EXHIBIT 10.1

                        DRILLING AND OPERATING AGREEMENT

                                       FOR

                      ATLAS AMERICA SERIES 25-2004(B) L.P.



                                      INDEX



SECTION                                                                                                        PAGE
- -------                                                                                                        ----
                                                                                                             
1.   Assignment of Well Locations; Representations and Indemnification Associated with the
     Assignment of the Lease; Designation of Additional Well Locations;
     Outside Activities Are Not Restricted.......................................................................1

2.   Drilling of Wells; Timing; Depth; Interest of Developer; Right to Substitute Well Locations.................2

3.   Operator - Responsibilities in General; Covenants; Term.....................................................3

4.   Operator's Charges for Drilling and Completing Wells; Payment; Completion Determination;
     Dry Hole Determination; Excess Funds and Cost Overruns - Intangible Drilling Costs; Excess
     Funds and Cost Overruns - Tangible Costs....................................................................4

5.   Title Examination of Well Locations; Developer's Acceptance and Liability; Additional Well Locations........7

6.   Operations Subsequent to Completion of the Wells; Fee Adjustments; Extraordinary Costs;
     Pipelines; Price Determinations; Plugging and Abandonment...................................................7

7.   Billing and Payment Procedure with Respect to Operation of Wells; Disbursements;  Separate Account for
     Sale Proceeds; Records and Reports; Additional Information..................................................9

8.   Operator's Lien; Right to Collect From Oil or Gas Purchaser................................................10

9.   Successors and Assigns; Transfers; Appointment of Agent....................................................11

10.  Operator's Insurance; Subcontractors' Insurance; Operator's Liability......................................12

11.  Internal Revenue Code Election; Relationship of Parties; Right to Take Production in Kind..................13

12.  Effect of Force Majeure; Definition of Force Majeure; Limitation...........................................14

13.  Term.......................................................................................................14

14.  Governing Law; Invalidity..................................................................................14

15.  Integration; Written Amendment.............................................................................14

16.  Waiver of Default or Breach................................................................................14

17.  Notices....................................................................................................15

18.  Interpretation.............................................................................................15

19.  Counterparts...............................................................................................15

     Signature Page.............................................................................................15

     Exhibit A                          Description of Leases and Initial Well Locations
     Exhibits A-l through A-8           Maps of Initial Well Locations
     Exhibit B                          Form of Assignment
     Exhibit C                          Form of Addendum




                        DRILLING AND OPERATING AGREEMENT

THIS AGREEMENT made this 22nd day of June, 2004, by and between ATLAS RESOURCES,
INC., a Pennsylvania corporation (hereinafter referred to as "Atlas" or
"Operator"),

        and

ATLAS AMERICA SERIES 25-2004(B) L.P., a Delaware limited partnership,
(hereinafter referred to as the "Developer").

                                WITNESSETH THAT:

WHEREAS, the Operator, by virtue of the Oil and Gas Leases (the "Leases")
described on Exhibit A attached to and made a part of this Agreement, has
certain rights to develop the eight (8) initial well locations (the "Initial
Well Locations") identified on the maps attached to and made a part of this
Agreement as Exhibits A-l through A-8;

WHEREAS, the Developer, subject to the terms and conditions of this Agreement,
desires to acquire certain of the Operator's rights to develop the Initial Well
Locations and to provide for the development on the terms and conditions set
forth in this Agreement of additional well locations ("Additional Well
Locations") which the parties may from time to time designate; and

WHEREAS, the Operator is in the oil and gas exploration and development
business, and the Developer desires that Operator, as its independent
contractor, perform certain services in connection with its efforts to develop
the aforesaid Initial and Additional Well Locations (collectively the "Well
Locations") and to operate the wells completed on the Well Locations, on the
terms and conditions set forth in this Agreement;

NOW THEREFORE, in consideration of the mutual covenants herein contained and
subject to the terms and conditions hereinafter set forth, the parties hereto,
intending to be legally bound, hereby agree as follows:

1.      ASSIGNMENT OF WELL LOCATIONS; REPRESENTATIONS AND INDEMNIFICATION
        ASSOCIATED WITH THE ASSIGNMENT OF THE LEASE; DESIGNATION OF ADDITIONAL
        WELL LOCATIONS; OUTSIDE ACTIVITIES ARE NOT RESTRICTED.

        (a)     ASSIGNMENT OF WELL LOCATIONS. The Operator shall execute an
                assignment of an undivided percentage of Working Interest in the
                Well Location acreage for each well to the Developer as shown on
                Exhibit A attached hereto, which assignment shall be limited to
                a depth from the surface to the deepest depth penetrated at the
                cessation of drilling operations.

                The assignment shall be substantially in the form of Exhibit B
                attached to and made a part of this Agreement. The amount of
                acreage included in each Initial Well Location and the
                configuration of the Initial Well Location are indicated on the
                maps attached as Exhibits A-l through A-8. The amount of acreage
                included in each Additional Well Location and the configuration
                of the Additional Well Location shall be indicated on the maps
                to be attached as exhibits to the applicable addendum to this
                Agreement as provided in sub-section (c) below.

        (b)     REPRESENTATIONS AND INDEMNIFICATION ASSOCIATED WITH THE
                ASSIGNMENT OF THE LEASE. The Operator represents and warrants to
                the Developer that:

                (i)     the Operator is the lawful owner of the Lease and rights
                        and interest under the Lease and of the personal
                        property on the Lease or used in connection with the
                        Lease;

                (ii)    the Operator has good right and authority to sell and
                        convey the rights, interest, and property;

                (iii)   the rights, interest, and property are free and clear
                        from all liens and encumbrances; and

                (iv)    all rentals and royalties due and payable under the
                        Lease have been duly paid.

                These representations and warranties shall also be included in
                each recorded assignment of the acreage included in each Initial
                Well Location and Additional Well Location designated pursuant
                to sub-section (c) below, substantially in the manner set forth
                in Exhibit B.

                                     Page 1


                The Operator agrees to indemnify, protect and hold the Developer
                and its successors and assigns harmless from and against all
                costs (including but not limited to reasonable attorneys' fees),
                liabilities, claims, penalties, losses, suits, actions, causes
                of action, judgments or decrees resulting from the breach of any
                of the above representations and warranties. It is understood
                and agreed that, except as specifically set forth above, the
                Operator makes no warranty or representation, express or
                implied, as to its title or the title of the lessors in and to
                the lands or oil and gas interests covered by said Leases.

        (c)     DESIGNATION OF ADDITIONAL WELL LOCATIONS. If the parties hereto
                desire to designate Additional Well Locations to be developed in
                accordance with the terms and conditions of this Agreement, then
                the parties shall execute an addendum substantially in the form
                of Exhibit C attached to and made a part of this Agreement
                (Exhibit "C") specifying:

                (i)     the undivided percentage of Working Interest and the Oil
                        and Gas Leases to be included as Leases under this
                        Agreement;

                (ii)    the amount and configuration of acreage included in each
                        Additional Well Location on maps attached as exhibits to
                        the addendum; and

                (iii)   their agreement that the Additional Well Locations shall
                        be developed in accordance with the terms and conditions
                        of this Agreement.

        (d)     OUTSIDE ACTIVITIES ARE NOT RESTRICTED. It is understood and
                agreed that the assignment of rights under the Leases and the
                oil and gas development activities contemplated by this
                Agreement relate only to the Initial Well Locations and the
                Additional Well Locations. Nothing contained in this Agreement
                shall be interpreted to restrict in any manner the right of each
                of the parties to conduct without the participation of the other
                party any additional activities relating to exploration,
                development, drilling, production, or delivery of oil and gas on
                lands adjacent to or in the immediate vicinity of the Well
                Locations or elsewhere.

2.      DRILLING OF WELLS; TIMING; DEPTH; INTEREST OF DEVELOPER; RIGHT TO
        SUBSTITUTE WELL LOCATIONS.

        (a)     DRILLING OF WELLS. Operator, as Developer's independent
                contractor, agrees to drill, complete (or plug) and operate
                eight (8) oil and gas wells on the eight (8) Initial Well
                Locations in accordance with the terms and conditions of this
                Agreement. Developer, as a minimum commitment, agrees to
                participate in and pay the Operator's charges for drilling and
                completing the wells and any extra costs pursuant to Section 4
                in proportion to the share of the Working Interest owned by the
                Developer in the wells with respect to all initial wells. It is
                understood and agreed that, subject to sub-section (e) below,
                Developer does not reserve the right to decline participation in
                the drilling of any of the initial wells to be drilled under
                this Agreement.

        (b)     TIMING. Operator shall begin drilling the first well within
                thirty (30) days after the date of this Agreement, and shall
                begin drilling each of the other initial wells for which payment
                is made pursuant to Section 4(b) of this Agreement before the
                close of the 90th day after the close of the calendar year in
                which this Agreement is entered into by Operator and the
                Developer. Subject to the foregoing time limits, Operator shall
                determine the timing of and the order of drilling the Initial
                Well Locations.

