HomeMy WebLinkAboutIII. Tab 3. Site Utility StudyGROVE ESTATES
SITE UTILITY STUDY
(Drainage Calculations provided by Jorge Avigio, PE & Associates
I. DRAINAGE
A. Drainage Area
The site is located on SW 37`h Avenue (Douglas Road). It has approximately 250 feet of
frontage on Douglas Road. It consists of a total of 7.34 acres.
The development consists of the construction of eleven single family houses, with associated
driveways and entrance ways. After development, approximately 45.35% of the property wifl
be impervious areas and approximately 54.65% of the site will remain as pervious areas. The
storm water discharge will consist primarily of building roofs, driveways and landscape areas
run-off. The coefficient of run-off is arrived at as follows:
0.4535 (impervious) x 0.90 = 0.41
+0.5465 (pervious) x 0.30 = 0.16
Overall coefficient 0.57
B. Existing Drainage System
The city of Miami presently maintains a roadway drainage system in all fronting streets,
The existing roadway system appears to be of sufficient capacity to handle the present
conditions.
C. Proposed Drainage System
The primary drainage system of this development will consist of a system of exfiltration trench
and/or infiltration wells which will allow the stormwater runoff to be fully contained on site. No
off -site runoff is anticipated from this development. The determination of the use of either or
both systems and the exact extent of them will be determined after the geotechnical
investigations are preformed.
The stormwater will be collected through a system of catch basin inlets and transported by pipes
to the runoff disposal system.
Runoff from driving surfaces such as driveways and parking areas will be pre-treated in order to
capture the oils and greases prior to flowing into the ground water.
Page I
Runoff Generations
2.
Sarnpie Drainage Calculations
Toto|Arem
a- Impervious
b.Pervioun
Average Runoff Coefficient
7.2GAureo
45.35% or3.2QAcres
54.6596 or4Acres
3, Design Storm 5yearn
4� Time ofConcentration 10.00min
5. Rainfall Intensity 6.1O in/hr
Assuming the use of drainage wells with an average flow of 800 gpm per foot of head, using 3
feet of head:
3x800gpm=2,400gp/nper well
2'400gpm=5.35CFS
(Peak runoff)
(Flow per well)
35.35CFS
5.35CFQ
=4.73Wells
Therefore, provide 5 - 24^ diameter wells
Detention Tank:
Providing for minimum nfg0 seconds detention time in storage bank.
Volume oftank required tohandle 2'4OOgpnnfor 90seconds.
2.4O0qpmx1.5minutes =3.00Ogal/tank or482cubic feet each
Then, provide 5tanks each with the following interior dimensions:
11. WATER DISTRIBUTION
The Miami Dade Water and Sewer Department owns and operateswateran8 inch main
located pnDouglas Road.
The water connection toserve the development will be done from the 8inch main. The
connections will consist of dornestic water and irrigation water, No on -site wells are planned for
this project. Development shall beserved from an8''line.
The calculations for anticipated water volumes required for this project are shown below, in
Table 2.
Table
Water Volumes
Single Family Homes
Total flow demand 3,850 gpd
UiSANITARY SEWERS
The Miami Dade Water and Sewer Department does not have a gravity sewer main. Septic
tanks will bosufficient toserve this project.
IV. SOLID WASTE GENERATION
Solid waste generated by this project will be collected on standardized on -site containers for
refuse and neovdeb|es. Regular pick-up service will be provided by either private hauling or the
City ofMiami Solid Waste Department.
