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551.3 MW Natural Gas operating in Attala, MS — Midcontinent Independent Transmission System Operator, Inc..
551.3 MW
Nameplate Capacity
3
Generators
units
Natural Gas Fired Combined Cycle
Technology
2001
Operating Since
Coordinates
33.0147, -89.6753
County
Attala, MS
| Field | EIA | GEM | Wikidata |
|---|---|---|---|
| Operator | Entergy Mississippi LLC | Entergy Mississippi | — |
| Owner(s) | Entergy Mississippi LLC | Entergy | — |
| Status | Operating | — | — |
Attala is a 551.3 MW natural gas-fired combined cycle power plant located in Attala County, Mississippi. The plant began operating in 2001 and is owned by Entergy and operated by Entergy Mississippi LLC. It consists of 3 generators. Attala operates within the Midcontinent Independent Transmission System Operator (MISO) balancing authority and the SERC NERC region.
In the most recent year of data, Attala generated 2,221,476 MWh of electricity, achieving a capacity factor of 50.2%. The plant's installed cost was $200.43 per kW, according to FERC data. Attala is ranked as the 14th largest power plant out of 20 in Mississippi, and 450th out of 945 nationally.
Generated from EIA, GEM, and public data sources
ISO/RTO
MISO
Market
ISO/RTO Member
NERC Region
SERC — SERC Reliability Corporation
Balancing Authority
83.2K MWh
Latest Month
2.2M MWh
Annual Generation
50.2%
Capacity Factor
CO₂ Intensity
836 lb/MWh
NOx
0.077 lb/MWh
SO₂
Gas turbine · entergy mississippi, llc · Data from 2015–2024
$289/kW
Installed Cost
$33/kW
Annual CapEx
$18.1/MWh
Operating Cost
Annual Capital & Operating Expenses
Cumulative Installed Cost
Per-Unit Cost Trends
Point of Interconnection
Nearest Substation
McAdams Substation · 500 kV
Substation Distance
< 10 km
Operator
Entergy Mississippi
Coord Source
OSM spatial
Market Position
ISO/RTO Market
MISO
LMP Node
EES.ATTALA1
Pricing Hub
MS.HUB
Node Source
EIA-860 direct report
Last updated 2026-04-09
View all articlesNo ask pi reports yet for this entity.
ask pi about AttalaMidcontinent Independent Transmission System Operator, Inc.. (MISO)
Grid Voltage
500.0 kV
Regulatory Status
RE — Regulated
Entity Type
Investor-Owned Utility
Sector
Electric Utility
0.004 lb/MWh
CH₄
0.014 lb/MWh
N₂O
0.001 lb/MWh
Capacity Factor
61.0%
Annual Net Gen
2944 GWh
CO₂eq
837 lb/MWh
Subregion
SERC Mississippi Valley