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HomeMy WebLinkAboutSite Utility Study• EDC Corp. Environmental Development Consultants Corporation 2455 SW 27th Avenue, Suite 300 305.858.8100 PH • 305.858.4760 FAX Miami, Florida COASTAL ON THE RIVER PROPOSED CONDOMINIUM SITE UTILITY STUDY APRIL 2005 Civil and Environmental Engineering - Permitting and Management • • EDC Corp. Environmental Development Consultants Corporation 2455 SW 271h 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: "B" Location Map 10 Storm Drainage Calculations 12 "C" MD-WASAD Water Atlas 15 MD -Sewer Atlas 16 Proposed Water Use Calculations 17 DERM Pump Station Report 18 "©„ Solid Waste Generation Calculations 20 Civil and Environmental Engineering • Permitting and Management • • EDC Corp. Environmental Development Consultants Corporation 2455 SW 27th Avenue, Suite 300 Miami, Florida COASTAL ON THE RIVER SITE UTILITY STUDY 1 General A. Project Location and Size 305.858.8100 PH • 305.858.4760 FAX The proposed project consists of a Residential Condominium Tower to be constructed at an approximately 4 acre site located at NW 14th Street and NW 22"d Avenue, Miami I FI. (See Exhibit A). The project is bounded to the north by the Miami River, to the south by NE 14th Street, and to the east by NW 22nd Avenue, all being in Section 34, Township 53 South, Range 41 East, Miami - Dade County, Florida. The site is a marine repair facility, in its present condition. B. Proposed project build out: The proposed project build -out is mixed use and consists of 645 residential condominium units. 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 2. Storm Drainage System A. Existing Storm Drainage System: Roadway storm drainage systems presently exist along the streets surrounding the proposed project. FDOT owns right of way and drainage systems along 22nd Avenue. NW 14th Street and associated drainage 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 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 (FDOT). 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 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. 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 4 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. 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 Miami, Florida 3. Water Distribution System A. Existing Water System Facilities: 305.858.8100 PH • 305.858.4760 FAX Miami -Dade Water & Sewer Department (MD-WASD) owns and operates the following domestic water facilities in the vicinity of this project: • An existing 8-inch water main on NE 14th Street that runs along the entire south side of the property. 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. WASAD will determine the exact points of connection. The proposed project should connect to the 8 inch watermain on NE 14th Street 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 161,250 GPD for the residential component 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 27th 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: • An existing 8-inch gravity sewer line along NW 14th 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 Miami -Dade Water and Sewer Department Pump Station # 0/fit located at B. Required Sanitary Sewer System improvements: MD-WASD Gravity Sewer System requirements: It appears that the existing Sanitary Sewer Collection System is adequate and additional offsite system improvements will not be necessary for the construction of this project. The proposed project should connect to the existing 8-inch gravity main 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. 69. This station has a yearly NAPOT of 4.89 hours per day respectively according to DERM. (See Exhibit "C). The current ET data as of February 2005 reflects 4.89 hours. With an additional flow of, 161,250gallons per day generated by this project, the station will increase by 0.09 hours to 4.98 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 EDC Corp. Environmental Development Consultants Corporation 2455 SW 27 thAvenue, Suite 300 305.858.8100 PH^305.858.4 760 FAX Miami, Florida 5.Solid Waste Generation A. Solid Waste Generated by this project will be collected in standardized onoit* containers for refuse and recycle. Either hauling companies and/or the City of Miami Solid VVuata Department will provide regular pick- upservices. The anticipated daily solid waste generation for Unka'pnojent io18.1 CYper day (See Appendix .