The URL can be used to link to this page

Home My WebLink AboutSite Utility StudyEDC Corp. Environmental Development Consultants Corporation 2455 SW 27th Avenue. Suite 300 305.858.8100 PH • 305.858.4760 FAX Miami, Florida 300 GROVE BAY RESIDENCES PROPOSED CONDOMINIUM TOWER SITE UTILITY STUDY May 2006 Civil and Environmental Engineering • Permitting and Management • • • EDC Corp. Environmental Development Consultants Corporation 2455 SW 27Eh Avenue. Suite 300 305.858.8100 PH 305.858.4760 FAX Miami, Florida TABLE OF CONTENTS Page 1. General 3 2. Storm Drainage System 4 3. Water Distribution System 5 4. Sewer Collection System 6 5. Solid Waste Generation 7 EXHIBITS: "D" Location Map . 10 Storm Drainage Calculations 12 MD-WASAD Water Atlas 14 MD -Sewer Atlas 15 Proposed Water Use Calculations 16 DERM Pump Station Report . 17 Solid Waste Generation Calculations ......... ............ 19 Civil and Environmental Engineering • Permitting and Management 2 EDC Corp, Environmental Development Consultants Corporation 2455 SW 27th Avenue, Suite 300 Miami, Florida 305.858.8100 PH 305.858,4760 FAX 300 GROVE BAY RESIDENCES SITE UTILITY STUDY 1. General A. Project Location and Size The proposed project consists of a mixed use development consisting of three (3) Residential Condominium Towers to be constructed at an approximately 6.7 acre site located within a southeast tract of land located within the Mercy Hospital Complex in Miami I Fl. (See Exhibit A). The project is bounded to the north and west by Mercy Hospital and to the south and east by Biscayne Bay, ail being in Section 14, Township 54 South, Range 41 East, Miami -Dade County, Florida. The site is occupied by a hospital parking lot, which will be demolished for the new development. B. Proposed project build out: The proposed project build -out is residential use and consists of 300 condominium units. Civil and Environmental Engineering , Permitting and Management • • • EDC Corp. Environmental Development Consultants Corporation 2455 SW 27' Avenue, Suite 300 Miami, Florida 2. Storm Drainage System A. Existing Storm Drainage System: 305.858.8100 PH m 305.858.4760 FAX Perimeter roadway storm drainage systems along the south extension of Halissee Street and the loop road for the hospital contain little or no drainage systems. The existing parking lots has a series of catch basins and french drains to contain the minimum rainfall event as prescribed by Miami Dade code. No significant improvements to the existing Roadway Drainage System are expected as a result of this project other than some possible inlet modifications associated with the street sidewalk improvements, B. Proposed On -Site Storm Drainage System: The proposed storm drainage system to serve this project will be designed to fully contain on -site the storm water run-off and to meet the Miami. Dade County Department of Environmental Resources Management, (DERM) Environmental Resources Permit (ERP) requirements and the Florida Department of Transportation (FOOT). This will be accomplished by means of exfiltration trenches and deep drainage wells. No offsite run-off will be generated from the site. The total contributing site area and 30% of the building wall area exposed to the rain will be included in the Disposal Well System design calculations. An impervious coefficient of 0.95 will be used for the purpose of this study. Based on local knowledge experienced well drilling company for other projects in the vicinity, an approximate well discharge rate 800 gpm per foot of head can be expected. Storm water from roofs, internal driveways, walkways and parking areas will be conveyed by means of a collection system to sediment tanks sized to