Exelon West Medway II LLC
9 Summer St, Medway, MA 2053Plant Summary Information
Exelon West Medway II LLC is ranked #18 out of 586 power plants in Massachusetts in terms of total annual net electricity generation.
Exelon West Medway II LLC is comprised of 2 generators and generated 28.4 GWh during the 3-month period between December 2024 to March 2025.
| Plant Name | Exelon West Medway II LLC |
|---|---|
| Utility Name | Constellation Power, Inc |
| Location | Norfolk County, MA |
| Initial Operation Date | March 2019 |
| Last Update | Mar 2025 |
| Annual Generation | 221.0 GWh |
| Annual Consumption | 2.3 M MMBtu |
| Ranked #2,230 out of 11,623 Power Plants Nationwide | |
| Ranked #712 out of 2,187 Natural Gas Power Plants Nationwide | |
| Ranked #18 out of 586 Massachusetts Power Plants | |
| Ranked #12 out of 44 Massachusetts Natural Gas Power Plants | |
| Fuel Types | Natural Gas : 98.2% Kerosene : 1.8% |
| Previous Operator |
Exelon Power (2014 to 2021) Constellation Power, Inc (2022 to 2023) |
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Monthly Net Generation for Exelon West Medway II LLC
Exelon West Medway II LLC Details
| Summary Information | |
|---|---|
| Plant Name | Exelon West Medway II LLC (59882) |
| Plant Address | 9 Summer St, Medway, MA 2053 |
| Utility | Constellation Power, Inc (6035) |
| Latitude, Longitude | 42.13722, -71.4447 |
| Generation Dates on File | May 2019 to Mar 2025 |
| Initial Operation Date | March 2019 |
| Annual Generation | 221.0 GWh |
| Fuel Types | Natural Gas : 98.2% Kerosene : 1.8% |
| Federal Energy Regulatory Commission (FERC) Information | |
| FERC Cogeneration Status | No |
| FERC Small Power Producer Status | No |
| FERC Exempt Wholesale Generator Status | Yes |
| FERC Exempt Wholesale Generator Docket Number | 98-42-000 |
| Regulatory Information | |
|---|---|
| Regulatory Status | Non-Regulated |
| NERC Region | NPCC |
| Balancing Authority | ISO New England Inc. (ISNE) |
| NAICS Code | Utilities (22) |
| Sector | IPP Non-CHP (2) |
| Water Source | |
| Ash Impoundment | No |
| Transmission / Distribution Owner | NSTAR Electric Company (54913) MA |
| Grid Voltage | 115.00 kV |
| Energy Storage | No |
| Natural Gas Information | |
| Pipeline Name | Algonquin Gas Transmission Company |
| Natural Gas Storage | No |
Generator 4 Details Operating March 2019
| Technology | Natural Gas Fired Combustion Turbine |
|---|---|
| Prime Mover | Combustion Turbine |
| Ownership | Single Owner |
| RTO ISO LMP Node Designation | UN.MEDWAY 13.8WMJ4 |
| RTO ISO Location Designation For Reporting Wholesale Sales Data | UN.MEDWAY 13.8WMJ4 |
| Nameplate Capacity | 131.8 MW |
| Nameplate Power Factor | 0.85 |
| Summer Capacity | 82.8 MW |
| Winter Capacity | 103.5 MW |
| Minimum Load | 25 MW |
| Uprate/Derate Completed | No |
| Status | Operating |
| First Operation Date | March 2019 |
|---|---|
| Combined Heat & Power | No |
| Sector Name | IPP Non-CHP (2) |
| Energy Source | Natural Gas / Kerosene |
| Solid Fuel Gasification | No |
| Carbon Capture Technology | No |
| Time From Cold Shutdown To Full Load | 10M |
| Other Planned Modifications | No |
| Multiple Fuels | Yes |
| Cofire Fuels | No |
| Switch Between Oil And Natural Gas | Yes |
