SEMASS Resource Recovery — Plant Summary
- EIA Plant ID
- 50290
- Capacity
- 98.5 MW
- Primary Fuel
- MSW
- Technology
- Municipal Solid Waste
- Status
- Operating
- Location
- Plymouth, MA
- Operating Since
- 1988
- Generators
- 2
- Operator
- SEMASS Partnership
- Parent Company
- EQT
- Annual Generation
- 567,119 MWh
- Capacity Factor
- 65.8%
- Balancing Authority
- ISO New England Inc.
- ISO/RTO
- ISONE
- NERC Region
- NPCC
SEMASS Resource Recovery
OperatingMuni. Waste
Ranked #1 of 5 Muni. Waste plants in MA#3 of 56 nationally
98.5 MW Muni. Waste operating in Plymouth, MA — ISO New England Inc.
EIAGEMWD
98.5 MW
Nameplate Capacity
2
Generators
units
Municipal Solid Waste
Technology
1988
Operating Since
Location
Coordinates
41.8022, -70.7875
County
Plymouth, MA
Nearby Plants
- Old Middleboro Road SolarBESS9.5 MW · 3.4 km
- 71 Charlotte Furnace Rd Hybrid(CSG)BESS2 MW · 3.7 km
- Syncarpha FreetownSolar3.9 MW · 3.7 km
Ownership & Operator
Owner data does not fully agree across sources.
EIA typically reports the operating utility, while GEM resolves to the financial owner or parent corporation. Both can be correct.
| Field | EIA | GEM | Wikidata |
|---|---|---|---|
| Operator | SEMASS Partnership | Covanta SEMASS | — |
| Owner(s) | SEMASS Partnership | EQT | — |
| Status | Operating | operating | — |
Ownership Chain
About
The Southeastern Massachusetts Resource Recovery Facility is a waste-to-energy and recycling facility located in Rochester, Massachusetts. It is currently owned by Reworld.
Read more on WikipediaSEMASS Resource Recovery is a 98.5 MW waste-to-energy plant located in Plymouth County, Massachusetts. The facility, which began operating in 1988, is owned by EQT, a company based in Sweden, and operated by SEMASS Partnership. It utilizes municipal solid waste (MSW) as its primary fuel source across its two generators. The plant is connected to the ISO New England Inc. balancing authority and falls within the North American Electric Reliability Corporation (NERC) NPCC region.
SEMASS Resource Recovery is a significant player in Massachusetts' energy landscape, ranking as the largest of five waste-to-energy plants in the state and third-largest nationally among 56 similar facilities. In the most recent year with available data, the plant generated 567,119 MWh of electricity, achieving a capacity factor of 65.8%.
Generated from EIA, GEM, and public data sources
Engineering & Generators
Grid Context
NERC Region
NPCC
Balancing Authority
ISO New England Inc.
Grid Voltage
115 kV
Regulatory Status
NR
Entity Type
Commercial
Sector
Commercial Non-CHP
Generation
49.8K MWh
Latest Month
567.1K MWh
Annual Generation
65.8%
Capacity Factor
Jan 2023 – Dec 2025
Financial Data
No financial data available for this plant.
Pricing & Market Data
HIGH confidencePoint of Interconnection
Nearest Substation
SEMASS Substation · 115 kV
Substation Distance
< 10 km
Operator
Eversource
Coord Source
OSM spatial
Market Position
ISO/RTO Market
ISO-NE
LMP Node
SEMASS
Pricing Hub
.H.INTERNAL_HUB
Node Source
EIA-860 direct report
News & Articles (10)Beta
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