- MRC: Municipal Review Committee, Inc. is a non-profit corporation dedicated to ensuring the long-term affordable, environmentally sound disposal of municipal solid waste for its members.
- MWS: Municipal Waste Solutions, the new identity of the Hampden facility
- Fiberight: Fiberight, LLC is the parent company that developed and owns the technology for processing mixed MSW to be installed in the facility in Hampden, Maine.
- Coastal Resources: Coastal Resources of Maine, LLC, the original project company formed by Fiberight to finance, own and operate the Hampden project.
- Crossroads: Crossroads Landfill located in Norridgewock, Maine.
- WM: Waste Management, Inc., the owners of Crossroads, is a waste management company headquartered in Houston, Texas.
- JRL: Juniper Ridge Landfill, owned by the State of Maine and operated by Casella.
- Casella: Casella Waste Systems, a waste management company based in Rutland, Vermont.
- Bridge Waste: MSW being sent to an alternative site on an interim, short-term basis as a result of the Coastal facility not opening on time is referred to as bridge waste.
- Bypass Waste: MSW being sent to an alternative site on an interim, short-term basis after the facility has been in operation is referred to as bypass waste.
- PERC: Penobscot Energy Recovery Company in Orrington, Maine.