South Dade Landfill
Miami-Dade County's South Dade Landfill (SDLF) is a 300-acre Class I (garbage) landfill located in the southeastern portion of Miami-Dade County. The SDLF is located adjacent to the South District Wastewater Treatment Plant, the Blackpoint Marina and Biscayne Bay on land owned by Miami-Dade County. The location also houses the South Dade Home Chemical Collection Center.
The SDLF has five cells; three cells have already been filled and closed. The fourth cell is the active cell, and construction of the fifth cell is underway. The landfill accepts a variety of waste, including garbage, shredded tires, animal carcasses, trash and yard trash, construction and demolition debris and asbestos (asbestos disposal requires authorization from the Department of Regulatory and Economic Resources and prior arrangement with the SDLF). Disposal capacity at the facility is anticipated to last through 2029.
In addition to its function as a final disposal site, the SDLF has a transfer operation. Waste delivered by County, municipal and private waste haulers is unloaded on the tipping floor, a special area where waste is unloaded and then sorted. Some of this waste will be buried at the SDLF, while most is typically loaded into 85-cubic yard transfer vehicles for transport to the waste-to-energy operation at the Resources Recovery Facility.
Waste which is destined to be buried at the SDLF is taken to an active cell (currently, cell 4). There, it is deposited and then compacted so it takes up the smallest space possible. At the end of each working day, the waste that is compacted is covered (usually with soil or unders, which are tiny particles such as soil, rock, grit and broken glass that cannot be processed at the Resources Recovery Facility.
The landfill has been designed using the latest technology which includes a synthetic liner system, a leachate collection system, and a groundwater monitoring and treatment system. A sequencing batch reactor-industrial processing tanks for the treatment of wastewater-is used to treat leachate generated on site before it is pumped to the adjacent waste water treatment facility for further treatment. When a cell reaches capacity, it is properly closed following federal and state regulations.
Closure activities include the installation of a final cover system that contains geosynthetic materials and soil layers, storm water drainage, landfill gas collection and associated piping.
A byproduct of decomposing waste is landfill gas, which is typically made up of approximately 50 percent methane gas, approximately 50 percent carbon dioxide and other trace substances. The SDLF's closed cells include a series of wells to extract this gas. The gas is burned off at a flare located at the northern end of the landfill.
A gas-to-energy recovery facility is being constructed at the neighboring Miami-Dade County Water and Sewer Department's wastewater treatment facility. Landfill gas will be piped to the recovery facility where it will be combined with gas from the wastewater treatment facility. The combined gases will be converted into electricity to power operations at the wastewater treatment plant.
The SDLF is also one of several sites in our disposal system that has been converted into a natural habitat and wetland area for native plants and varied wildlife. South Dade's 54 acres of restored wetlands are home to dozens of species of plants and wildlife including the American Alligator and the Bald Eagle.
Address: 23707 SW 97th Ave., Gate A, Miami, FL 33032
Days & hours of operation: seven days a week, from 7 a.m. to 5 p.m.
Facts and Figures
- Construction on the facility began in early 1978 and the first waste was landfilled in 1979.
- The original facility included a shredding plant that became operational in 1981. The shredding plant was later closed because of advances in landfill equipment that improve landfill operations.
- The SDLF has a permitted height of 150 feet.
- Cells 1 and 2 are approximately 60 combined acres.
- Cell 3 consists of 50 acres.
- Cell 4 is the active cell and consists of 50 acres.
- Cell 5 has 50 acres available for future disposal.
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