MANAGEMENT AGREEMENT DATED DECEMBER 18, 2006 AMONG ATLAS ENERGY RESOURCES, LLC, ATLAS ENERGY OPERATING COMPANY, LLC, AND ATLAS ENERGY MANAGEMENT, INC.

Exhibit 10.24

MANAGEMENT AGREEMENT DATED DECEMBER 18, 2006

AMONG ATLAS ENERGY RESOURCES, LLC, ATLAS ENERGY

OPERATING COMPANY, LLC, AND

ATLAS ENERGY MANAGEMENT, INC.

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