Greenville County's Twin Chimneys Landfill is located on 1,155 acres at 11075 Augusta Road
in southern Greenville County. The landfill is a state of the art Subtitle D landfill
to handle municipal solid waste generated in and around the county.
In addition to the garbage disposal areas of the landfill, Twin Chimneys has a Residential
Household Waste and Recycling Facility for use by citizens wanting to dispose of their own
Commercial garbage trucks are routed directly to the disposal area after passing over
a scale that records the trucks tonnage so that appropriate fees may be charged. All
commercial haulers and businesses are assessed a fee to dispose of waste at the landfill.
The Twin Chimneys landfill is constructed in accordance with the requirements of the
Resource Conservation and Recovery Act (RCRA) in order to minimize impacts to groundwater
and the surrounding environment through the escape of leachate, methane gas, and the
The landfill is comprised of seven areas suitable for disposal operations. We refer to
these areas as Units. The units vary in size and shape due to the application of
technical requirements like setbacks from wetlands and property lines, utilities and
road infrastructure. Within each of these units smaller cells are constructed as the
fill sequence progresses. The liner system within each new cell we construct is connected
to the previous cell until floor of the entire unit is protected by the liner system.
As each Unit reaches design capacity, we discontinue waste acceptance. At this point
we begin post closure activities. This includes installation of a liner system similar
to the liner applied to the floor of the Unit. When complete, the floor and the top
of the landfill will be connected, enclosing the entire Unit with a watertight
A cross section of the Twin Chimneys Landfill shows the clay liner, geosynthetic
liner, and leachate collection pipes that are in-place to reduce impacts to the
groundwater as the waste begins to decompose.
The leachate collected in these pipes is pumped to holding tanks where it is
initially treated by aeration then it is pumped into tankers and hauled to
Renewable Water Resources (ReWa) for final treatment.
At the end of each day the waste is covered with a layer of soil or an
approved alternate daily cover to prevent trash from blowing away, control
odors, and prevent animals (such as birds, dogs, and rodents) from scavenging
in the waste.
As layers of waste are placed within the landfill footprint methane
pipes are installed to vent the gas that builds up in the decomposing waste.
At the Enoree Landfill, which closed in early 2007, these pipes are being
connected together so that the methane gas can be captured and sold for power
When the landfill has reached its capacity a cap will be placed over
the cells to prevent rainwater from percolating into the decomposing waste.
Groundwater monitoring wells are installed around the perimeter of
the landfill prior to the acceptance of any waste. Groundwater samples
are routinely collected from these wells and analyzed to monitor the groundwater
quality. In accordance with RCRA regulations for Subtitle D landfills, the
groundwater quality will continue to be monitored through the collection of
samples from these wells throughout the active life of the landfill and for
30 years after the landfill has reached capacity and been closed.