| Multifuel Details | |
| Switch When Operating | Yes |
|---|---|
| Net Summer Capacity With Natural Gas | 82.8 MW |
| Net Winter Capacity With Natural Gas | 103.5 MW |
| Net Summer Capacity With Oil | 82.5 MW |
| Net Winter Capacity With Oil | 103.5 MW |
| Time To Switch From Gas To Oil | 1H |
| Time To Switch From Oil To Gas | 1H |
| Factors That Limit Switching | No |
Generator 5 Details Operating May 2019
| Technology | Natural Gas Fired Combustion Turbine |
|---|---|
| Prime Mover | Combustion Turbine |
| Ownership | Single Owner |
| RTO ISO LMP Node Designation | UN.MEDWAY 13.8WMJ5 |
| RTO ISO Location Designation For Reporting Wholesale Sales Data | UN.MEDWAY 13.8WMJ5 |
| Nameplate Capacity | 131.8 MW |
| Nameplate Power Factor | 0.85 |
| Summer Capacity | 98 MW |
| Winter Capacity | 103.5 MW |
| Minimum Load | 25 MW |
| Uprate/Derate Completed | No |
| Status | Operating |
| First Operation Date | May 2019 |
|---|---|
| Combined Heat & Power | No |
| Sector Name | IPP Non-CHP (2) |
| Energy Source | Natural Gas / Kerosene |
| Solid Fuel Gasification | No |
| Carbon Capture Technology | No |
| Time From Cold Shutdown To Full Load | 10M |
| Other Planned Modifications | No |
| Multiple Fuels | Yes |
| Cofire Fuels | No |
| Switch Between Oil And Natural Gas | Yes |
| Multifuel Details | |
| Switch When Operating | Yes |
|---|---|
| Net Summer Capacity With Natural Gas | 98 MW |
| Net Winter Capacity With Natural Gas | 103.5 MW |
| Net Summer Capacity With Oil | 98 MW |
| Net Winter Capacity With Oil | 103.5 MW |
| Time To Switch From Gas To Oil | 1H |
| Time To Switch From Oil To Gas | 1H |
| Factors That Limit Switching | No |
Exelon West Medway II LLC Plant Owners
| Owner Name | Address | Generator | Ownership |
|---|---|---|---|
| We couldn't locate any owners for this plant | |||
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Nearby Power Plants
Below are closest 20 power plants surrounding Exelon West Medway II LLC.
| Plant Name | Plant Location | Annual Generation | Distance |
|---|---|---|---|
| 126 Grove Solar LLC | Franklin, MA | 2.1 GWh | 4.4 mi |
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| ANP Blackstone Energy Project | Blackstone, MA | 2.1 TWh | 6.5 mi |
| Bellingham Cogeneration Facility | Bellingham, MA | 102.2 GWh | 3.7 mi |
| Bourne (MA) - Holliston I | Holliston, MA | 3.2 GWh | 2.9 mi |
| BWC Muddy Brook, LLC Hybrid | Mendon, MA | 1.6 GWh | 4.2 mi |
| BWC Wading River One, Two, Three CSG | Mendon, MA | 4.8 GWh | 5.5 mi |
| Centaurus Solar - MA | Ashland, MA | 3.8 GWh | 8.1 mi |
| Exelon Medway LLC | Medway, MA | 3.7 GWh | 0.2 mi |
| Franklin 1 | Wrentham, MA | 4.1 GWh | 7.2 mi |
| Franklin 2 | Franklin, MA | 5.3 GWh | 6.3 mi |
| Holliston LLC | Holliston, MA | 2.0 GWh | 5.4 mi |
| Holliston Solar CSG | Holliston, MA | 1.4 GWh | 2.5 mi |
| Hopkinton CSG | Hopkinton, MA | 2.7 GWh | 6.4 mi |
| Kearsarge Bellingham PV | Bellingham, MA | 4.8 GWh | 4.6 mi |
| Kearsarge Upper Union | Franklin, MA | 1.3 GWh | 6.6 mi |
| Kearsarge William Way | Bellingham, MA | 7.2 GWh | 4.5 mi |
| Mendon | Mendon, MA | 3.9 GWh | 4 mi |
| Milford Power LP | Milford, MA | 210.3 GWh | 3.5 mi |
| Town of Norfolk MA at Medway Branch | Norfolk, MA | 1.9 GWh | 5.4 mi |