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VILLA MAGNA
MAJOR USE SPECIAL PERMIT
SITE UTILITY STUDY
Prepared for Florida East Coast Realty, Inc.
By:
The Corradino Group. Inc.
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VILLA MAGNA
Site Utility Study
Introduction
The Villa Magna Project will include the construction and development of a building located on
Brickell Bay Drive between S.E. 12`h Street and S.E. 13' Street. The building will be comprised of
two 44-story residential towers complemented with an eleven -level parking garage, as well as,
commercial areas for both retail and restaurant use. The total site covers approximately 3.71
acres.
1. Drainage
Existing Drainage
The site is currently vacant and the existing drainage system consists of some sparsely
located inlets along the curb and gutter in the public right of way.
Proposed Drainage System
The primary drainage system for the project will consist of drainage wells, which will allow
the storm runoff to be fully contained and disposed of on site. The project will be designed
consistent with a 5-year design storm, DERM Water Control section D-4, part 2 of Miami -
Dade County Public Works Department.
It is currently anticipated that ten 24" drainage wells will provide sufficient capacity for the
project. The final drainage design for the project will provide a drainage system consistent
with the above criteria, and consistent with all approval and permitting requirements for the
project.
Preliminary drainage computations for the project are provided in Table 1, below, which
includes the basis for design_
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Site Utility Study Page 1
Table 1
Drainage Calculations
Runoff Generation
Total Contributing Area 8.17 Acres
Total impervious Area (Incl. Wall area)
Roof Area
Paved Areas
Exterior Wall Area (7/3 South Wall Area)
(570'-10"x 340'1/3
Pervious Area (green areas)
Average Runoff Coefficient
Impervious Site Area = 7.78 x 0.95
Pervious Site Area = 0.39 x 0.30
338,674 sf = 7.78 Acres
77,009 sf = 1 .77 Acres
67,582 sf = 1 .55 Acres
194,083 sf = 4.46 Acres
16,895 sf = 0.39 Acres
7.391
0.117
Average Runoff Coefficient, C = (7.391 +0.117)18.17 = 0.919
Design Storm 5 Year Return Frequency
Time of Concentration 10 min.
Rainfall Intensity 6.10 in/hr
Peak Runoff Q = CIA = (0.919)(6.10)(8.17) = 45.8 cfs
Assume each 24' diameter well flows at 700 g.p.m./per ft of head (As per Jaffer Associates)
700 g.p.m./448.8 = 1.56 cfs
Peak Runoff/How Per Well = 45.8 cfs/(Ave. 3 ft of head` x 1.56 cfs) = 9,79 wells
*3 ft of head is an average assuming most of the future site will be raised at least 3 feet.
Provide 10 - 24" Diameter Wells
Detention Tank
Design Criteria: 1.5 minute (90 sec) detention time per detention structure
Volume of Tank required for (45.8 cfs x 90 sec.)/10 =412 cubic ft / tank or 3,084 gallons each
Interior Tank Dimensions: 8' {width) x 7' (height) x 8' (length) = 448 cubic feet each
Provide 1 tank for each well, of 448 c.f. volume each
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II. Water Distribution System
The Miami -Dade Water and Sewer Department (M-DWASD) owns and operates the
following water mains in the vicinity of the project. (See Appendix)
Location
Between
Water Mains)
Brickell Bay ❑rive
S.E. 12' Street & S.E. 13' Street
(West side of the Project)
12"
Brickell Bay Drive
S.E. 12' Street & S.E. 13'h Street
(West side of the Project)
16"
111. Sanitary Sewer Collection System
The Miami -Dade Water and Sewer Department (M-DWASD) owns and operates the
following sanitary sewer mains in the vicinity of the project. (See Appendix)
Location
Between
Sewer Main(s)
Brickell Bay Drive
S.E. 12' Street & S.E. 13'h Street
(West side of the Project)
18" (Gravity)
The Villa Magna Project is projected to create a water demand of 267,958 gallons per day
(GPD) as per Chapter 24 of the Code of Miami -Dade County, Section 24-13_
In order to accommodate for this demand, both the water and sanitary sewer connections
to serve the project shall be coordinated with the Miami -Dade Water and Sewer
Department (M-DWASD), to ensure that the existing system has adequate capacity.
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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 Counties or private disposal and recycling facilities.
The volumes of solid waste projected to be generated by the project are shown in Table 4,
below.
Table 4
Project Solid Waste Generation
Residential
1,121,890 sq.ft. @ 4 Ibs/ 100 sq.ft./clay
Office/Commercial
33,500 sq.ft. @ 4 Ibs/100 sq.ft_/day
44876 Ibs/day
1340 Ibs/day
(23.11 tons/day)
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