.292 (PEM,
TER EAff CALTRANS RECORD o. 4oNNG. DATED
4/22/1957, DOC, NO. DR 4000p730,
CN TRACT-ND.-584P
STATE HIG i''}PAI' 17
•
x 310.4
\Z,
�o A2%
099
309.4
EARTHWORK
ENTRY ACCESS ROAD
LOWER SUBDIVISION ROAD
HOUSES
DRIVEWAYS
LOT OPEN SPACE
SUB —TOTAL
CUT TO FILL
15% SHRINKAGE
TOTAL
h Q
CUT I FILL
(CY) i(CY)
1355
5961
482)
79 1
328
240E
_I
—I
1270
11306
1184
13428
,5188
12782
1417
3199
ij/4' I.P.
LEGEND
EXISTING TREE
TO BE REMOVED
(76) TREE NUMBER PER THE
ARBOR RESOURCES REPORT
DATED APRIL 18, 2008
30� NOTES•
1, SEE SECTIONS ON SHEET C-3
2. ALL RETAINING WALLS BEING INSTALLED ALONG
EASTERLY PROPERTY LINE FOR PRIVATE STREET
SHALL BE CONSTRUCTED AND SHORED ON SITE ONLY.
3. TOP OF SOUNDWALL IS BASED UPON :12.00' ABOVE PAD
ELEVATION OF 307.00' 0 LOT 3 TOP OF WALL = 319.00
4. ALL WORK PROPOSED IN STATE OF CALIFORNIA RIGHT OF
WAY TO BE CONSTRUCTED BY AUTFIORITY OF CALTRANS
PERMIT N0. 0407-6DD1688 1
LATERAL CONFINEMENT
BARRIER (AS PROPOSED
BY GEOFORENSICS, INC.
REPORT N0. 207070
DATED JULY 2, 2007)
NO
BA
RENSW1S
BY
A
0
A.T.
3RAON: LRN
DA,E, FEB. 17. 10
aIECRED• D.U.
6 ,
FC
Englineering
ivil
Associates
Civil Engineers • Planners • Surveyors
2580 Rath first Street, Suite 290
Son Jose, CA 95131
T: (408) 435-1066
GRADING AND DRAINAGE PLAN
PLACER OAKS
LOS OATOS
( AIiFfNadiA
PREPARED FOR CUPERTINO EVELOPMENT CORPORATION
1307 S. MARY, 1JITE 120
SUNNYVALE, OA 94087
PHONE: 408-78S•9299
C-2
OF SHEETS
PROJECT ENTRY ROADWAY
SCALE: 1"=10'
TYPICAL SECTIONS
TOP-3 9.00
315
310 -•--- - -- - 2'
12" CONC. SWALE
305 - 30'00 6
302.501W
300
RETAINING
WALL
2BB,2' Bid
295
SECTION
338
337
336
SOUNDWALL
305.60 OW
4X
_ 320- --
315
310 -
12" CONC. SWALE
305.00TW
305
300
J
SCALE: 1"=5'
GUARD RAILx
336.62
PIER .SUPPORT
FOR WALKWAY
335 i
334 ''-' - ''- �~\ , XIST. GROUND
SECTION •
LIR._.MIN,
ON STAIRS (TYP.)
SCALE: HORIZ. ("=10' VERT. 1"=
SEE NOTE 2
SEE NOTE 4
4-
THICK
PIMtrlPas
ettleelitNitleet
331
zee 52,
329 PIER SUPPORT
FOR WALKWAY
328
TO
50UNDWALL
12" FLAT
WARETAINING
LL i
i
305.001C
30 .50k
__EXIST. GROUND
SECTION
SCALE: 1"=5'
363N-N-
362 _____-17051:'➢ROUND��-',-
4'-6" MIN. SIDEWALK \�
YAM AT PRIVATE
361 -STREET-MR)- I I-----
360,49TC
327 ._.
