HomeMy WebLinkAboutAgenda Bill 3EPart2 06/21/2010
ATTACHMENT 4
•~~.` Additional Development Capacity
(Residential Units)
A'DDITiONAL ANNEXATION AREAS
LD. Number .(See Table 4)
Additional Development Capacity
(Residential Units)
Figure 9 '~
Project Additional . ®eveloprr~ent Areas
Sunny 5iope pssessmenr o~stnct tk wnnexauon city of r~etawma;
Final EIR
IV.A. Land Use
Page 56
Sunnyslope Assessm'ent' District
City oY Petaluma
March 17, 1.989
Table 3
ASSUMED ADD1TIONAI_ RESIDENTIAL DEVELOPMENT CAPACITIES:
PROPOSED ~-SSESSnAEBVT DISTRICT
r Assessment Assumed Assumed
r Dlstrlct Existing Additional Total Future
r Ownerships° Acres Dwellings Capacltvb Dwelling Units
G ~~ ~ - - - . <-f .
r 41 2.0 1 3 4
r 44, 45, 64, 71 6.5 1 3-7 4-8
r 52 1.0 1 1 2
r 69 - 1.8 1 2 3
r 72, 73 5.5 1 9 10
r 93 1.4 1 1 2
r 92, 95 1.3 1 2 3
r 122 1.6 1 2 3
r 125, 136 5.2 2 8 10
r 126, 127, 128, 131 3.5 1 4 5
r 132 3.4 1 5 6
r 133, 134 2.3 1 3 4
r .135 1.1 1 1 2
r 137 6.0 1 9-10 10-11
r 138 5.7 2 5-7 7-9
r 141 10.4 1 8-11 9-12
r 142 1.0.0 1 9-11 10-12
r 143 8.6 1 12 13
r TOTALS
78.6 21 88-100 109-121
SOURCE: Wagstaff and Associates, October 1988
a See Figure 9.
r ° Current assignment by city staff based on evaluation of site development suitabilities.
r Range given for parcels 44, 45, 64, 71, 137, 1.38, 141, and 142 reflects the difference
r between: the latest city evaluation (1989) and the September 17, 1986 correspondence
r from the county to property owners. See explanation 'in EIR text.
a
a
,~
f~
302
a
a
r
r
~;
r
r
r?.
Sunnyslope Assessment District
City -of' Petaluma
March 17, 1.989
Table 4
F-SSUMED ADDITIONAL RESIDENTIAL DEVELOPM
POSSIBLE ADDITIONAL ANNEXATION AREAS
Additional
Annexation Existing
Area' Acres Dwellings
Area 1
A
B
D
G
Subtotals
Area 2
None
Area 3
~~ .
U
Subtotals
TOTALS
final; EIR
IV.A. Land Use
Page 57
ENT CAPACITIES:
Maximum Allowable Capacity
Assumed Assumed
Additional Total Plan
Capacityb Dwelling Units
2.4 2 2 4
2.1 2 2 4
0.6 0 1 1
0_2 0 .1 1
5.3 4 6 10
1..1 1 1 2 ,
7.4 2 6 8
19.5 0 14 14
28.0 3 21 24
33.3 7 ~27 34
SOURCE: Wagstaff and .Associates, October 1.988
a See Figure 9.
b Assumed development capacity determined by EIR .consultant and city staff based
upon parcel configurations, slope conditions, creek alignments, and access.
302
. 3
ATTACH IVi ENT 5
Pa~kef: Nest I~~lls ~e~e
PETAI.UIVIA GEIVERAI~ PLAN 2025
TOPIC DISCUSSION/P®SITI011I PAPER
Location/Topic: Lands of Asbell, Irwin/Neuwboer,. Foley, and Mills. -216
Sunnyslope Avenue, 1309 D Street, 13.11 D Street and 1315 D Street. APNs
019-130-011, 019-130-046, 01-9-130-047, and 019-130-041. Staff may
recommend the addition of APN 0'19-130-043 (Lands of Fraley) which currently
has two homes on less than one acre, thereby identifying. the property as non-
conforming. The attached map exhibit .indicates the five parcels; lands of
Fraley is identified with an asterisk (~).
If this request had been received before conclusion of the public process of
reviewi-ng the. Land Use and Mobility Alternatives Report, it would have been
incorporated in the Draft Map.
