Xcel Energy 2011 Annual Report Download - page 53

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43
Our operating results may fluctuate on a seasonal and quarterly basis and can be adversely affected by milder weather.
Our electric and natural gas utility businesses are seasonal, and weather patterns can have a material impact on our operating
performance. Demand for electricity is often greater in the summer and winter months associated with cooling and heating.
Because natural gas is heavily used for residential and commercial heating, the demand for this product depends heavily upon
weather patterns throughout our service territory, and a significant amount of natural gas revenues are recognized in the first and
fourth quarters related to the heating season. Accordingly, our operations have historically generated less revenues and income
when weather conditions are milder in the winter and cooler in the summer. Unusually mild winters and summers could have an
adverse effect on our financial condition, results of operations, or cash flows.
Item 1B — Unresolved Staff Comments
None.
Item 2 — Properties
Virtually all of the utility plant property of NSP-Minnesota and NSP-Wisconsin is subject to the lien of their first mortgage bond
indentures. Virtually all of the electric utility plant property of PSCo and SPS is subject to the lien of their first mortgage bond
indentures.
Electric Utility Generating Stations:
NSP-Minnesota
Station, Location and Unit
Fuel
Installed
Summer 2011
Net Dependable
Capability (MW)
Steam:
A.S. King-Bayport, Minn., 1 Unit
......................
Coal 1968 511
Sherco-Becker, Minn.
Unit 1 ................................
.............
Coal 1976 680
Unit 2 ................................
.............
Coal 1977 682
Unit 3 ................................
.............
Coal 1987 507 (a)
Monticello-Monticello, Minn., 1 Unit
..................
Nuclear 1971 554
Prairie Island-Welch, Minn.
Unit 1 ................................
.............
Nuclear 1973 521
Unit 2 ................................
.............
Nuclear 1974 519
Black Dog-Burnsville, Minn., 2 Units
..................
Coal/Natural Gas 1955-1960 232
Various locations, 4 Units
.............................
Wood/Refuse-derived fuel
Various 36 (b)
Combustion Turbine:
Angus Anson-Sioux Falls, S.D., 3 Units
................
Natural Gas 1994-2005 338
Black Dog-Burnsville, Minn., 2 Units
..................
Natural Gas 1987-2002 236
Blue Lake-Shakopee, Minn., 6 Units
...................
Natural Gas 1974-2005 462
High Bridge-St. Paul, Minn., 3 Units
...................
Natural Gas 2008 486
Inver Hills-Inver Grove Heights, Minn., 6 Units
.........
Natural Gas 1972 282
Riverside-Minneapolis, Minn., 3 Units
.................
Natural Gas 2009 470
Various locations, 18 Units
............................
Natural Gas Various 107
Wind:
Grand Meadow-Mower County, Minn., 67 Units
........
Wind 2008 101 (c)
Nobles-Nobles County, Minn., 134 Units
...............
Wind 2010 201 (c)
Total 6,925
(a) Based on NSP-Minnesota’s ownership of 59 percent. In November 2011, Sherco Unit 3, jointly owned by NSP-Minnesota and Southern Minnesota
Municipal Power Agency, experienced a significant failure of its turbine, generator and exciter systems. See Note 5 to the consolidated financial statements.
(b) Refuse-derived fuel is made from municipal solid waste.
(c) This capacity is only available when wind conditions are sufficiently high enough to support the noted generation values above. Therefore, the on-demand
net dependable capacity is zero.