Item 2. PROPERTIES

Virtually all of the utility plant property of the operating companies is subject to the lien of their respective first mortgage bond indentures.


NSP-Minnesota Station, Location and Unit at Dec. 31, 2023	Fuel	Installed	MW (a)
Steam:
A.S. King-Bayport, MN, 1 Unit	Coal	1968	511
Sherco-Becker, MN
Unit 1	Coal	1976	680
Unit 2	Coal	1977	682	(b)
Unit 3	Coal	1987	517	(c)
Monticello, MN, 1 Unit	Nuclear	1971	617
PI-Welch, MN
Unit 1	Nuclear	1973	521
Unit 2	Nuclear	1974	519
Various locations, 4 Units	Wood/RDF	Various	36	(d)
Combustion Turbine:
Angus Anson-Sioux Falls, SD, 3 Units	Natural Gas	1994 - 2005	343
Black Dog-Burnsville, MN, 3 Units	Natural Gas	1987 - 2018	491
Blue Lake-Shakopee, MN, 6 Units	Natural Gas/Oil	1974 - 2005	454
High Bridge-St. Paul, MN, 3 Units	Natural Gas	2008	530
Inver Hills-Inver Grove Heights, MN, 8 Units	Natural Gas/ Oil	1972 - 1996	276
Riverside-Minneapolis, MN, 3 Units	Natural Gas	2009	454
Hydro:
Hennepin Island-Minneapolis, MN 5 Units	Hydro	1954-1955	6
Wind:
Blazing Star 1-Lincoln County, MN, 100 Units	Wind	2020	200	(e)
Blazing Star 2-Lincoln County, MN, 100 Units	Wind	2021	200	(e)
Border-Rolette County, ND, 75 Units	Wind	2015	148	(e)
Community Wind North-Lincoln County, MN, 12 Units	Wind	2020	26	(e)
Courtenay Wind-Stutsman County, ND, 100 Units	Wind	2016	190	(e)
Crowned Ridge 2-Grant County, SD, 88 Units	Wind	2020	192	(e)
Dakota Range, SD, 72 Units	Wind	2022	298	(e)
Foxtail-Dickey County, ND, 75 Units	Wind	2019	150	(e)
Freeborn-Freeborn County, MN, 100 Units	Wind	2021	200	(e)
Grand Meadow-Mower County, MN, 67 Units (f)	Wind	2008	99	(e)
Jeffers-Cottonwood County, MN, 20 Units	Wind	2020	43	(e)
Lake Benton-Pipestone County, MN, 44 Units	Wind	2019	99	(e)
Mower-Mower County, MN, 43 Units	Wind	2021	91	(e)
Nobles-Nobles County, MN, 133 Units	Wind	2010	200	(e)
Northern Wind-Murray County, MN, 37 Units (g)	Wind	2023	92	(e)
Pleasant Valley-Mower County, MN, 100 Units	Wind	2015	196	(e)
Rock Aetna - Murray County, MN, 8 Units	Wind	2022	20	(e)
		Total	9,081

(a)Summer 2023 net dependable capacity. Wind is presented as net maximum capacity.

(b)Retired on Dec. 31, 2023.

(c)Based on NSP-Minnesota’s ownership of 59%.

(d)RDF is made from municipal solid waste.

(e)Net maximum capacity is attainable only when wind conditions are sufficiently available. Typical average capacity factors are 35-50% for wind facilities. For the year ended Dec. 31, 2023, NSP-Minnesota’s wind facilities had a weighted-average capacity factors of 43%.

(f)Repowered in 2023.

(g)Purchased in 2023.


NSP-Wisconsin Station, Location and Unit at Dec. 31, 2023	Fuel	Installed	MW (a)
Steam:
Bay Front-Ashland, WI, 2 Units	Wood/Natural Gas	1948 - 1956	41
French Island-La Crosse, WI, 2 Units	Wood/RDF	1940 - 1948	16	(b)
Combustion Turbine:
French Island-La Crosse, WI, 2 Units	Oil	1974	119
Wheaton-Eau Claire, WI, 5 Units	Natural Gas/Oil	1973	240
Hydro:
Various locations, 62 Units	Hydro	Various	135
		Total	551

(a)Summer 2023 net dependable capacity.

(b)RDF is made from municipal solid waste.


