HomeMy WebLinkAboutSite Utility StudyD. SITE UTILITY STUDY
MIADOCS 888978 I
Fekruary 2006
TIZIANO II
MAJOR USE SPECIAL PERMIT
SITE UTILITY STUDY
PREPARED FOR
Edgewater, LLC.
KHA Project No.: 0427850001
Prepared by:
KIMLEY-HORN AND ASSOCIATES, INC.
1691 MICHIGAN AVENUE, SUITE 400
MIAMI BEACH, FL 331.39
INKimley-Horn
and Associates, Inc.
Site Utility Study
Introduction
Tiziano 11 is a proposed mixed -use development to be located on the north-east comer of NE 4th
Avenue and NE 23rd Street, in the City of Miami, Florida (see Site Location Map -Fig 1). The Tiziano
11 project shall consists of a multi -use tower on a single podium with a pool deck, office, retail and
lobby space. The ground -level will include streetscape improvements, perimeter plantings and a
landscape plaza. Table 1, below depicts the details of the proposed project.
Table 1:
Project Summary
Retail
2,385
Office Space
8,150
Lobby & Corridors
3,182
Apartment
55
Cabanas @ Pool Deck
1,808
Parking (Gross)
98
I. Drainage
Existing Drainage
There is no visible on -site drainage system. The subject site sheet flows into the adjacent right of way
and percolates into ground water table.
Tiziano II
Site Utility Study
Page 2
Figure 1:,
Site Location Map
NE 25TH ST
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NE 24TH ST
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23R1 TE
3RD ST
2ND TE
NE 22N! ST
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21 ST ST a
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PROPOSED
PROJECT
Proposed Drainage System
The drainage system for the proposed development will consist of drainage wells, if possible, to
facilitate on -site disposal of storm water runoff. The 5-year design storm event will be used to design
the storm water management system, in accordance with Section D-4, "Water Control", of Part 2 of
the Miami -Dade County Public Works Manual.
Based on preliminary calculations, it is anticipated that thee (3) 24" drainage wells will provide
sufficient capacity to dispose of the design 5-year 24-hour storm water runoff generated by the
proposed development. Preliminary drainage computations for the project areas are provided in
Attachment "A" Preliminary Drainage Well Calculations, which includes the basis for design.
The final drainage design for the project should be in conformance with the requirements of the
Miami -Dade County DERM Water Control Section, Florida Department of Environmental Protection,
and other local, State and federal regulatory agencies having jurisdiction over the project.
Tiziano II
Site Utility Study
Page 3
II. Water Distribution System
The water mains owned and operated by the Miami -Dade Water and Sewer Department (MDWASD)
in the vicinity of the project is shown in the Table 3.
Table 3:
Existing Water Mains
NE 231d Street
NE 4th Avenue and east side of the project
6"
NE 23rd Terrace
NE 4th Avenue and east side of the project
None
NE 4`h Avenue
NE 23rd Street and NE 23rd Terrace
6" and 12"
Per the MDWASD Water Atlas Sheet, a 12" water main fronts the property along NE 4th Avenue. In
accordance with Miami -Dade Water and Sewer Department (MDWASD) criteria, the developer may
be required to extend a new 12" water main along NE 23td St. (fronting the property). A final
determination of the points of connection and requirements will not be provided by MDWASD until
Water and Sewer Agreement is requested by the owner. Water service meters would need to be
purchased at the owner's expense and installed by MDWASD forces.
See Attachment "B" for a copy of the MDWASD water atlas sheet for the project area.
III. Sanitary Sewer Collection System
Table 4 depicts the sanitary sewer mains owned and operated by Miami -Dade Water and Sewer
Department (MDWASD), within the vicinity of the project.