Request: The property owners of the four properties first listed above have
requested a land use designation of Low Density Residential- (2.1 - 8.0 units
per acre) to allow a minimal amount of infill development to possibly occur,
consistent with the size of the surrounding lots (see attached correspondence).
Existing. General Plan; Suburban (,6 to 2.0 dwellings per acre). 'These parcels
are included in the Sunnyslope PUD but were excluded from the assessment
process as they do benefit from the public improvements undertaken by that
implementation of the. Sunnyslope Assessment District.
Draft hand Use 1lRa Ve Low Residential (:6 to 2.0 dwellings per acre)
P~ rY
Background: The Draft General Plan 2025 land use map recommended a
change in .designation to Low Density Residential. (2.1- 8.0 dwellings per acre)
for all parcels to the north, east and west of these parcels. The two parcels
fronting on Sunnyslope Avenue are the only two with a lower density
designation than .the remainder of the street frontage. These five parcels were
originally recommended for Very Low Residential (:6 to 2.0 dwelling. per acre)
based solely on the existing General Plan designation. Given their shape: and.
deep dimensions they lend themselves well to a possible parcel map for small
infill development.
Alternatives:
a. Direct staff to amend land use designation of four, or five, parcels to
Low Density Residential. (2.1 to 8.0 dwellings per acre).
b. Direct staff to retain the existing Very Low Residential designation.
Recommendation: Direct staff to amend land use designation of five
(including Lands of Fraley), parcel's to Low Density Residential (2.1. to 8.0
dwellings per acre), Staff will. contact the Fraley property representatives to
ascertain their support.
Attachments: Letter from property owners with exhibit
Location exhibit ~ 1
ATTACHMENT 6
~s~at Storm Caen t
~rati®~a and ai~nt~nac r®ra
for
Sunny ®eve~p~nt
at
1311 "D" Street and
216 Sunny Slope Avenue
Petaluma, California
APN's 019-130-048, 019-048-049 and 019-130-011
Prepared for:
Sunny® ®eve6opment, LLC
By:
Steven J. Lafranchi and Associates, Inc.
140 Second Street, Suite 312
Petaluma, California 95952
(707) 762-3122
System Overview..:
The lands covered by #his private storm drain operation and. maintenance plan include
Parcel 1 of Parcel Map 364, fronting on D Street; the SunnyD Development, a 4 parcel
subdivision of a portion of .Parcel 2 of Parcel Map 364 and 'the designated remainder of
said Parcel 2 of Parcel Map 364 that fronts on Sunny Slope Avenue; all within the City
of Petaluma; California. The private storm drain system consists of individual lot
drainage swales, storm drain inlets with filter inserts. to capture and treat the storm water
runoff, an underground piping system with on-site detention capacity and connection to
the existing curb inlet and the pub is storm drain system in Sunny Slope Avenue.
Each of the on-site drain inlets will be equipped with a "Fossil-.Filter -Silt Basin" as
manufactured. by KriStar Enterprises, Inc., storm water filter insert.. The filter will trap
debris, sediment and treat runoff for the removal of petroleum hydrocarbons as it
passes through the `filter''media.
Each of the four new parcels created by the, SunnyD Development subdivision slopes in
a northeasterly direction. Drainage swales near to and paralleling the easterly parcel
lines of each parcel capture surface runoff and convey'tlie storm water to a drain inlet
with filter inserts. The captured and treated storm water is then piped northerly in an
underground piping system that connects to the existing curb inlet in Sunny Slope
Avenue.
The northerly portion of the underground piping across the `designated remained' parcel
is~`oversized' (approximately 110-feet of 36-inch diameter pipe). The additional capacity
of this section of pipe is used for on-site storm water detention. The release rate of the
detained .runoff is controlled by a structure at the end of the on-site piping.
Inspection Program:
The inspection program shail:entail a field observation of the function and performance
of all storm drain facilities. The storm .drain facilities .shall be reviewed on a quarterly
basis for the first year and semi-annually (on April 1 S' and October'1 St) thereafter.
Inspection of the storm drain system shall include preparation of an Inspection Report.
An Inspection Report shall 6e prepared for each field .inspection.