SECTION
SECTION
SCALE: HORIZ. 1"=10' VERT. 1"=2'
4'-0" CIR. MIN,
ON STAIRS (TYP.)
/ 330,00TW
RETAINING
WALL
��-EXISi. GROUND
SCALE: HORIZ. 1"=10VERT. 1"=2'
Zv
HEADWAO-
om
NOTES
1. .HEADWALL OUTFALL STRUCTURES TO COMPLY WITH REQUIREMENTS OF CALTRANS STANDARD SPECIFICATIONS (MAY 2006),
SECTION 51-1.02, AND CALTRANS STANDARD PLANS (MAY 2006), SHEET 86D, P. 168.
SOILS AROUND HEADWALL (ADJACENT SIDE SLOPES AND TOP OF BANK) TO BE COMPACTED AND STABILIZED WITH
EROSION CONTROL BLANKETS PER CALTRANS STANDARD SPECIFICATIONS (MAY 2006) SECTION 20.
3. ROCK SLOPE PROTECTION (RIP -RAP ENERGY DISSIPATOR) AT OUTFALL STRUCTURE TO COMPLY WITH REQUIREMENTS OF
CALTRANS STANDARD SPECIFICATIONS (MAY 2008), SECTION 72-2.
4. RIP -RAP FOR OUTFALL TO BE CONSTRUCTED WITH N0. 2 BACKING AND PLACED IN CONFORMANCE VATH METHOD B
PLACEMENT PER CALTRANS STANDARD SPECIFICATIONS (MAY 2006), SECTION 72-2,02.
5. ROCK SLOPE PROTECTION (RSP) FABRIC TO BE INSTALLED PRIOR TO RIP -RAP PER CALTRANS STANDARD SPECIFICATIONS
(MAY 2006), SE0110N 72-2.025.
320
315
12" CONC. SWALE
310307.fieTW
305_5Di
305
RETAINING WALL
324 \\.
323
EXIST. GROUND
322-
PIER SUPPORT
FOR WAU<WAY
321. _....
320
EXIST. GROUND
300
-TOP=319.00
12' FLAT
305.99TC
305.49R
SECTION
SCALE: 1"=5' E
361 \.- I
EXIST. GROUND ---A\
360 4'-6" MIN. SIDEWALKS
STREET A(RP PATE
359 35B.49TC
358
357 ' --
358.59B W\
SECTION
SCALE: HORIZ. 1"=10' VERT. 1"=2'
4'-0" CLR. MIN.
ON STAIRS (TYP.)
GUARD RAIL
SECTION
SCALE: HORIZ. 1 "=10' VERT. 1"=2'
4'
RIP -RAP APRON
SEE NOTE 4
SLOPE VARIES
3'
SPILLWAY
320 •
RETAINING
WALL
319
318 -
317
316-
SECTION
SCALE: HORIZ. 1"=15' VERT, ('=2'
320
315
12" CONC. SWALE
310 308.38TW
RETAINING WALL
305
EXIST. GROUN01i• 30450t
300
357 \
\,,..-EXIST. GROUND
356 ti_____,
4'-6" MIN. SIDEWALK
VADTH AT PRIVATE 1 \
355 STREET- (-TIT) I \
54.50TO -- \
354
353 -
SECTION
SCALE: 1"=5'
.60B
353.00B
SECTION
SCALE: HORIZ. 1"=10' VERT. 1"=2'
2 MAX.
FRONT
antrovolow
'i�
. a
ROCK SLOPE PROTECTION FABRIC
SEE NOTE 5
STORM OUTFALL STRUCTURE
SCALE: 1 "=2'
I9' CUT-OFF WALL
6-14 REBAR (CLUSTER) •
0 UT -OFF WALL
SECTION
15"0 OUTFALL
CULVERT PIPE
320.50
\EXIST. GROUND
4'-0" CLR. MIN.
\ ON STAIRS (TYP.)
