Item 2. Properties
ITEM 2. PROPERTIES
The following provides a summary of our properties which are material to our operations, by segment, as of December 31, 2025.
ELECTRIC SEGMENT
The following reflects our wholly or jointly owned material electric generation facilities as of December 31, 2025:
Description Location Year
Placed in Service Fuel Type Capacity - kW
(Nameplate Rating)
Big Stone Plant (1)
Big Stone City, SD 1975 Subbituminous Coal 256,025
Coyote Station (2)
Beulah, ND 1981 Lignite Coal 149,450
Jamestown Combustion Turbines Jamestown, ND 1975 Fuel Oil 48,108
Lake Preston Combustion Turbine Lake Preston, SD 1978 Fuel Oil 24,100
Solway Combustion Turbine Solway, MN 2003 Natural Gas/Fuel Oil 44,500
Astoria Station Astoria, SD 2021 Natural Gas 245,000
Langdon Wind Energy Center Cavalier County, ND 2007 Wind 40,500
Ashtabula Wind Energy Center Barnes County, ND 2008 Wind 48,000
Luverne Wind Energy Center Griggs and Steele Counties, ND 2009 Wind 49,500
Merricourt Wind Energy Center McIntosh and Dickey Counties, ND
2020 Wind 150,000
Ashtabula III Wind Energy Center (3)
Barnes County, ND 2023 Wind 62,400
Hoot Lake Solar Otter Tail County, MN 2023 Solar 49,900
(1) OTP holds a 53.9% joint ownership interest in this jointly owned facility. The nameplate capacity indicated reflects OTP's ownership percentage.
(2) OTP holds a 35.0% joint ownership interest in this jointly owned facility. The nameplate capacity indicated reflects OTP's ownership percentage.
(3) Originally placed in service in 2010 and owned by an unrelated third party. OTP acquired this facility in 2023.
In addition to our generation facilities, we wholly or jointly own transmission and distribution lines as of December 31, 2025 as follows:
Miles
Transmission
345 kV (1)
891
230 kV (2)
494
115 kV 975
Less than 115 kV 3,990
Distribution
Less than 115 kV 8,024
(1) As of December 31, 2025, OTP held a 14.2% ownership interest of 242 miles, a 4.8% ownership interest of 250 miles, and a 50.0% ownership interest of 234 miles of the 345 kV transmission lines, with the remaining miles being wholly owned.
(2) As of December 31, 2025, OTP held a 14.8% ownership interest of 70 miles of the 230 kV transmission lines, with the remaining miles being wholly owned.
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MANUFACTURING AND PLASTICS SEGMENTS
The following reflects the properties of our Manufacturing and Plastic segments as of December 31, 2025 which are significant to our operations:
Segment/Location Owned/Leased Facility Type/Use Approximate
Square Feet
Manufacturing Segment
St. Cloud, MN
Leased Warehouse
60,000
Otsego, MN Leased Manufacturing/Warehouse 86,000
Clearwater, MN Owned Office/Manufacturing/Warehouse 204,000
Washington, IL Leased Office/Manufacturing/Warehouse 218,000
Dawsonville, GA Owned Office/Manufacturing/Warehouse 335,000
Detroit Lakes, MN Owned Office/Manufacturing/Warehouse 360,000
Lakeville, MN Leased Office/Manufacturing/Warehouse 443,000
Plastics Segment
Fargo, ND Owned Office/Manufacturing/Warehouse 122,000
Phoenix, AZ Owned Office/Manufacturing/Warehouse 144,000
We believe the facilities described above are adequate for our present business.