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Tasley — Power plant · Oil · Calpine Mid-Atlantic Generation LLC
  • Combustion
  • Operating
  • 10 · 100 · 1,000 MW

Power plant · Oil

Key facts

Power plant · Oilran 1% of 2025 Standby
Capacity
Capacity: sourceEIA-860M · Open licenseMW
Commissioned
1972
Net generation, 2025
2,644 MWh
Grid
69 kV to Delmarva Power (PJM)
Location
Accomack County, Virginia
Operated by
Calpine Mid-Atlantic Generation LLCSourceEIA-860M Preliminary Monthly Electric Generator Inventory

Operations

Net generation, 2025
2,644MWh
Fuel burned, 2025
41,406MMBtu
Capacity factor, 2025
1.1%
Heat rate, 2025
15,660Btu/kWh
Capacity factor % of full output, by year
Heat rate Btu per kWh, by year
Net generation, fuel burned, capacity factor and heat rate by year, newest first, as EIA's bulk electricity file states them.
YearNet generation (MWh)Fuel burned (MMBtu)Capacity factorHeat rate (Btu/kWh)
20252,64441,4061.1%15,660
20242,06233,7790.9%16,382
20232,33840,3081.0%17,240
20221,74928,5300.7%16,312
20212915,4330.1%18,670
20204768,5450.2%17,952
20196569,9490.3%15,166
201876811,1030.3%14,457
201765412,3380.3%18,865
20161,57524,9950.7%15,870
20152,43237,8601.0%15,567
20142,70935,9891.1%13,285
20133085,6190.1%18,244
20121645,0810.1%—
201142911,5200.2%26,853
201095116,9100.4%17,781
2009-50814,019——
2008-14116,995——
20071,33927,7280.6%20,708
200674420,5100.3%27,567
20051,92940,1760.8%20,827
200462016,5000.3%26,613
2003 (10 of 12 months)4,16073,119—17,577
20026,197108,5372.6%17,514
200130,275534,36012.8%17,650
How these are worked out

Net generation and fuel burned are the monthly figures EIA publishes in its bulk electricity file, from the plant's Form 923 reports; a year is the sum of its months. Capacity factor is a full year's net generation over today's nameplate capacity times the hours in that year (8,784 in a leap year), so a plant uprated or partly retired since reads against its current size; heat rate is fuel burned over net generation, for plants that burn fuel. A year with fewer than twelve months stated has no capacity factor, and a value outside the plausible range is left blank rather than shown. By month, the charts apply the same rules to each month's own hours and fuel.

Sources

2 sources

Sources EIA-860M · EIA

Sources

  • EIA-860MOpen license · retrieved Nov 4, 2026
  • EIAOpen license · retrieved Nov 1, 2026Source: U.S. Energy Information Administration, Electricity bulk data (Form EIA-923 monthly plant series)

Every source and license · Attribution

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