MYSTIC GENERATING STATION
Retired 2024Natural Gas power plant
- Capacity
- 2,376 MW
- Primary fuel
- Natural Gas
- County
- Middlesex County
- Operator
- CONSTELLATION MYSTIC POWER LLC
- EIA plant ID
- 1588
- Coordinates
- 42.3911, -71.0649
MYSTIC GENERATING STATION, a retired 2,376 MW Natural Gas power plant in Middlesex County, Massachusetts. It was retired in 2024, according to EIA-860.
How MYSTIC GENERATING STATION compares
It was retired in 2024 according to EIA-860, so it is not counted in Massachusetts's operating fleet. It shares Middlesex County with 8 other operating plants, including KENDALL SQUARE STATION and BOOTT HYDROPOWER.
Grid neighborhood
The closest transmission line found within 10 miles is a 115 kV line, under 0.1 miles away. Another 26 operating power plants totaling 2,026 MW sit within 25 miles; the largest is FORE RIVER GENERATING STATION (872 MW, Natural Gas). Within 50 miles are 5 mapped data centers; the nearest is CoreSite - Boston (BO1) in Somerville, about 1.3 miles away.
Computed by Bywatts from HIFLD power plant and transmission line records, EIA-860 retirement records and PeeringDB data center locations; distances are straight-line. Sources and methodology
Weather peril exposure
MYSTIC GENERATING STATION is a retired 2,376 MW natural gas power plant in Middlesex County, MA, formerly operated by CONSTELLATION MYSTIC POWER LLC. Middlesex County carries low modeled catastrophe exposure in the FEMA National Risk Index, scoring 1.2 of 5 at the 6th national percentile. Ice storm is the leading peril, rated Very High by FEMA at the 76th percentile.
The Bywatts loss layer is calibrated to solar PV hardware, so it is not applied to a natural gas plant. The ratings below are the FEMA National Risk Index county hazard ratings for this location.
Middlesex County hazard ratings
| Peril | FEMA rating | National percentile | Peril score | Events per year |
|---|---|---|---|---|
| Ice storm | Very High | 76th | 4.0 of 5 | 2.7 |
| Hurricane | Relatively High | 76th | 4.0 of 5 | 0.16 |
| Earthquake | Relatively Moderate | 71st | 3.8 of 5 | <0.01 |
| Coastal flooding | Relatively Low | 34th | 2.4 of 5 | 6.2 |
| Wildfire | Relatively Low | 34th | 2.4 of 5 | <0.01 |
| Riverine flooding | Relatively High | 27th | 2.1 of 5 | 4.3 |
| Lightning | Relatively High | 22nd | 1.9 of 5 | 21.6 |
| Tornado | Relatively Moderate | 22nd | 1.9 of 5 | 0.18 |
| Strong wind | Relatively High | 8th | 1.3 of 5 | 0.97 |
| Heat wave | Relatively Moderate | 7th | 1.3 of 5 | 5.7 |
| Winter weather | Relatively Moderate | 6th | 1.2 of 5 | 17.2 |
| Hail | Very Low | 4th | 1.2 of 5 | 2.3 |
Model hail, wind and flood exposure for Middlesex County in the weather risk calculator
Ratings are the FEMA National Risk Index county hazard ratings; the peril score is a Bywatts transform of the FEMA national percentile. Full data sources and the solar vulnerability methodology are in the weather risk calculator.
Modeled estimate for screening and negotiation. Built from FEMA National Risk Index county hazard data and a solar vulnerability layer documented above. Not a quote, a binder, or actuarial advice, and not a substitute for a carrier's own model. Hazard data: FEMA National Risk Index December 2025, synced 2026-07-24. Resolution is county level, not site level.