THIS AMENDMENT (this “ Amendment ”) is made as of October 25, 2005, among Atlas Pipeline Partners, L.P., a Delaware limited partnership, and Atlas Pipeline Operating Partnership, L.P., a Delaware limited partnership (collectively, “ Gatherer ”), Atlas America, Inc., a Delaware corporation (“ Atlas America ”), Resource Energy, Inc., a Delaware corporation (“ Resource Energy ”), Viking Resources Corporation, a Pennsylvania corporation ( “ Viking Resources ”), Atlas Noble Corp., a Delaware corporation (“ Atlas Noble ”) and Atlas Resources, Inc., a Pennsylvania corporation (“ Atlas Resources ” and collectively with Atlas America, Resource Energy, Viking Resources and Atlas Noble, “ Shipper ”).

RECITALS

     A. Gatherer and Atlas America, Resource Energy and Viking Resources are parties to the Master Natural Gas Gathering Agreement dated February 2, 2000 (the “ February 2000 Agreement ”) and desire to amend the same in accordan