Tiziano II
Site Utility Study
Page 4
OcatioY1.:;..:;
NE 23`d Street
Table 4:
Existing Sanitary Sewer Mains
Between
NE 4th Avenue and east side of
the project
Sanitary Sewer Alain(s)
N/A
NE 23`d Terrace
NE 4th Avenue and east side of
the project
8" Gravity Main
NE 46 Avenue
NE 23`d Street and NE 23`d
Terrace
72" Gravity Main
The existing 8" gravity sanitary sewer main along NE 23'd Terrace may have sufficient capacity to
accommodate the proposed development. However, this can not be verified until a downstream
analysis of the existing 8" gravity line is completed. A letter of availability and further coordination
with MDWASD is recommended to verify the proposed sanitary sewer service connection points and
requirements for this project. MDWASD may require upgrades to the sanitary sewer system, but this
can not be determined without a request for a water and sewer agreement. A copy of the MDWASD
Sewer Atlas sheet has been attached (See Attachment B).
MDWASD Pump Station #2 receives the flows from these mains. As of O1/06/06, this pump station is
operating at an average yearly NAPOT hours of 3.02 which is 48% of its design capacity. Therefore, a
new sanitary sewer pump station or upgrades to said pump station may not be required for the
proposed development. A final determination regarding the status of the existing transmission system
and the need for possible improvements will not be made until construction plans are submitted to the
Miami -Dade County DERM Wastewater Section and a Sanitary Sewage System Capacity Certification
Letter is issued. Please refer to Attachment "B" for the sewer atlas and Attachment "C" for Pump
Station Monthly Information.
Tiziano II
Site Utility Study
Page 5
Type f
Occupancy
Apartment
Table 5:
Water & Sewer Flow Generation
55 units
200 gpd per unit
Total Average.
Daily flow (gpd)
11,000
Retail
2,385 sf
5 gpd per 100sf
119
Office pace
8,150 sf
10 gpd per 100sf
815
Total Anticipated Flow
11,934
IV. Solid Waste Generation
Solid waste generated by this project will be collected in standard on -site containers for refuse and
recyclables. Regular pick-up service will be provided either by private hauling companies and/or by
the City of Miami Solid Waste Department, who will transport the waste to Miami -Dade County' s or
private disposal and recycling facilities. The volumes of solid waste projected to be generated by the
project are shown in Table 6.
Apartment
Table 6:
Solid Waste Generation
55 units
5 lbs/unitlday
0.138
Retail
2,385 sf
3 lbs/1000 sf/day
0.004
Office pace
8,150 sf
6 lbs/1000 sf/day
0.025
Total Anticipated Solid Waste Generated
0.167
Tiziano II
Site Utility Study
Page 6
Attachment A
Preliminary Drainage Well Calculations
TIZIANO II
City of Miami, Florida
)RAINACE CALCULATIONS:
DRAINAGE WELLS
(MASS DIAGRAM — DERM CRITERIA)
1. Site Data:
A. Average Control Water Elevation (NGVD) _
B. County Flood Criteria Elevation (NGVD) =
C. F.I.R.M. Base Flood Elevation (NGVD)
D. Lowest proposed inlet elevation (NGVD) =
2. Total Property Area :
A. Impervious Areas:
a) Asphalt and concrete pavement =
b) Roof areas =
c) 1/3 of the NE building corner =
Total Impervious Area (A) =
B. Pervious areas:
a) Green Areas =
C. Total Contributing Area =
3. Weighted Runoff Coefficient (C):
Runoff Coefficient Impervious (C 1) =
Runoff Coefficient Pervious (C2) =
C = [(Al x C1) + (A2 x C2)] / A;
C x A = Total Contributing Area;
C=
CxA=
0.370 Acres
Acres
Acres
Acres (in excess of property area)
0.835 Acres
Acres
Acres
0.890
0.76 Acres
4. Time required to generate one inch of runoff (per DERM Water Control Section D-4)
Rainfall Intensity (I) = 308.5 / [(48.6 x F°'1 I) + t (0.5895 + F25)]
Frequency (F) = e ;;;?rv'J '; ' years - Frequency Curve
Q = CIA, V = Qt; Vey ; = Qtp ;n_), to ;= Time to generate 1 inch of runoff
Vt2 in.) = CIAto in.)