meet the detention volume requirements prior to discharging into the Well System, Additional Water Quality pre-treatment and Pollution Retardant Baffles at the catch basins will be provided at areas subject to vehicle traffic. There are two (2) existing drainage outfalls to the bay which may be reused as emergency overflows during extreme rainfall events. C. Required number of Wells: The proposed wells will be designed to maintain the site dry during the 5 year-1 day storm, to keep flooding below the perimeter grades during the 25 year-3 day storm and to keep flooding below the minimum flood elevation during the 100 year- 3 day storm. Based on the attached calculations, a total of 8 storm drainage wells are required to provide full on -site retention for this project depending on the actual yields obtained during the well drilling operations. It may be possible to reduce the number of wells by increasing the length and depth of new exfiltration trenches surrounding the property, The final Stormwater design will be predicated on additional soil boring and well tests. For Well Disposal System calculations refer to attached Exhibit "B''. Civil and Environmental Engineering - Permitting and Management • • • EDC Corp. Environmental Development Consultants Corporation 2455 SW 27Th Avenue, Suite 300 305.858.8100 PH 305,858.4760 FAX Miami, Florida 3. Water Distribution System A. Existing Water System Facilities: Miami -Dade Water & Sewer Department (MD-WASD) owns and operates the following domestic water facilities in the vicinity of this project: An existing 24-inch water main that runs north -south in South Bayshore Drive from which a 12 inch watermain loop feeds the entire Mercy Hospital site along the south, east and north property limits, connecting to the existing 24 inch main on South Bayshore Avenue along the entire west side of the property. • An existing 8-inch and 12 inch watermain that runs along a potion of the north side of the property to feed the main hospital complex. B. Required Water System Improvements: it appears the existing Watermain System is adequate and additional offsite system improvements will not be necessary for the construction of this project. WASD will determine the exact points of connection. WASD will require the 12 inch loop be maintained if portions of the existing loop must be relocated for the new development. The proposed project should connect to the 12 inch watermain to obtain Domestic Water, Fire Protection and Landscape Irrigation service. C. Anticipated Water Use: The water use requirements for this project are calculated based on the build -out information previously described. An additional flow demand of 75,000 GPD for the residential development is expected from this project. For determination of anticipated flows see Exhibit "C" Civil and Environmental Engineering • Permitting and Management • • • EDC Corp. Environmental Development Consultants Corporation 2455 SW 27"t' Avenue, Suite 300 305.858.8100 PH , 305.858.4760 FAX Miami, Florida 4. Sewer Collection System A. Existing Sanitary Sewer System Facilities: Miami -Dade Water & Sewer Department (MD-WASD) owns and operates the following sanitary sewer facilities in the vicinity of this project: A 10 inch gravity sewer discharges to a MDWASD Regional Lift Station No. 64 located at the corner of South Bayshore Drive and the easterly extension of Halissee Street. This lift station transmits flows via an 8 inch forcemain to a 16 inch gravity sewer located at South Bayshore Drive and Alatka Street, The Mercy Hospital complex is comprised of a series of private gravity sewers and private lift stations that are conveyed to the 10 inch gravity sewer