        (c)     DEPTH. All of the wells to be drilled under this Agreement (c)
                shall be:

                (i)     drilled and completed (or plugged) in accordance with
                        the generally accepted and customary oil and gas field
                        practices and techniques then prevailing in the
                        geographical area of the Well Locations; and

                (ii)    drilled to a depth sufficient to test thoroughly the
                        objective formation or the deepest assigned depth,
                        whichever is less.

        (d)     INTEREST OF DEVELOPER. Except as otherwise provided in this
                Agreement, all costs, expenses, and liabilities incurred in
                connection with the drilling and other operations and activities
                contemplated by this Agreement shall be borne and paid, and all
                wells, gathering lines of up to approximately 2,500 feet on the
                Well Location in connection with a natural gas well, equipment,
                materials, and facilities acquired, constructed or installed
                under this Agreement shall be owned, by the Developer in
                proportion to the share of the Working Interest owned by the
                Developer in the wells. Subject to the payment of lessor's
                royalties and other royalties and overriding royalties, if any,
                production of oil and gas from the wells to be drilled under
                this Agreement shall

                                     Page 2


                be owned by the Developer in proportion to the share of the
                Working Interest owned by the Developer in the wells.

        (e)     RIGHT TO SUBSTITUTE WELL LOCATIONS. Notwithstanding the
                provisions of sub-section (a) above, if the Operator or
                Developer determines in good faith, with respect to any Well
                Location, before operations begin under this Agreement on the
                Well Location, that it would not be in the best interest of the
                parties to drill a well on the Well Location, then the party
                making the determination shall notify the other party of its
                determination and its basis for its determination and, unless
                otherwise instructed by Developer, the well shall not be
                drilled. This determination may be based on:

                (i)     the production or failure of production of any other
                        wells which may have been recently drilled in the
                        immediate area of the Well Location;

                (ii)    newly discovered title defects; or

                (iii)   any other evidence with respect to the Well Location as
                        may be obtained.

                If the well is not drilled, then Operator shall promptly propose
                a new well location (including all information for the Well
                Location as Developer may reasonably request) to be substituted
                for the original Well Location. Developer shall then have seven
                (7) business days to either reject or accept the proposed new
                well location. If the new well location is rejected, then
                Operator shall promptly propose another substitute well location
                pursuant to the provisions of this sub-section.

                Once the Developer accepts a substitute well location or does
                not reject it within said seven (7) day period, this Agreement
                shall terminate as to the original Well Location and the
                substitute well location shall become subject to the terms and
                conditions of this Agreement.

3.      OPERATOR - RESPONSIBILITIES IN GENERAL; COVENANTS; TERM.

        (a)     OPERATOR - RESPONSIBILITIES IN GENERAL. Atlas shall be the
                Operator of the wells and Well Locations subject to this
                Agreement and, as the Developer's independent contractor, shall,
                in addition to its other obligations under this Agreement do the
                following:

                (i)     arrange for drilling and completing the wells and, if a
                        gas well, installing the necessary gas gathering line
                        systems and connection facilities;

                (ii)    make the technical decisions required in drilling,
                        testing, completing, and operating the wells;

                (iii)   manage and conduct all field operations in connection
                        with the drilling, testing, completing, equipping,
                        operating, and producing the wells;

                (iv)    maintain all wells, equipment, gathering lines if a gas
                        well, and facilities in good working order during their
                        useful lives; and

                (v)     perform the necessary administrative and accounting
                        functions.

                In performing the work contemplated by this Agreement, Operator
                is an independent contractor with authority to control and
                direct the performance of the details of the work.

        (b)     COVENANTS. Operator covenants and agrees that under this
                Agreement:

                (i)     it shall perform and carry on (or cause to be performed
                        and carried on) its duties and obligations in a good,
                        prudent, diligent, and workmanlike manner using
                        technically sound, acceptable oil and gas field
                        practices then prevailing in the geographical area of
                        the Well Locations;

                (ii)    all drilling and other operations conducted by, for and
                        under the control of Operator shall conform in all
                        respects to federal, state and local laws, statutes,
                        ordinances, regulations, and requirements;

                (iii)   unless otherwise agreed in writing by the Developer, all
                        work performed pursuant to a written estimate shall
                        conform to the technical specifications set forth in the
                        written estimate and all

                                     Page 3


                        equipment and materials installed or incorporated in the
                        wells and facilities shall be new or used and of good
                        quality;

                (iv)    in the course of conducting operations, it shall comply
                        with all terms and conditions, other than any minimum
                        drilling commitments, of the Leases (and any related
                        assignments, amendments, subleases, modifications and
                        supplements);

                (v)     it shall keep the Well Locations and all wells,
                        equipment and facilities located on the Well Locations
                        free and clear of all labor, materials and other liens
                        or encumbrances arising out of operations;

                (vi)    it shall file all reports and obtain all permits and
                        bonds required to be filed with or obtained from any
                        governmental authority or agency in connection with the
                        drilling or other operations and activities; and

                (vii)   it will provide competent and experienced personnel to
                        supervise drilling, completing (or plugging), and
                        operating the wells and use the services of competent
                        and experienced service companies to provide any third
                        party services necessary or appropriate in order to
                        perform its duties.

        (c)     TERM. Atlas shall serve as Operator under this Agreement until
                the earliest of:

                (i)     the termination of this Agreement pursuant to Section
                        13;

                (ii)    the termination of Atlas as Operator by the Developer at
                        any time in the Developer's discretion, with or without
                        cause on sixty (60) days' advance written notice to the
                        Operator; or

                (iii)   the resignation of Atlas as Operator under this
                        Agreement which may occur on ninety (90) days' written
                        notice to the Developer at any time after five (5) years
                        from the date of this Agreement, it being expressly
                        understood and agreed that Atlas shall have no right to
                        resign as Operator before the expiration of the
                        five-year period.

                Any successor Operator shall be selected by the Developer.
                Nothing contained in this sub-section shall relieve or release
                Atlas or the Developer from any liability or obligation under
                this Agreement which accrued or occurred before Atlas' removal
                or resignation as Operator under this Agreement. On any change
                in Operator under this provision, the then present Operator
                shall deliver to the successor Operator possession of all
                records, equipment, materials and appurtenances used or obtained
                for use in connection with operations under this Agreement and
                owned by the Developer.

4.      OPERATOR'S CHARGES FOR DRILLING AND COMPLETING WELLS; PAYMENT;
        COMPLETION DETERMINATION; DRY HOLE DETERMINATION; EXCESS FUNDS AND COST
        OVERRUNS-INTANGIBLE DRILLING COSTS; EXCESS FUNDS AND COST
        OVERRUNS-TANGIBLE COSTS.

        (a)     OPERATOR'S CHARGES FOR DRILLING AND COMPLETING WELLS. All oil
                and gas wells which are drilled and completed under this
                Agreement shall be drilled and completed on a Cost plus 15%
                basis. "Cost," when used with respect to services, shall mean
                the reasonable, necessary, and actual expenses incurred by
                Operator on behalf of Developer in providing the services under
                this Agreement, determined in accordance with generally accepted
                accounting principles. As used elsewhere, "Cost" shall mean the
                price paid by Operator in an arm's-length transaction.

                The estimated price for each of the wells shall be set forth in
                an Authority for Expenditure ("AFE") which shall be attached to
                this Agreement as an Exhibit, and shall cover all ordinary costs
                which may be incurred in drilling and completing each well. This
                includes without limitation, site preparation, permits and
                bonds, roadways, surface damages, power at the site, water,
                Operator's overhead and profit, rights-of-way, drilling rigs,
                equipment and materials, costs of title examinations, logging,
                cementing, fracturing, casing, meters (other than utility
                purchase meters), connection facilities, salt water collection
                tanks, separators, siphon string, rabbit, tubing, an average of
                2,500 feet of gathering line per well in connection with a gas
                well, and geological and engineering services.

        (b)     PAYMENT. The Developer shall pay to Operator, in proportion to
                the share of the Working Interest owned by the Developer in the
                wells, one hundred percent (100%) of the estimated Intangible
                Drilling Costs and Tangible Costs as those terms are defined
                below, for drilling and completing all initial wells on
                execution of

                                     Page 4


                this Agreement. Notwithstanding, Atlas' payments for its share
                of the estimated Tangible Costs as that term is defined below of
                drilling and completing all initial wells as the Managing
                General Partner of the Developer shall be paid within five (5)
                business days of notice from Operator that the costs have been
                incurred. The Developer's payment shall be nonrefundable in all
                events in order to enable Operator to do the following:

                (i)     commence site preparation for the initial wells;

                (ii)    obtain suitable subcontractors for drilling and
                        completing the wells at currently prevailing prices; and

                (iii)   insure the availability of equipment and materials.

