Facts About the Landfill
The Bi-County Landfill,
which must have all solid waste disposal areas permitted by the Tennessee
Department of Environment and Conservation (TDEC), has ample land acreage
available to provide necessary services.
Bi-County sits on over 550
acres of land. Seventy-five (75) acres is closed and fifty-three (53) acres are
currently being used. New sections were opened in 2007. A new liner system is
being constructed for use this winter.
A two foot thick
re-compacted clay liner, meeting strict standards, overlain with a 60
milliliter Flexible Membrane Liner, made of HDPE plastic, with a leachate
(liquids) collection system is used. All leachate is collected and transported
off site for treatment and disposal at a permitted aqueous waste treatment
facility. Pilot tests are being done on leachate to clean it up enough to be
used to spray irrigate.
Ground Water Monitoring
Ground water monitoring wells are placed strategically around the
site. Background tests were done and now semi-annual tests are being
conducted. A voluntary monitoring program is being done at a closed
section on our site.
Quarterly monitoring is done over the entire site in addition to strategically placed monitoring probes throughout the site.
Additional Facts About Bi-County
Fact: Because of the land swap with Fort Campbell in 2008, our landfill has at least seven decades of life remaining. The anticipated timeline of where we are as well as our intermediate and long term plans are as follows:
- Preparing the permitting on another location that will provide 4 additional years bringing us into 2023.
- As these sections are prepared, we will continue going through the necessary processes and planning to start developing the Fort Campbell land that was acquired through a land swap. The larger portion of the land is expected to provide almost 70 more years of space once the permitting has been approved.
Fact: Refuse from residents in Montgomery and Stewart Counties as well as Fort Campbell will continue to go to the Bi-County landfill as usual. There are no immediate or long-term plans to send the trash to any other location.
Fact: In 1994 Bi-County began to operate as an enterprise fund, no longer using tax dollars. Since then, the funding sources for Bi-County have been through user fees, tipping fees and recycling income.
Fact: A landfill is very different than a dump. Dumps are a thing of the past and are illegal in the United States because of environmental concerns. Prepping, operating and maintaining a landfill is a lengthy, complex and ongoing process. The primary objective of a landfill site is to provide effective control measures to prevent or reduce negative effects on the environment, in particular the pollution of surface water, groundwater, soil and air.
Fact: Landfill Space refers to the amount of acreage that is available for the permitting process. Once landfill space is permitted for the acceptance of waste, AirSpace is how much trash can go into that permitted area (going upward into the air). Landfill space must be tested, prepared and permitted before it can be used for waste disposal. Permitting a landfill requires a lengthy permitting process that must be done in sections, not all at one time.
Fact: If you pay a private company to pick-up your trash, you are paying for the convenience of using their services to pick up your trash not the landfill user fee. The User Fee is used to cover costs of convenience center operations. Centers are subsidized by tipping fees as well. The convenience/recycling centers are open to all Montgomery and Stewart County residents for trash drop off and recycling. The main landfill is open to residents for large items/loads that trash services cannot handle, latex paint, and electronics. Residents also have access to Household Hazardous Waste Collection days at no additional cost.
Fact: Running a landfill is a major responsibility that requires complex processes, procedures and policies. A landfill is a commodity that all communities need. Gone are the days when you would find an unused piece of land and just start throwing in your trash.
Steps in preparing a landfill site:
- Identify the area that will be used on the landfill site
- Perform geological studies
- Perform an environmental study
- Perform engineering studies
- Excavate designated area
How a landfill is constructed:
- Groundwater. Geologists look for the groundwater table and work up from there.
- Soil is removed to a subgrade level
- Compacted clay – (Clay must be compacted in layers. Six inches per layer until a two foot clay liner has been installed and meets specific standards.)
- Plastic liner – a 60 mi. HDPE plastic liner is installed. The liner has to be welded into one solid piece.) Another geo-textile liner is installed for added protection.
- Leachate collection piping system is installed.
- Washed Stone - A layer of washed stone is installed. The stone has a dual purpose: 1. Protecting the liners when trucks and equipment are present and as a filtration system for leachate (see explanation below)
- Gas Venting - As trash decomposes it produces Methane Gas. Therefore, a gas piping system is installed to collect the gas for the generation of electricity.
- Trash/Garbage - Now the site is ready to accept and process the trash/garbage.
- Daily Cover - The trash/garbage must be covered daily to minimize odor, animal scavenging, and wind. Bi-County uses a daily cover material and covers with soil as required by the State every 14 days. Soil coverage takes available air space, but is required.
- Leachate– leachate is any liquid that comes in contact with the trash such as rain water or the juices produced when garbage decomposes. Leachate filters through the stone into a collection system where it is pumped into a treatment lagoon.
Fact: We are not running out of landfill space. Our permitting is taking longer than anticipated because of challenges with the permitting process. Professionals from the Tennessee Department of Environment and Conservation along with a private engineering company are working diligently with Bi-County personnel to finish preparing and permitting various areas of the site to handle more waste.
Fact: Whether the landfill receives 400 tons of garbage a day or 700 tons of garbage per day, it takes the same amount of personnel and time to handle the trash. The volume makes no difference.
Fact: We can all make a difference. Reducing the amount of garbage you create and recycling are helpful. Recycling in our community currently saves two days of space per month.
Fact: As Bi-County looks at alternatives to accepting trash from outside counties, which has been the main source of keeping landfill user fees and tipping fees low, one of the options is to increase the tipping fee to private haulers by $5 per ton. The average household size in Clarksville is 2.9. If rates are passed on proportionately to customer households (based on average household size) there would be an increase of approximately $12 per year or $1 per month per family.
Fact: Bi-County landfill tipping fees also known in other landfills as gate fees are lower than more than 2/3rds of landfills across the U.S. It is challenging to compare the rates because communities charge these fees in many different ways. Our neighbors in Dickson County pay $10 a month in user fees, in some counties residents are charged for each bag of trash or by the weight and in other places residents are charged a landfill fee as well as additional charges for items that they bring to the landfill.
Average monthly garbage rates in the United States are between $40-$42 per month, partially caused by high tipping fees. Clarksville-Montgomery County residents pay an average of $15 per month for the convenience of garbage pick-up.
Fact: A landfill site is required to be monitored and maintained for 30 years after closure.