1. The Inspection Report shall include, but not limited to, the following:
a. Observation of the site for evidence of erosion.
b. Inspection of the drainage swales with regards to erosion; slope stability,
debris and vegetation.
c. Inspection ofthe drain inlets. (e.g., condition, operation, siltation., debris,
blockages, etc.)
d. Inspection of the drain inlet filter inserts. (e.g., condition, siltation; debris.,
condition offilter media, etc.)
e. Inspection of the underground piping. (e.g., condition, operation, siltation,
debris, blockages, etc.)
33
f. Inspection of the.. connection and outlet into the existing curb inlet on the
south side of Sunny Slope Avenue. (e.g., condition, siltation, debris,
blockages, etc.)
g. Inspection and observation of on-site detention piping (`oversized' storm
drain piping) and the 'outlet flow rate regulating' structure. (e.g., condition,
operation, siltation, debris, blockages, etc.)
h. Identify storm drain system deficiencies.
i. List maintenance operation required to eliminate system deficiencies.
j. List maintenance .performed to restore system functionality.
k. Evaluation of corrective measures effected.
2. Upon completion of the field observation, inspection, maintenance functions
and preparation of the Inspection Report, a copy of the report shall be
submitted to the City Engineer for the City of Petaluma.
Sediment and Pollution Management. and Control:
1. The drain inlet filter`inserts shall be inspected and maintained in accordance
with the manufacturer's recommendations.
a. Debris and sediment will be removed as part of each inspection cycle.
b. Filter media shall be removed and replaced per the manufacturer's
recommendations.
c. Disposal of exposed filter media shall be in accordance with local
regulatory agency requirements to ensure compliance with all local, state
and federal environment laws, rules and regulations.
2. Removal of accumulated sediment in the 'detention pipe' portion of the
underground piping system within the `remained parcel' shall occur when the
depth of the sediment is equal to or greater than 1" (0.083') in depth.
a. All sediment shall be trapped on-site during the removal process. No
sediment shall. be allowed to `wash' downstream.
b. Storm drain facility cleaning and/or sediment removal shall be by self-
, contained `vacuum truck', hydro-flushed to a vacuum or pumper truck or
other method approved by the City Engineer.
3. If removed sediment is to be stored or dispersed (spread) on-site it shall be in
accordance with City, State and' Federal best management practices and in a
manner that will inhibit erosion in the future.
4. If sediment is to be disposed of off-site said disposal shall be coordinated with
the City Engineer prior to the material. leaving the project site. The party
performing the sediment removal operation shall .obtain all necessary permits
and pay all required fees to all governing agencies having jurisdiction.
5. All significant site erosion shall be noted and corrected. Erosion repairs shall
include all work .necessary to prevent or inhibif erosion in the future.
6. Sediment_ shall be removed from storm drain inlets when the depth of sediment
reaches 1-inch (0'.08').
3y
Insect Control:
1. The Marin-Sonoma Mosquito and Vector Control District shall be notified of the
existence of the onsite detention facilities. All requirements and
recommendation. of said district shall be incorporated into the development and
maintenance of the detention piping. Marin-Sonoma Mosquito and Vector
Control District guidelines and requirements (latest edition) shall be considered
part of the plan.
2. The detention piping shall be maintained in a manner#o eliminate standing
water that is not part of the detention function during the `rainy' season. _
3. Application of mosquito iarviccides (Bacillus Thurengensis or Altoside®, or
approved equal commercially ,available products) shall only occur when
absolutely necessary. Application of larvicides or pesticides shall only be done
by persons or contractors licensed by the State, of California to perform such
services.
Site Access:
1. Ingress and egress to and from the site shall be maintained at all times.
2. A safe and. accessible route to all storm drain facilities covered by this plan
shall be maintained at all times.
Safet
1. Only trained and certified personnel shall be allowed to enter and work in
confined spaces.
2. Only licensed personnel shall be retained to apply pesticides or larvicides.
3. Ingress, egress and access routes shall be maintained at all times.
Aesthetics:
1. The site is to be regularly inspected for accumulated., trash and debris, quality
and viability of landscaping with regard to erosion control.
2. Debris and trash shall be removed as part of the inspection. process.
3. All. landscaping used as erosion control measures shall be maintained and as
necessary, refurbished or replaced in-kind.
Steven J. Lafranchi, P.E., L.S.
Steven J. Lafranchi .& Associates, Inc.
