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Atlanta Gas Light Company

Atmos Energy

Chattanooga Gas

Duke Energy Carolinas

Duke Energy Florida

Florida City Gas

Florida Power Light

Florida Public Utilities

Georgia Transmission Corp.

Georgia Power Company

Jointly Owned Natural Gas

Magnolia River Services

Oglethorpe Power Corporation

POND Engineering

SAPP Engineering and Services

Southern Company Gas

Southern Telecom, Inc.

The Southern Company

Virginia Natural Gas