31732
4-#4 REBAR (CLUSTER). TO
B(210GE TOP OF CULVERT PIPE
REBAR 012" 0E. EA. WAY
(TYP. FOR BASE HEADWALL AND
AND OINGWALLS)
_\
318
RETAINING
317 WALL_
316
315 -
314
(
353
352.49TC
352
320 -
315
12' CONC. SWALE
310 301266TW
RETAINING
WALL
305
300
4'-8" MIN. SIDEWALK WIDTH
AT PRIVATE STREET (TYP.)
351 --
EXIST. GROUND --TA
350 \9
349
Ix GUARD RAIL
352.69
SECTION
SCALE: HORIZ. 1"=10' VERT. 1"=2'
318.00
4'-0" CLR. MIN.
ON STAIRS (TT.)
315.00
v-EXIST. GROUND
SECTION
SCALE: HORIZ. 1 "=10' VERT. 1"=2'
PIER SUPPORT
FOR WALKWAY
317
RETAINING
316 -WALL
315
314
313 - ----
3037Of_,/
6.68'
12" FLAT
;1
-TCP=31i9.D0
SO INDWALL
5.W
309.72
307,17TC
306.67A
"2o47LI
'EXIST. GROUND
350
349
345
EXIST. GROUND\
347 \
SECTION
SCALE: 1"=5'
4'-6" MIN. SIDEWALK WIDTH
AT PRIVATE STREET (17P.)
08 GUARD RAIL
3 9.18
346
349.08TO \
SECTION
SCALE: HORIZ. 1"=10' VERT. 1"=2'
•
PIER SUPPORT
t FOR WTLKWAY
o
F
-1.
01W
4'-0" CLR. MIN.
ON STAIRS (TYP.)
14.00
_ -EXIST. GROUND
SECTION
SCALE: HORIZ. 1"=10' VERT. ('=2'
316
315
RETAINING
1 WALL
314---
313 - _.
313
SECTION
SCALE: HORIZ. 1'=10' VERT. 1"=2'
320
I
S0
315 ---
310
12" CONC. SWALEj-
306.20TW i '
REfAININ
WALL
305
30�70�/
300
345
344 --GUARD-'RAIL=
343
342
341
7
12" FLAT
1
TOP=319.00
F.F.=309.0D
P - D.=307.50
BASE PAD ELEVATION
SEE NOTE THIS SHEET.
EXIST. GROUND
SECTION
SCALE: 1"=5'
(
i 4.-0" CLR. MIN.
"ON-STAIRS'(TYP.)
343.50
-PIER-sue0DRT
FOR WALKWAY
--EXIST..OROUND
SECTION
SCALE: HORIZ. 1"=10' VERT. II"=2'l `d /
\ 315.001W
4'-0" CLR, MIN.
ON STAIRS (TYP.)
EXIST. GROUND
CLOIMACICII C.C.S 'MAT MC WC, AlIZ,Ct
D.
DATE
flENSPYS
� 06150 A.T. 0, JAN, 26, 10
00440. LRN gl061ED; D.U.
Civil Engineers • Planners • Surveyors
Engineering Son Jose,. CA 05131
116,1 Slro,I, Suite 280
Son Jose.
Associates T: (406) 435-1066
R-\PROJECT\2000\00116\PD\00116PD C3 SF.C.dwg Jun. 25, 2010
LOS GATOS
SECTIONS
PLACER OAKS
CALIFORNIA
PREPARED FOR: CUPERTINO DEVELOPMENT CORPORATION
1307 S. MARY,I8UITE 120
SUNNYVALE,A 04087
PHONE 408-7 6-9299
SHEET
C =3
OF SHEETS
00-116
24 12424"
1:1 MAX. 1:1 MAX,
1/2' GRAVEL
WRAPPED IN
MIRAFI 160 FILTER
FABRIC
18' SANDY LOAM
0" MIN VEGETATION
61 PERF. PIPE
NOTE:
13I0-SWALE WILL NEED TO
BE MAINTAINED AS NEEDED
TO MEET DESIGN FLOWS
AND FILTRATION RATE
SECTION B
TYPICAL BIO-SWALE
FRANI( A I/4
ROADWAY 4
PERMEABLE
PAVER MEDIUM
SUNOL TYPE
SAND
MPJA FILTER TRENCH
797.32 .0. SAN
20Q.67 B.D. SIN
CONSi. 0 W/ DOLT-
1 CRAZSI11 E S COVER
M1-209.73 12* IN (SE)
MW-20000 16' OUT (NW)
yam 303
M.W,EO
RAT SKATE
OUIFALL 210001IME PER
CJ4.TRANS SPEOFICA0ON.