1"xA=CIAt(I;,,)
Solving for tit to in.) = 1" / (IC)
Time to Generate one inch of run-off t(in) = 11.18 Min.
Time to reach the inlet (tc.) -;;:`Min,
Total Time required to generate 1 in of runoff: = 21.18 Min.
D-WELLS.xls BASIN
5. Cumulative Runoff (Inflow Mass Diagram)
Time
CxA
(acres)
I
(inches)
Q
(CFS)
Accumulated
Storm
Runoff
(CF)
Min)
Sec.)
8
480
0.756
6.405
4.84
2,325
10
600
0.756
6.166
4.66
2,798
15
900
0.756
5.641
4.27
3,839
21.18
1271
0.756
5.104
3.86
4,904
30
1800
0.756
4.493
3.40
6,115
40
2400
0.756
3.956
2.99
7,180
50
3000
0.756
3.534
2.67
8,017
60
3600
0.756
3.193
2.41
8,693
90
5400
0.756
2.477
1.87
10,113
120
7200
0.756
2.023
1.53
11,014
180
10800
0.756
1.480
1.12
12,089
6. Drainage Well Design Discharge Rate:
Based on well discharge rate of: filAtia*
GPM/ft. Head
WeU
No.
DW-1
Lowest inlet
Rim
(NGVD) •
9.00
Oct. Water
Table elev.
(NOVI))
2.00
lleadloss due
to Higher SG
of Salt Water
2.20
Head Acting
on Well (ft.)
4.80
Vett:Discharge.
Rate (CPS).
4.28
DW-2
DW-3
9.00
9.00
2.00
2.00
2.20
2.20
4.80
4.80
4.28
4.28
Well'Sutnre DiMeaskals
wigtii-(fL.) Length (ft.)
AT:171-7,00-g-Ef
Well Structure
Storage Volume
(CF)
192
192
192
Well Discharge Rate (CFS)1 8.56
7. Detention Time:
Total Storage (CF)
The drainage well structure must be designed to detain runoff for a minimum of 90 seconds prior to discharge.
Qd = Design Runoff Rate (CFS) =
Vd = Detention Volume (CF) = Qd x 90 sec. =
Vdi = Detention Volume Per Well (CF) =
W = Width of Well Structure (ft.) =
L = Length of Well Structure (ft.) =
3.86 CFS
347.34 CF
115.78 CF
5.0 ft.
8.0 ft.
384.00
}lin is the minimum depth required from the top of well casing to the floor of the well box to achieve 90 second detention time:
1-1„11„ (ft.) = Vdi ( W x L) = 2.90 ft.=Depth from top of casing to bottom of well box
8. Excess storm water runoff excluding well structure storage:
Time: ,
Well
Discharge
Rate
(CP'S),.
Accumulated:
Well
Discharge
Volume
(CP) _
Accumulated :
Storm Runoff
(CP)
Total Overflow
Volume
(CP)
(Min.)
(Sec.)
8
480
8.56
4,107
2,325
-1,782
10
600
8.56
5,134
2,798
-2,336
15
900
8.56
7,701
3,839
-3,862
21.18
1,270.70
8.56
10,872
4,904
-5,968
30
1800
8.56
15,401
6,115
-9,286
40
2400
8.56
20,535
7,180
-13,355
50
3000
8.56
25,668
8,017
-17,652
60
3600
8.56
30,802
8,693
-22,109
90
5400
8.56
46,203
10,113
-36,090
120
7200
8.56
61,604
11,014
-50,591
180
10800
8.56
92,406
12,089
-80,317
9. Excess storm water runoff including well structure storage:
i.):
8
10
15
21.18
30
40
50
60
90
120
180
:(S
480
600
900
1,270.70
1800
2400
3000
3600
5400
7200
10800
Accumulated
Storm:Runoff
(CF)
2,325
2,798
3,839
4,904
6,115
7,180
8,017
8,693
10,113
11,014
12,089
Storage in
Well Structure
(CF) . .
