Exhibit 23(b) CONSENT OF UNITED ENERGY DEVELOPMENT CONSULTANTS, INC. CONSENT OF UNITED ENERGY DEVELOPMENT CONSULTANTS, INC. INDEPENDENT PETROLEUM ENGINEERING & GEOLOGICAL CONSULTING FIRM UEDC, as an independent petroleum engineering and geological consulting firm, hereby consents to the use of: o its Geologic Evaluation, dated May 6, 2003, for the Crawford and Mercer Prospect Areas, Pennsylvania; o its Geologic Evaluation dated May 6, 2003, for the Fayette Prospect Area, Pennsylvania; and o its Geologic Evaluation dated May 6, 2003, for the Armstrong Prospect Area, Pennsylvania in the Registration Statement and any supplements thereto, including post- effective amendments, for Atlas America Public #12-2003 Program, and to all references to UEDC as having prepared such report and as an expert concerning such report. UEDC, Inc. /s/ Robin Anthony ________________________________________ Robin Anthony 5/08/03 Geologist Pittsburgh, Pennsylvania