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									                            Conference Call Summary
                     NorthWestern Energy Load Data Request
                                 April 30, 2008

Attendance
Those participating in the Load Data Request Conference Call included:

    Name                             Organization
Casey Munter           Big Horn Electric Cooperative
Oscar Armendariz       Bonneville Power Administration (BPA)
Andrea Cicarelli       BPA
Gene Carlson           CHS
Pete Larson            ConocoPhillips
Penny Morgan           ConocoPhillips
Jason Stinson          Conoco Phillips
Donald Quander         Consultant, Large Industrials
Ken Waterson           ExxonMobile
Steve Walsh            Montana Resources, Inc.
John Cummings          PPL Energy Plus
Rose Spear             PPL Energy Plus
Cheryl Mayo            PPL of Montana
Randall Smith          PPL of Montana
Todd Tregidga          PPL of Montana
Carrie Boysun          SME G&T
Pat Clevenger          Smurfit-Stone Container
Dale Solstrom          Stillwater Mining Company
Frank Jarvenpaa        Western Area Power Administration (WAPA)
Sharon Crane           ?
Cheryl Evans           ?
Kathleen Bauer         NorthWestern Energy (NWE)
Rick Edwards           NWE
Vicki Judd             NWE
Melvin Kotur           NWE
John Leland            NWE
Mark Mallard           NWE
Cathy Mathews          NWE
Deborah Singer         NWE
Howard Skjervem        NWE


Standards of Conduct & Anti-Trust Policy
John Leland began the meeting by reviewing NWE’s standards of conduct and safeguards and
antitrust policy.




April 30, 2008 NWE Load Data Request Conference Call Summary                        Page 1
Agenda
• PowerPoint Presentation
  – Confidentially
  – Reporting Requirements
  – Definitions
  – Calendar for Data Submittals
• Data Spreadsheets
  – Instruction Sheet
  – Peak Load
  – Energy Load
• Questions

Power Point Presentation
Confidentiality- John Leland read the FERC Standards of Conduct and the Antitrust Policy at the
start of the meeting. Cathy Mathews stated that NWE follows the Critical Energy Infrastructure
Information disclosure procedure. These documents are posted on NWE’s OASIS at:
http://www.oatioasis.com/NWMT/ . It was emphasized that only aggregate numbers are sent to
outside entities, such as WECC. The detailed data is used only in NWE’s internal studies.

Reporting Requirements – FERC Order 890, Paragraph 487, states the data submittal
requirements for Point-to-Point Customers. The NWE Tariff (OATI), Paragraph 31.6, states the
data submittal requirements for Network Customers. NERC Standards MOD-016 through
MOD-021 state the data submittal requirements for Load Serving Entities. These documents are
posted on NWE’s OASIS at: http://www.oatioasis.com/NWMT/ in the Transmission Planning
folder, then in the Customer L&R Data Request Information file.

Question – Are large customers classified the same as LSE’s?
Answer – No, LSE’s, which includes the co-ops, are covered by the MOD Standards. The large
customers are covered under the tariff for Network Customers and FERC Order 890 for Point-to-
Point Customers.

Definitions – Peak Load is reported in Megawatts. The monthly number is the maximum hourly
value out of 24 hours per day, for 28, 30, or 31 days per month. That is, the highest integrated
one-hour peak in MW that occurred during the month.

Question – Do you want coincident or non-coincident peak numbers?
Answer – Non-coincident numbers. NWE will adjust these numbers to reflect coincident peaks.

Energy Load is reported in Megawatt Hours. The monthly number is the total energy in MWH
used during the month. That is, the sum of the energy used per hour for the entire month.

The Peak Load and Energy Load are requested per Delivery Point. NWE’s forecast procedure
assigns load to individual substations and load buses. If delivery points are lumped together,
NWE must figure out how to distribute it to the individual load buses. Point-to-Point customers
must report their data per delivery point. Network customers are asked to report their data per
delivery point if possible. If this kind of data is not available, then please provide the best data


April 30, 2008 NWE Load Data Request Conference Call Summary                                 Page 2
that you have.