PSCo Station, Location and Unit at Dec. 31, 2023	Fuel	Installed	MW (a)
Steam:
Comanche-Pueblo, CO
Unit 2	Coal	1975	330
Unit 3	Coal	2010	500	(b)
Craig-Craig, CO, 2 Units	Coal	1979 - 1980	82	(c)
Hayden-Hayden, CO, 2 Units	Coal	1965 - 1976	233	(d)
Pawnee-Brush, CO, 1 Unit	Coal	1981	505
Cherokee-Denver, CO, 1 Unit	Natural Gas	1968	310
Combustion Turbine:
Blue Spruce-Aurora, CO, 2 Units	Natural Gas	2003	264
Cherokee-Denver, CO, 3 Units	Natural Gas	2015	576
Fort St. Vrain-Platteville, CO, 6 Units	Natural Gas	1972 - 2009	1,022
Manchief, CO, 2 Units	Natural Gas	2000	250
Rocky Mountain-Keenesburg, CO, 3 Units	Natural Gas	2004	592
Various locations, 8 Units	Natural Gas	Various	247
Hydro:
Cabin Creek-Georgetown, CO
Pumped Storage, 2 Units	Hydro	1967	210
Various locations, 6 Units	Hydro	Various	23
Wind:
Rush Creek, CO, 300 units	Wind	2018	582	(e)
Cheyenne Ridge, CO, 229 units	Wind	2020	477	(e)
		Total	6,203

(a)Summer 2023 net dependable capacity. Wind is presented as net maximum capacity.

(b)Based on PSCo’s ownership of 67%.

(c)Based on PSCo’s ownership of 10%.

(d)Based on PSCo’s ownership of 76% of Unit 1 and 37% of Unit 2.

(e)Net maximum capacity is attainable only when wind conditions are sufficiently available. Typical average capacity factors are 35-50% for wind facilities. For the year ended Dec. 31, 2023, PSCo’s wind facilities had a weighted-average capacity factors of 43%.

Table of Contents


SPS Station, Location and Unit at Dec. 31, 2023	Fuel	Installed	MW (a)
Steam:
Cunningham-Hobbs, NM, 1 Unit	Natural Gas	1957 - 1965	183	(b)
Harrington-Amarillo, TX, 3 Units	Coal	1976 - 1980	1,018
Jones-Lubbock, TX, 2 Units	Natural Gas	1971 - 1974	486
Maddox-Hobbs, NM, 1 Unit	Natural Gas	1967	112
Nichols-Amarillo, TX, 3 Units	Natural Gas	1960 - 1968	457
Plant X-Earth, TX, 1 Unit	Natural Gas	1952 - 1964	190	(b)
Tolk-Muleshoe, TX, 2 Units	Coal	1982 - 1985	1,067
Combustion Turbine:
Cunningham-Hobbs, NM, 2 Units	Natural Gas	1997	207
Jones-Lubbock, TX, 2 Units	Natural Gas	2011 - 2013	334
Maddox-Hobbs, NM, 1 Unit	Natural Gas	1963 - 1976	61
Wind:
Hale-Plainview, TX, 239 Units	Wind	2019	478	(c)
Sagamore-Dora, NM, 240 Units	Wind	2020	507	(c)
		Total	5,100

(a)Summer 2023 net dependable capacity. Wind is presented as net maximum capacity.

(b)Retired unit(s) in 2023.

(c)Net maximum capacity is attainable only when wind conditions are sufficiently available. Typical average capacity factors are 35-50% for wind facilities. For the year ended Dec. 31, 2023 SPS’ wind facilities had a weighted-average capacity factors of 48%.

Electric utility overhead and underground transmission and distribution lines at Dec. 31, 2023:


Conductor Miles	NSP-Minnesota	NSP-Wisconsin	PSCo	SPS
Transmission
500 KV	2,916	—	—	—
345 KV	12,845	3,019	5,421	11,701
230 KV	2,300	—	12,244	9,854
161 KV	626	1,818	—	—
138 KV	—	—	92	—
115 KV	8,071	1,862	4,994	14,896
Less than 115 KV	6,640	5,467	1,782	4,494
Total Transmission	33,398	12,166	24,533	40,945

Distribution
Less than 115 KV	83,854	27,971	80,176	23,965

Total	117,252	40,137	104,709	64,910

Electric utility transmission and distribution substations at Dec. 31, 2023:


						NSP-Minnesota						NSP-Wisconsin						PSCo						SPS
Substations						353						201						233						449

Natural gas utility mains at Dec. 31, 2023:


Miles	NSP-Minnesota	NSP-Wisconsin	PSCo	SPS	WGI
Transmission	78	3	2,024	20	11
Distribution	10,894	2,564	23,494	—	—

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