9
•
1 MARMORE
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J
LOCATION MAP
NOT TO SCALE
SEA RD
N PROSPECT DR
S PROSPECT DR
E SUNRISE AV
FIRM FLOOD INSURAN
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. AV
flf AY '44
•
AP
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FIRM
at,'•31) NSURANCE fiATE MAP
DADE CVUNTY,
LOREDA
NO WCWORATD AREAS
M OF OS
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i •DX•1 :to..;t PI* ,,,ITk
11411ACER-4
17Q5CC18
MAP MUD'
MARCH 2,1994
Ygd-4,41Y44,n,pq N4t44g,os,g,1
PROJECT FLOOD CRITERIA MAP
EXHIBIT 8
THIS PROJECT
FLOOD CRITERIA
EL. ± 6.5 NGVD
E
aPo0ar 5f4 CFMEi
a.a?. {S.iPY
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eROWARD COUNTY
•ci5s3
GT57A Lvet as DR
s#pxrpi Cat,
4/5/72
DEPARTMENT
E.NT
4/►4/77
APR WGr'r. [dI r
g.ggRrxF 4.0
EXHIBIT C
THIS
PROJECT
EL. +2.5 NGVD
tko
.sos#,88 s"
LEGEND:
iwra ww.w 2----
(ESTIMATED)
NOTES:
#. CONTOUR INTERVAL 1.0 FOOT.
(Except as indicated)
2. DATUM tS MEAN SEA LEVEL.
NOTE: PREPARED FROM USSS.
SURVEY DATA
DESK N TANOAR
AVERAGE OCTOBER
GROUND WATER LEVEL
1960 —75
Ti OF
•
771a
1
s
7720
NASD WATER ATLAS SHEET J-? 8
75345
7
7535
i f
;17527
1
EXHIBIT D
(8215
1 |on communications with Joe VVieseibe/gregarding
Schwartzberg litigatior and required information; communications from Eric Heller
fomvardingcomments hySpeoonrelated 10execution ofEasement cndSupp|arnent 40
r
2 r&/ prepare revised declaration nfreo�ic1ions� follow-up with
Bill Riley; draft correspondence to Nancy Rubin; review |U 1 and |U-2 uoom| letter to
Nancy Rubin otCounty 10
3 Inc 10993 Te|ephoneconference with City Attorney Raul /4gui|e
regarding rent payment 25
4 ynb hzi|ovv up with architect regarding status of contacting
Tony Abbate .1O
5 boydub Conference with Robert Pippin .20
O presidential estates conference with Maria Teresa FojoregardinQ site plans
and remaining sign offs; follow-up with Armando Hernandez at Miami -Dade County
Public Works Department; obtain copy of signoff; conference with Carlos Heredia at
Miami -Dade County Fire Department and obtain copy of sign off; forward sign off to Maria
Teresa Fmoand Ron Ao|e; travel to and from Miami -Dade County and meet with Ron
Ao|e; review plans and remove single family residential unit; meet with Fred Endaro; meet
with Al Torres; obtain confirmation email from AJ Torres ofapproval 2.75
7 civil marine fnUow-upregarding site plans; receive correspondence
from Town ofMedley's consultant regarding road improvements .30
8 oako|uky follow-up regarding taxes onWilliams Island Parcel;
conference with Roxana at tax collectors office; letter to Roxana; obtain 2003 and 2004
assessments for master parcel; communications with Gary Appel; conference with Cliff
Schulman 1.20
Q avantureland trust conference with CarlSkUne;prepare revised easement;
follow-up review with Rnm| Estate Department 75
10 Oohdagrand opera communications regarding letter <ncity .25
11 pauadana follow-up with Carl Harrison regarding meeting; follow-up
with Nancy Rubin .25
12 nnkia receive communications from Joanne Pirello at Miami -
Dade County requesting survey; followup with Ludivina Palmerin .30
13 nabiHi|ton follow-up with Mike Ge||inarregarding release ufletter uf
credit .10
14 liberty station conference with Claudia Fnnhnoi||mregarding approval of
county advertisement regarding request; letter LoCassandra Henderson .30
15 shnmaryder letter toNathan KVgonregarding substantial deviation;
review order related to denial of motion for protective order .50
18 aUoe follow-up communications regarding right mfway deed
and partial release; fo||owupregarding county comments .3O
17 «eone follow-up from Town Attorney regarding judge's order
related to dismissal; follow-up with Rnnier Cruz .10
18 city furniture conference with Rick Haso|ingar A
0