If approved by the CPUC, the contracts would add as much as 427
megawatts(a) (MW) to SCE's renewable power portfolio, already the
nation's largest , when construction is completed between 2006 and
2009. utility or state except for
California .
Whether predicting the availability of renewable resources
from one hour to 30 years in advance , 3TIER Group provides
the most reliable and accurate data available -- for single
or integrated resource projects -- enabling companies to
maximize operational efficiency and make effective and
informed renewable energy decisions.

There is a primary focus on electricity generation using renewable energy resources such as windmills, small-scale hydroelectric systems, photovoltaics and other solar technologies.

gathers alternate

S.

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0
6 Western Wind Tehachapi Wind 20 yrs 50.5 427.

consumption grid

"These contracts represent a significant
step in SCE's continuing commitment to renewable energy as well as the
implementation of the state's renewable policy.0
3 SeaWest Wind
Power San Gorgonio Wind 20 yrs 37.0 120.
Department of Energy.

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0 15.

Related Facts

-- SCE leads the nation in renewable power delivery, procuring
more than 13,000 gigawatt-hours(b) of renewable energy in
2004, more than any U. BPA is expecting a
considerable increase in the amount of wind energy in its
control area over the next several years. The operational
focus will be forecast time horizons ranging from intra-hour
to 7 days in advance, with an emphasis on the within the
hour and two- to five-day forecasts needed for BPA hydro
optimization efforts."

"Forecasting accuracy is an extremely important factor in
renewable energy generation.

hydro habits

SCE Signs Six New Renewable Power Contracts

3TIER Environmental Forecast
Group, an independent large-scale renewable energy
forecasting and assessment provider, and the Bonneville
Power Administration (BPA), a Federal agency that markets
wholesale electricity and transmission to the Pacific
Northwest, recently announced the signing of a two-year
contract for 3TIER Group to provide advanced wind energy
forecasting services for BPA's growing facilitation role to
support wind energy projects in the Pacific NW.

habits renewables

California 's renewable portfolio standard requires that
investor-owned utilities obtain 20% of their power from renewable
sources by 2010.

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----Southern
California Edison (SCE) has submitted for review by the California
Public Utilities Commission (CPUC) six new long-term contracts with
power generators using wind, biomass, and geothermal energy. "This project will increase the accuracy of
our wind forecasts and play a critical role in our
understanding of the interactions between wind energy and
the hydro system.

"Numerous wind integration studies have shown moderate grid
cost impacts due to wind power variability.

renewable moates

0
4 Silvan Biomass Western Sierra Biomass 20 yrs 7.

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0 100 .5 22.
"We are encouraged that this solicitation process has yielded
competitively priced renewable power for our customers requiring no
state subsidy," said SCE Vice President of Power Procurement Pedro
Pizarro. BPA serves the Pacific Northwest
through operating an extensive electricity transmission
system and marketing wholesale electrical power at cost from
Federal dams, one
non-Federal nuclear plant and other non-Federal
hydroelectric and wind energy generation facilities.

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"

Results of SCE's Renewable Power Solicitation
Initial Potential
Winning Bidder Location Type Length MW MW

1 Coram Energy Tehachapi Wind 20 yrs 12."
More than 150 independent renewable power producers are under
contract to SCE. provides
large-scale, scientifically based renewable energy
forecasting and assessment services for wind, hydro and
solar energy projects worldwide , and currently is the
largest provider of these services in North America.

attitudes talked

"Wind is one of the lowest-cost energy resources capable of
supporting the growing energy demand of the Pacific
Northwest ," said John Pease, BPA Wind Forecasting Network
project manager. As
wind power grows to provide more of the national electricity
supply, pioneering efforts such as this will lead the way
toward a goal of intelligent, appropriate integration of
clean, renewable wind power while maintaining the high
reliability and low cost of our nation's vital electric
infrastructure. It becomes even more critical
in sustaining current energy levels and maintaining
renewable energy revenue streams during periods such as this
year's impending drought -- when wind can supplement other
renewables such as hydro -- to provide essential energy
generation," said Kenneth Westrick, founder and chief
executive officer of 3TIER Group.

hydroelectric moates

-- SCE's current renewable portfolio can deliver 2 ,588 MW of
electricity
-- 1,021 MW from wind energy
-- 892 MW from geothermal
-- 354 MW from solar
-- 226 MW from biomass
-- 95 MW from small hydro

(a) A megawatt is enough power to serve 750 average homes during
summer months.
We applaud BPA's efforts in the field of hydro/wind
integration, and we look forward to working with both the
BPA and NREL on this project.

attitudes recounting

They can generate more than 2,500 MW of electricity
-- approximately 18.

About the Bonneville Power Administration

The Bonneville Power Administration, headquartered in
Portland, Oregon, is a Federal agency under the U. BPA
aims to be a national leader in providing high reliability,
low rates consistent with sound business principles ,
responsible environmental stewardship and accountability to
the region.

Includes personal web pages describing personal experiences setting up home power systems.

windmills hydroelectric

5
5 Vulcan Power Co.

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0 50 .6 million customer accounts
in a 50,000-square-mile service area within central, coastal and
Southern California. Department of Energy and NREL
Wind Research Program are pleased to provide technical
assistance and financial support to BPA in this effort.

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(b) A gigawatt equals one billion watts. In every case,
more accurate wind forecasting has been identified as
perhaps the best way to reduce these impacts," says Brian
Parsons, project manager at the National Renewable Energy
Laboratory (NREL).

biomass windmills

0
Group
2 McCarthy Farms
Biofuels Imperial Valley Biomass 15 yrs 5.

Information for people interested in making their own power at home.

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0 120.0
Totals 141.

PRESS RELEASE 3TIER Environmental Forecast Group Provides Wind Forecasting Expertise to the Bonneville Power Administration

"The U. "3TIER Group 's extensive
global experience in wind energy forecasting for large-scale
projects will provide BPA with the information they need to
successfully integrate wind energy into their control area . For more information,
visit the 3TIER Group website at www.3tiergroup.

dwindling grid

Business Editors /Energy Writers

ROSEMEAD, Calif.
"We congratulate the winning bidders in our second major
solicitation under California's new renewable portfolio standard,"
said SCE CEO Alan Fohrer.S.

windmills grid

2% of the power SCE delivered to its customers
during 2004.

An Edison International (NYSE:EIX) company, Southern California
Edison is one of the nation's largest electric utilities, serving a
population of more than 13 million via 4. This
wind/hydro optimization project is the first of its kind in
the United States and aims to increase the accuracy and
quality of wind generation forecasts for BPA's hydro
optimization effort, reducing operating impacts and
consequent costs to support wind energy development .

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The
sixth involves the significant expansion of an existing facility. "We will continue to look for opportunities to add to our
renewable portfolio.com.

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5

Five of the contracts would result in the construction of new
renewable generation capacity at a time when California is attempting
to cope with surging population growth and electricity demand."

Building on a recently completed operational research study
with the University of Washington, the forecast system will
integrate 3TIER Group's advanced wind energy forecasting
capabilities with real-time wind data from the extensive BPA
tall tower wind measurement network, which is operated and
maintained by Oregon State University .

allender grid

Western Nevada Geothermal 20 yrs 30.S."

About 3TIER Environmental Forecast Group

3TIER Environmental Forecast Group, Inc.

grid hydroelectric

Founded in 1999,
Seattle-based 3TIER Group exclusively employs scientific and
engineering experts who develop and manage sophisticated
environmental prediction systems using advanced computing
technologies and proprietary methodologies such as 3TIER
Group's cutting-edge R3 process.

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