0-3
.00
VERTICAL CURB
6" PERFORATED PIF1E
FABRIC WRAPPED \\
DRAIN ROCK
L:0134EOT 0• AREA DRAM
TO TOP OF PPE AHD PRO0VpE�01 GOUT
SITE MAINTENANCE;
)r PAST -CONSTRUCTION CONTINUING SITE MAINTENANCE. IS REQUIRED
Ily( TO REDUCE THE AMOUNT OF POLLUTANTS THAT REACH THE SWALES.
1. VACUUM/SWEEPING OF PARKING LOTS AT LEAST EVERY MONTH.
2, OIL AND OTHER SPILLS SHALL BE REMOVED WITH DRY
ABSORBENT MATERIAL.
3. MOW OR CUT GRASS SWALES TO 4-INCH HEIGHT AT LEAST 3
TIMES PER YEAR: PRIOR TO FEBRUARY 15, JUNE 15 AND
OCTOBER 15. COLLECT AND PROPERLY DISPOSE OF CUTTINGS.
4. VACUUM SWALES TO REMOVE SEDIMENT, AS NEEDED. (MINIMUM
ONCE EVERY YEAR IN JUNE).
5. MAINTAIN A DENSE, HEALTHY GRASS COVER IN SWALES.
6. MINIMAL APPLICATION OF FERTILIZERS. +�. °a'>'►"
7. INSPECT SWALES FOR STANDING WATER AND CORRECT ♦
DRAINAGE.
_.%^ (1\
/
.MH'\\\_(4)j,6_��sL/\\/ \:
.\+.0-
IN.63.3s \/ /\•Sso�
1I T-6' , i./
I\ '
Z6 / WATER�SHED!A �\
I (GB) V, 11 1�-- 0
ir
/(/\Uy / �\O I\
s„(0, \ \, y,
I , \I
NUMERIC BIDNO SUMMARY FOR BIOSWALE
DRAINAGE AREA
A
SHE AREA
(ACRE)
,ADJUSTED
VALUE
0A0
0NENSITY
015110
0.2
131,111 DESIGN FLOW,
Q(CF8)
0.118
MIN. REQUIRED BOTTOM
WIDTH, WETTED
PERIMETER, PER
MANNINGS EON. (FT)
027
ACTUAL. DEPTH
APPR0NMA1E0
WO
2.7
PROPOSED SWALE
WIDTH, 2 FEET
MINIMUM WEN 1:1
SLOPES CELL
MANNUM VELOCITY, V
(FPS)
0,24
MW GRIMED SWALE
LENGTH (FT)
220
PROPOSED
SWALE
LENGTH FOR
PO ZONNG
00
220
MEETS
MINIMUM
BOTTOM WID111
AND AND
LENGTH
REQUIREMENT
YES
MAM•IENNiCE
SUMMARY
MINIM G0ASI
SW0000I0110V 4-
INCH HEgH(. SEE
SHEET4.2'FOR
MAIN1ENAi10E
SCHEOUIE.
I 1.6E
0.60
SEE SEPARATE MEDIA FILTER CALCULATIONS ON THIS SHEET
' CONVEYANCE OF 10 YEAR
STORM. 010SWALE
TOTAL(ACRE)
P
ADJUSTED C.
