ALABAMA
Alabama Power
Utility Service Corp.


ALASKA
Electric Power Systems


ARKANSAS
Oklahoma Gas & Electric Co.
Southwestern Power Adminstration


ARIZONA
Oklahoma Gas & Electric Co.
Bureau of Reclamation
Electrical Reliability Services
Salt River Project


CALIFORNIA
Bureau of Reclamation
Chevron/Texaco
Electrical Reliability Services
Glendale Water & Power, City of
Hampton Tedder Technical Services
High Voltage Maintenance Corp.
Imperial Irrigation District
Los Angeles Department of Water & Power
NASA, Ames Research Center
Pacific Gas & Electric Co.
Sacramento Municipal Utility District
San Diego Gas & Electric
Santa Clara, City of (Silicon Valley Power)
WAPA (Sacramento)


COLORADO
Aquila
Bureau of Reclamation
Colorado Springs Dept. of Utilities
Electrical Reliability Services
Tri-State Generation & Transmission
WAPA (Rocky Mountain)


CONNECTICUT
Northeast Utilities System


FLORIDA
Alabama Power
Electrical Reliability Services
Gulf Power Co.
Progress Energy
Tampa Electric Co.


GEORGIA
Electrical Reliability Services
Georgia Power Co.


HAWAII
Hawaiian Electric Co.
Maui Electric Co.


IDAHO
Avista Corp.
Bureau of Reclamation
Idaho Power Co.


ILLINOIS
Ameren-UE
Ameren-CILCO
Ameren-CIPS
Ameren-IP
High Voltage Maintenance Corp.
Southern Illinois Power Co-Op


IOWA
Muscatine Power & Water
Northwest Iowa Power Cooperative
Omaha Public Power District
WAPA (Upper Great Plains)


INDIANA
High Voltage Maintenance Corp.


KANSAS
Board of Public Utilities, Kansas City
Kansas City Power & Light Co.
Midwest Energy
Power Systems Diagnostics
Sunflower Electric Power Corp.


KENTUCKY
High Voltage Maintenance Corp.


LOUISIANA
Central Louisiana Electric Co.
Electrical Reliability Services
Southern Power System


MARYLAND
Allegheny Power Co.


MASSACHUSETTS
High Voltage Maintenance Corp.
Three-C Electrical Co., Inc.


MASSACHUSETTS
High Voltage Maintenance Corp.
Three-C Electrical Co., Inc.


MICHIGAN
High Voltage Maintenance Corp.


MINNESOTA
East River Electric Power Cooperative
Great River Energy



MISSISSIPPI
Mississippi Power Co.



MISSOURI
Ameren-UE
Aquila
Board of Public Utilities, Kansas City
City of Independence
City Utilities of Springfield
Electrical Reliability Services
Independence Power & Light
KAMO Power
Kansas City Power and Light Co.
Southwestern Power Administration



MONTANA
Bureau of Reclamation
Northwestern Energy
US Army Corps of Engineers
WAPA (Upper Great Plains)
WAPA (Rocky Mountain)



NEBRASKA
Nebraska Public Power District
Omaha Public Power District
US Army Corps of Engineers
Northwestern Energy
WAPA (Upper Great Plains)



NEVADA
Bureau of Reclamation
Electrical Reliability Services
Hampton Tedder Technical Services
Nevada Power Co.
Valley Electric Association
WAPA (Sierra Nevada)



NEW JERSEY
Public Service Electric & Gas



NEW MEXICO
Arizona Public Service Co.
Hampton Tedder Technical Services
Public Service Company of New Mexico
Texas-New Mexico Power Co.
Tri-State Generation & Transmission



NEW YORK
High Voltage Maintenance Corp.
Keyspan Energy
Mirant, Inc.
New York Power Authority
New York State Electric & Gas



NORTH CAROLINA
Duke Power Co.
Progress Energy



NORTH DAKOTA
Basin Electric Power Cooperative
Central Power Electric Cooperative
Great River Energy
WAPA (Upper Great Plains)



OHIO
High Voltage Maintenance Corp.


OKLAHOMA
Grand River Dam Authority
KAMO Power
Oklahoma Gas & Electric Co.
Public Service Company of Oklahoma
Southwest Electric Co.
Southwestern Power Administration
Western Farmers Electric Cooperative


OREGON
Central Lincoln PUD
Electrical Reliability Services
Eugene Water & Electric Board
Idaho Power Co.
Portland General Electric Co.


PENNSYLVANIA
Allegheny Power Co.
Duquesne Light Co.
High Voltage Maintenance Corp.
Pennsylvania Power & Light


SOUTH CAROLINA
Duke Power Co.
Progress Energy
South Carolina Electric & Gas Co.


SOUTH DAKOTA
Basin Electric Power Cooperative
East River Electric Cooperative
US Army Corps of Engineers
WAPA (Upper Great Plains)


TENNESSEE
Electric Power Board of Chattanooga


TEXAS
AEP
CenterPoint Energy
Electrical Reliability Services
Shermco Industries, Inc.
Texas-New Mexico Power Co.
Tidal Power Services
TXU
Universal Utility Services


UTAH
Bureau of Reclamation
Intermountain Power Service Corp.


VIRGINA
Allegheny Power Co.


WASHINGTON
Avista Corporation
Bureau of Reclamation
Douglas County PUD
Electrical Reliability Services
Grant County PUD
Grays Harbor PUD
Seattle City Light
Snohomish County PUD
US Army Corps of Engineers


WEST VIRGINA
Allegheny Power Co.


WISCONSIN
High Voltage Maintenance Corp.
Wisconsin Public Service


WYOMING
Basin Electric Power Cooperative
Tri-State Generation & Transmission
WAPA (Rocky Mountain)


CANADA
AltaLink Management, Ltd.
BC Hydro
FortisBC
Hydro One
New Brunswick Power Co.