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Puente Hills Landfill


Puente Hills Landfill: 2020’s Largest Landfill in the U.S.

The Puente Hills Landfill in Los Angeles County, California, is more than just a former mountain of waste. It’s a testament to human ingenuity, a beacon of environmental progress, and a prime example of the solid waste industry’s shift toward sustainability. 

Once a Towering Trash Titan:

  • At its peak, Puente Hills was the largest landfill in the United States, towering over 500 feet (150 meters) and spanning 700 acres – roughly the size of New York City’s Central Park!
  • Can you imagine the sheer volume of garbage it gobbled up? This behemoth consumed a whopping four million tons of waste annually, the equivalent of 40 million adult elephants!

Harnessing Trash Power:

  • Puente Hills wasn’t just a passive dump but a powerhouse of renewable energy. By capturing and converting landfill gas into electricity, the facility generated over 40 megawatts of power – enough to illuminate over 30,000 homes!
  • Learn more: energyvistas.com/gas-to-energy.php)

Geosynthetics: The Silent Heroes:

  • The stability and environmental integrity of Puente Hills relied heavily on geosynthetics. Specialized materials, like liners, drainage mats, geomembranes, and geogrids, are vital to: 
    • Containing leachate: Preventing harmful liquids from seeping into the surrounding environment.
    • Promoting drainage: Ensuring proper water flow within the landfill to prevent oversaturation and instability.
    • Enhancing stability: Reinforcing the landfill structure and minimizing the risk of slope failures.

From Dump to Park: A Greener Future:

  • Puente Hills’ story doesn’t end with mountains of trash. Today, it’s undergoing an incredible transformation into the Puente Hills Landfill Park. This project aims to create a 1,400-acre public park with hiking trails, wildlife habitats, and educational centers.
  • This metamorphosis symbolizes the solid waste industry’s shift towards responsible waste management and environmental stewardship. Learn More: puentehillslandfillpark.org/

The Los Angeles County Sanitation Districts are at the forefront of converting waste into resources. (www.lacsd.org/home) COMANCO Environmental, with its expertise in landfill gas management, can help other waste facilities tap into this green energy source, reducing their reliance on fossil fuels and contributing to a cleaner future.

As a leading geosynthetics and installation services provider, COMANCO is proud to contribute to the safe and sustainable operation of landfills like Puente Hills nationwide. Our team of experts is committed to being a part of this positive change, providing solutions that minimize waste while promoting sustainability and community well-being.

Contact COMANCO today for a free quote on your next Geosynthetic Project. (813) 988-8829 | www.comanco.com


COMANCO is a leading environmental, commercial, and civil construction company specializing in constructing containment facilities. 

Are you interested in COMANCO’s worldwide impact? Our Geosynthetic installations aid a wide variety of industries across the globe. Explore our services to see how we can help your industry achieve sustainable outcomes. 

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*Image courtesy of https://puentehillslandfillpark.org/