MONTEREY PENINSULA LANDFILL
The 470 acre MRWMD site includes the 315 acre Monterey Peninsula Landfill (MPL). The Solid Waste Facility Permit for the District operation states that the peak traffic volume for incoming waste materials shall not exceed 2,000 trips per day, and the peak tonnage of incoming waste shall not exceed 3,500 tons per day. The MPL currently receives approximately 300,000 tons per year (less than 1,000 tons per day) of municipal solid waste for disposal.
The District is responsible for implementing environmental controls and monitoring activities at the site, and for funding and overseeing design efforts and capital construction improvements to comply with regulatory requirements. The MPL has a design airspace (volume of available airspace for placement of waste and daily/intermediate/final cover soil) of approximately 84 million cubic yards (CY). The remaining landfill waste capacity is approximately 71 million CY, or 48 million tons (assuming an Airspace Utilization Factor of 0.676 tons per CY). The MPL is projected to reach its full capacity in the year 2161. A number of factors affect the actual site life of the landfill. These factors include:
- Variations in waste tonnage accepted such as attracting waste from or losing waste to other landfills due to tipping fee variations.
- Variations in the rate of population growth in the service area.
- Changes in waste generation rates due to fluctuations in source reduction and recycling volumes.
- Strength of the economy affecting commercial and agricultural waste generation rates.
Because the precise nature and effects of these factors cannot be predicted with certainty, the actual site life of a landfill may vary. At current rates, the Monterey Peninsula Landfill has a life expectancy of 150 years ensuring that the Greater Peninsula region has ample disposal capacity well into the future. New developments in recycling and diversion in the coming years are anticipated to add additional life expectancy to the MPL disposal site.
New Landfill Liner Engineering Project 2013
Construction of a new 23-acre lined landfill module was completed in June 2013 on the 470–acre MRWMD site. This lined landfill module has a waste capacity of approximately 5,000,000 tons and a service life of approximately 17 years. The central feature of the module is an engineered composite liner system consisting of a 2 foot thick compacted clay base layer, overlain by a 60-mil thick high density polyethylene geomembrane. Placed directly over the composite liner is a leachate collection and removal system consisting of a 1- foot thick sand drainage layer and a series of perforated HDPE pipes bedded in gravel and wrapped in geotextile, which conveys leachate from the liner floor to a sump where it can be removed by a pumping system. A 2 foot thick layer of bio-solids and green waste mix is placed over the sand drainage layer to further protect the liner from damage during placement of the first layer of waste.
MRWMD’s Bird Abatement Program Since 2010
“Nature controlling nature”, is what Leo Valesquesz, the onsite falconer says about the work of his team of trained birds (falcons and hawks) used during operational hours at the landfill, to keep the birds (especially sea gulls) literally “at bay”. Watch the video to learn more.
Waste to Energy
The District’s landfill gas to energy project has been producing electricity from waste since 1983. Today, the project’s four engine generators provide approximately 5 megawatts of clean renewable power, meeting all the District’s own power needs and supplying electricity for nearly 4,000 homes. (Read More)