140 Second Street, Suite 312
Petaluma, California 94952
(707) 762-3122
~5
ATTACHMENT 7
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A ~~9~i~ € ~ ® SIGHT LINE EXHIBIT ~
s1~r+ ~ L.nFwwcw a nssocuTes, mc. a
avc encw~as-wm wmerais-unoaunn~o LANDS OF SUNNYD.DEYEIOPMENT LLC, ET AL
$ aon~. w,c ~,~ 1311 "D" STREET 8 216 SUNNY SLOPEAYENUE APN'.019-130-049 8 APN 019-130-011
~,n "" CA1IImn~ ~ PETALUMA CALIFORNIA. •' J
AT~'ACHNIENT 8
Borba, Irene
From: Alan Fulkerson [alan@sjla:com]
Sent: Tuesday, May 25, 2010 3:06 PM
To: 'Steve'
Cc: Borba, Irene; Bates, Curtis
Subject: Sianny'D'
Attachments: Impermeable Lot Coverage Hydrographs:pdf
There are three (3) attached multi-hydrog~aph plots. The 10 and 400 year storm frequency plots are based on a Run-Off
Coefficient (G} of 0.90, equating the completed subdivision (Parcels 1-4} as being covered completely by asphalt paving.
The attached multi-hydrograph plot of the 50Q year storm event has an associated 'C' of 0.75, which in this case happens
to coincide with site coverage being approximately 75% asphalt (`C'=0.90) and 25%° permeable surface with a `C'=0.50
('C'=0.75 is a composite value based on the two surface areas).
The 110 lineal feet of 36-inch diameter'pipe as proposed (both previously and currently} for this project as a storm-water
detention basin., has more than adequate storage volume to detain and meter out the post construction storm-water.run-
off (based on the entire development. being covered by asphalt) to less than the peak discharge rate of an equivalent
preconstruction storm event. The post-construction 500-year storm event (`C'=.0.75) exceeds the equivalent pre-
construction storm event peak discharge .rate by only 20 gallons per minute (0.04 cubic feet per second) with a few cubic
feet of required detention storage to spare.
The metering device consists of a drop inlet or manhole with a baffle separating the 36" inlet pipe from the outlet pipe (15"
or 18" per City Standard). The baffle will have a 5-inch high by 3-inch wide orifice. (opening) at the bottom which will nicely
regulate the discharge to pre-construction levels. A 45 degree v-notch weir`, with an invert elevation 2.75-feet above the
bottom of the orifice, will serve as a secondary metering device for discharge rates exceeding 0.82 cubic feet per second,
and as an overflow should the orifice at the ,bottom of the structure become obstructed.
Alan D. Fulkerson, P.E.
Steven J. Lafranchi & Associates, Inc.
140 Second Street, Suite 312
Petaluma, GA 94952
(707) 762-3 122
37
iu~ti-~rog~aph P9®t .
_.
_.: __ ,
__
_.
Hydraflow Hydrographs Extension for AutoCAD®Civil 3D® 2009 by Autodesk, Inc. v6.066
Hyd. No. 1 Flyd. No. 3
Ex. Hydrograph Outlet Structure
Hydrograph type" =Rational Hydrograph type =Reservoir
Peak discharge = 0.726 cfs Peak discharge = 0.68 cfs
Time to peak = 15 min Time to peak = 16 min
Hyd. Volume = 653 cult HY~• Volume 967 cuff
Ex. Hydrograph thlrough Outlet- Structure
10-yr frequency
Q (cfs)
Q (cfsp
2:00
1 A0
0 aQ
?.oo
1.00
0.00
0 5 10 15 20 25 30'; 35` 4U, 4~ au
Time (min)
Hyd No. 1 ®Hyd No. 3
~~
Multi@Hydrograph PI®f
_. _
Hydraflow Hydrographs Extension for AutoCAD®Civif 3D® 2009 by Autodesk, Inc. vfi.Dfi6!
~y~Aa ~®• ~ ~y~• ~®.
