Whillock — Plant Summary
- EIA Plant ID
- 7135
- Capacity
- 32.4 MW
- Primary Fuel
- Hydro
- Technology
- Conventional Hydroelectric
- Status
- Operating
- Location
- Conway, AR
- Operating Since
- 1993
- Generators
- 3
- Operator
- Arkansas Electric Coop Corp
- Parent Company
- —
- Annual Generation
- 139,251 MWh
- Capacity Factor
- 49.1%
- Balancing Authority
- Midcontinent Independent Transmission System Operator, Inc..
- ISO/RTO
- MISO
- NERC Region
- SERC
Whillock
OperatingHydro
Ranked #13 of 19 Hydro plants in AR#391 of 1454 nationally
32.4 MW Hydro operating in Conway, AR — Midcontinent Independent Transmission System Operator, Inc..
EIAWD
32.4 MW
Nameplate Capacity
3
Generators
units
Conventional Hydroelectric
Technology
1993
Operating Since
Location
Coordinates
35.1276, -92.7902
County
Conway, AR
Ownership & Operator
| Field | EIA | GEM | Wikidata |
|---|---|---|---|
| Operator | Arkansas Electric Coop Corp | — | — |
| Owner(s) | Arkansas Electric Coop Corp | — | — |
| Status | Operating | — | — |
Ownership Chain
No GEM tracker match for this plant — ownership chain unavailable.
About
The Whillock hydroelectric plant is located in Conway County, Arkansas. It has a total capacity of 32.4 MW across three generators and began operating in 1993. The plant is owned and operated by Arkansas Electric Cooperative Corporation. Whillock utilizes water as its primary fuel source and employs conventional hydroelectric technology.
In the most recent year with available data, the plant generated 139,251 MWh of electricity, achieving a capacity factor of 49.1%. Whillock operates within the Midcontinent Independent Transmission System Operator (MISO) balancing authority and the SERC NERC region. It is ranked as the 13th largest power plant out of 19 in Arkansas, and 396th out of 1464 nationally.
Generated from EIA, GEM, and public data sources
Engineering & Generators
Grid Context
NERC Region
SERC
Balancing Authority
Midcontinent Independent Transmission System Operator, Inc..
Grid Voltage
161 kV
Regulatory Status
RE
Entity Type
Cooperative
Sector
Electric Utility
Generation
10.8K MWh
Latest Month
139.3K MWh
Annual Generation
49.1%
Capacity Factor
Jan 2022 – Dec 2024
Financial Data
No financial data available for this plant.
Pricing & Market Data
HIGH confidenceMarket Position
ISO/RTO Market
MISO
LMP Node
EAI.AECCHYDRO9
Pricing Hub
ARKANSAS.HUB
Location Type
Generation Node
Node Source
EIA-860 direct report
News & Articles (5)Beta
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Industry·corporate
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General
Nancy Whillock Obituary (2008) - Maumelle, AR - Griffin Leggett - Conway Funeral Home
Nancy Lou Whillock, 69 of Maumelle, died Wednesday, March 26, 2008 in Little Rock. Nancy was born November 10, 1938 in Steubenville,...
Legacy | Obituary·18 years ago
Last updated 2026-03-26
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