Operator Contact Information

• Brigham Oil & Gas, LP

• BTA Oil Producers, LLC.

• Condor Petroleum, Inc.

• ConocoPhillips (Burlington Resources)

• Continental Resources, Inc.

• Denbury Resources

• Eagle Operating, Inc.

• Enerplus Resources USA

• EOG Resources, Inc.

• Fidelity Exploration & Production Company

• G3 Operating, LLC

• Hess Corporation

• Hunt Oil Company

• Liberty Resources, LLC

• Luff Exploration Company

• Marathon Oil Company

• Murex Petroleum Company

• Newfield Rocky Mountains

• OXY USA Inc.

• Peak Energy Resources, LLC

• Petro-Hunt, LLC

• QEP Resources

• Sagebrush Resources, LLC

• Samson Resources Company

• SM Energy

• Spotted Hawk Development (SHD Oil & Gas, LLC)

• Sundance Energy, Inc.

• Tracker Resource Development, LLC

• Ward Williston Oil Company

• Whiting Oil & Gas Corporation

• XTO Energy

• Zenergy Operating Company, LLC