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Home My WebLink AboutSite Utility Study• • • Site Utility Study 2121 BISCAYNE BOULEVARD PROPOSED CONDOMINIUM AND RETAIL TOWER SITE UTILITY STUDY MARCH 2006 March 2006 EDC CORPORATION • • • 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: A Location Map 9 B Storm Drainage Calculations 11 C MD-WASAD Water Atlas 13 MD -Sewer Atlas 14 Proposed Water Use Calculations 15 DERM Pump Station Report 16 D Solid Waste Generation Calculations 18 March 2006 EDC CORPORATION • • • I. General A. Project Location and Size The proposed project consists of a Residential Condominium and Retail Tower to be constructed at an approximately 0.98 acre site located at 2121 Biscayne Boulevard, Miami, Fi. (See Exhibit A). The project is bounded to the west by Biscayne Boulevard, to the south by NE 21st Street, all being in Section 30, Township 53 South, Range 42 East, Miami -Dade County, Florida. The site is vacant, in its present condition. B. Proposed project build out: The proposed project build -out consists of 147 residential condominium units and 6,682 square feet of retail. March 2006 3 EDC CORPORATION A • • 2. Storm Drainage System A. Existing Storm Drainage System: Roadway storm drainage systems presently exist along the streets surrounding the proposed project. These systems are owned and maintained by the City of Miami. The site, in its existing or proposed conditions, does not or will not contribute any significant amount of storm water run-off into the Public Roadway System. 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 of sidewalk improvements. B. Proposed On -Site Storm Drainage System: The proposed storm drainage system to serve this project will be designed to fully contain the storm water run-off on -site and to meet the Miami -Dade County Department of Environmental Resources Management (DERM), and the Florida Department of Transportation (FDOT) requirements. This will be accomplished by means of 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 experienced well drilling companies with other projects in the vicinity, an approximate well discharge rate of 750 gpm per foot of head can be expected. Stormwater 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. C. Required number of Wells: The proposed wells will be designed to retain the total run-off during the 5-year, 1 day storm; and to provide increased drainage capacity during the 25-year, 3-day storm over pre-existing conditions. Based on the attached calculations, a total of 1 storm drainage well is required to provide full on - site • retention for this .project deperidiag .on the actual yields obtained during the well drilling operations. For Well Disposal System calculations refer to attached Exhibit "B". March 2006 4 EDC CORPORATION • • • 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 6-inch water main on NE 21s' Street that runs along the entire front side of the property. • An existing 16-inch water main on Biscayne Boulevard that runs along the entire front side of the property. B. Required Water System Improvements: It appears that the existing watermain system is not adequate and additional offsite system improvements will be necessary for the construction of this project. A 12 inch water main extension will be required on NE 21st Street and a new fire hydrant will also be required on the NE corner of Biscayne Blvd and NE 21st Street. 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 37,084 GPD for the residential and retail components is expected from this project. For determination of anticipated flows see Exhibit "C". March 2006 EDC CORPORATION e • • 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: • An existing 10-inch gravity sewer line along NE 21st Street that runs along the entire front of this property. This line collects all the sanitary flows from the general area and directs them to the 72-inch interceptor gravity sewer line. An existing 10-inch gravity sewer line along Biscayne Boulevard that runs along the entire front of this property. This line collects