AMENDMENT AND JOINDER TO OMNIBUS AGREEMENT DATED DECEMBER 18, 2006, AMONG ATLAS PIPELINE PARTNERS, L.P. AND ATLAS PIPELINE OPERATING PARTNERSHIP, L.P., ATLAS AMERICA, INC., RESOURCE ENERGY, LLC, VIKING RESOURCES, LLC, ATLAS ENERGY RESOURCES, LLC, AND...

Exhibit 10.25

AMENDMENT AND JOINDER TO OMNIBUS AGREEMENT

 DATED DECEMBER 18, 2006, AMONG ATLAS PIPELINE

PARTNERS, L.P. AND ATLAS PIPELINE OPERATING

 PARTNERSHIP, L.P., ATLAS AMERICA, INC., RESOURCE

ENERGY, LLC, VIKING RESOURCES, LLC, ATLAS ENERGY

RESOURCES, LLC, AND ATLAS ENERGY OPERATING

COMPANY, LLC