1980
Spring
Con Ed (New York, NY)
Fall
Con Ed (New York, NY)

1981
Spring
Rochester Gas & Electric
Fall
Public Service Electric & Gas

1982
Spring
Philadelphia Electric
Fall
Pennsylvania Power & Light

1983
Spring
Jersey Central Power & Light
Fall
Central Hudson Gas & Electric

1984
Spring
Atlantic Electric
Fall
Boston Electric Corporation

1985
Spring
Penelec
Fall
Delmarva Power

1986
Spring
New York Power Authority
Fall
Cleveland Electric Illuminating Company

1987
Spring
PEPCO
Fall
Consolidated Edison

1988
Spring
Orange & Rockland
Fall
Virginia Power

1989
Spring
Met-Ed
Fall
P S E & G

1990
Spring
Baltimore Gas & Electric
Fall
Atlantic Electric

1991
Spring
Delmarva Power
Fall
Commonwealth Edison

1992
Spring
Penelec Met-Ed
Fall
PEPCO

1993
Spring
Cleveland Elect.Illuminating Co./ Centerior Energy
Fall
Virginia Power

1993
Spring
Cleveland Elect. Illuminating Co.
Fall
Virginia Power

1994
Spring
Consolidated Edison (New York, NY)
Fall
Niagara Mohawk (Saratoga Springs, NY)

1995
Spring
Virginia Power (Chester, VA)
Fall
Rochester Gas & Electric (Rochester, NY)

1996
Spring
Delmarva Power (Ocean City, MD)
Fall
General Public Utilities (GPU) (Johnstown, PA)

1997
Spring
Con Ed (New York, NY)
Fall
Illinois Power (Decatur, IL)

1998
Spring
PSE & G (Edison, NJ)
Fall
Niagara Mohawk (Niagara Falls, NY)

1999
Spring
Commonwealth Edison (Elgin, IL)
Fall
PEPCO (Greenbelt, MD)

2000
Spring
Peco Energy (Plymouth Meeting, PA)
Fall
United Illuminating (Mystic, CT)

2001
Spring
PSE&G (Long Branch, NJ)
Fall
Niagara Mohawk (Saratoga Springs, NY)

2002
Spring
Illinois Power (Decatur, IL)
Fall
National Grid, USA (Auburn, MA)

2003
Spring
Rochester Gas & Electric (Rochester, NY)
Fall
Conective Power (Atlantic City, NJ)

2004
Spring
PSE&G (Edison, NJ)
Fall
Peco Energy (Plymouth Meeting, PA)

2005
Spring (Postponed)
Fall
United Illuminating (Westbrook, CT)

2006
Spring
Ameren (St. Louis Mo.)
Fall
PPL (Allentown, PA)

2007
Spring
First Energy
Fall
Pepco Holdings, Inc. (Washington, DC)

2008
Spring
Ameren
Fall
T.B.D.