Ex. Hydrograph Outlet Structure
Hydrograph type =Rational Hydrograph type
Peak discharge =Reservoir
= 0.94 cfs
'Peak discharge = 1.027 cfs
Time to peak = 15 min Time to peak = 16 min
~
Hyd. Volume 924 cult ~ Hyd Volume ~ 1,371 cufit
~ (cfs)
3.00
2.00
1..00
0.00
0 5
Hyd No. i
1'0 15 20 25 30 35 4U `-~
® Hyd No. 3
Q (cfs)
3.00
2.00
1.00
0.00
ov
Time (min)
h'/
Ex. Hydrograph through Outlet Structure
100-yr frequency ;
~It®ydro:raph PI®t
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_. _ _ .
. .... ..:..:.
Hydraflow Hydrographs Extension for AutoCAD® Civi13D® 2009 by Autodes , nc:
Hyd. N®. 1 {iyd. N®., 3
Ex. Hydrograph Outlet Structure
Hydrograph type =Rational Hydrograph type
Peak discharge =Reservoir
= 1.34 cfs
Peak discharge = 1.298 cfs
Time to peak = 15 min Time to peak = 15 min
Hyd. Volume = 1,168 cult ~:Hyd. Volume
/"'/i~'1'~"`~9oXi4~' = 1,445 cufit~
~ ~7~GJ~"
p (cfs)
3.00
2.00
Ex. Hydirograph through Outlet Structure
~ ,yr frequency
Q (cfs)
1.00
0 5
Hyd No. 1
3.00
2.00
1.00
I ~ ~ I ~.~®~, i t. .~ ~~ 0;00
.,. ~~ 50 ,..:.
... ---
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10 15 20
® Hyd No. 3
25 :3U ors
tv ~~
Time {min)
~~
Pond Report _ _,
..........::
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-° - Tuesday, May 25, 2010
Hydraflow liydrographs Extension for AutoCAD®Civil 3l~ 2009 by Autodesk, Inc. v6.D66
Pond iVo. y -Detention.. Pond
Pond Data
UG Chambers -Invert elev. = 100.00 ft, Rise x Span= 3.00 x 3.00 ft, Barrel Len = 17 0:00 ft; No. l3arrels =1, Slope = 0.50%, Headers = No
Stage /Storage Table
Stage (ft) Elevation (ft) Contour area. (sgft) Incr. Storage {tuft) Total storage (cuff)
' 0.00 100.00 Na 0
12 0
12
0.36 100.36 n/a 60 73
0.71 100.71 . Na 93 1 ~
1.07 101.07 n/a
n/a 108 274
1.42 101.42 Na 115 389
1..78 101.78 Na 115 504
2.13 102.13 N 108 613
2.49
84
2 102.49
102.84 a
n!a 93 705
.
3_P0 103:20 n/a 60 765
778
3.55 %, 103:55 Na " 12
Culvert /Orifice Structures Weir Structures
[Al [Bl [CI [PrfRsr] [A] IBl [~] [D]
Rise (in) = 5.00 Inactive 0.00 Inactive Crest'Len (ft) = 0.00 Inactive 0:00 0.00
0
Span (in) = 3.00 6.00 0.00 1.00 Crest EI. (ft) = 102.75 100:50 .
0.00 0.0
33
3
Barrels
No = 1 1 0 16 Weir Coeff. = 1.05 3:33 -
3.33
.
Invert EL (ft) = 100:00 100.00 0.00 100.00 Weir Type = 45 degV Rect -- --
N
Length (ff) = 0.50 0.50 0.00 1.00 Multi-Stage = No Yes o
No
Slope (%) = 0.50 0.00 0.00 Na
N-Value = .014 .013 .013
60
0 Na
60
0
Exfii.(inlhr)
= 0.000 (by Wet area)
Orifice Coeff. = 0.60 _
:
0.60 .
Multi-Stage = Na No No No TW Elev. (ft) = 0.00
_
._
J Note: CulverUOrifice ouHlows are analyzed under inlet (ic) and ou[lel(oc) control. Wetr risers checked for orifice conditions (ic) and submergence s _.
Stage /'Storage /Discharge Table
Stage Storage Elevation Civ A Civ B Clv C PrfRsr WrA WrB Wr C
f Wr D Exfil User
cfs cfs cfs Total
cfs
ft tuft ft cfs cfs cfs cfs cfs s
cfs c
00
0
0 100.00
0.00
0.00 ---
0.00 _
0.00 .__ ---
-
- a.ooo
0.028
.