B. Required Sanitary Sewer System Improvements: MD-WASD Sewer System requirements: Wastewater upgrades are required to provide service to the proposed development. Several scenarios have been discussed with WASD engineers. The first alternative is to construct a new private lift station and forcemain that will discharge to PS No. 64 or the 10 inch gravity line. The second alternative is to construct a new regional lift station and forcemain and to dedicate the system to WASD for ownership and maintenance. The third alternative is to determine the feasibility of construction a new gravity sewer line along the private access road extension of Halissee Street and connect to PS. No. 64. All three must be investigated in order to determine the most feasible and cost effective design. Discussions are still ongoing with WASD staff. C. Transmission Capacity Requirements The Wastewater generated by this project will be conveyed to MD-WASD Regional Pump Station No. 64. This station yearly NAPOT varies, but on average runs 3.1 hours per day for the e Quarter of 2006, according to DERM. (See Exhibit "C). The current ET data as of April 2006 reflects 3.14 hours. With an additional flow of 75,000 gallons per day generated by this project, the station will increase by 0..01 hours to 3.15 hours. The above referenced pump station has sufficient available capacity to support this project. Flows from this Pump Station are transmitted to the MD-WASD Treatment Plant at Virginia Key. Civil and Environmental Engineering • Permitting and Management 6 • • • EDC Corp. Environmental Development Consultants Corporation 2455 SW 271" Avenue, Suite 300 Miami, Florida 5. Solid Waste Generation 305.858.8100 PH • 305.858.4760 FAX A. Solid Waste Generated by this project will be collected in standardized onsite containers for refuse and recycle. Either hauling companies arid/or the City of Miami Solid Waste Department will provide regular pick- up services. The anticipated daily solid waste generation for thisproject is 8 CY per day (See Appendix Civil and Environmental Engineering • Permitting and Management • • • EDC Corp. Environmental Development Consultants Corporation 2455 SW 27tn Avenue, Suite 300 305.858.8100 PH • 305,858.4760 FAX Miami, Florida EXHIBITS Civil and Environmental Engineering • Permitting and Management • • • EDC Corp. Environmental Development Consultants Corporation 2455 SW 27''' Avenue, Suite 300 Miami, Florida EXHIBIT "A" LOCATION MAP 305.858.8100 PH 305.858.4760 FAX Civil and Environmental Engineering • Permitting and Management • • • EDC Corp. Environmental Development Consultants Corporation 2455 SW 27''' Avenue, Suite 300 Miami, Florida 305,858.8100 PH . 305.858.4760 FAX Civil and Environmental Engineering . Permitting and Management 10 • • EDC Corp. Environmental Development Consultants Corporation 2455 SW 27' Avenue, Suite 300 305,858.8100 PH 305.858.4760 FAX Miami, Florida EXHIBIT "B" Storm Drainage Calculations Civil and Environmental Engineering • Permitting and Management 11 EDC Corp. Environmental Development Consultants Corporation 2455 SW 27`h Avenue. Suite 300 305.858.8100 PH • 305.858.4760 FAX Miami, Florida STORMWATER WELL CALCULATIONS 300 Grove Bay Residences DATE: May 2006 SITE DATA: SITE AREA BUILDING FOOT PRINT BUILDING HEIGHT BUILDING WALL AREA CONTRIBUTING BUILDING AREA (33%) CONTRIBUTING AREA LOWEST ADJACENT GRADE (Varies 7 to 13) RUN OFF COEFFICIENT WELL DATA: 6.72 Acres 0.58 Acres 1.16 Acres 5.63 Acres 1.88 Acres 8.47 Acres 5.30 Ft. 0.86 WELL DISCHARGE RATE PER .FT OF HEAD 750 GPM NUMBER OF WELLS 8 TOTAL WELL DISCHARGE RATE PER FT OF HEAD 6000 GPM/FT. MEAN HIGH TIDE ELEVATION MHWL 1.5 Ft. GVD WELL DIAMETER 24 Inches SPECIFIC