                For purposes of this Agreement, "Intangible Drilling Costs"
                shall mean those expenditures associated with property
                acquisition and the drilling and completion of oil and gas wells
                that under present law are generally accepted as fully
                deductible currently for federal income tax purposes. This
                includes all expenditures made with respect to any well before
                the establishment of production in commercial quantities for
                wages, fuel, repairs, hauling, supplies and other costs and
                expenses incident to and necessary for the drilling of the well
                and the preparation of the well for the production of oil or
                gas, that are currently deductible pursuant to Section 263(c) of
                the Internal Revenue Code of 1986, as amended, (the "Code"), and
                Treasury Reg. Section 1.612-4, which are generally termed
                "intangible drilling and development costs," including the
                expense of plugging and abandoning any well before a completion
                attempt. "Tangible Costs" shall mean those costs associated with
                property acquisitions and the drilling and completion of oil and
                gas wells which are generally accepted as capital expenditures
                pursuant to the provisions of the Code. This includes all costs
                of equipment, parts and items of hardware used in drilling and
                completing a well, and those items necessary to deliver
                acceptable oil and gas production to purchasers to the extent
                installed downstream from the wellhead of any well and which are
                required to be capitalized under the Code and its regulations.

                With respect to each additional well drilled on the Additional
                Well Locations, if any, Developer shall pay Operator, in
                proportion to the share of the Working Interest owned by the
                Developer in the wells, one hundred percent (100%) of the
                estimated Intangible Drilling Costs and Tangible Costs for the
                well on execution of the applicable addendum pursuant to Section
                l(c) above. Notwithstanding, Atlas' payments for its share of
                the estimated Tangible Costs of drilling and completing all
                additional wells as the Managing General Partner of the
                Developer shall be paid within five (5) business days of notice
                from Operator that the costs have been incurred. The Developer's
                payment shall be nonrefundable in all events in order to enable
                Operator to do the following:

                (i)     commence site preparation;

                (ii)    obtain suitable subcontractors for drilling and
                        completing the wells at currently prevailing prices; and

                (iii)   insure the availability of equipment and materials.

                Developer shall pay, in proportion to the share of the Working
                Interest owned by the Developer in the wells, any extra costs
                incurred for each well pursuant to sub-section (a) above within
                ten (10) business days of its receipt of Operator's statement
                for the extra costs.

        (c)     COMPLETION DETERMINATION. Operator shall determine whether or
                not to run the production casing for an attempted completion or
                to plug and abandon any well drilled under this Agreement.
                However, a well shall be completed only if Operator has made a
                good faith determination that there is a reasonable possibility
                of obtaining commercial quantities of oil and/or gas.

        (d)     DRY HOLE DETERMINATION. If Operator determines at any time
                during the drilling or attempted completion of any well under
                this Agreement, in accordance with the generally accepted and
                customary oil and gas field practices and techniques then
                prevailing in the geographic area of the Well Location that the
                well should not be completed, then it shall promptly and
                properly plug and abandon the well.

        (e)     EXCESS FUNDS AND COST OVERRUNS-INTANGIBLE DRILLING COSTS. Any
                estimated Intangible Drilling Costs, which are the Intangible
                Drilling Costs set forth on the AFE, paid by Developer with
                respect to any well

                                     Page 5


                which exceed Operator's price specified in sub-section (a) above
                for the Intangible Drilling Costs of the well shall be retained
                by Operator and shall be applied to:

                (i)     the Intangible Drilling Costs for an additional well or
                        wells to be drilled on the Additional Well Locations; or

                (ii)    any cost overruns owed by the Developer to Operator for
                        Intangible Drilling Costs on one or more of the other
                        wells on the Well Locations;

                in proportion to the share of the Working Interest owned by the
                Developer in the wells.

                Conversely, if Operator's price specified in sub-section (a)
                above for the Intangible Drilling Costs of any well exceeds the
                estimated Intangible Drilling Costs, which are the Intangible
                Drilling Costs set forth on the AFE, paid by Developer for the
                well, then:

                (i)     Developer shall pay the additional price to Operator
                        within five (5) business days after notice from Operator
                        that the additional amount is due and owing; or

                (ii)    Developer and Operator may agree to delete or reduce
                        Developer's Working Interest in one or more wells which
                        have not yet been spudded to provide funds to pay the
                        additional amounts to Operator. If doing so results in
                        any excess prepaid Intangible Drilling Costs, then these
                        funds shall be applied to:

                        (a)     the Intangible Drilling Costs for an additional
                                well or wells to be drilled on the Additional
                                Well Locations; or

                        (b)     any cost overruns owed by Developer to Operator
                                for Intangible Drilling Costs on one or more of
                                the other wells on the Well Locations;

                        in proportion to the share of the Working Interest owned
                        by the Developer in the wells.

                The Exhibits to this Agreement with respect to the affected
                wells shall be amended as appropriate.

        (f)     EXCESS FUNDS AND COST OVERRUNS - TANGIBLE COSTS. Any estimated
                Tangible Costs, which are the Tangible Costs set forth on the
                AFE, paid by Developer with respect to any well which exceed
                Operator's price specified in sub-section (a) above for the
                Tangible Costs of the well shall be retained by Operator and
                shall be applied to:

                (i)     the Intangible Drilling Costs or Tangible Costs for an
                        additional well or wells to be drilled on the Additional
                        Well Locations; or

                (ii)    any cost overruns owed by Developer to Operator for
                        Intangible Drilling Costs or Tangible Costs on one or
                        more of the other wells on the Well Locations;

                in proportion to the share of the Working Interest owned by the
                Developer in the wells.

                Conversely, if Operator's price specified in sub-section (a)
                above for the Tangible Costs of any well exceeds the estimated
                Tangible Costs, which are the Tangible Costs set forth on the
                AFE, paid by Developer for the well, then:

                (i)     Developer shall pay the additional price to Operator
                        within ten (10) business days after notice from Operator
                        that the additional price is due and owing; or

                (ii)    Developer and Operator may agree to delete or reduce
                        Developer's Working Interest in one or more wells which
                        have not yet been spudded to provide funds to pay the
                        additional price to Operator. If doing so results in any
                        excess prepaid Tangible Costs, then these funds shall be
                        applied to:

                                     Page 6


                        (a)     the Intangible Drilling Costs or Tangible Costs
                                for an additional well or wells to be drilled on
                                the Additional Well Locations; or

                        (b)     any cost overruns owed by Developer to Operator
                                for Intangible Drilling Costs or Tangible Costs
                                on one or more of the other wells on the Well
                                Locations;

                        in proportion to the share of the Working Interest owed
                        by the Developer in the wells.

                The Exhibits to this Agreement with respect to the affected
                wells shall be amended as appropriate.

5.      TITLE EXAMINATION OF WELL LOCATIONS, DEVELOPER'S ACCEPTANCE AND
        LIABILITY; ADDITIONAL WELL LOCATIONS.

        (a)     TITLE EXAMINATION OF WELL LOCATIONS, DEVELOPER'S ACCEPTANCE AND
                LIABILITY. The Developer acknowledges that Operator has
                furnished Developer with the title opinions identified on
                Exhibit A, and other documents and information which Developer
                or its counsel has requested in order to determine the adequacy
                of the title to the Initial Well Locations and leased premises
                subject to this Agreement. The Developer accepts the title to
                the Initial Well Locations and leased premises and acknowledges
                and agrees that, except for any loss, expense, cost, or
                liability caused by the breach of any of the warranties and
                representations made by the Operator in Section l(b), any loss,
                expense, cost or liability whatsoever caused by or related to
                any defect or failure of the title shall be the sole
                responsibility of and shall be borne entirely by the Developer.

        (b)     ADDITIONAL WELL LOCATIONS. Before beginning drilling of any well
                on any Additional Well Location, Operator shall conduct, or
                cause to be conducted, a title examination of the Additional
                Well Location, in order to obtain appropriate abstracts,
                opinions and certificates and other information necessary to
                determine the adequacy of title to both the applicable Lease and
                the fee title of the lessor to the premises covered by the
                Lease. The results of the title examination and such other
                information as is necessary to determine the adequacy of title
                for drilling purposes shall be submitted to the Developer for
                its review and acceptance. No drilling on the Additional Well
                Locations shall begin until the title has been accepted in
                writing by the Developer. After any title has been accepted by
                the Developer, any loss, expense, cost, or liability whatsoever,
                caused by or related to any defect or failure of the title shall
                be the sole responsibility of and shall be borne entirely by the
                Developer, unless such loss, expense, cost, or liability was
                caused by the breach of any of the warranties and
                representations made by the Operator in Section l(b).

6.      OPERATIONS SUBSEQUENT TO COMPLETION OF THE WELLS; FEE ADJUSTMENTS;
        EXTRAORDINARY COSTS; PIPELINES; PRICE DETERMINATIONS; PLUGGING AND
        ABANDONMENT.