VALUE
0.40
STORM
INTENSE,'
(IWHR)
21
Q.10YEAR(CFS)
1.237
CAPACOV 0, 16' DEEP
M01MUM(CF8)
6.052
CAPACITY OE
BIOSWALE MEETS
10YEARSTORM1.4e
YES
LSO
1 0.60
21
Ls.
WA
WA
RUNNOFF COEFFICIENT, 0'VAWE
CALOULAl1JN
IREAIMENTAREA
TOTAL (ACRE)(0.6)
17RUSCAPE
BREA'OVALUE
LANDSCAPE
A11FA'G.VAWE
(0.26)
ADJUSTEDC-VALUE
A
1Ae
0A06
- 02216
0.40
B
1.60
0.771
0.131
0.00
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VOLUME BASED BMP DESIGN
(CALIFORNIA STORMWATER QUALITY HANDBOOK VOLUME BASED METHOD)
• MEDIA FILTER TRENCH BMP DRAINAGE AREA: 1.58 AC. (68,892 S.F.)
• UNIT BASIN STORAGE RAINFALL VOLUME: 0.33" (80% CAPTURE RATE -
FIGURE :2A FOR 48 HR. DRAWDOWN)
TOTAL AREA FOR WATERSHED B: 68,892 (1.58 AC.)
IMPERVIOUS AREA - 37,308 SF (0.86 AC.)
PERVIOUS AREA - 31,584 SF (0.72 AC.)
PERCENT OF TOTAL SITE IMPERVIOUS: 37,308/68,892 = 54%
SOILS CLASSIFICATION: CLAYEY SANDS AND GRAVEL PER GEOTECHNICAL REPORT
PREPARED BY: GEOFORENSICS, INC. REPORT NO. 207070 DATED JULY 2, 2007,
MEAN ANNUAL PRECIPITATION PER SCVWD MAP: 24"/YEAR
MEAN ANNUAL PRECIPITATION REFERENCE GAUGE - SAN JOSE AIRPORT: 13.9"/YEAR
UNIT BASIN STORAGE RAINFALL VOLUME CORRECTION FACTOR: 24'/13.9" = 1.73
ADJUSTED UNIT BASIN STORAGE RAINFALL VOLUME: 1.73 * 0.33 = 0.57
BMP STORMWATER TREATMENT VOLUME: (68,892 S.F.) (0.57") / 1712" = 3,272 C.F.
FILTRATION TRENCH SURFACE AREA (SA)
SA = TREATMENT VOLUME = 3,272 C.F. = 1,091 S.F.
(INFILTRATION RATE)(DRAW DOWN TIME) (0.5"/HR)(1'/12772 HOURS)
* INFILTRATION RATE FOR THIS PROPOSED APPLICATION IS 0.5"/HR
ACTUAL' SURFACE AREA = 1,340 S.F.
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NOTES F
1. THIS AREA IN THE TOWN OF LOS GATOS IS DESIGNATED AS FLOOD ZONE: "X" (AREAS
OUTSIDE THE 1-PERCENT ANNUAL CHANCE FL00DPLAIN, AREAS OF 1% ANNUAL CHANCE
SHEET FLOW FLOODING WHERE AVERAGE DEPTHS ARE LESS THAN 1 FOOT, AREAS OF 1%
ANNUAL CHANCE STREAM FLOODING WHERE THE CONTRIBUTING DRAINAGE AREA.IS LESS
THAN 1 SQUARE MILE, OR AREAS PROTECTED FROM THE 1% ANNUAL CHANCE FLOOD BY
LEVEES. NO BASE FLOOD ELEVATIONS OR DEPTHS:ARE SHOWN WITHIN THIS ZONE.
INSURANCE PURCHASE IS NOT REQUIRED IN THESE ZONES) - (FIRM, PANEL NO.
08085C0377H DATE 5/18/09).