GRAVITY LOSS (SG) 1.5 Feet DESIGN STORM: FDOT 100 Year 1 Hour PEAK RUNOFF TIME OF CONCENTRATION Civil and Environmental Engineering • Permitting and Management 5.1 IN/HR 35.65 CFS 20 MIN 12 • • • EDC Corp. Environmental Development Consultants Corporation 2455 SW 27th Avenue, Suite 300 Miami, Florida 305.858,8100 PH • 305.858,4760 FAX EXHIBIT "C" Miami Dade Water Atlas Miami Dade Sewer Atlas Proposed Water Use Calculations DERM Pump Station Monthly Information Civil and Environmental Engineering • Permitting and Management 13 • • EDC Corp. Environmental Development Consultants Corporation 2455 SW 27th Avenue, Suite 300 Miami, Florida .7572 305.858.8100 PH 305.858.4760 FAX 3 QW 2502-17.:1\ `P 'Y4 tCRYA MUSEUM & GARDE FPre.240z ,PARKII5G AREA MIAMI-DADE WATER ATLAS 151.4313• v- \ YW'CD<r2E3 YZ "4,45 -5,5555,44547,44. Civil and Environmental Engineering ° Permitting and Management 14 EDC Corp. Environmental Development Consultants Corporation 2455 SW 27'h Avenue, Suite 300 305.858.8100 PH ° 305.858.4760 FAX Miami, Florida MIAM-DARE SEWER ATLAS 15 Civil and Environmental Engineering • Permitting and Management fb • EDC Corp. Environmental Development Consultants Corporation 2455 SW 27th Avenue, Suite 300 Miami, Florida PROPOSED WATER USE CALCULATIONS 300 Grove Bay Residences May 2006 305.858.8100 PH • 305.858.4760 FAX TYPE OF BUILDING USE No. Units RATE (GPD) ADF (GPD) CONDOMINIUM UNITS Assume no credits for existing development (Conservative estimate) 300 250 75,000 NET Consumption: 75,000 Civil and Environmental Engineering ° Permitting and Management 16 • EDC Corp. 2455 SW 27'rl Avenue, Suite 300 Miami, Florida Environmental Development Consultants Corporation 305.858.8100 PH 305.858.4760 FAX Pump Station Monthly information Station..?0 -0064 Atlas Pg..60.6 MIAMI DADS WATER & SEWER DEPARTMENT Addr..2 BATSUORE DR RAMMER ST Sec -Township -Range 24-54-41 Genr.0 ET clock.! Telm.N iPumps. 2 Pump Type.8 Stn Class.1, Speea.1 arspwr.:. Res flow(gpd) Proj Mapot Cap Plans.. 0 3.49 hrs 34.90 Date Mo.NAPOT Avg Daily Regard Reading 04112/2006 3.14 3.14 410012006 3.00 -- 3,00 0..2 '...,-.! . 3.12 3.12 01/11/2 3.23 3.23 1211412405 3.20 344 Y 4.1161.005 5.10 $,IP Y XV112124n 3.77 3.77 Y SignatUrt..NEUrdAR GOLD/A Station I<m>provement GOLD/8 GOLD/D <D>ownstream Station GOLDIG Codes & Cata<g>ories GOLD/T Y Y <Plan Review> Moratorium. .0IC Moratorium effective since 11/17/2003 Yearly NAPOT (hrs) 3.49 Stn Gross Capacity(gpd).. 864,000 Station Reduction Factor 1.00 Stn Net Cap Certif(gpd).. 0 Stn Net Capacity(gpd).... 864,000 Indicated Flows(gpd) 125,640 Number of pumps 2 2 2 Sign Date..11/29/2004 -08153455.34 <S>tation Inform. GOLD!U <10>pstream Station QOLD/P AP>ump Information Sewer Cer<t>ification Comments PUMP STATION REPORT Civil and Environmental Engineering Permitting and Management t7 • • EDC Corp. Environmental Development Consultants Corporation 2455 SW 27th Avenue, Suite 300 305.858.8100 PH 305,858.4760 FAX Miami, Honda EXHIBIT "D" Solid Waste Generation Calculations Civil and Environmental Engineering • Permitting and Management 18 • • EDC Corp. Environmental Development Consultants Corporation 2455 SW 27th Avenue, Suite 300 Miami, Florida 305.858.8100 PH • 305.858.4760 FAX PROPOSED SOLID WASTE CALCULATIONS PROJECT 300 Grove Bay Residences May 2006 TYPE OF BUILDING USE UNITS/ (SEATS) RATE (Pounds) SOLID WASTE GENERATED (lb) SOLID WASTE GENERATED (tons) CONDOMINIUM 300 8 2,400 1.2 NET INCREASE: 2,400 1.2 ANTICIPATED SOLID WASTE VOLUME AT 7 CY PER TON: 8.4 Cubic Yards per Day I1MainIMA1N DEDC Project-Fifes124401 - 03 - Mercy Al! Towers\MUSPIMUSP Mercy4MUSP Study Mercy May 2006. dac Civil and Environmental Engineering ' Permitting and Management 19