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Jack Watson — Power plant · Gas, steam turbine · Mississippi Power Co
  • Combustion
  • Operating
  • 10 · 100 · 1,000 MW

Jack Watson

Power plant · Gas, steam turbine

Key facts

Power plant · Gas, steam turbineran 33% of 2025 Operating
Capacity
Capacity: sourceEIA-860M · Open licenseMW
Commissioned
1968
Net generation, 2025
2,633,847 MWh
Grid
230 kV to Mississippi Power Co (SOCO)
Location
Harrison County, Mississippi

Output

Net generation MWh by year, 2001 to 2026
Fuel burned MMBtu by year, 2001 to 2026
  • Gas
  • Coal
  • Oil
  • Biomass and waste

Operations detail

Details

Who’s behind it

Owner
Southern CO

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Technology
Gas, steam turbine source: “Natural Gas Steam Turbine”
Age
58 years since 1968
Unused energy
5,418 GWh 2025Unused energyA lead, not a guarantee: MW × hours × (1 − capacity factor) for the latest year (EIA-923), gas, coal and oil plants only. Air-permit run-hour caps, heat rate (cost to run) and capacity-market or reliability obligations can rule it out.
Heat rate
10,802 Btu/kWh 2025
All 6 attributes from EIA-860M Preliminary Monthly Electric Generator Inventory
AttributeValue
EPA greenhouse gas reporting (GHGRP)
EPA FRS ID
110071161467
Subparts reported
C, D
NAICS code
221112
Subpart PP (CO2 supply)
No
Subpart RR (geologic sequestration)
No
Subpart UU (CO2 injection)
No
Reporting year
2023
GHGRP facility ID
1000698
Fuel burned (MMBtu), 202528,449,708
Capacity factor, 20250.327
Heat rate (Btu/kWh), 202510,801.6
Net generation (MWh), 20252,633,847
Balancing authority codeSOCO

Retirement

EIA-860M September 2026StatusSome generators have retired; the rest of the plant is still in service. As of EIA-860M for September 2026.
Capacity retired
296.4 MW
Generators retired
3
Capacity still in service
919.1 MW
GeneratorTechnologyNameplateStateDate
1Natural Gas Steam Turbine93.8 MWRetiredJuly 2015
2Natural Gas Steam Turbine93.8 MWRetiredJuly 2015
3Natural Gas Steam Turbine108.8 MWRetiredMarch 2018

Grid

EIA-860 2025Grid fieldsAs the plant reported them to EIA-860 for 2025 (Schedule 2).
Grid voltage at the plant
230 kV
Transmission or distribution system owner
Mississippi Power Co
Balancing authority
Southern Company Services, Inc. - Trans
NERC region
SERC
Transmission lines within 25 km (6)
Can the connection be reused?

A plant that retires usually leaves its substation, transmission connection and interconnection agreement behind, and those may be reusable by a new project at the same site. FERC Order No. 845 lets an interconnection customer use surplus interconnection service at an existing site, and some transmission providers' tariffs let a replacement resource take over a retiring unit's interconnection service, usually within a set time after the retirement. Whether any such right still exists here, who holds it and on what terms depends on the owner, the transmission provider and timing; this page does not establish any of that.

Ownership

2 companies2
CompanyRoleShareAs ofSource
Mississippi Power Co Operator EIA-860M
SOUTHERN CO Owner 100.0% 31 Dec 2023 EPA GHGRP

Timeline

  • Stated Unit 3 scheduled to retire, 108.8 MW · EIA-860M
  • Stated Units 1, 2 scheduled to retire, 187.6 MW · EIA-860M
  • In service · EIA-860M

Sources

5 sources

Sources EIA-860M · LBNL · EIA · EIA-860M Preliminary Monthly Electric Generator Inventory · EPA Greenhouse Gas Reporting Program — facility register with parent-company shares (Envirofacts pub_dim_facility; FLIGHT)

Sources

Every source and license · Attribution

View at source