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Property, Plant and Equipment | 12 Months Ended
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Dec. 31, 2022
Property, Plant and Equipment [Abstract] |
Property, Plant and Equipment | Property, Plant and Equipment Major classes of property, plant and equipment as of December 31, 2022 and 2021 include:
(in thousands) | 2022 |  | 2021
Electric Plant in Service |  |  |
Production | $ | 1,343,097 |  |  | $ | 1,332,067 |
Transmission | 756,848 |  |  | 722,739 |
Distribution | 612,716 |  |  | 574,488 |
General | 131,718 |  |  | 129,151 |
Electric Plant in Service | 2,844,379 |  |  | 2,758,445 |
Construction Work in Progress | 113,932 |  |  | 74,926 |
Total Gross Electric Plant | 2,958,311 |  |  | 2,833,371 |
Less Accumulated Depreciation and Amortization | 859,988 |  |  | 817,302 |
Net Electric Plant | 2,098,323 |  |  | 2,016,069 |
Nonelectric Property, Plant and Equipment |  |  |
Equipment | 218,770 |  |  | 203,390 |
Buildings and Leasehold Improvements | 61,506 |  |  | 56,908 |
Land | 13,652 |  |  | 13,652 |
Nonelectric Property, Plant and Equipment | 293,928 |  |  | 273,950 |
Construction Work in Progress | 15,170 |  |  | 16,611 |
Total Gross Nonelectric Property, Plant and Equipment | 309,098 |  |  | 290,561 |
Less Accumulated Depreciation and Amortization | 194,704 |  |  | 182,025 |
Net Nonelectric Property, Plant and Equipment | 114,394 |  |  | 108,536 |
Net Property, Plant and Equipment | $ | 2,212,717 |  |  | $ | 2,124,605 |
Depreciation expense for the years ended December 31, 2022, 2021 and 2020 totaled $84.4 million, $85.8 million and $78.6 million. The following table provides OTP’s ownership percentages and amounts included in the December 31, 2022 and 2021 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, 2022 |  |  |  |  |  |  |  |  |
Big Stone Plant | 53.9 | % |  | $ | 338,411 |  |  | $ | 557 |  |  | $ | (118,044) |  |  | $ | 220,924 |
Coyote Station | 35.0 | % |  | 183,461 |  |  | 2,315 |  |  | (111,666) |  |  | 74,110 |
Big Stone South–Ellendale 345 kV line | 50.0 | % |  | 106,185 |  |  | — |  |  | (5,587) |  |  | 100,598 |
Fargo–Monticello 345 kV line | 14.2 | % |  | 78,184 |  |  | — |  |  | (10,095) |  |  | 68,089 |
Big Stone South–Brookings 345 kV line | 50.0 | % |  | 53,041 |  |  | — |  |  | (4,406) |  |  | 48,635 |
Brookings–Southeast Twin Cities 345 kV line | 4.8 | % |  | 26,291 |  |  | — |  |  | (3,211) |  |  | 23,080 |
Bemidji–Grand Rapids 230 kV line | 14.8 | % |  | 16,331 |  |  | — |  |  | (3,318) |  |  | 13,013 |
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 |

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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 https://asc.fasb.org/extlink&oid=126982197&loc=d3e99893-112916 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -URI https://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 https://asc.fasb.org/extlink&oid=126982197&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 https://asc.fasb.org/extlink&oid=126982197&loc=d3e99779-112916 + Details
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