Question - When several substations are located in close proximity, can the aggregate numbers
be reported?
Answer - NWE assigns load to individual substations and load buses. NWE is asking for the
load per individual substation. It does not have to be broken down per feeder.

Several changes are being made in the 2008 Load Request. NWE will populate the spreadsheets
whenever possible. Data that was submitted last year and information received internally
showing customer data will be used. The 2008 row will be split into two sections. The forecast
numbers will have a light yellow background, and the actual numbers will have a light green
background. For the years 2020-2024, NWE will request the seasonal winter and seasonal
summer peak. Also, only one specific winter day and one specific summer day in 2008 will be
requested for NWE coincidental comparison.

The recipients of the Load Data Request will have to complete the Peak Data Sheet, the Load
Data Sheet and the Resource Data Sheet. They should check the data that is already filled in and
update it as needed. Data needs to be entered in the cells that are empty.

This data will be used in two different ways. The detailed data will be used by NWE only for
Local Area Transmission Planning studies, which are done 5, 10, and 15 years into the future.
This data is also used to establish the state of the system for Interconnect Studies. The aggregate
data will be used to respond to data requests from WECC, Northwest Power Pool (NWPP),
Northern Tier Transmission Group (NTTG), and the Pacific Northwest Utilities Conference
Committee (PNUCC). Their Reports are available on the individual web sites: www.wecc.biz,
www.nttg.biz and www.pnucc.org.

If the data is missing or inaccurate, growth rates, based on historical trends, could be too high or
too low. Step changes due to expansion or reduction would be missed. To comply with the
NERC Standards, NWE must make sure all load is counted once and only once. If the forecast is
based on data that is too low, transfer capacity on transmission lines would not be adequate. If
the forecast is based on data that is too high, improvements, such as reconductoring, adding
equipment, or new lines would be done before they were actually needed, which would result in
increased costs.

Calendar for Data Submittals – NWE will be sending the 2008 Loads and Resources Data
Request to Large Customers, LSE’s and Generators in September, 2008. It will be due back to
NWE the first part of November so NWE can comply with the deadlines established by NWPP,
WECC, and PNUCC. The Loads and Resources Data Request for 2008 Actuals will be sent the
first part of January 2009. It will be due back to NWE the end of January so NWE can comply
with the WECC and NTTG deadlines. Dates given are approximations based on when last year’s
data requests were due.

Data Spreadsheets
Instruction Spreadsheet – The Instruction Spreadsheet has been modified to reflect the changes in
the Peak Load, Energy Load, and Resources Spreadsheets.


April 30, 2008 NWE Load Data Request Conference Call Summary                                Page 3
Peak Data Spreadsheet - Firm Peak Load data is the maximum firm load served each month.
Historical (Actual) data starting in January 2007 through your most current month in 2008 is
requested. The Firm Peak Load, for the winter peak and the summer peak in 2008, is requested
for a specific day, which corresponds to NWE’s peak day. The maximum peak load is requested
for the entire month. The 2008 row will be split into two sections. The forecast numbers from
the 2007 report will be highlighted in yellow and the actual numbers received internally will be
highlighted in green. For future years 2009-19, Firm Peak Load data is load that is expected to
be served at the time of the monthly peak load. For future years 2020-24, Firm Peak Load data
is load that is expected to be served at the time of the seasonal peak, one entry for summer peak
and one entry for winter peak.

If you have any Interruptible Peak Demand programs and/or Direct Control Load Management
programs, please check the box immediately under the Firm Peak Load data entries. NWE will
provide you with the applicable data entry spreadsheet for these types of load.

Question – What about when the data comes from NWE, and we have no other data?
Answer - We will fill in as much data as we have available.

Question – Will 07 data be requested?
Answer – Yes, since NWE will be asking for one year of historical data. Hopefully, NWE will
be able to fill in most of this data.

Question – Does the winter peak have to be January, February or March?
Answer – No, just the highest peak for the winter season, whether it is in Nov, Dec. Jan. or
February.

Comment – NWE will reformat the seasonal peak section on the Peak Spreadsheet to clarify the
time periods.

Question – Are load reports net of conservation?
Answer – Yes, The numbers reported should already be adjusted for conservation.

