July 22, 2003

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July 22, 2003
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Corporate Overview

• Operations in 12 Western and Midwestern states
• 4th largest combination natural gas and
  electricity company in the nation
• 4.9 million gas and electric customers
• Natural Gas Deliveries
• 396 Bcf Annual
• 3.3 Bcf Peak Day

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Operating Companies

• NSP Minnesota
• NSP Wisconsin
• PSCo
• CLFP
• SPS

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NSP-Minnesota

• System Requirements
• MN ND Service Area
• 420,000 Customers
• Peak Day Deliveries - 670,000 Dth
• Annual Deliveries 82 Bcf
• Annual growth 1-2

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NSP-Wisconsin

• System Requirements
• WI MI Service Area
• 94,000 Customers
• Peak Day Deliveries - 125,000 Dth
• Annual Deliveries 21 Bcf
• Annual growth 2

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NSP-Generation

• System Requirements
• MN, ND, SD, MI and WI Service Territory
• Current Annual Gas Use 10 Bcf
• Projected Annual Gas Use (2010-2015) 20 to 40
  Bcf
• Growth
• MERP 954 MW (online 2009-2010)
• IRP 655 MW (online 2006)

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NSP-Minnesota Wisconsin

• Typical Supply Sources by Pipeline
• Northern Natural Gas (NNG)
• Viking Gas Transmission (VGT)
• Great Lakes Transmission Company (GLTC)
• ANR Pipeline Company (ANR)
• Williston Basin Interstate Pipeline (WBI)

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PSCo-LDC

• System Requirements
• Colorado Service Area
• Over 1 million Customers
• Peak Day Deliveries 1.7 Bcf
• Annual Deliveries 144 Bcf
• Annual growth 1-2

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PSCo-Generation

• System Requirements
• Colorado Service Area
• Peak Day Deliveries 400,000 Dth
• Annual Deliveries 65 Bcf

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PSCo LDC Generation

• Typical Supply Sources by Pipeline
• Colorado Interstate Gas (CIG)
• Wyoming Interstate Gas (WIC)
• Southern Star (WNG)
• KinderMorgan (KM)

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CLFP

• System Requirements
• Wyoming Service Area
• 30,000 Customers
• Peak Day Deliveries 40,000 Dth
• Annual Deliveries 4.5 Bcf
• Annual growth 1-2

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CLFP

• Typical Supply Sources by Pipeline
• Colorado Interstate Gas (CIG)
• Wyoming Interstate Gas (WIC)

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Contacts

• NSP
• Tim Carter Manager Gas Supply, Mid-Continent (303)
  308-2791
• Jeff Ishee Gas Buyer [phone]
• PSCo
• Sue Dolan Manager Gas Supply, Rockies (303)
  308-6179
• Craig Rozman Gas Buyer [phone]
• Jim Lynch Gas Buyer [phone]