Sioux

8501 N. State Route 94, West Alton, MO 63386

Plant Summary Information

Sioux is ranked #42 out of 129 coal plants nationwide in terms of total annual net electricity generation.

Sioux is comprised of 2 generators and generated 915.4 GWh during the 3-month period between January 2025 to April 2025.

Plant Name	Sioux
Utility Name	Union Electric Co - (MO)
Location	St. Charles County, MO
Initial Operation Date	May 1967
Last Update	Apr 2025
Annual Generation	3.8 TWh
Annual Consumption	41.5 M MMBtu
Ranked #309 out of 12,299 Power Plants Nationwide
Ranked #42 out of 129 Subbituminous Coal Power Plants Nationwide
Ranked #6 out of 119 Missouri Power Plants
Ranked #3 out of 10 Missouri Subbituminous Coal Power Plants
Fuel Types	Subbituminous Coal : 76.3% Bituminous Coal : 23.6%

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Summary Information
Plant Name	Sioux (2107)
Plant Address	8501 N. State Route 94, West Alton, MO 63386
Utility	Union Electric Co - (MO) (19436)
Latitude, Longitude	38.91548, -90.29025
Generation Dates on File	Jan 2001 to Apr 2025
Initial Operation Date	May 1967
Annual Generation	3.8 TWh
Fuel Types	Subbituminous Coal : 76.3% Bituminous Coal : 23.6%

Federal Energy Regulatory Commission (FERC) Information
FERC Cogeneration Status	No
FERC Small Power Producer Status	No
FERC Exempt Wholesale Generator Status	No

Regulatory Information
Regulatory Status	Regulated
NERC Region	SERC
Balancing Authority	Midcontinent Independent Transmission System Operator, Inc.. (MISO)
NAICS Code	Utilities (22)
Sector	Electric Utility (1)
Water Source	Mississippi River
Ash Impoundment	Yes Lined Operating
Transmission / Distribution Owner	Union Electric Co - (MO) (19436) MO
Grid Voltage	138.00 kV
Energy Storage	No

* Data obtained from the 2024 EIA 860 Report

Technology	Conventional Steam Coal
Prime Mover	Steam Turbine
Ownership	Single Owner
RTO ISO LMP Node Designation	AMMO.SIOUX1
RTO ISO Location Designation For Reporting Wholesale Sales Data	AMMO.SIOUX1
Nameplate Capacity	549.7 MW
Nameplate Power Factor	0.85
Summer Capacity	487 MW
Winter Capacity	497 MW
Minimum Load	253 MW
Uprate/Derate Completed	No
Status	Operating
First Operation Date	May 1967

Planned Retirement	December 2028
Combined Heat & Power	No
Sector Name	Electric Utility (1)
Energy Source	Subbituminous Coal / Bituminous Coal
Startup Source	Distillate Fuel Oil
Solid Fuel Gasification	No
Time From Cold Shutdown To Full Load	OVER
Pulverized Coal Technology	Yes
Supercritical Technology	Yes
Multiple Fuels	Yes
Cofire Fuels	No
Switch Between Oil And Natural Gas	No

Technology	Conventional Steam Coal
Prime Mover	Steam Turbine
Ownership	Single Owner
RTO ISO LMP Node Designation	AMMO.SIOUX2
RTO ISO Location Designation For Reporting Wholesale Sales Data	AMMO.SIOUX2
Nameplate Capacity	549.7 MW
Nameplate Power Factor	0.85
Summer Capacity	487 MW
Winter Capacity	497 MW
Minimum Load	252 MW
Uprate/Derate Completed	No
Status	Operating
First Operation Date	May 1968

Planned Retirement	December 2028
Combined Heat & Power	No
Sector Name	Electric Utility (1)
Energy Source	Subbituminous Coal / Bituminous Coal
Startup Source	Distillate Fuel Oil
Solid Fuel Gasification	No
Time From Cold Shutdown To Full Load	OVER
Pulverized Coal Technology	Yes
Supercritical Technology	Yes
Multiple Fuels	Yes
Cofire Fuels	No
Switch Between Oil And Natural Gas	No

Owner Name	Address	Generator	Ownership
*We couldn't locate any owners for this plant*

Power plants with a similar annual net generation from Subbituminous Coal.

Rank	Plant Name	Plant Location	Annual Generation
#32	Weston	Rothschild, WI	4.4 TWh
#33	Craig (CO)	Craig, CO	4.3 TWh
#34	Dave Johnston	Glen Rock, WY	4.2 TWh
#35	Gallatin (TN)	Gallatin, TN	4.4 TWh
#36	Plum Point Energy Station	Osceola, AR	3.7 TWh
#37	Louisa	Muscatine, IA	3.4 TWh
#38	Sandy Creek Energy Station	Riesel, TX	3.2 TWh
#39	Coleto Creek	Fannin, TX	3.1 TWh
#40	Newton	Newton, IL	3.1 TWh
#41	Transalta Centralia Generation	Centralia, WA	3.1 TWh
#43	Powerton	Pekin, IL	2.9 TWh
#44	John W Turk Jr Power Plant	Fulton, AR	2.8 TWh
#45	Coronado	St Johns, AZ	2.6 TWh
#46	Kincaid Generation LLC	Kincaid, IL	2.6 TWh
#47	Flint Creek	Gentry, AR	2.5 TWh
#48	Dry Fork Station	Gillette, WY	2.5 TWh
#49	Kingston	Kingston, TN	3.5 TWh
#50	Sooner	Red Rock, OK	2.4 TWh
#51	White Bluff	Redfield, AR	2.3 TWh
#52	Edgewater	Sheboygan, WI	2.3 TWh

Below are closest 20 power plants surrounding Sioux.

Plant Name	Plant Location	Annual Generation	Distance
AES Belleville Solar LLC	Belleville, IL	12.9 GWh	33.1 mi
Anheuser-Busch St Louis	St. Louis, MO	42.6 GWh	22.4 mi
Edwardsville Solar II	Edwardsville, IL	4.2 GWh	17.2 mi
Freeburg	Freeburg, IL	122.0 MWh	39.5 mi
Granite City Works	Granite City, IL	453.8 GWh	17.4 mi
Hickory Solar	Jerseyville, IL	86.2 GWh	15.6 mi
Highland	Highland, IL	187.0 MWh	34.7 mi
IKEA St. Louis 410	St. Louis, MO	328.0 MWh	19.5 mi
Labadie	Labadie, MO	15.2 TWh	38.3 mi
Milam Gas Recovery	East St. Lois, IL	19.4 GWh	19.6 mi
O'Fallon Renewable Energy Center	O'Fallon, MO	2.3 GWh	21.7 mi
Renewable Energy Center at BJH	St Louis, MO	846.0 MWh	19.4 mi
SCS American Bottoms 009885 Sauget, LLC	Sauget, IL	3.0 GWh	23.1 mi
Southwestern Bell Telephone	St. Louis, MO	72.0 MWh	20.6 mi
St. Clair Solar 3	Washington Park, IL	158.0 MWh	23 mi
Trenton East	Trenton, IL	1.7 GWh	39.6 mi
Trenton West	Trenton, IL	2.2 GWh	39.2 mi
Trigen St. Louis	St Louis, MO	85.9 GWh	20.2 mi
Venice	Venice, IL	26.8 GWh	18.4 mi
Viking Solar CSG	Palmyra, IL	5.9 GWh	37.4 mi