        (a)     OPERATIONS SUBSEQUENT TO COMPLETION OF THE WELLS. Beginning with
                the month in which a well drilled under this Agreement begins to
                produce, Operator shall be entitled to an operating fee of $275
                per month for each well being operated under this Agreement,
                proportionately reduced to the extent the Developer owns less
                than 100% of the Working Interest in the wells. This fee shall
                be in lieu of any direct charges by Operator for its services or
                the provision by Operator of its equipment for normal
                superintendence and maintenance of the wells and related
                pipelines and facilities.

                If a third-party serves as the actual operator of the well, then
                this fee shall be $25 above the actual third-party operator's
                monthly charges. The $25 will be retained by Operator each month
                for reviewing the costs and expenses charged by the third-party
                operator and monitoring the third-party operator's accounting
                and production records for the well on behalf of the Developer.

                The operating fees shall cover all normal, regularly recurring
                operating expenses for the production, delivery and sale of
                natural gas, including without limitation:

                (i)     well tending, routine maintenance and adjustment;

                (ii)    reading meters, recording production, pumping,
                        maintaining appropriate books and records;

                (iii)   preparing reports to the Developer and government
                        agencies; and

                (iv)    collecting and disbursing revenues.

                                     Page 7


                The operating fees shall not cover costs and expenses related to
                the following:

                (i)     the production and sale of oil;

                (ii)    the collection and disposal of salt water or other
                        liquids produced by the wells;

                (iii)   the rebuilding of access roads; and

                (iv)    the purchase of equipment, materials or third party
                        services;

                which, subject to the provisions of sub-section (c) of this
                Section 6, shall be paid by the Developer in proportion to the
                share of the Working Interest owned by the Developer in the
                wells.

                Any well which is temporarily abandoned or shut-in continuously
                for the entire month shall not be considered a producing well
                for purposes of determining the number of wells in the month
                subject to the operating fee.

        (b)     FEE ADJUSTMENTS. The monthly operating fee set forth in
                sub-section (a) above may in the following manner be adjusted
                annually as of the first day of January (the "Adjustment Date")
                each year beginning January l, 2005. Such adjustment, if any,
                shall not exceed the percentage increase in the average weekly
                earnings of "Crude Petroleum, Natural Gas, and Natural Gas
                Liquids" workers, as published by the U.S. Department of Labor,
                Bureau of Labor Statistics, and shown in Employment and Earnings
                Publication, Monthly Establishment Data, Hours and Earning
                Statistical Table C-2, Index Average Weekly Earnings of "Crude
                Petroleum, Natural Gas, and Natural Gas Liquids" workers, SIC
                Code #131-2, or any successor index thereto, since January l,
                2002, in the case of the first adjustment, and since the
                previous Adjustment Date, in the case of each subsequent
                adjustment.

        (c)     EXTRAORDINARY COSTS. Without the prior written consent of the
                Developer, pursuant to a written estimate submitted by Operator,
                Operator shall not undertake any single project or incur any
                extraordinary cost with respect to any well being produced under
                this Agreement reasonably estimated to result in an expenditure
                of more than $5,000, unless the project or extraordinary cost is
                necessary for the following:

                (i)     to safeguard persons or property; or

                (ii)    to protect the well or related facilities in the event
                        of a sudden emergency.

                In no event, however, shall the Developer be required to pay for
                any project or extraordinary cost arising from the negligence or
                misconduct of Operator, its agents, servants, employees,
                contractors, licensees, or invitees.

                All extraordinary costs incurred and the cost of projects
                undertaken with respect to a well being produced shall be billed
                at the invoice cost of third-party services performed or
                materials purchased together with a reasonable charge by
                Operator for services performed directly by it, in proportion to
                the share of the Working Interest owned by the Developer in the
                wells. Operator shall have the right to require the Developer to
                pay in advance of undertaking any project all or a portion of
                the estimated costs of the project in proportion to the share of
                the Working Interest owned by the Developer in the wells.

        (d)     PIPELINES. Developer shall have no interest in the pipeline
                gathering system, which gathering system shall remain the sole
                property of Operator or its Affiliates and shall be maintained
                at their sole cost and expense.

        (e)     PRICE DETERMINATIONS. Notwithstanding anything herein to the
                contrary, the Developer shall pay all costs in proportion to the
                share of the Working Interest owned by the Developer in the
                wells with respect to obtaining price determinations under and
                otherwise complying with the Natural Gas Policy Act of 1978 and
                the implementing state regulations. This responsibility shall
                include, without limitation, preparing, filing, and executing
                all applications, affidavits, interim collection notices,
                reports and other documents necessary or appropriate to obtain
                price certification, to effect sales of natural gas, or
                otherwise to comply with the Act and the implementing state
                regulations.

                                     Page 8


                Operator agrees to furnish the information and render the
                assistance as the Developer may reasonably request in order to
                comply with the Act and the implementing state regulations
                without charge for services performed by its employees.

        (f)     PLUGGING AND ABANDONMENT. The Developer shall have the right to
                direct Operator to plug and abandon any well that has been
                completed under this Agreement as a producer. In addition,
                Operator shall not plug and abandon any well that has been
                drilled and completed as a producer before obtaining the written
                consent of the Developer. However, if the Operator in accordance
                with the generally accepted and customary oil and gas field
                practices and techniques then prevailing in the geographic area
                of the well location, determines that any well should be plugged
                and abandoned and makes a written request to the Developer for
                authority to plug and abandon the well and the Developer fails
                to respond in writing to the request within forty-five (45) days
                following the date of the request, then the Developer shall be
                deemed to have consented to the plugging and abandonment of the
                well.

                All costs and expenses related to plugging and abandoning the
                wells which have been drilled and completed as producing wells
                shall be borne and paid by the Developer in proportion to the
                share of the Working Interest owned by the Developer in the
                wells. Also, at any time after one (1) year from the date each
                well drilled and completed is placed into production, Operator
                shall have the right to deduct each month from the proceeds of
                the sale of the production from the well up to $200, in
                proportion to the share of the Working Interest owned by the
                Developer in the wells, for the purpose of establishing a fund
                to cover the estimated costs of plugging and abandoning the
                well. All of these funds shall be deposited in a separate
                interest bearing escrow account for the account of the
                Developer, and the total amount so retained and deposited shall
                not exceed Operator's reasonable estimate of Developer's share
                of the costs of plugging and abandoning the well.

7.      BILLING AND PAYMENT PROCEDURE WITH RESPECT TO OPERATION OF WELLS;
        DISBURSEMENTS; SEPARATE ACCOUNT FOR SALE PROCEEDS; RECORDS AND REPORTS;
        ADDITIONAL INFORMATION.

        (a)     BILLING AND PAYMENT PROCEDURE WITH RESPECT TO OPERATION OF
                WELLS. Operator shall promptly and timely pay and discharge on
                behalf of the Developer, in proportion to the share of the
                Working Interest owned by the Developer in the wells, the
                following:

                (i)     all expenses and liabilities payable and incurred by
                        reason of its operation of the wells in accordance with
                        this Agreement, such as severance taxes, royalties,
                        overriding royalties, operating fees, and pipeline
                        gathering charges; and

                (ii)    any third-party invoices rendered to Operator with
                        respect to costs and expenses incurred in connection
                        with the operation of the wells.

                Operator, however, shall not be required to pay and discharge
                any of the above costs and expenses which are being contested in
                good faith by Operator.

                Operator shall:

                (i)     deduct the foregoing costs and expenses from the
                        Developer's share of the proceeds of the oil and/or gas
                        sold from the wells; and

                (ii)    keep an accurate record of the Developer's account,
                        showing expenses incurred and charges and credits made
                        and received with respect to each well.

                If the proceeds are insufficient to pay the costs and expenses,
                then Operator shall promptly and timely pay and discharge the
                costs and expenses, in proportion to the share of the Working
                Interest owned by the Developer in the wells, and prepare and
                submit an invoice to the Developer each month for the costs and
                expenses. The invoice shall be accompanied by the form of
                statement specified in sub-section (b) below, and shall be paid
                by the Developer within ten (10) business days of its receipt.

        (b)     DISBURSEMENTS. Operator shall disburse to the Developer, on a
                monthly basis, the Developer's share of the proceeds received
                from the sale of oil and/or gas sold from the wells operated
                under this Agreement, less:

                (i)     the amounts charged to the Developer under sub-section
                        (a); and

                                     Page 9


                (ii)    the amount, if any, withheld by Operator for future
                        plugging costs pursuant to sub-section (f) of Section 6.

                Each disbursement made and/or invoice submitted pursuant to
                sub-section (a) above shall be accompanied by a statement
                itemizing with respect to each well:

                (i)     the total production of oil and/or gas since the date of
                        the last disbursement or invoice billing period, as the
                        case may be, and the Developer's share of the
                        production;

                (ii)    the total proceeds received from any sale of the
                        production, and the Developer's share of the proceeds;

                (iii)   the costs and expenses deducted from the proceeds and/or
                        being billed to the Developer pursuant to sub-section
                        (a) above;

                (iv)    the amount withheld for future plugging costs; and

                (v)     any other information as Developer may reasonably
                        request, including without limitation copies of all
                        third-party invoices listed on the statement for the
                        period.

