- Alliance Exploration
- ARCO
- Bryan Texas Utilities.
- BWOC, Inc.
- Brazos Resources Corporation
- BreitBurn Energy Partners
- Brushy Water Supply Corp.
- CFS Financial Services
- Chesapeake Energy
- City of Arlington
- City of Bryan
- City of College Station
- Clayton Williams Energy, Inc.
- Clipper
- ConocoPhillips
- Dart Oil & Gas
- Delhi Pipeline Company
- Devon Energy Corp.
- Duke Energy Field Services
- EOG Resources
- Enervest
- Entergy
- Freese and Nichols Engineering
- Getty Oil & Gas
- GSI Oil and Gas, Inc.
- Gulf States Utilities
- HEA Exploration Company
- Houston Lighting and Power
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- Kerr McGee
- King Operating
- Kling Engineering
- Lone Star East One, LLC
- Lone Star Gas
- Main Street Homes
- Malcolm Pirnie Engineering Co.
- Marshall Exploration
- Millican Oil Company
- Mobil
- Newfield Exploration Inc.
- OSR Water Supply Co.
- Prodeco Exploration Company
- Pro Tech Operating, Inc.
- Rabon Metcalf Engineering Co.
- Shell E & P Co.
- Sklar & Phillips
- Sonat Exploration, Inc.
- Sonerra Resources Corp.
- Southwest Gas & Pipeline
- Texaco
- Texas Utilities
- The Louisiana Land and Exploration Company
- The United States Department of Justice
- United Oil & Minerals,
- Wellborn Special Utility District
- Williams Exploration & Production
- XTO Energy
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