PUC September 5, 2006

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PUC September 5, 2006 Bob
Easton
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Miracle Mile Cheyenne - Ault
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Front Range Transmission Improvements
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Program Benefits

• About 500 miles of 45-60 year old 115-kV line
  will be replaced with 230-kV. This is about 15
  of the 3,324 miles of RMR wood pole lines.
• Rebuilding MM-AU at 230-kV will increase TOT3
  capacity by approximately 75 MW, allow for
  increased wheeling revenue, maximize the use of
  the rights-of-way, and improve reliability.
• TOT3 transfer capability will not be reduced by
  up to 400 MW by reconstructing the BC-Erie ROW.
• Additional annual wheeling revenue will exceed
  the incremental cost of rebuilding at 230-kV
  within a few years of project completion.

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TOT3 Project
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TOT3 Partnership Efforts

• The Rocky Mountain Area Transmission Study
  (RMATS) recommended increasing the transmission
  capacity between Wyoming and Colorado.
• RMR has signed a MOU with the Wyoming
  Infrastructure Authority and Trans-Elect, Inc. to
  examine the interest in expansion of TOT3.
• RMR published a notice in the Federal Register
  requesting input from all interested parties
• Next Step Feasibility Study (Powerflow
  Stability) PTI to conduct.