EXHIBIT 99.1
LIST OF GROUP MEMBERS
The group members filing this Schedule 13G pursuant to Rule 13d-1(d) are:
Crosstex Holdings, L.P., a Delaware limited partnership;
Crosstex Energy, Inc., a Delaware corporation;
Crosstex Holdings GP, LLC, a Delaware limited liability company;
Yorktown Energy Partners IV, L.P., a Delaware limited partnership;
Yorktown IV Company LLC, a Delaware limited liability company;
Yorktown Energy Partners V, L.P., a Delaware limited partnership; and
Yorktown V Company LLC, a Delaware limited liability company.