[).). Civil and Environmental Engineering ' Permitting and Management • • EDC Corp. Environmental Development Consultants Corporation 2455 SW 27th 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 27th Avenue, Suite 300 Miami, Florida 305.858.8100 PH 305.858.4760 FAX Civil and Environmental Engineering • Permitting and Management 10 • e EDC Corp. Environmental Development Consultants Corporation 2455 SW 27frI 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 27th Avenue, Suite 300 305.858.8100 PH • 305.858.4760 FAX Miami, Florida STORMWATER WELL CALCULATIONS COASTAL ON THE RIVER April 2005 SITE DATA: SITE AREA BUILDING FOOT PRINT BUILDING HEIGHT BUILDING WALL AREA CONTRIBUTING BUILDING AREA (33%) CONTRIBUTING AREA LOWEST ADJACENT GRADE RUN OFF COEFFICIENT WELL DATA: 4.0 Acres 600 Feet 120 Feet 1.65 Acres .55 Acres 4.55 Acres 7.0 Ft. 0.95 WELL DISCHARGE RATE PER .FT OF HEAD 800 GPM NUMBER OF WELLS 4 TOTAL WELL DISCHARGE RATE PER FT OF HEAD 3200 GPM/FT. MEAN HIGH TIDE ELEVATION MHWL 1.5 Ft. GVD WELL DIAMETER 24 Inches SPECIFIC GRAVITY LOSS (SG) 1.0 Feet Civil and Environmental Engineering • Permitting and Management 12 • EDC Corp. Environmental Development Consultants Corporation 2455 SW 271h Avenue, Suite 300 Miami, Florida STORMWATER WELL CALCULATIONS COASTAL ON THE RIVER DATE: APRIL 2005 305.858.8100 PH • 305.858.4760 FAX DESIGN STORM RAINFALL INTENSITY (In/hr) PEAK RUNOFF (cfs) WELL HEAD (feet) SG + MH (feet) STAGE (NGVD) CRITICAL ST AGE: (NGVD) 5 yr- 24 hr 6.17 26.66 3.73 2.5 6.23 25 yr- 72 hr 6.98 30.15 4.23 2.5 6.73 7.0 100 yr. 72 hr 7.44 32.14 4.49 2.5 6.99 MAXIMUM STAGE IS LESS THAN THE MINIMUM PERIMETER GRADE ELEVATION OF 7.0 NGVD. THE NUMBER OF WELLS PROVIDED IS SUFFICIENT TO MAINTAIN THE PEAK STAGE WITHIN THE PROPERTY. ALL WELLS WILL BE INTERCONNECTED TO EQUALIZE THE FLOW BETWEEN THE WELLS. Civil and Environmental Engineering • Permitting and Management 13 • • EDC Corp. Environmental Development Consultants Corporation 2455 SW 27=' Avenue, Suite 300 305.858.8100 PH • 305.858.4760 FAX Miami, Florida 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 • • EDC Corp. 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Environmental Development Consultants Corporation 2455 SW 27th Avenue, Suite 300 Miami, Florida PROPOSED WATER USE CALCULATIONS COASTAL ON THE RIVER APRIL 2005 305.858.8100 PH • 305.858.4760 FAX TYPE OF BUILDING USE No. Units RATE (God) ADF (Gpd) CONDOMINIUM UNITS 645 250 161,250 NET INCREASE: 161,250 Civil and Environmental Engineering • Permitting and Management 17 • • • EDC Corp. Environmental Development Consultants Corporation 2455 SW 27th Avenue, Suite 300 305.858.8100 PH • 305.858.4760 FAX Miami, Florida *2005032513300148 * DERM NOPT Run MARCH, 2005 M Stet Station Station Current Delta Projected R Type Owner Number ET (Hrs) ET (Hrs) ET (Hrs) Proposed Number of gallons (gpd): 161,250 ****************************** Downstream Stations********:r****************:r*,r+*x*********:fx***************:r OK 631 L 30 0069 4.89 .09 4.98 AC 30 CD 1001.73 .02 1001.76 AC 30 RS 1001.72 .01 1001.73 IN 30 RS95APR 1001.49 .01 1001.50 IN 30 RS94MARCH 1001.60 .01 1001,61 Civil and Environmental Engineering • Permitting and Management o • o EDC Corp. Environmental Development Consultants Corporation 2455 SW 27th Avenue, Suite 300 305.858.8100 PH • 305.858.4760 FAX Miami, Florida EXHIBIT "D" Solid Waste Generation Calculations Civil and Environmental Engineering • Permitting and Management 19 • • • EDC Corp. Environmental Development Consultants Corporation 2455 SW 271h Avenue, Suite 300 Miami, Florida 305.858.8100 PH • 305.858.4780 FAX PROPOSED SOLID WASTE CALCULATIONS PROJECT Coastal on the River April 2005 TYPE OF BUILDING USE UNITS/ (SEATS) RATE (Pounds) SOLID WASTE GENERATED (lb) SOLID WASTE GENERATED (tons) CONDOMINIUM 645 8 5,160 2.58 NET INCREASE: 5,160 2.58 ANTICIPATED SOLID WASTE VOLUME AT 7 CY PER TON: 18.1 Cubic Yards per Day I1Mainlmain d1EDC Project-Fites114702- Coastal Fuels SeawatA MUSP Study\MUSP Study Coastal on the River,dac Civil and Environmental Engineering • Permitting and Management 20