384
384
384
384
384
384
384
384
384
384
384
Accumulated
Well,.
Discharge
Volume
(CF)
4,107
5,134
7,701
10,872
15,401
20,535
25,668
30,802
46,203
61,604
92,406
Total Overflow.
Volufi
(CF)
-2,166.39
- 2,720.18
-4,245.65
-6,352.29
- 9,669.76
-13,739.07
-18,035.56
-22,493.49
-36,473.77
-50,974.77
-80,700.98
Safety Factor
Safety Factor
2.22%
2.30%
Attachment B
Existing Utility Records
*W.
/.•••'
92
\ NE 25 ST
•
9
1537
7 2
t-10"
9
II 79
a a,
!622
1
91
f5371
so
isNE 24 ST
2778
1
7 81
•
El'
1 0
87
I 2620
'77
62/ 83 NE 23 CT /
NE 23 ST-/ '----ThC:
."
1 2777 /
{,1 1
13
,.
4
86
SEWEa,
ISTLAS
306
806
I4OP
CL
C'J
z
_1co
crs
wa-V2 1flU3 (Iz)
10881
2
604 \
72
18s
Ws
r
DIN 20O4—013 --'
PLOTTED -
K.F. 2/11/04 iv
;., 1( 604 y
79.i
9642
1
7916
Li?
1.1.1
1
(7815)
NE 25 ST
NE 22 TER
/628
NE23CT
2
(I -io- 06)
d4 f4
Attachment C
Pump Station Monthly Information
PLII-1113 StahonNunlhly Infoirnation
Pump Slalom 3041047lacePegm
MIALISDADEWATERIEWERDEPAATMEAT
""ts, AtitAMSAFJEta,041pai-E-Piag:,7.i„
Saction-Tomsrhip-Rang0 • Ig
TOW Clat Krks 5yersdt
Number of Puma: 5
Yea414APO T Tryst 3.62
lie, BomktpdT 2.570.260
NAN spot 4.11 hut
X Cap 49
Generatar
User:
reArlIdd
MIAMI-DADE
Momimium it'll...I NICE blattl$N
'ifne,on....114NYWY
Telemetry FM ET clock EN
SINGtosarmacitylupd1 57.606E0
StreirmIlmItyMen Fadm 6
Stella. Cap Cert0Typrl
SWIM Capactrigpl 34.560,000
IntrmatealFlowslgyel 4.340-000
ibo26r2005.1.95 .058D. . ILY . • 5 • .. ..,... : IRODSR .. .
liV.i.1.1k
:814111)Sli
W.0030
.. ......,,:7.777.:.-,7-...3t.,:73.!'n.,-.:33.3--.•m•,..,3•52.4.Yrrotre.:Elstrm.e3,...YYYM-irt:ttmmtilmm.......„.. t....4.41mY..- ;.:,40,,,m.,.-:,-.,:-P,,,-...--- -
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EV2612005 200
11.19 '•5
-127*
6r23,02005 L,3.011 14.72. iY 5.
Date:
Mo.14APOT ADer3, Rik F10 a Purer Cesereentr-
060
Attachment D
Maps
4
IIMI
Kimley-Horn and Associates, Inc.
1691 Michigan Avenue
Suite 400
Miami Beach, Florida 33139
Phone: 305-673-2025
Fox: 305-673-4882
TIZIANO 11
FLOOD CRITERIA MAP
_ 1
4
NAN IS [43r
S12L •kPTO
#i f342
GT61 tvrtics pIY
itt
4
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IAws•ts •;e
4
6ND:
r-wf
(ESTJI4ATED)
[NOTES
1. CONTOUR OUR INTERVAL 10 -FOOT
(Except o* indicated)
2- DATUM IS MEAN $EA LEVEL.
Kimley-Horn and Associates, Inc.
1691 Michigan Avenue
Suite 400
Miami Beach, Florida 33139
Phone: 305-673-2025
Fax: 305-673-4882
TIZIANO !I
AVERAGE OCTOBER GROUND
WATER LEVEL 1960-75