NOTE 3 – PROPERTY, PLANT AND EQUIPMENT

Our property, plant and equipment consists of electric plant and other plant. Both of these are discussed below and are included on our consolidated statements of financial position.

ELECTRIC PLANT: At December 31, 2019, our investment in electric plant and the related annual rates of depreciation or amortization calculated using the straight‑line method are as follows (dollars in thousands):


						Plant In			Accumulated		Net Book
	Annual Depreciation Rate					Service			Depreciation		Value
Generation plant	0.89	%	to	6.27	%	$	3,681,886	$	(1,599,528)	$	2,082,358
Transmission plant	1.11	%	to	2.09	%		1,679,534		(600,740)		1,078,794
General plant	1.46	%	to	9.53	%		472,592		(321,304)		151,288
Other	2.75	%	to	10.00	%		256,380		(119,898)		136,482
Electric plant in service (at cost)						$	6,090,392	$	(2,641,470)		3,448,922
Construction work in progress											164,924
Electric plant										$	3,613,846

At December 31, 2018, our investment in electric plant and the related annual rates of depreciation or amortization calculated using the straight‑line method are as follows (dollars in thousands):


						Plant In			Accumulated		Net Book
	Annual Depreciation Rate					Service			Depreciation		Value
Generation plant	0.89	%	to	6.27	%	$	3,601,911	$	(1,504,802)	$	2,097,109
Transmission plant	1.11	%	to	2.09	%		1,556,860		(562,216)		994,644
General plant	1.46	%	to	9.53	%		492,991		(316,233)		176,758
Other	2.75	%	to	10.00	%		247,366		(116,125)		131,241
Electric plant in service (at cost)						$	5,899,128	$	(2,499,376)		3,399,752
Construction work in progress											207,732
Electric plant										$	3,607,484

At December 31, 2019, we had $63.3 million of commitments to complete construction projects, of which approximately $43.7, $18.6 and $1.0 million are expected to be incurred in 2020, 2021 and 2022, respectively.

JOINTLY OWNED FACILITIES: Our share in each jointly owned facility is as follows as of December 31, 2019 (these electric plant in service, accumulated depreciation and construction work in progress amounts are included in the electric plant table above) (dollars in thousands):


			Electric				Construction
	Tri-State		Plant in		Accumulated		Work In
	Share		Service		Depreciation		Progress
Yampa Project - Craig Generating Station Units 1 and 2	24.00	%	$	396,292	$	245,723	$	21
MBPP - Laramie River Station	27.13	%		490,156		298,465		1,491
Total			$	886,448	$	544,188	$	1,512

OTHER PLANT: Other plant consists of mine assets (discussed below) and non‑utility assets (which consist of piping and equipment specifically related to providing steam and water from the Escalante Generating Station to a third party for their use in the production of paper).

We own 100 percent of Elk Ridge Mining and Reclamation, LLC (“Elk Ridge”), organized for the purpose of acquiring coal reserves and supplying coal to us, which is the owner and operator of the New Horizon Mine near Nucla, Colorado. New Horizon Mine is in mine reclamation and no longer produces coal. Elk Ridge also owns Colowyo Coal, which is the owner and operator of the Colowyo Mine, a large surface coal mine near Craig, Colorado. We also own a 50 percent undivided ownership in the land and the rights to mine the property known as Fort Union Mine. The expenses related to this coal used by us are included in fuel expense on our consolidated statements of operations.

Other plant assets are as follows (dollars in thousands):


	December 31,		December 31,
	2019		2018
Colowyo Mine assets	$	356,612	$	326,838
New Horizon Mine assets		38,949		44,589
Fort Union Mine assets		846		846
Accumulated depreciation and depletion		(106,337)		(104,031)
Net mine assets		290,070		268,242

Non-utility assets		12,644		12,377
Accumulated depreciation		(7,270)		(6,908)
Net non-utility assets		5,374		5,469
Net other plant	$	295,444	$	273,711