Item 2. Properties

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Item 2. Properties

Virtually all of the utility plant property of NSP-Minnesota, NSP-Wisconsin, SPS and PSCo is subject to the lien of their first mortgage bond indentures.

Electric Generating Stations:

NSP-Minnesota Station, Location and UnitFuelInstalledMW (a)
Steam:
A.S. King-Bayport, MN, 1 UnitCoal1968511
Sherco-Becker, MN
Unit 1Coal1976680
Unit 2Coal1977682
Unit 3Coal1987517(b)
Monticello, MN, 1 UnitNuclear1971617
PI-Welch, MN
Unit 1Nuclear1973521
Unit 2Nuclear1974519
Various locations, 4 UnitsWood/RefuseVarious36(c)
Combustion Turbine:
Angus Anson-Sioux Falls, SD, 3 UnitsNatural Gas1994 - 2005327
Black Dog-Burnsville, MN, 3 UnitsNatural Gas1987 - 2002494(d)
Blue Lake-Shakopee, MN, 6 UnitsNatural Gas1974 - 2005453
High Bridge-St. Paul, MN, 3 UnitsNatural Gas2008530
Inver Hills-Inver Grove Heights, MN, 6 UnitsNatural Gas1972282
Riverside-Minneapolis, MN, 3 UnitsNatural Gas2009454
Various locations, 14 UnitsNatural GasVarious67
Wind:
Border-Rolette County, ND, 75 UnitsWind2015148(e)
Courtenay Wind, ND, 100 UnitsWind2016195(e)
Grand Meadow-Mower County, MN, 67 UnitsWind2008101(e)
Nobles-Nobles County, MN., 134 UnitsWind2010200(e)
Pleasant Valley-Mower County, MN, 100 UnitsWind2015196(e)
Total7,530
(a)Summer 2018 net dependable capacity.
(b)Based on NSP-Minnesota’s ownership of 59%.
(c)Refuse-derived fuel is made from municipal solid waste.
(d)Black Dog Unit 6 was commissioned and placed into operation in the third quarter of 2018.
(e)Values disclosed are the maximum generation levels for these wind units. Capacity is attainable only when wind conditions are sufficiently available (on-demand net dependable capacity is zero).
NSP-Wisconsin Station, Location and UnitFuelInstalledMW (a)
Steam:
Bay Front-Ashland, WI, 3 UnitsCoal/Wood/Natural Gas1948 - 195656
French Island-La Crosse, WI, 2 UnitsWood/Refuse1940 - 194816(b)
Combustion Turbine:
French Island-La Crosse, WI, 2 UnitsOil1974122
Wheaton-Eau Claire, WI, 5 UnitsNatural Gas/Oil1973234
Hydro:
Various locations, 63 UnitsHydroVarious135
Total563
(a)Summer 2018 net dependable capacity.
(b)Refuse-derived fuel is made from municipal solid waste.
PSCo Station, Location and UnitFuelInstalledMW (a)
Steam:
Comanche-Pueblo, CO (b)
Unit 1Coal1973325
Unit 2Coal1975335
Unit 3Coal2010500(c)
Craig-Craig, CO, 2 Units (d)Coal1979 - 198082(e)
Hayden-Hayden, CO, 2 UnitsCoal1965 - 1976233(f)
Pawnee-Brush, CO, 1 UnitCoal1981505
Cherokee-Denver, CO, 1 UnitNatural Gas1968310
Combustion Turbine:
Blue Spruce-Aurora, CO, 2 UnitsNatural Gas2003264
Cherokee-Denver, CO, 3 UnitsNatural Gas2015576
Fort St. Vrain-Platteville, CO, 6 UnitsNatural Gas1972 - 2009968
Rocky Mountain-Keenesburg, CO, 3 UnitsNatural Gas2004580
Various locations, 6 UnitsNatural GasVarious171
Hydro:
Cabin Creek-Georgetown, CO
Pumped Storage, 2 UnitsHydro1967210
Various locations, 9 UnitsHydroVarious26
Wind:
Rush Creek, CO, 300 unitsWind2018600(g)
Total5,685
(a)Summer 2018 net dependable capacity.
(b)In 2018, the CPUC approved early retirement of PSCo’s Comanche Units 1 and 2 in 2022 and 2025, respectively.
(c)Based on PSCo’s ownership of 67%.
(d)Craig Unit 1 is expected to be retired early in 2025.
(e)Based on PSCo’s ownership of 10%.
(f)Based on PSCo’s ownership of 75% of Unit 1 and 37% of Unit 2.
(g)Generation capability is based on the maximum output level of wind units, including the Rush Creek Wind Project. Capacity is attainable only when wind conditions are sufficiently available (on-demand net dependable capacity is zero).
SPS Station, Location and UnitFuelInstalledMW (a)
Steam:
Cunningham-Hobbs, NM, 2 UnitsNatural Gas1957 - 1965251
Harrington-Amarillo, TX, 3 UnitsCoal1976 - 19801,018
Jones-Lubbock, TX, 2 UnitsNatural Gas1971 - 1974486
Maddox-Hobbs, NM, 1 UnitNatural Gas1967112
Nichols-Amarillo, TX, 3 UnitsNatural Gas1960 - 1968457
Plant X-Earth, TX, 4 UnitsNatural Gas1952 - 1964411
Tolk-Muleshoe, TX, 2 UnitsCoal1982 - 19851,067
Combustion Turbine:
Cunningham-Hobbs, NM, 2 UnitsNatural Gas1998209
Jones-Lubbock, TX, 2 UnitsNatural Gas2011 - 2013334
Maddox-Hobbs, TX, 1 UnitNatural Gas1963 - 197661
Total4,406
(a)Summer 2018 net dependable capacity.

Electric utility overhead and underground transmission and distribution lines (measured in conductor miles) at Dec. 31, 2018:

Conductor MilesNSP-MinnesotaNSP-WisconsinPSCoSPS
500 KV2,917———
345 KV13,5603,4154,0629,028
230 KV2,202—12,0539,675
161 KV6151,823——
138 KV——91—
115 KV7,3721,8175,05114,493
Less than 115 KV86,18532,83178,44625,820

Electric utility transmission and distribution substations at Dec. 31, 2018:

NSP-MinnesotaNSP-WisconsinPSCoSPS
Quantity348203232459

Natural gas utility mains at Dec. 31, 2018:

MilesNSP-MinnesotaNSP-WisconsinPSCoSPSWGI
Transmission9032,0802011
Distribution10,4372,46622,518——

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