2. EXISTING IMPERVIOUS AREA = 0 ACRES (VACANT LAND)
3. EXISTING PERVIOUS AREA = 3,06 ACRES
4. PROPOSED IMPERVIOUS AREA = 1.19 ACRES I
5. PROPOSED PERVIOUS AREA = 1,87 ACRES
6. THERE IS A 38.9% PERCENT INCREASE OF IMPERVIOUS AREA.
7. RECEIVING SYSTEM FOR THE STORM WATER: EXISTING STORM OUTFALL INTO STATE OF
CALIFORNIA RIGHT OF WAY (STATE ROUTE 17) UL MATELY ONTO VASONA RESERVOIR.
8. 48% OF THE SITE'S STORM WATER RUNOFF IS DIR CTED TO "VEGETATED BID-SWALES" FOR
FILTRATION. THE REMAINDER WILL BE TREATED UTILIZING A MEDIA FILTER TRENCH.
9. THE MINIMUM BIOSWALE LENGTH WAS CALCULATED ASSUMING A MINIMUM RESIDENCE TIME
OF 7 MINUTES, SWALE LENGTH = VELOCITY * 7 MINUTES
10. THE OVERALL STORM CONVEYANCE SYSTEM WAS CALCULATED ASSUMING THE 10-YEAR
STORM EVENT. (DATA FROM SANTA CLARA COUNTY DRAINAGE MANUAL-2007)
11. STORMWATER TREATMENT VOLUME FOR WATERSHED "8" WAS DERIVED FROM THE CASQA
HANDBOOK - APPENDIX D - SAN JOSE AIRPORT.:
12. COMPOSITE RUNOFF COEFFICIENT:
WATERSHED "A"
IMPERVIOUS AREA - 14,679 S.F. (0.34 AC) - C=0.9
PERVIOUS AREA - 49,758 S.F. (1.14 AC) - C=0.25
C = (0.9 * 14,679 S.F./64,437 S.F.) + (0.25 * 49,758 S:F./64,437 S.F.) = 0.40
WATERSHED "B"
IMPERVIOUS AREA - 37,308 S.F. (0.86 AC) -
PERVIOUS AREA - 31,584 S.F. (0.72 AC) - C=0)25
C = (0.9 * 37,308 S.F./68,892 S.F.) + (0.25 * 51,584 S.F./68,892 S.F.) = 0.60
13. ALL ROOFDRAINS TO BE DISCONNECTED AND DIRECTED ONTO PLASHBLOCKS.
LEGEND
`-"I AREA SUBJECT TO WATER TREATMENT
e -1
L_a_J
J
PERVIOUS AREA EXEMPT FROM TREATMENT
PER CALIFORNIA STORMWATER HANDBOOK
GUIDELINES.
WATERSHED "A" 64,437 S,F., 1.48 AC.
IMPERVIOUS AREA = 14,679 S.F. (0.34 AC)
PERVIOUS AREA = 49,758 S.F. (1.14 AC)
(0.58 AC EXEMPT FROM TREATMENT)
(0.90 AC SUBJECT TO TREATMENT)
WATERSHED "B" 68,892 S.F., 1.58 AC.
IMPERVIOUS AREA = 37,308 S.F. (0.86 AC)
PERVIOUS AREA = 31,584 S.F. (0.72 AC)
(0.23 AC EXEMPT FROM TREATMENT)
(1.35 AC SUBJECT TO TREATMENT)
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\PROJECT\2000\OOHS\PD\001I8Po C4 SW.DWG Feb 16, 2010
Civil Civil Engineers • Planners •.Surveyors
Engineering 2000Jo o)h 0 1) Street, Suite 290
A s s O c I a 1 e s T. (408) 435-1066
STORMWATER MANAGEMENT FiL.AN
PLACER OAKS
LOS GATOS
CALIFORNIA
PREPARED FOR: CUPERTINO DEVELOPMENT CORPORATION
1307 8, MARY) SUITE 120
SUNNYVALE, PA 94087
PHONE: 408-736-9299
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