Big Stone

48450 144th Street, Big Stone City, SD 57216

Plant Summary Information

Big Stone is ranked #2 out of 50 power plants in South Dakota in terms of total annual net electricity generation.

Big Stone is comprised of 2 generators and generated 436.4 GWh during the 3-month period between June 2024 to September 2024.

Plant Name	Big Stone
Utility Name	Otter Tail Power Co
Location	Grant County, SD
Initial Operation Date	May 1975
Last Update	Sep 2024
Annual Generation	1.6 TWh
Annual Consumption	20.4 M MMBtu
Ranked #578 out of 11,852 Power Plants Nationwide
Ranked #64 out of 132 Subbituminous Coal Power Plants Nationwide
Ranked #2 out of 50 South Dakota Power Plants
Ranked #1 out of 1 South Dakota Subbituminous Coal Power Plants
Fuel Types	Subbituminous Coal : 99.8%

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Summary Information
Plant Name	Big Stone (6098)
Plant Address	48450 144th Street, Big Stone City, SD 57216
Utility	Otter Tail Power Co (14232)
Latitude, Longitude	45.30365, -96.51007
Generation Dates on File	Jan 2001 to Sep 2024
Initial Operation Date	May 1975
Annual Generation	1.6 TWh
Fuel Types	Subbituminous Coal : 99.8%

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	MRO
Balancing Authority	Midcontinent Independent Transmission System Operator, Inc.. (MISO)
NAICS Code	Utilities (22)
Sector	Electric Utility (1)
Water Source	Big Stone Lake
Ash Impoundment	Yes Not Lined Operating
Transmission / Distribution Owner	Otter Tail Power Co (14232) SD
Grid Voltage	230.00 kV
Energy Storage	No

* Data obtained from the 2023 EIA 860 Report

Technology	Conventional Steam Coal
Prime Mover	Steam Turbine
Ownership	Jointly Owned
RTO ISO LMP Node Designation	OTP.BIGSTON1
RTO ISO Location Designation For Reporting Wholesale Sales Data	OTP.BIGSTON1
Nameplate Capacity	450 MW
Nameplate Power Factor	0.9
Summer Capacity	475 MW
Winter Capacity	475 MW
Minimum Load	125 MW
Uprate/Derate Completed	No
Status	Operating
First Operation Date	May 1975
Combined Heat & Power	Yes

Sector Name	Electric Utility (1)
Topping Or Bottoming	T
Energy Source	Subbituminous Coal / Distillate Fuel Oil / Agricultural By-Products
Startup Source	Distillate Fuel Oil
Solid Fuel Gasification	No
Carbon Capture Technology	No
Time From Cold Shutdown To Full Load	12H
Pulverized Coal Technology	Yes
Subcritical Technology	Yes
Other Planned Modifications	No
Multiple Fuels	Yes
Cofire Fuels	Yes
Switch Between Oil And Natural Gas	No

Multifuel Details
Cofire Energy Source	PC / WO / AB / WDS

Synchronized To Transmission Grid	Yes
First Operation Date	May 1975
Combined Heat & Power	No
Sector Name	Electric Utility (1)
Energy Source	Distillate Fuel Oil
Solid Fuel Gasification	No
Carbon Capture Technology	No
Time From Cold Shutdown To Full Load	10M
Other Planned Modifications	No
Multiple Fuels	No

Owner Name	Address	Generator	Ownership
Montana-Dakota Utilities Co	400 North Fourth Street, Bismarck, ND 58501	Generator 1	22.70%
NorthWestern Energy - (SD)	3010 West 69th Street, Sioux Falls, SD 57108	Generator 1	23.40%
Otter Tail Power Co	P O Box 496, 215 South Cascade Street, Fergus Falls, MN 56538	Generator 1	53.90%
Montana-Dakota Utilities Co	400 North Fourth Street, Bismarck, ND 58501	Generator D1	22.70%
NorthWestern Energy - (SD)	3010 West 69th Street, Sioux Falls, SD 57108	Generator D1	23.40%
Otter Tail Power Co	P O Box 496, 215 South Cascade Street, Fergus Falls, MN 56538	Generator D1	53.90%

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

Rank	Plant Name	Plant Location	Annual Generation
#54	Flint Creek	Gentry, AR	2.1 TWh
#55	Powerton	Pekin, IL	2.0 TWh
#56	Edgewater	Sheboygan, WI	2.0 TWh
#57	John Twitty Energy Center	Springfield, MO	2.1 TWh
#58	Wyodak	Gillette, WY	1.9 TWh
#59	Naughton	Kemmerer, WY	3.0 TWh
#60	Brame Energy Center	Lena, LA	3.0 TWh
#61	Cholla	Joseph City, AZ	1.6 TWh
#62	Tolk	Muleshoe, TX	1.9 TWh
#63	Big Cajun 2	New Roads, LA	2.4 TWh
#65	Sikeston Power Station	Sikeston, MO	1.5 TWh
#66	Sooner	Red Rock, OK	1.5 TWh
#67	Ottumwa	Ottumwa, IA	1.5 TWh
#68	Victor J Daniel Jr	Escatawpa, MS	8.2 TWh
#69	R S Nelson	Westlake, LA	1.4 TWh
#70	Northeastern	Oologah, OK	3.9 TWh
#71	Hugo	Fort Towson, OK	1.2 TWh
#72	Rawhide	Wellington, CO	1.3 TWh
#73	TS Power Plant	Battle Mountain, NV	1.4 TWh
#74	Holcomb	Holcomb, KS	1.2 TWh

Below are closest 20 power plants surrounding Big Stone.

Plant Name	Plant Location	Annual Generation	Distance
Astoria Station	Astoria, SD	395.9 GWh	50.4 mi
Benson City of	Benson, MN	69.0 MWh	44.1 mi
Crowned Ridge Wind Energy Center	Watertown, SD	717.7 GWh	18.9 mi
Crowned Ridge Wind II Energy Center	Watertown, SD	804.3 GWh	29 mi
Dakota Range III Wind Project	Summit, SD	480.5 GWh	29 mi
Deuel Harvest Wind Energy LLC	Clear Lake, SD	1.0 TWh	30.4 mi
Grant County Wind LLC	Woodstock, MN	51.3 GWh	45.9 mi
Hormel CSG Solar	Montevideo, MN	1.0 GWh	46.5 mi
Montevideo Solar LLC, CSG	Montevideo, MN	9.8 GWh	48.6 mi
Novel Handeland Solar LLC (CSG)	Clarkfield, MN	2.2 GWh	50.5 mi
State Auto Insurance	Milbank, SD	14.0 MWh	7.7 mi
Stevens Community Medical Center	Morris, MN	8.0 MWh	35.2 mi
Tatanka Ridge	Toronto, SD	599.5 GWh	49.3 mi
Taurus Community Solar	Montevideo, MN	5.4 GWh	46.8 mi
UMM Wind Turbine	Morris, MN	4.5 GWh	36.5 mi
USS Christoffer Solar LLC CSG	Montevideo, MN	2.2 GWh	42.4 mi
Valley Queen Cheese	Milbank, SD	27.0 MWh	8.4 mi
Watertown Power Plant	Watertown, SD	5.2 GWh	40.3 mi
WCROC Wind Farm	Morris, MN	4.6 GWh	36.5 mi
Wollan Garden Solar	Starbuck, MN	1.5 GWh	52.7 mi