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PART I
Item 1 — Business
DEFINITION OF ABBREVIATIONS AND INDUSTRY TERMS
Xcel Energy Subsidiaries and Affiliates
(current and former)
Cheyenne Cheyenne Light, Fuel and Power Company, a Wyoming corporation
Eloigne Eloigne Co., invests in rental housing projects that qualify for low-income housing tax credits
NCE New Century Energies, Inc.
NRG NRG Energy, Inc., a Delaware corporation and independent power producer
NMC Nuclear Management Company, a wholly owned subsidiary of NSP Nuclear Corporation
NSP-Minnesota Northern States Power Company, a Minnesota corporation
NSP-Wisconsin Northern States Power Company, a Wisconsin corporation
PSCo Public Service Company of Colorado, a Colorado corporation
PSRI PSR Investments, Inc., a manager of corporate-owned life insurance policies
SPS Southwestern Public Service Co., a New Mexico corporation
UE Utility Engineering Corporation, an engineering, construction and design company
utility subsidiaries NSP-Minnesota, NSP-Wisconsin, PSCo, SPS
WGI WestGas Interstate, Inc., a Colorado corporation operating an interstate natural gas pipeline
WYCO WYCO Development LLC
Xcel Energy Xcel Energy Inc., a Minnesota corporation
Federal and State Regulatory Agencies
CPUC Colorado Public Utilities Commission. The state agency that regulates the retail rates, services and
other aspects of PSCo’s operations in Colorado. The CPUC also has jurisdiction over the capital
structure and issuance of securities by PSCo.
DOE United States Department of Energy
EPA United States Environmental Protection Agency
FERC Federal Energy Regulatory Commission. The U.S. agency that regulates the rates and services for
transportation of electricity and natural gas; the sale of wholesale electricity, in interstate
commerce, including the sale of electricity at market-based rates; hydroelectric generation
licensing; and accounting requirements for utility holding companies, service companies, and
public utilities.
IRS Internal Revenue Service
MPSC Michigan Public Service Commission. The state agency that regulates the retail rates, services and
other aspects of NSP-Wisconsin’s operations in Michigan.
MPUC Minnesota Public Utilities Commission. The state agency that regulates the retail rates, services
and other aspects of NSP-Minnesota’s operations in Minnesota. The MPUC also has jurisdiction
over the capital structure and issuance of securities by NSP-Minnesota.
NERC North American Electric Reliability Council
NMPRC New Mexico Public Regulation Commission. The state agency that regulates the retail rates and
services and other aspects of SPS’ operations in New Mexico. The NMPRC also has jurisdiction
over the issuance of securities by SPS.
NDPSC North Dakota Public Service Commission. The state agency that regulates the retail rates, services
and other aspects of NSP-Minnesota’s operations in North Dakota.
NRC Nuclear Regulatory Commission. The federal agency that regulates the operation of nuclear power
plants.
OCC Colorado Office of Consumer Counsel.
PSCW Public Service Commission of Wisconsin. The state agency that regulates the retail rates, services,
securities issuances and other aspects of NSP-Wisconsin’s operations in Wisconsin.
PUCT Public Utility Commission of Texas. The state agency that regulates the retail rates, services and
other aspects of SPS’ operations in Texas.
SDPUC South Dakota Public Utilities Commission. The state agency that regulates the retail rates, services
and other aspects of NSP-Minnesota’s operations in South Dakota.
WDNR Wisconsin Department of Natural Resources
SEC Securities and Exchange Commission
Electric, Purchased Gas and Resource
Adjustment Clauses
AQIR Air-quality improvement rider. Recovers, over a 15-year period, the incremental cost (including
fuel and purchased energy) incurred by PSCo as a result of a voluntary plan to reduce emissions
and improve air quality in the Denver metro area.
DSM Demand-side management. Energy conservation, weatherization and other programs to conserve
or manage energy use by customers.
DSMCA Demand-side management cost adjustment. A clause permitting PSCo to recover demand-side
management costs over five years while non-labor incremental expenses and carrying costs
associated with deferred DSM costs are recovered on an annual basis. Costs for the low-income
energy assistance program are recovered through the DSMCA.
3