all the sanitary flows from the general area and directs them to the 72-inch interceptor gravity sewer line. B. Required Sanitary Sewer System Improvements: MD-WASD Gravity Sewer System requirements: It appears that the existing sanitary sewer collection system is adequate. Additional offsite system improvements may be required for the construction of this project (Based on MOWSD studies). The proposed project should connect to the existing 10-inch gravity main on NE 21st Street to obtain sanitary sewer service. C. Transmission Capacity Requirements The wastewater generated by this project will be conveyed to MD-WASD Regional Pump Station No. 02. This station has a yearly NAPOT of 4.266 hours per day respectively according to DERM. (See Exhibit "C). The current ET data as of February 2006 reflects 4.266 hours. With an additional flow of 37,084 gallons per day generated by this project, the station will only increase by 0.021 hours to 4287 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. March 200& 6 EDC CORPORATION • • • 5. Solid Waste Generation A. Solid waste generated by this project will be collected in standardized onsite containers for refuse and recycle. Either hauling companies and/or the City of Miami Solid Waste Department will provide regular pick-up services. The anticipated daily solid waste generation for this project is 8.33 CY per day (See Appendix "D"). March 2006 7 EDC CORPORATION • • Exhibit "A" EXHIBIT "A" LOCATION MAP March 2006 EDC CORPORATION • • LOCATION MAP Location Map March 2006 EDC CORPORATION • • Exhibit "B" EXHIBIT "B" Storm Drainage Calculations March zoos 10 EDC CORPORATION • • • Stormwater Well Calculations STORMWATER WELL CALCULATIONS DATE: March 2006 SITE DATA: SITE AREA ±0.98 Acres PERVIOUS AREA (GREEN SPACE) 0.16 Acres BUILDING FOOT PRINT 0.82 Acres BUILDING HEIGHT 170 Feet BUILDING SIDE WALL AREA 2.24 Acres CONTRIBUTING AREA (1/3 SIDE AREA) 0.28 Acres TOTAL DRAINAGE AREA 1.27 Acres LOWEST ADJACENT GRADE -4.93 Feet RUN OFF COEFFICIENT 0.82 WELL DATA: WELL DISCHARGE RATE PER .FT OF HEAD 750 GPM NUMBER OF WELLS 1 TOTAL WELL DISCHARGE RATE PER FT OF HEAD 750 GPM/WELL MEAN HIGH TIDE ELEVATION MHWL 1.5 FT, NGVD WELL DIAMETER 24 Inches SPECIFIC GRAVITY LOSS (SG) 1.5 Feet DESIGN STORM: FOOT 100 Year, 1-hour 5.1 IN/HR PEAK RUN-OFF 3.34 CFS TIME OF CONCENTRATION 20 MIN March 2006 1 EDC CORPORATIO • • • Exhibit "C" EXHIBIT "C" Miami Dade Water Atlas Miami Dade Sewer Atlas Proposed Water Use Calculations DERM Pump Station Monthly Information March 2006 12 EOC CORPORATION • • Miami -Dade Water Atlas crovN MIA I I DADEWATE A> March 2006 13 EDC CORPORA11ON • • Miami -Dade Sewer Atlas MIAMI-DADE SEWER ATLAS March 2006 EDC CORPORATION • • • Proposed Water Use Calculations PROPOSED WATER USE CALCULATIONS DATE: March 2006 TYPE OF BUILDING USE t No. Units/sft RATE (Gpd) ADF (Gpd) CONDOMINIUM UNITS 147 250 36,750 RETAIL 6,682 sft 5/100 SF 334 NET INCREASE: 37,084 March 2006 / 5 EDC CORPORATION • • • DERM Pump Station Monthly Information *2004051114052558*CAMPAJO ent. * DERM NOPT Run February, 2006 M Stat Station Station Current Delta Projected R Type Owner Number ET (Hrs) ET (Hrs) ET (Hrs) Proposed Number of gallons (gpd): 37,084 *******************a********** Downstream Stations *********'*********a:*x********************.**********n,r*,t OK A5RM+ 30 0002 4.266 .021 4.287 AC 30 CD 1002.03 .01 1002.04 AC 30 RS 1002.05 .00 1002.05 iN 30 RS95APR 1001.77 .00 1001.77 IN 30 RS94MARCH 1001.90 .00 1001.91 March 2006 16 EDC CORPORATION • • • Exhibit "D" EXHIBIT "D" Solid Waste Generation Calculations March 2006 17 EDC CORPORATION • • • posed Solid Waste Calculations Project PROPOSED SOLID WASTE CALCULATIONS PROJECT DATE: March 2006 TYPE OF BUILDING USE UNITS RATE (Pounds) SOLID WASTE GENERATE❑ (lb) SOLID WASTE GENERATED (tons) CONDOMINIUM 147 8 1,176 1.17 RETAIL 1 2 2 0.02 NET INCREASE: 1.19 ANTICIPATED SOLI D WASTE VOLUME AT 7 CY PER TON: 8.33 Cubic Yards per Day UUMainlmain dEEDCProjectFilesl24301 - 2121 Biscayne BoulevardiMUSPMUSPStudy 2121 Biscayne Blvd 2006-03-13.doc March2006 tg EDC CORPORATION