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Property, Plant and Equipment | 12 Months Ended
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Dec. 31, 2021
Property, Plant and Equipment [Abstract] |
Property, Plant and Equipment | Property, Plant and Equipment Major classes of property, plant and equipment as of December 31, 2021 and 2020 include:
(in thousands) | 2021 |  | 2020
Electric Plant in Service |  |  |
Production | $ | 1,332,067 |  |  | $ | 1,172,362 |
Transmission | 722,739 |  |  | 690,647 |
Distribution | 574,488 |  |  | 545,221 |
General | 129,151 |  |  | 123,122 |
Electric Plant in Service | 2,758,445 |  |  | 2,531,352 |
Construction Work in Progress | 74,926 |  |  | 203,078 |
Total Gross Electric Plant | 2,833,371 |  |  | 2,734,430 |
Less Accumulated Depreciation and Amortization | 817,302 |  |  | 778,988 |
Net Electric Plant | $ | 2,016,069 |  |  | $ | 1,955,442 |
Nonelectric Property, Plant and Equipment |  |  |
Equipment | $ | 203,390 |  |  | $ | 197,389 |
Buildings and Leasehold Improvements | 56,908 |  |  | 55,441 |
Land | 13,652 |  |  | 5,900 |
Nonelectric Property, Plant and Equipment | 273,950 |  |  | 258,730 |
Construction Work in Progress | 16,611 |  |  | 9,290 |
Total Gross Nonelectric Property, Plant and Equipment | 290,561 |  |  | 268,020 |
Less Accumulated Depreciation and Amortization | 182,025 |  |  | 174,189 |
Net Nonelectric Property, Plant and Equipment | 108,536 |  |  | 93,831 |
Net Property, Plant and Equipment | $ | 2,124,605 |  |  | $ | 2,049,273 |
Depreciation expense for the years ended December 31, 2021, 2020 and 2019 totaled $85.8 million, $78.6 million and $71.9 million. The following table provides OTP’s ownership percentages and amounts included in the December 31, 2021 and 2020 consolidated balance sheets for OTP’s share of each of these jointly owned facilities:
(dollars in thousands) | Ownership Percentage |  | Electric Plant in Service |  | Construction Work in Progress |  | Accumulated Depreciation |  | Net Plant
December 31, 2021 |  |  |  |  |  |  |  |  |
Big Stone Plant | 53.9 | % |  | $ | 338,699 |  |  | $ | 260 |  |  | $ | (110,604) |  |  | $ | 228,355 |
Coyote Station | 35.0 | % |  | 182,610 |  |  | 1,110 |  |  | (107,894) |  |  | 75,826 |
Big Stone South–Ellendale 345 kV line | 50.0 | % |  | 106,194 |  |  | — |  |  | (4,052) |  |  | 102,142 |
Fargo–Monticello 345 kV line | 14.2 | % |  | 78,184 |  |  | — |  |  | (9,069) |  |  | 69,115 |
Big Stone South–Brookings 345 kV line | 50.0 | % |  | 52,975 |  |  | — |  |  | (3,613) |  |  | 49,362 |
Brookings–Southeast Twin Cities 345 kV line | 4.8 | % |  | 26,291 |  |  | — |  |  | (2,843) |  |  | 23,448 |
Bemidji–Grand Rapids 230 kV line | 14.8 | % |  | 16,331 |  |  | — |  |  | (2,995) |  |  | 13,336 |
December 31, 2020 |  |  |  |  |  |  |  |  |
Big Stone Plant | 53.9 | % |  | $ | 332,611 |  |  | $ | 2,552 |  |  | $ | (103,504) |  |  | $ | 231,659 |
Coyote Station | 35.0 | % |  | 180,991 |  |  | 732 |  |  | (108,603) |  |  | 73,120 |
Big Stone South–Ellendale 345 kV line | 50.0 | % |  | 106,353 |  |  | — |  |  | (2,433) |  |  | 103,920 |
Fargo–Monticello 345 kV line | 14.2 | % |  | 78,184 |  |  | — |  |  | (8,029) |  |  | 70,155 |
Big Stone South–Brookings 345 kV line | 50.0 | % |  | 53,036 |  |  | — |  |  | (2,822) |  |  | 50,214 |
Brookings–Southeast Twin Cities 345 kV line | 4.8 | % |  | 26,291 |  |  | — |  |  | (2,468) |  |  | 23,823 |
Bemidji–Grand Rapids 230 kV line | 14.8 | % |  | 16,331 |  |  | — |  |  | (2,670) |  |  | 13,661 |

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- Definition The entire disclosure for long-lived, physical asset used in normal conduct of business and not intended for resale. Includes, but is not limited to, work of art, historical treasure, and similar asset classified as collections. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 958 -SubTopic 360 -Section 50 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=120429125&loc=d3e99893-112916 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -URI http://asc.fasb.org/topic&trid=2155823 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 958 -SubTopic 360 -Section 50 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=120429125&loc=SL120174063-112916 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 958 -SubTopic 360 -Section 50 -Paragraph 1 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=120429125&loc=d3e99779-112916 + Details
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