0:36 12 100.36 0.03 oc 0.00 ---
-
0.00 -
' 000 ---
---
0:00 ... ~
--- _ 0.355
0.71 73 100.71 .0.36 is 0.00 --- 0.00 --_
00
0
- ;,,;.
-
-
- 0.464
1,07 165 101.07 0:46 is 0.00 -- 0.00 -- .
:
0
00 -- _
_
~
-
" 0.552
1.42 274 101.42 0.55 is 0.00 -- 0:00 .
0
00 -- _
- _~
--- 0.628
1,7g 389 101.78 0.63 is 0.00 --- 0.00 ---
0
00 .
0.00 --
-- 0.695
2.13 504 102.13 Or70 is 0.00 - :
0
00 -- -
--- 0.757
2.49 613 102.49 0.76 is 0.00 -- 0.00 ---
00
00' 0
0 .
0.00 -- ~
--- -- 0.816
2..84 705 102.84 0.87 is 0.00 --- .
.
14
00 0
0
0
00 --- _
--- 1.006
3.20 765 103.20 0.87 is 0.00 ---
- .
.
60'
00 0
0 .
0.00 -- _
-- 1.519
3.55 778 103.55 0.92 is 0.00 -- .
.
~i
ATTACHMENT 9
The task is to find a mechanism in which short term and long. term maintenance
can be funded without. creating an entity such as a homeowner's association
(HOA). The project is a minor subdivision without any commonly owned parcels
which precludes the creation of an HOA.
The maintenance agreement will include language that will. create an account
that will be initially funded by fhe owners of the property (SunnyD.LLC). The
initial seed money will be determined by estimating costs for yearly maintenance
requirements (storm drain .related inspections, cleaning and pollution control
inserts for treatment and.. detention) along with future private infrastructure repair
and/or replacement: (sanitary sewer, water services, storm drains, driveway) that
would run with the land via a deed restriction.
The established account will be controlled by SunnyD, LLC as long as they have
any ownership in the development. Ownership would include Parcel 1 of PM No.
361 the four parcels in this project and the designated 'remainder.
All required yearly inspections shall.. be reported to the City of Petaluma Building
Department. SunnyD, LLC shall be responsible for this yearly reporting as long
as they retain ownership.
As lots are sold, each new owner will be required to contribute funds into the
maintenance fund. Contributions to this fund will be collected from each owner
on an annual or semi-annual basis to maintain yearly maintenance and fund
future replacement or until, such time that the account becomes sufficiently
funded to sustain the yearly maintenance and long term replacement.
At such time when-SunnyD no longer has an interest in any of the properties, the
remaining owners will appoint, on a yearly basis, one of .the group to be
responsible for the operational duties that SunnyD previously managed.
The agreement will also contain provisions on what to do in the event that a
shared facility is not properly maintained and fails or adversely affects
neighboring properties or the public right of.way. Typically, failure to comply with
terms of a private maintenance agFeement'is a private matter between private
parties. In the case of illicit discharges or other Cityenforced violations, the terms
of the agreement could be enforced by the City's Code Enforcement Program.
A draft operation and maintenance manual has been prepared by SJLA, Inc as
the guiding document for yearly maintenance requirements and direction for
future inspections'to address long term replacement or repairs. The O&M manual
will be recorded will each parcel.
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A~TACHMEIVT 10
PARCEL NET PARCEL SIZE MAX. IMPERVIOUS` EXAMPI;E
COVERAGE
No. 1 8,052 SF 4,831 SF 3,000 SF single story
house
500 SF for garage
500 SF for driveway
500 SF for concrete
patio
331 SF for other misc.
items such as accessory
building, walkways, etc
No. 2 10,504 SF 6,302 SF 3,500 SF single family
house
500 SF for garage
500 SF for driveway
500 SF for concrete
patio
1,301 SF for other misc.
items such as accessory
building, walkways, etc
No.3 8,888 SF - 5,332 SF 3,200 SF single story
house
500 SF for garage
500 SF for driveway
500 SF for concrete
patio
632 SF for other misc.
items such as accessory
- buildin ,walkways, etc
No.4 9,692 SF 5,815 SF 3,500 SF single family
house
500 SF for garage
500 SF for driveway
500 SF for concrete
patio
815 SF for other misc.
items such as accessory
building, walkways, etc
s:/planning/misc/sunny d impervious iot coverage cnari
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