Rocky Mountain Power Five Year Study Kick Off Meeting

© 2000 PACIFICORP | PAGE 2 Agenda –Who is invited? –Basic Study Purpose –Third Party Contributions –Study areas – First Half 2010

© 2000 PACIFICORP | PAGE 3 Who is invited? –Any individual is welcome –City and Municipal officials –Generation producers –Large industrial users –Equipment producers

© 2000 PACIFICORP | PAGE 4 Study Restrictions –CIPS  The reliability of the energy grid depends not only on physical assets, but cyber assets. The North American Electric Reliability Corporation (NERC) realized that, along with protecting the physical assets, Critical Cyber Assets also need to be protected to keep the energy grid secure. –Confidentiality

© 2000 PACIFICORP | PAGE 5 Why Prepare the Studies? –FERC/WECC required –Provides a good round map for future –Provides needed justification to sell new system additions

© 2000 PACIFICORP | PAGE 6 Basic Understanding of the Study –Field Study  Document equipment  Verify system ratings and settings –Identify System Problems and Future Requirements –Generate a Report  Brief Understanding of the Area  List Equipment ratings  Fault duties, operation schemes  Lists system Problems and Future Requirements

© 2000 PACIFICORP | PAGE 7 Third Party Contributions –Load and Forecast Projects –New Points of Delivery –System Power Flow Model –Anticipated Future System Upgrades  Including block load increases

© 2000 PACIFICORP | PAGE 8 Study Areas for First Half 2010 –Montpelier Study  Area encompasses the area around Bear Lake from Georgetown ID in the north to Woodruff UT in the south, and from Garden City UT in the West to Kemmerer WY in the East –Honeyville~Malad Study  Area encompasses nearly all Box Elder County, a small portion of Cache County and a portion of Oneida County in Idaho. In all there is about 3600 square miles of service territory. About 42 percent of this area is not electrified and potentially may never become so. –Pavant Study  Area encompasses the area near Delta, from Lynndyl in the north to Clear lake in the southwest and Fillmore in the southeast.

© 2000 PACIFICORP | PAGE 9 MONTPELIER STUDY Tim Reynolds

© 2000 PACIFICORP | PAGE 10 Montpelier Study Area –Georgetown in the North –Dividing line in the West is the Cache Nation Forest –The 69 kV line from Naughton to the Montpelier area –Woodruff to the South

© 2000 PACIFICORP | PAGE 11 Montpelier Study Info –There are no Municipalities in the study area –There are a total of two Transmission Substations,13 Distribution Substation, and three Transmission Customer –Transmission Voltages are 69 and 46 kV

© 2000 PACIFICORP | PAGE 12 Montpelier Study –Comments or Questions?

© 2000 PACIFICORP | PAGE 13 HONEYVILLE~MALAD STUDY Scott Murdock

© 2000 PACIFICORP | PAGE 14 Honeyville~Malad Study Area –Malad City in the North –Dividing line to the East is the Cache Nation Forest –Brigham City to the South –Ben Lomond while outside of the area, is its main source for power.

© 2000 PACIFICORP | PAGE 15 Honeyville~Malad Study Info –There is one Municipality, Brigham City, in the study area –There is a total of two Transmission Substations (138 kV),15 Distribution Substations, ten Transmission Customers and one municipality –Transmission Voltages are 138, 69 and 46 kV

© 2000 PACIFICORP | PAGE 16 Honeyville~Malad Study –Comments or Questions?

© 2000 PACIFICORP | PAGE 17 PAVANT STUDY Seth Riding

© 2000 PACIFICORP | PAGE 18 Pavant Study Area –Lynndyl to the North –Pavant and Delta are central sources for the area –The 69 kV line to Clear Lake and Graymont Western in the Southwest –The 46 kV line to Flowell and Fillmore in the Southeast

© 2000 PACIFICORP | PAGE 19 Pavant Study Info –There are several Municipalities in the study area –There are a total of 2 Transmission Substations, 8 Distribution Substation, and 6 Transmission Customers –Transmission Voltages are 230, 69 and 46 kV

© 2000 PACIFICORP | PAGE 20 Pavant Study –Comments or Questions?

© 2000 PACIFICORP | PAGE 21 Thank You for Coming