Energy Data Spreadsheet - Energy Load data per month is the total energy in MWH used during
the month. This is the Sum of the Energy used per hour for the entire month. Historical (Actual)
data starting in January 2007 through your most current month in 2008 is requested. The 2008
row will be split into two sections. The forecast numbers from the 2007 report will be
highlighted in yellow and the actual numbers received internally will be highlighted in green.
For future years 2009-19, Energy Load data is the total energy in MWH that is expected to be
used during the month. Energy Load will not be requested for 2020-2024.

Question – How should the total megawatts be reported?
Answer – NWE rounds off to the highest MW when reporting data to others. WECC actually
asks for this number in Gigawatts. However, for NWE’s internal use, we would like 2-3 places
after the decimal if available (e.g., report 123 KW as 0.123 MW).

Resources Data Spreadsheet - This worksheet includes two tables: The Source Table and the
Reserve Table.

April 30, 2008 NWE Load Data Request Conference Call Summary                               Page 4
Source Table: The sources of your power can be separated into three categories: 1) “Specific
Generator” if the source is from a specific generator, 2) “Network Generation” if the source is
from a network generator, or 3) "Import" if the source is imported from outside the NWE
balancing area.
Reserve Table: Provide a list of reserves that you carry, if any, and the source and location of the
reserves.

There is a comment box attached to the Source Column Name provided for you to make your
selection. In addition, a year of past history (2007 data) is requested for the “Resources Data”
worksheet. Note that the sum of the source(s) of your generation should equal your load plus
reserves you carry.

Question - Large Customers reserve resources are included in the Supply/Transmission tariff.
Should they try to break this out?
Answer - Yes, to the extent that it can be broken out. This additional information would be
helpful to NWE.

Temperature Sensitivity Spreadsheet - If you do not develop your load forecast in a manner that
includes a temperature sensitivity variable, you do not need to respond to the information
requested in this worksheet. The requested load temperature sensitivity information will provide
a basis for adjusting peak load forecasts to extreme weather conditions. The average (1-in-2
peak) weather condition should be the forecast weather used in your peak load forecast response
herein. If possible, please provide a best estimate of your load temperature sensitivity for
forecast data not developed using statistical load forecasting methodologies. NWE is trying to
make its forecast as accurate as possible. Any Temperature Sensitivity Data received will be
incorporated into this forecast.

Questions
Comment – WAPA will be going through the same exercise and will work with NWE on the co-
ops, basically the same as last year.

Question – Is NWE going to ask for a written assessment or narrative discussion of load growth
with assumptions?
Answer – That is a good idea – so, yes this year NWE will ask for a narrative discussion. WECC
asks NWE for the basis of its forecast. More information would help NWE with the WECC
request.

Question – Would additional space be provided for footnotes on future forecasts along with
anything else the customer could disclose in context of the numbers provided and how the
forecast is done?
Answer – Yes, the Peak Spreadsheet will have an optional textbox added at the bottom for any
additional information the customer can provide.

Question – For large customers, who may have up to 20 delivery points, will there be additional
sheets or will the spreadsheet be extended as many rows as necessary to allow for the
information for each delivery point?
Answer – Probably additional rows will be added to keep the spreadsheet from getting too big.

April 30, 2008 NWE Load Data Request Conference Call Summary                                Page 5
When the customer receives this spreadsheet in September, it will already be formatted to allow
for information from more than one delivery point.

Question – Can NWE forward this presentation to participants?
Answer – This presentation will be posted on NWE’s OATIOASIS Website as public
information. A Summary of the Conference Call will also be posted on the Website.
See http://www.oatioasis.com/northwestern/. Scroll down the left side to the Transmission
Planning folder. After opening the Transmission Folder, scroll down to the Customer L & R
Data Request file. In this file you can choose several documents concerning the L & R Data
Request including the Presentation and Conference Call Summary.


Contact Information

Cathy Mathews
Telephone: (406) 497-4397
Email: cathy.mathews@northwestern.com

John Leland
Telephone: (406) 497- 3383
Email: John.Leland@northwestern.com




April 30, 2008 NWE Load Data Request Conference Call Summary                             Page 6

								
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