        (c)     SEPARATE ACCOUNT FOR SALE PROCEEDS. Operator agrees to deposit
                all proceeds from the sale of oil and/or gas sold from the wells
                operated under this Agreement in a separate checking account
                maintained by Operator. This account shall be used solely for
                the purpose of collecting and disbursing funds constituting
                proceeds from the sale of production under this Agreement.

        (d)     RECORDS AND REPORTS. In addition to the statements required
                under sub-section (b) above, Operator, within seventy-five (75)
                days after the completion of each well drilled, shall furnish
                the Developer with a detailed statement itemizing with respect
                to the well the total costs and charges under Section 4(a) and
                the Developer's share of the costs and charges, and any
                information as is necessary to enable the Developer:

                (i)     to allocate any extra costs incurred with respect to the
                        well between Tangible Costs and Intangible Drilling
                        Costs; and

                (ii)    to determine the amount of investment tax credit, if
                        applicable.

        (e)     ADDITIONAL INFORMATION. Operator shall promptly furnish the
                Developer with any additional information as it may reasonably
                request, including without limitation geological, technical, and
                financial information, in the form as may reasonably be
                requested, pertaining to any phase of the operations and
                activities governed by this Agreement. The Developer and its
                authorized employees, agents and consultants, including
                independent accountants shall, at Developer's sole cost and
                expense:

                (i)     on at least ten (10) days' written notice have access
                        during normal business hours to all of Operator's
                        records pertaining to operations, including without
                        limitation, the right to audit the books of account of
                        Operator relating to all receipts, costs, charges,
                        expenses and disbursements under this Agreement,
                        including information regarding the separate account
                        required under sub-section (c); and

                (ii)    have access, at its sole risk, to any wells drilled by
                        Operator under this Agreement at all times to inspect
                        and observe any machinery, equipment and operations.

8.      OPERATOR'S LIEN; RIGHT TO COLLECT FROM OIL OR GAS PURCHASER.

        (a)     OPERATOR'S LIEN. To secure the payment of all sums due from
                Developer to Operator under the provisions of this Agreement the
                Developer grants Operator a first and preferred lien on and
                security interest in the following:

                (i)     the Developer's interest in the Leases covered by this
                        Agreement;

                (ii)    the Developer's interest in oil and gas produced under
                        this Agreement and its proceeds from the sale of the oil
                        and gas; and

                                     Page 10


                (iii)   the Developer's interest in materials and equipment
                        under this Agreement.

        (b)     RIGHT TO COLLECT FROM OIL OR GAS PURCHASER. If the Developer
                fails to timely pay any amount owing under this Agreement by it
                to the Operator, then Operator, without prejudice to other
                existing remedies, may collect and retain from any purchaser or
                purchasers of oil or gas the Developer's share of the proceeds
                from the sale of the oil and gas until the amount owed by the
                Developer, plus twelve percent (12%) interest on a per annum
                basis, and any additional costs (including without limitation
                actual attorneys' fees and costs) resulting from the
                delinquency, has been paid. Each purchaser of oil or gas shall
                be entitled to rely on Operator's written statement concerning
                the amount of any default.

9.      SUCCESSORS AND ASSIGNS; TRANSFERS; APPOINTMENT OF AGENT.

        (a)     SUCCESSORS AND ASSIGNS. This Agreement shall be binding on and
                inure to the benefit of the undersigned parties and their
                respective successors and permitted assigns. However, without
                the prior written consent of the Developer, the Operator may not
                assign, transfer, pledge, mortgage, hypothecate, sell or
                otherwise dispose of any of its interest in this Agreement, or
                any of the rights or obligations under this Agreement.
                Notwithstanding, this consent shall not be required in
                connection with:

                (i)     the assignment of work to be performed for Operator by
                        subcontractors, it being understood and agreed, however,
                        that any assignment to Operator's subcontractors shall
                        not in any manner relieve or release Operator from any
                        of its obligations and responsibilities under this
                        Agreement;

                (ii)    any lien, assignment, security interest, pledge or
                        mortgage arising under Operator's present or future
                        financing arrangements; or

                (iii)   the liquidation, merger, consolidation, or other
                        corporate reorganization or sale of substantially all of
                        the assets of Operator.

                Further, in order to maintain uniformity of ownership in the
                wells, production, equipment, and leasehold interests covered by
                this Agreement, and notwithstanding any other provisions to the
                contrary, the Developer shall not, without the prior written
                consent of Operator, sell, assign, transfer, encumber, mortgage
                or otherwise dispose of any of its interest in the wells,
                production, equipment or leasehold interests covered by this
                Agreement unless the disposition encompasses either:

                (i)     the entire interest of the Developer in all wells,
                        production, equipment and leasehold interests subject to
                        this Agreement; or

                (ii)    an equal undivided interest in all such wells,
                        production, equipment, and leasehold interests.

        (b)     TRANSFERS. Subject to the provisions of sub-section (a) above,
                any sale, encumbrance, transfer or other disposition made by the
                Developer of its interests in the wells, production, equipment,
                and/or leasehold interests covered by this Agreement shall be
                made:

                (i)     expressly subject to this Agreement;

                (ii)    without prejudice to the rights of the Operator; and

                (iii)   in accordance with and subject to the provisions of the
                        Lease.

         (c)      APPOINTMENT OF AGENT. If at any time the interest of the
                  Developer is divided among or owned by co-owners, Operator
                  may, at its discretion, require the co-owners to appoint a
                  single trustee or agent with full authority to do the
                  following:

                (i)     receive notices, reports and distributions of the
                        proceeds from production;

                (ii)    approve expenditures;

                                     Page 11


                (iii)   receive billings for and approve and pay all costs,
                        expenses and liabilities incurred under this Agreement;

                (iv)    exercise any rights granted to the co-owners under this
                        Agreement;

                (v)     grant any approvals or authorizations required or
                        contemplated by this Agreement;

                (vi)    sign, execute, certify, acknowledge, file and/or record
                        any agreements, contracts, instruments, reports, or
                        documents whatsoever in connection with this Agreement
                        or the activities contemplated by this Agreement; and

                (vii)   deal generally with, and with power to bind, the
                        co-owners with respect to all activities and operations
                        contemplated by this Agreement.

                However, all the co-owners shall continue to have the right to
                enter into and execute all contracts or agreements for their
                respective shares of the oil and gas produced from the wells
                drilled under this Agreement in accordance with sub-section (c)
                of Section 11.

10.     OPERATOR'S INSURANCE; SUBCONTRACTORS' INSURANCE; OPERATOR'S LIABILITY.

        (a)     OPERATOR'S INSURANCE. Operator shall obtain and maintain at its
                own expense so long as it is Operator under this Agreement all
                required Workmen's Compensation Insurance and comprehensive
                general public liability insurance in amounts and coverage not
                less than $1,000,000 per person per occurrence for personal
                injury or death and $1,000,000 for property damage per
                occurrence, which shall include coverage for blow-outs and total
                liability coverage of not less than $10,000,000.

                Subject to the above limits, the Operator's general public
                liability insurance shall be in all respects comparable to that
                generally maintained in the industry with respect to services of
                the type to be rendered and activities of the type to be
                conducted under this Agreement. Operator's general public
                liability insurance shall, if permitted by Operator's insurance
                carrier:

                (i)     name the Developer as an additional insured party; and

                (ii)    provide that at least thirty (30) days' prior notice of
                        cancellation and any other adverse material change in
                        the policy shall be given to the Developer.

                However, the Developer shall reimburse Operator for the
                additional cost, if any, of including it as an additional
                insured party under the Operator's insurance.

                Current copies of all policies or certificates of the Operator's
                insurance coverage shall be delivered to the Developer on
                request. It is understood and agreed that Operator's insurance
                coverage may not adequately protect the interests of the
                Developer and that the Developer shall carry at its expense the
                excess or additional general public liability, property damage,
                and other insurance, if any, as the Developer deems appropriate.

        (b)     SUBCONTRACTORS' INSURANCE. Operator shall require all of its
                subcontractors to carry all required Workmen's Compensation
                Insurance and to maintain such other insurance, if any, as
                Operator in its discretion may require.

        (c)     OPERATOR'S LIABILITY. Operator's liability to the Developer as
                Operator under this Agreement shall be limited to, and Operator
                shall indemnify the Developer and hold it harmless from, claims,
                penalties, liabilities, obligations, charges, losses, costs,
                damages, or expenses (including but not limited to reasonable
                attorneys' fees) relating to, caused by or arising out of:

                (i)     the noncompliance with or violation by Operator, its
                        employees, agents, or subcontractors of any local, state
                        or federal law, statute, regulation, or ordinance;

                (ii)    the negligence or misconduct of Operator, its employees,
                        agents or subcontractors; or

                                     Page 12


                (iii)   the breach of or failure to comply with any provisions
                        of this Agreement.

