Calvert Cliffs Nuclear Power Plant
Nuclear power plant in Calvert County, Maryland. 1,850.4 MW of nameplate capacity across 2 generators, operated by Constellation Nuclear.
Also known as EIA plant 6011
Analyst: free account, 1 question a day.
Key facts
- Capacity
- 1,850.4 MWNameplate
- Generators
- 2 operatingEIA-860M, August 2026
- Operating since
- May 1975First generator online
- Operator
- Constellation NuclearEIA operator ID 55951
- Grid
- PJMBalancing authority PJM
- Price nodes
- 2 PJM nodesResource nodes with prices
- Location
- Calvert County, MD38.4344, −76.4417
- EIA plant ID
- 6011EIA plant page
Data as of EIA-860M August 2026 (published 2026-09-24). Capacity is nameplate, not live output.
How much power Calvert Cliffs Nuclear produces
Free · EIA-923Net generation, 2025
14.8 TWh
14,795,150 MWh, final
Capacity factor, 2025
91.3%
2024: 90.6%
January to July 2026
8.47 TWh
Provisional
Range, 2015 to 2025
14.6–15.1
TWh a year. Low 2015, high 2017
| Year | Net generation, MWh | Capacity factor | Months reported |
|---|---|---|---|
| 2000 | 13,827,243 | Not reported | 12 of 12 |
| 2001 | 13,656,267 | Not reported | 12 of 12 |
| 2002 | 12,128,005 | Not reported | 12 of 12 |
| 2003 | 13,690,713 | Not reported | 12 of 12 |
| 2004 | 14,580,260 | Not reported | 12 of 12 |
| 2005 | 14,703,221 | Not reported | 12 of 12 |
| 2006 | 13,830,411 | Not reported | 12 of 12 |
| 2007 | 14,353,192 | Not reported | 12 of 12 |
| 2008 | 14,678,695 | Not reported | 12 of 12 |
| 2009 | 14,550,119 | Not reported | 12 of 12 |
| 2010 | 13,993,948 | 87.4% | 12 of 12 |
| 2011 | 14,397,437 | 89.9% | 12 of 12 |
| 2012 | 13,579,266 | 84.5% | 12 of 12 |
| 2013 | 14,264,305 | 89.0% | 12 of 12 |
| 2014 | 14,343,334 | Not reported | 12 of 12 |
| 2015 | 14,643,325 | 91.4% | 12 of 12 |
| 2016 | 14,760,177 | 91.9% | 12 of 12 |
| 2017 | 15,106,988 | 94.3% | 12 of 12 |
| 2018 | 14,987,931 | 93.6% | 12 of 12 |
| 2019 | 15,012,922 | Not reported | 12 of 12 |
| 2020 | 15,080,557 | 92.8% | 12 of 12 |
| 2021 | 14,993,633 | 92.5% | 12 of 12 |
| 2022 | 14,810,684 | 91.4% | 12 of 12 |
| 2023 | 14,983,751 | 92.4% | 12 of 12 |
| 2024 | 14,724,068 | 90.6% | 12 of 12 |
| 2025 | 14,795,150 | 91.3% | 12 of 12 |
| 2026 (provisional, partial year) | 8,471,918 | 90.0% | 7 of 7 |
* 2026 covers January to July and is provisional. Capacity factor is net generation divided by nameplate capacity times the hours of each reported month.
Power prices and basis
Free account · PJMEmissions
Free · EPA CAMPDNo EPA emissions units are linked to this plant.
Water use
Free · EIA-923 cooling, USGSWithdrawal, 2024
1,230,263
million gallons
Consumption, 2024
0
million gallons
Source
Chesapeake Bay
Surface, Brackish. Once-through
Watershed stress
Very low/none · 0.135
USGS SUI, HUC12 Parkers Creek-Frontal Chesapeake Bay
12 of 12 cooling months report withdrawal. Saline, brackish or ocean intake; not tested. Blank volumes are unreported, not zero.
Generators
Free · EIA-860M| Generator | Technology | Nameplate MW | Online since |
|---|---|---|---|
| 1 | Nuclear | 918.0 | May 1975 |
| 2 | Nuclear | 932.4 | April 1977 |
Ownership and offtake
ProOwnership and offtake are part of Pro
Owners and their shares, parent companies, and power purchase agreements with their buyers. EIA-860M lists Constellation Nuclear as the operator, which is not always the owner.
Modeled data
ProPro adds modeled values for this plant. Everything above stays free.
Generation potential vs reported
Monthly potential at seasonal net capability, next to EIA-923 output. Shows how much of the plant's capability was used.
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Questions about Calvert Cliffs Nuclear
How much power does Calvert Cliffs Nuclear Power Plant produce?
Calvert Cliffs Nuclear Power Plant reported 14,795,150 MWh (14.8 TWh) of net generation in 2025, a 91.3% capacity factor on 1,850.4 MW of nameplate capacity. From January to July 2026 it reported 8.47 TWh, which is provisional.
Where is Calvert Cliffs Nuclear Power Plant?
Calvert Cliffs Nuclear Power Plant is in Calvert County, Maryland, at 38.4344, −76.4417. It is in the PJM Interconnection, LLC balancing area (PJM).
Who operates Calvert Cliffs Nuclear Power Plant?
EIA-860M for August 2026 lists Constellation Nuclear as the operator (EIA operator ID 55951). The operator is not always the owner.
When did Calvert Cliffs Nuclear Power Plant start operating?
Its first generator began operating in May 1975, according to EIA-860M.
Does InfraMap have power prices for Calvert Cliffs Nuclear Power Plant?
Yes. InfraMap has PJM day-ahead and real-time prices at 2 price nodes linked to Calvert Cliffs Nuclear Power Plant, with the hub price and node-to-hub basis. Prices are free with an InfraMap account; pricing node names are part of InfraMap Pro.
Sources
- EIA-860 2025 (final) and EIA-860M August 2026: plant, generators, capacity, operator and location
- EIA-923 monthly net generation, 2000 to July 2026 (2026 provisional)
- PJM day-ahead and real-time prices; node and hub assignments as of 2026-10-05
- EIA-923 cooling water 2024 and the USGS surface water supply and use index, Water years 2010-2020 (Oct 2009 to Sep 2020), mean of monthly values
Page updated 2026-10-04 from the InfraMap data build. Methodology · Data sources · EIA plant page