Water Supply Plan - City of Miami

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Water Facilities Master Plan Water Supply Facilities Work Plan A 5-8 KM2740.Sec5a .doc 11/26/2007 blending AADD capacity to the County’s water supply. This project uses the brackish Floridan Aquifer water to blend with the fresh Biscayne Aquifer raw water. MDWASD also anticipates using these wells for occasional storage of fresh Biscayne Aquifer water in the Floridan Aquifer during the wet season for extraction and use in the dry season. To do so, MDWASD designed a ultra-violet (UV) light disinfection system for each ASR site. Project construction costs totaled $6.4 million (for the UV system). 5.2.3 Floridan Aquifer Blending Wellfield at Hialeah-Preston Water Treatment Plants (4.7 MGD) Start 2006 Finish 2010 MDWASD is planning on constructing two Floridan Aquifer blending wells to supply raw water to the Hialeah-Preston WTP complex. This project will further increase AADD capacity by 4.7 MGD by blending the Floridan Aquifer water with the raw water supply at an estimated cost of $10.3 million by 2010. This project is currently under design by MDWASD. 5.2.4 North District Wastewater Treatment Plant (NDWWTP) (7.0 MGD) Start 2007 Finish 2011 This project is a 7 MGD reclaimed water (e.g. purple pipe) irrigation project at the NDWWTP with an estimated cost of $26.8 million and its completion is scheduled for 2011. Part of the reclaimed water will be pumped to the City of North Miami Beach. Approximately 2 MGD will be used to replace a current potable water irrigation in the MDWASD service area as a potable water credit. MDWASD has prepared a NTPC for selecting a Consultant to design the project, and will take the requests to advertise to the December 2007 Board of County Commissioners. 5.2.5 Central District Wastewater Treatment Plant (CDWWTP) (1.0 MGD) Start 2007 Finish 2011 This project is a 1 MGD reclaimed water (e.g. purple pipe) irrigation project at the CDWWTP with an estimated cost of $15.3 million and its completion is scheduled for 2011. The project will replace potable water irrigation at Crandon Park and certain areas of Key Biscayne as a potable water credit. MDWASD has prepared a NTPC for selecting a Consultant to design the project, and will take the requests to advertise to the December 2007 Board of County Commissioners.
Water Facilities Master Plan Water Supply Facilities Work Plan A 5-9 KM2740.Sec5a .doc 11/26/2007 5.2.6 South District Wastewater Treatment Plant (SDWWTP) 5.2.6.1 Phase 1 (18 MGD) Start 2007 Finish 2014 Phase 1 of the Groundwater Replenishment (GWR) project at the South Miami Heights WTP is scheduled to be ready for implementation by 2014 expanding the finished water AADD by 18 MGD at a cost of $357.5 million. MDWASD has prepared a NTPC for selecting a Consultant to design the project, and will take the requests to advertise to the December 2007 Government Operations and Environment Committee Meeting. Design could be completed by mid-2009. This potential certified project will provide advanced treatment of 30 MGD of secondary effluent to produce approximately 23 MGD of highly treated reclaimed water that will be piped to replenish ground water for water supply purposes. The technologies to be used include micro-filtration and reverse osmosis which filters out small particles and uses ultraviolet light for disinfection. High quality water would be piped to areas upgradient of the proposed South Miami Heights wellfield and discharged into the groundwater through underground trenches. Based upon this replenishment of water, more water can be withdrawn and treated for drinking water purposes at this treatment plant. This approach will enable the continuous use of the South Miami Heights WTP, which will be constructed over the next four to five years. 5.2.6.2 Phase 2 (20 MGD) Start 2015 Finish 2021 Phase 2 of the GWR for the Alexander-Orr WTP will add 20 MGD to the water supply with total costs estimated at $482 million. The methodology used at the South Miami Heights WTP will also be used for the Alexander-Orr WTP to replenish groundwater. The GWR at Alexander-Orr, potential certified projects, will be available to initialize operations in 2021. Alternately, MDWASD is looking at the option of constructing a new West District Water Reclamation Plant (WDWRP) to produce high quality recharge water to offset groundwater withdrawals in the Alexander Orr subarea wellfields namely, increased withdrawal at the Southwest Wellfield. This plant is scheduled to come on line in 2020. Alternatively, MDWASD recently completed the Interim Wastewater Facilities Master Plan, which recommends the establishment of the West District Water Reclamation Plant (WDWRP), combined with wastewater storage facilities for peak wet weather conditions in the Central West area of the County.
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City of Miami Water Supply Faciliti
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Page 97: APPENDIX A Wellfield Data Tables
Page 100 and 101: EXHIBIT 2-1 Summary of Construction
Page 109 and 110: TABLE 8 April 2007 SEWER FACILITIES
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Page 116 and 117: 2007 2010 2015 2020 2025 2030 2007
Page 118 and 119: INGRAHAM 8TH South Dade Subarea Eve
Page 121: APPENDIX D Water Use Efficiency Rec
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Water Supply Plan - City of Miami

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