11.     INTERNAL REVENUE CODE ELECTION; RELATIONSHIP OF PARTIES; RIGHT TO TAKE
        PRODUCTION IN KIND.

        (a)     INTERNAL REVENUE CODE ELECTION. With respect to this Agreement,
                each of the parties elects under Section 761(a) of the Internal
                Revenue Code of 1986, as amended, to be excluded from the
                provisions of Subchapter K of Chapter 1 of Sub Title A of the
                Internal Revenue Code of 1986, as amended. If the income tax
                laws of the state or states in which the property covered by
                this Agreement is located contain, or may subsequently contain,
                a similar election, each of the parties agrees that the election
                shall be exercised.

                Beginning with the first taxable year of operations under this
                Agreement, each party agrees that the deemed election provided
                by Section 1.761-2(b)(2)(ii) of the Regulations under the
                Internal Revenue Code of 1986, as amended, will apply; and no
                party will file an application under Section 1.761-2 (b)(3)(i)
                and (ii) of the Regulations to revoke the election. Each party
                agrees to execute the documents and make the filings with the
                appropriate governmental authorities as may be necessary to
                effect the election.

        (b)     RELATIONSHIP OF PARTIES. It is not the intention of the parties
                to create, nor shall this Agreement be construed as creating, a
                mining or other partnership or association or to render the
                parties liable as partners or joint venturers for any purpose.
                Operator shall be deemed to be an independent contractor and
                shall perform its obligations as set forth in this Agreement or
                as otherwise directed by the Developer.

        (c)     RIGHT TO TAKE PRODUCTION IN KIND. Subject to the provisions of
                Section 8 above, the Developer shall have the exclusive right to
                sell or dispose of its proportionate share of all oil and gas
                produced from the wells to be drilled under this Agreement,
                exclusive of production:

                (i)     that may be used in development and producing
                        operations;

                (ii)    unavoidably lost; and

                (iii)   used to fulfill any free gas obligations under the terms
                        of the applicable Lease or Leases.

                Operator shall not have any right to sell or otherwise dispose
                of the oil and gas. The Developer shall have the exclusive right
                to execute all contracts relating to the sale or disposition of
                its proportionate share of the production from the wells drilled
                under this Agreement.

                Developer shall have no interest in any gas supply agreements of
                Operator, except the right to receive Developer's share of the
                proceeds received from the sale of any gas or oil from wells
                developed under this Agreement. The Developer agrees to
                designate Operator or Operator's designated bank agent as the
                Developer's collection agent in any contracts. On request,
                Operator shall assist Developer in arranging the sale or
                disposition of Developer's oil and gas under this Agreement and
                shall promptly provide the Developer with all relevant
                information which comes to Operator's attention regarding
                opportunities for sale of production.

                If Developer fails to take in kind or separately dispose of its
                proportionate share of the oil and gas produced under this
                Agreement, then Operator shall have the right, subject to the
                revocation at will by the Developer, but not the obligation, to
                purchase the oil and gas or sell it to others at any time and
                from time to time, for the account of the Developer at the best
                price obtainable in the area for the production.
                Notwithstanding, Operator shall have no liability to Developer
                should Operator fail to market the production.

                Any purchase or sale by Operator shall be subject always to the
                right of the Developer to exercise at any time its right to take
                in-kind, or separately dispose of, its share of oil and gas not
                previously delivered to a purchaser. Any purchase or sale by
                Operator of any other party's share of oil and gas shall be only
                for reasonable periods of time as are consistent with the
                minimum needs of the oil and gas industry under the particular
                circumstances, but in no event for a period in excess of one (1)
                year.

                                     Page 13


12.     EFFECT OF FORCE MAJEURE; DEFINITION OF FORCE MAJEURE; LIMITATION.

        (a)     EFFECT OF FORCE MAJEURE. If Operator is rendered unable, wholly
                or in part, by force majeure (as defined below) to carry out any
                of its obligations under this Agreement, including but not
                limited to beginning the drilling of one or more wells by the
                applicable times set forth in Section 2(b) or in any Addendum to
                this Agreement, the obligations of the Operator, so far as it is
                affected by the force majeure, shall be suspended during but no
                longer than, the continuance of the force majeure. The Operator
                shall give to the Developer prompt written notice of the force
                majeure with reasonably full particulars concerning it. Operator
                shall use all reasonable diligence to remove the force majeure
                as quickly as possible to the extent the same is within
                reasonable control.

        (b)     DEFINITION OF FORCE MAJEURE. The term "force majeure" shall mean
                an act of God, strike, lockout, or other industrial disturbance,
                act of the public enemy, war, blockade, public riot, lightning,
                fire, storm, flood, explosion, governmental restraint,
                unavailability of drilling rigs, equipment or materials, plant
                shut-downs, curtailments by purchasers and any other causes
                whether of the kind specifically enumerated above or otherwise,
                which directly preclude Operator's performance under this
                Agreement and is not reasonably within the control of the
                Operator including but not limited to, the inability of Operator
                to begin the drilling of the wells subject to this Agreement by
                the applicable times set forth in Section 2(b) or in any
                Addendum to this Agreement due to decisions of third-party
                operators to delay drilling the wells, poor weather conditions,
                inability to obtain drilling permits, access right to the
                drilling site or title problems.

        (c)     LIMITATION. The requirement that any force majeure shall be
                remedied with all reasonable dispatch shall not require the
                settlement of strikes, lockouts, or other labor difficulty
                affecting the Operator, contrary to its wishes. The method of
                handling these difficulties shall be entirely within the
                discretion of the Operator.

13.     TERM.

        This Agreement shall become effective when executed by Operator and the
        Developer. Except as provided in sub-section (c) of Section 3, this
        Agreement shall continue and remain in full force and effect for the
        productive lives of the wells being operated under this Agreement.

14.     GOVERNING LAW; INVALIDITY.

        (a)     GOVERNING LAW. This Agreement shall be governed by, construed
                and interpreted in accordance with the laws of the Commonwealth
                of Pennsylvania.

        (b)     INVALIDITY. The invalidity or unenforceability of any particular
                provision of this Agreement shall not affect the other
                provisions of this Agreement, and this Agreement shall be
                construed in all respects as if the invalid or unenforceable
                provision were omitted.

15.     INTEGRATION; WRITTEN AMENDMENT.

        (a)     INTEGRATION. This Agreement, including the Exhibits to this
                Agreement, constitutes and represents the entire understanding
                and agreement of the parties with respect to the subject matter
                of this Agreement and supersedes all prior negotiations,
                understandings, agreements, and representations relating to the
                subject matter of this Agreement.

        (b)     WRITTEN AMENDMENT. No change, waiver, modification, or amendment
                of this Agreement shall be binding or of any effect unless in
                writing duly signed by the party against which the change,
                waiver, modification, or amendment is sought to be enforced.

16.     WAIVER OF DEFAULT OR BREACH.

        No waiver by any party to any default of or breach by any other party
        under this Agreement shall operate as a waiver of any future default or
        breach, whether of like or different character or nature.

17.     NOTICES.

        Unless otherwise provided in this Agreement, all notices, statements,
        requests, or demands which are required or contemplated by this
        Agreement shall be in writing and shall be hand-delivered or sent by
        registered or certified mail,

                                     Page 14


        postage prepaid, to the following addresses until changed by certified
        or registered letter so addressed to the other party:

                (i)     If to the Operator, to:

                        Atlas Resources, Inc.
                        311 Rouser Road
                        Moon Township, Pennsylvania 15108
                        Attention: President

                (ii)    If to Developer, to:

                        Atlas America Series 25-2004(B) L.P.
                        c/o Atlas Resources, Inc.
                        311 Rouser Road
                        Moon Township, Pennsylvania 15108

        Notices which are served by registered or certified mail on the parties
        in the manner provided in this Section shall be deemed sufficiently
        served or given for all purposes under this Agreement at the time the
        notice is mailed in any post office or branch post office regularly
        maintained by the United States Postal Service or any successor. All
        payments shall be hand-delivered or sent by United States mail, postage
        prepaid to the addresses set forth above until changed by certified or
        registered letter so addressed to the other party.

18.     INTERPRETATION.

        The titles of the Sections in this Agreement are for convenience of
        reference only and shall not control or affect the meaning or
        construction of any of the terms and provisions of this Agreement. As
        used in this Agreement, the plural shall include the singular and the
        singular shall include the plural whenever appropriate.

19.     COUNTERPARTS.

        The parties may execute this Agreement in any number of separate
        counterparts, each of which, when executed and delivered by the parties,
        shall have the force and effect of an original; but all such
        counterparts shall be deemed to constitute one and the same instrument.

        IN WITNESS WHEREOF, the parties hereto have duly executed this Agreement
as of the day and year first above written.

                                        ATLAS RESOURCES, INC.

                                        By:   /s/ Frank P. Carolas
                                              ----------------------------------
                                              Frank P. Carolas, Executive
                                              Vice President

                                        ATLAS AMERICA SERIES 25-2004(B) L.P.

