It took nearly 30 years to fill this parcel of land with residential trash. It took just three months to reduce the size of the pile by about a third.
The Hopkins landfill ranked number one on the MPCA Closed Landfill Program’s risk priority list for remedial response, due to the potential of methane gas migration and the close proximity of a large number of homes to the landfill.
The landfill was opened in October, so work could be done in the fall and winter to minimize any smell.
During those three months, the MPCA:
- Moved approximately 310,000 cubic yards of waste from the edges to the middle of the site.
- Reduced the footprint of the landfill from 26 acres to 16 acres.
- Installed a new cover that meets current standards.
- Replaced the active gas extraction system to increase efficiency and to better control landfill gas migration.
- Improved surface water drainage at the site.
- Installed two passive vents between the landfill and Raspberry Woods to vent a methane pocket.
Once work was done, the site was capped with a thick plastic cover topped by two feet of soil.
For more information
The MPCA's Closed Landfill Program, established by the Legislature in 1994, is charged with properly closing, monitoring, and maintaining Minnesota's closed municipal sanitary landfills. There are currently 109 closed landfills in the program.
Find out more about closed landfills.