                                        By its Managing General Partner:
                                        ATLAS RESOURCES, INC.

                                        By:   /s/ Frank P. Carolas
                                              ----------------------------------
                                              Frank P. Carolas, Executive
                                              Vice President

                                     Page 15


                                    EXHIBIT A

              DRILLING AND OPERATING AGREEMENT DATED JUNE 22, 2004

                                  INITIAL WELLS

                      ATLAS AMERICA SERIES 25-2004(B) LTD.

          WELL               STATE           COUNTY             TOWNSHIP
- ------------------------  ------------    ------------    ----------------------
        Amrick #2              PA           Fayette            Nicholson

   Big Shanty East #19         PA            McKean            Lafayette

   Big Shanty East #20         PA            McKean            Lafayette

   Big Shanty East #21         PA            McKean            Lafayette

   Big Shanty East #22         PA            McKean            Lafayette

   Big Shanty East #13         PA            McKean            Lafayette

     Troyer Unit #25           PA           Crawford         E. Fallowfield

       Byler #100              PA           Crawford         E. Fallowfield

                                    Exhibit A
                                    (Page 1)


                                 ADDENDUM NO. 1

                       TO DRILLING AND OPERATING AGREEMENT
                              DATED AUGUST 31, 2004

THIS ADDENDUM NO. 1 made and entered into this 31st day of August, 2004, by and
between ATLAS RESOURCES, INC., a Pennsylvania corporation (hereinafter referred
to as "Operator"),

                                       and

ATLAS AMERICA SERIES 25-2004(B) L.P., a Delaware limited partnership,
(hereinafter referred to as the Developer).

                                WITNESSETH THAT:

WHEREAS, Operator and the Developer have entered into a Drilling and Operating
Agreement dated June 22, 2004, (the "Agreement"), which relates to the drilling
and operating of eight (8) wells on the eight (8) Initial Well Locations
identified on the maps attached as Exhibits A-l through A-8 to the Agreement,
and provides for the development on the terms and conditions set forth in the
Agreement of Additional Well Locations as the parties may from time to time
designate; and

WHEREAS, pursuant to Section l(c) of the Agreement, Operator and Developer
presently desire to designate 167 Additional Well Locations described below to
be developed in accordance with the terms and conditions of the Agreement.

NOW, THEREFORE, in consideration of the mutual covenants contained in this
Addendum and intending to be legally bound, the parties agree as follows:

  1. Pursuant to Section l(c) of the Agreement, the Developer hereby authorizes
Operator to drill, complete (or plug) and operate, on the terms and conditions
set forth in the Agreement and this Addendum No. 1, 167 additional wells on the
167 Additional Well Locations described on Exhibit A to this Addendum and on the
maps attached to this Addendum as Exhibits A-9 through A-175.

  2. Operator, as Developer's independent contractor, agrees to drill, complete
(or plug) and operate the additional wells on the Additional Well Locations in
accordance with the terms and conditions of the Agreement and further agrees to
begin drilling the first additional well within thirty (30) days after the date
of this Addendum and to begin drilling all the additional wells on or before
March 30, 2005.

  3. Developer acknowledges that:

      (a)   Operator has furnished Developer with the title opinions identified
            on Exhibit A to this Addendum; and

      (b)   such other documents and information which Developer or its counsel
            has requested in order to determine the adequacy of the title to the
            above Additional Well Locations.

The Developer accepts the title to the Additional Well Locations and leased
premises in accordance with the provisions of Section 5 of the Agreement.

  4. The drilling and operation of the additional wells on the Additional Well
Locations shall be in accordance with and subject to the terms and conditions
set forth in the Agreement as supplemented by this Addendum No. 1 and except as
previously supplemented, all terms and conditions of the Agreement shall remain
in full force and effect as originally written.

  5. This Addendum No. 1 shall be legally binding on, and shall inure to the
benefit of, the parties and their respective successors and permitted assigns.

                                    Exhibit C
                                    (Page 1)


WITNESS the due execution of this Addendum on the day and year first above
written.

                                        ATLAS RESOURCES, INC.

                                        By:   /s/ Frank P. Carolas
                                              ----------------------------------
                                              Frank P. Carolas, Executive
                                              Vice President

                                        ATLAS AMERICA SERIES 25-2004(B) L.P.

                                        By its Managing General Partner:

                                        ATLAS RESOURCES, INC.

                                        By:   /s/ Frank P. Carolas
                                              ----------------------------------
                                              Frank P. Carolas, Executive
                                              Vice President

                                    Exhibit C
                                    (Page 2)


                                    EXHIBIT A
                         ADDENDUM DATED AUGUST 31, 2004
             TO DRILLING AND OPERATING AGREEMENT DATED JUNE 22, 2004
                      ATLAS AMERICA SERIES 25-2004(B) LTD.



WELLS                                     STATE           COUNTY           TOWNSHIP
- -----------------------------------   --------------   ------------   -------------------
                                                                
Kleintop #2                            Pennsylvania     Armstrong        Kiskiminetas
Lytle #10                              Pennsylvania     Armstrong        Kiskiminetas
Disidoro #2                            Pennsylvania      Fayette           Franklin
Disidoro #4                            Pennsylvania      Fayette          Frankllin
Corbin #1                              Pennsylvania      Fayette           Franklin
Hosler #5                              Pennsylvania      Fayette          Jefferson
Allison/Hogsett #7                     Pennsylvania      Fayette           Luzerne
Canestrale #3                          Pennsylvania      Fayette           Luzerne
Gaydos #4                              Pennsylvania      Fayette           Luzerne
Whiteko #5                             Pennsylvania      Fayette           Luzerne
Wilkinson #2                           Pennsylvania      Fayette           Luzerne
Bertovich #3                           Pennsylvania      Fayette          Nicholson
Leckrone/USX #3                        Pennsylvania      Fayette          Nicholson
Angeline/Bender Unit #3                Pennsylvania      Fayette           Redstone
Campbell Farms #1                      Pennsylvania      Fayette           Redstone
Campbell Farms #5                      Pennsylvania      Fayette           Redstone
E & N Land #10                         Pennsylvania      Fayette           Redstone
Kuznar #1                              Pennsylvania      Fayette           Redstone
Stainslaw #1                           Pennsylvania      Fayette           Redstone
Dicenzo #2                             Pennsylvania      Fayette            German
Kovscek/Kovach Unit #1                 Pennsylvania      Fayette            German
Tercho/Shimko #2                       Pennsylvania      Fayette            German
American Legion/USX #1                 Pennsylvania      Fayette          Jefferson
Christofel #1                          Pennsylvania      Fayette          Jefferson
Chubboy #6                             Pennsylvania      Fayette          Jefferson
Dominiak #2                            Pennsylvania      Fayette          Jefferson
Hosler #2                              Pennsylvania      Fayette          Jefferson
Liptak #4                              Pennsylvania      Fayette          Jefferson
Liptak #6                              Pennsylvania      Fayette          Jefferson
Stark #3                               Pennsylvania      Fayette          Jefferson
Stephens/McKnight #5A                  Pennsylvania      Fayette          Jefferson
Vesley #1                              Pennsylvania      Fayette          Jefferson


                                    Exhibit A
                                    (Page 2)


                   EXHIBIT A - ADDENDUM DATED AUGUST 31, 2004
                      ATLAS AMERICA SERIES 25-2004(B) LTD.



WELLS                                      STATE          COUNTY           TOWNSHIP
- -----------------------------------   --------------   ------------   -------------------
                                                                 
Canestrale #14                         Pennsylvania      Fayette           Luzerne
Canestrale #17                         Pennsylvania      Fayette           Luzerne
Canestrale #22                         Pennsylvania      Fayette           Luzerne
Canestrale #23A                        Pennsylvania      Fayette           Luzerne
Celaschi #3                            Pennsylvania      Fayette           Luzerne
Cramer/Lambert #1                      Pennsylvania      Fayette           Luzerne
Holzapeel #3                           Pennsylvania      Fayette           Luzerne
Luzerne Land #2                        Pennsylvania      Fayette           Luzerne
Luzerne Land #4                        Pennsylvania      Fayette           Luzerne
O'Donnell #4                           Pennsylvania      Fayette           Luzerne
Savochka/Gross #9                      Pennsylvania      Fayette           Luzerne
Teslovich #16                          Pennsylvania      Fayette           Luzerne
Watson/Higinbotham #2                  Pennsylvania      Fayette           Luzerne
Whiteko #4                             Pennsylvania      Fayette           Luzerne
Whiteko #6                             Pennsylvania      Fayette           Luzerne
Bryan #1                               Pennsylvania      Fayette           Menallen
Bertovich #2                           Pennsylvania      Fayette          Nicholson
Genovese #5                            Pennsylvania      Fayette          Nicholson
Wright #1                              Pennsylvania      Fayette          Nicholson
Carpenter #4                           Pennsylvania      Fayette            Perry
Carson #4                              Pennsylvania      Fayette            Perry
Coyote Creek Farms #3                  Pennsylvania      Fayette            Perry
Erderly #2                             Pennsylvania      Fayette            Perry
Ferguson #2                            Pennsylvania      Fayette            Perry
Hatalowich #2                          Pennsylvania      Fayette            Perry
Lubic #1                               Pennsylvania      Fayette            Perry
Star Junction/Fish & Game/USX #18      Pennsylvania      Fayette            Perry
Werner/Star Junction/USX #12           Pennsylvania      Fayette            Perry
Allison/Hogsett #9                     Pennsylvania      Fayette           Redstone
Barak/National City #4                 Pennsylvania      Fayette           Redstone
Dorazio #1                             Pennsylvania      Fayette           Redstone
Dorazio #4                             Pennsylvania      Fayette           Redstone
E & N Land #12                         Pennsylvania      Fayette           Redstone
Gaggiani #6A                           Pennsylvania      Fayette           Redstone
Glumac #2                              Pennsylvania      Fayette           Redstone


                                    Exhibit A
                                    (Page 3)


                   EXHIBIT A - ADDENDUM DATED AUGUST 31, 2004
                      ATLAS AMERICA SERIES 25-2004(B) LTD.



WELLS                                      STATE          COUNTY           TOWNSHIP
- -----------------------------------   --------------   ------------   -------------------
                                                                 
Higinbotham #3                         Pennsylvania      Fayette           Redstone
Higinbotham #5                         Pennsylvania      Fayette           Redstone
Jackson Farms #24                      Pennsylvania      Fayette           Redstone
Landman #1                             Pennsylvania      Fayette           Redstone
Lee #9                                 Pennsylvania      Fayette           Redstone
Novak/Melenyzer #1                     Pennsylvania      Fayette           Redstone
Paris #1                               Pennsylvania      Fayette           Redstone
Patterson #8                           Pennsylvania      Fayette           Redstone
Randolph #3                            Pennsylvania      Fayette           Redstone
Ricco #1                               Pennsylvania      Fayette           Redstone
Ricco #2                               Pennsylvania      Fayette           Redstone
Springer #3                            Pennsylvania      Fayette           Redstone
Whetsel #3                             Pennsylvania      Fayette           Redstone
Whetsel #5                             Pennsylvania      Fayette           Redstone
Wolfe #16                              Pennsylvania      Fayette           Redstone
Yocum/Newcomer #6                      Pennsylvania      Fayette           Redstone
Cup #3                                 Pennsylvania      Indiana          Conemaugh
Cup #5                                 Pennsylvania      Indiana          Conemaugh
Nowrytown Sportsmen #2                 Pennsylvania      Indiana          Conemaugh
Prenni #1                              Pennsylvania      Indiana          Conemaugh
Kravetsky #2                           Pennsylvania      Indiana            Young
Hervatin #11                           Pennsylvania       McKean          Lafayette
Hervatin #12                           Pennsylvania       McKean          Lafayette
Hervatin #13                           Pennsylvania       McKean          Lafayette
Hervatin #14                           Pennsylvania       McKean          Lafayette
Hervatin #15                           Pennsylvania       McKean          Lafayette
Hervatin #16                           Pennsylvania       McKean          Lafayette
Hervatin #17                           Pennsylvania       McKean          Lafayette
Hervatin #4                            Pennsylvania       McKean          Lafayette
Hervatin #5                            Pennsylvania       McKean          Lafayette
Hervatin #8                            Pennsylvania       McKean          Lafayette
Hervatin #9                            Pennsylvania       McKean          Lafayette
Messer #35                             Pennsylvania       McKean          Lafayette
Messer #36                             Pennsylvania       McKean          Lafayette
Messer #37                             Pennsylvania       McKean          Lafayette


                                    Exhibit A
                                    (Page 4)


                   EXHIBIT A - ADDENDUM DATED AUGUST 31, 2004
                      ATLAS AMERICA SERIES 25-2004(B) LTD.



WELLS                                      STATE          COUNTY           TOWNSHIP
- -----------------------------------   --------------   ------------   -------------------
                                                               
Messer #38                             Pennsylvania       McKean          Lafayette
Messer #39                             Pennsylvania       McKean          Lafayette
Messer #40                             Pennsylvania       McKean          Lafayette
Messer S59 #1                          Pennsylvania       McKean          Lafayette
Messer S59 #2                          Pennsylvania       McKean          Lafayette
Messer S59 #3                          Pennsylvania       McKean          Lafayette
Messer S59 #4                          Pennsylvania       McKean          Lafayette
Messer S59 #5                          Pennsylvania       McKean          Lafayette
Messer S59 #6                          Pennsylvania       McKean          Lafayette
Montgomery #1                          Pennsylvania       McKean          Lafayette
Montgomery #2                          Pennsylvania       McKean          Lafayette
Montgomery #3                          Pennsylvania       McKean          Lafayette
Montgomery #7                          Pennsylvania       McKean          Lafayette
Montgomery #8                          Pennsylvania       McKean          Lafayette
Young Pine Run #11                     Pennsylvania       McKean          Lafayette
Young Pine Run #12                     Pennsylvania       McKean          Lafayette
Young Pine Run #13                     Pennsylvania       McKean          Lafayette
Young Pine Run #14                     Pennsylvania       McKean          Lafayette
Young Pine Run #15                     Pennsylvania       McKean          Lafayette
Young Pine Run #16                     Pennsylvania       McKean          Lafayette
Bieda #7                               Pennsylvania    Westmoreland        Avonmore
Bieda #8                               Pennsylvania    Westmoreland        Avonmore
Pymatuning Ventures Investors #1       Pennsylvania      Crawford          Conneaut
Pymatuning Ventures Investors #2       Pennsylvania      Crawford          Conneaut
Byler #103                             Pennsylvania      Crawford       E. Fallowfield
Horne #11                              Pennsylvania      Crawford       E. Fallowfield
Shebatka #1                            Pennsylvania      Crawford       E. Fallowfield
Stanisky #1                            Pennsylvania      Crawford       E. Fallowfield
Troyer Unit #24                        Pennsylvania      Crawford       E. Fallowfield
McConnell #4                           Pennsylvania      Crawford         Greenwood
Riley #3                               Pennsylvania      Crawford         Greenwood
Johnston #14                           Pennsylvania      Crawford          Hayfield
Miller Trust #31                       Pennsylvania      Crawford          Sadsbury
Williams #28                           Pennsylvania      Crawford           Vernon
Miklos Unit #1                         Pennsylvania       Mercer          Coolspring


                                    Exhibit A
                                    (Page 5)


                   EXHIBIT A - ADDENDUM DATED AUGUST 31, 2004
                      ATLAS AMERICA SERIES 25-2004(B) LTD.



WELLS                                      STATE          COUNTY           TOWNSHIP
- -----------------------------------   --------------   ------------   -------------------
                                                             
Blaze #1                               Pennsylvania       Mercer        E. Lackawannock
Halliday #1                            Pennsylvania       Mercer             Greene
Halliday #2                            Pennsylvania       Mercer             Greene
Higgins #2                             Pennsylvania       Mercer             Greene
Simpson #1                             Pennsylvania       Mercer             Greene
Stevenson #2                           Pennsylvania       Mercer             Greene
Stevenson #3                           Pennsylvania       Mercer             Greene
St. Michaels Cemetery #1               Pennsylvania       Mercer           Greenville
Bost #1                                Pennsylvania       Mercer           Hempfield
Hallowell #1                           Pennsylvania       Mercer           Hempfield
Sharon Country Club #1                 Pennsylvania       Mercer           Hempfield
Bloom #1                               Pennsylvania       Mercer            Liberty
Ross Unit #1                           Pennsylvania       Mercer           West Salem
St. Paul Homes #2                      Pennsylvania       Mercer           West Salem

HW-1013                                  Tennessee        Morgan      Fork Mountain Field
HW-1014                                  Tennessee        Morgan      Fork Mountain Field
HW-1015                                  Tennessee        Morgan      Fork Mountain Field
HW-1016                                  Tennessee        Morgan      Fork Mountain Field
BR-1020                                  Tennessee        Scott       Fork Mountain Field
BR-1019                                  Tennessee        Scott       Fork Mountain Field

SS Miller #200408                      West Virginia      Roane            Smithfield
SM Sergent #200409                     West Virginia      Roane            Smithfield
WM Looney #200410                      West Virginia      Roane            Smithfield
WM Looney #200411                      West Virginia      Roane            Smithfield
LA Hopkins #200412                     West Virginia      Roane            Smithfield
CC. Hivley #200414                     West Virginia      Roane              Walton
CC. Hivley #200417                     West Virginia      Roane              Walton
GM Summers #200415                     West Virginia      Roane              Walton
CK-58                                  West Virginia      Wayne             Lincoln
CK-95                                  West Virginia      Wayne             Lincoln


                                    Exhibit A
                                    (Page 6)