Document:

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                                                                   Exhibit 10.19

                              THIRD AMENDMENT OF
                              ------------------
                     AMENDED AND RESTATED CREDIT AGREEMENT
                     -------------------------------------

               THIS THIRD AMENDMENT OF AMENDED AND RESTATED CREDIT AGREEMENT
(this "Amendment"), dated as of December 1, 1999, is by and among BASIN
EXPLORATION, INC., a Delaware corporation ("Borrower"), U.S. BANK NATIONAL
ASSOCIATION f/k/a COLORADO NATIONAL BANK ("USB"), UNION BANK OF CALIFORNIA, N.A.
("Union"), TORONTO DOMINION (TEXAS), INC. ("TDT"), and BANK OF AMERICA, N.A., a
national banking association ("BA"), in its capacity as a Lender and as Agent
for Lenders. USB, Union, TDT and BA are herein collectively referred to as
"Lenders."

                                   RECITALS

               A. Borrower and NationsBank, USB and Union entered into an
Amended and Restated Credit Agreement dated as of January 1, 1999, as previously
amended (as so amended, the "Credit Agreement"), in order to set forth the terms
upon which NationsBank, USB and Union would make loans to Borrower and issue
letters of credit at the request of Borrower and by which such loans and letters
of credit would be governed and repaid. Capitalized terms used herein without
definition shall have the same meanings as set forth in the Credit Agreement.

               B. The parties hereto wish to enter into this Amendment in order
to amend certain terms and provisions of the Credit Agreement.

                                   AGREEMENT

               NOW, THEREFORE, in consideration of $10.00 and other good and
valuable consideration, the receipt and sufficiency of which are hereby
acknowledged, the parties hereby agree as follows:

               1.   Credit Agreement. Effective as of the date of this
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Amendment, the Credit Agreement shall be, and hereby is, amended as follows:

                    (a)  The definition of "Borrowing Base (Conforming)" in
Section 1.1 on page 3 of the Credit Agreement shall be deleted, and the
following shall be substituted therefor:

                              "Borrowing Base (Conforming)" means, at any
                               ---------------------------
          time prior to the Maturity Date, that portion of the Borrowing
          Base attributable to Facility A, which shall be the aggregate
          loan value of all Borrowing Base Properties, as determined by
          Lenders in their sole and absolute discretion, in accordance with
          the procedures for conforming oil and gas borrowing base loans
          set forth in Section 3.2 below; provided that
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          the Borrowing Base (Conforming) for the time period from December
          1, 1999 through the next determination of the Borrowing Base
          (Conforming) by Lenders shall be $90,000,000.

                    (b)  The definition of "Revolving Period" in Section 1.1 on
page 13 of the Credit Agreement shall be deleted, and the following shall be
substituted therefor:

                              "Revolving Period" means the time period from
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          the date of this Agreement through November 30, 2002; provided
          that, upon the request of Borrower, Lenders may, in their sole
          discretion, extend such time period at any time and from time to
          time to a date not later than December 31, 2006 by giving written
          notice of such extension to Borrower, but nothing contained in
          this Agreement, the Notes or any other Loan Document shall be
          deemed to commit or require Lenders to agree to any such
          extension.

                    (c)  The following new Section 8.10 shall be inserted
immediately after the end of Section 8.9 on page 56 of the Credit Agreement:

                              Section 8.10.  Funding. Unless Borrower or
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          any Lender has notified Agent prior to the date any payment to be
          made by it is due, that it does not intend to remit such payment,
          Agent may, in its sole discretion, assume that Borrower or said
          Lender, as the case may be, has timely remitted such payment and
          may, in its sole and absolute discretion and in reliance thereon,
          make available such payment to the Person entitled thereto. If
          such payment was not in fact remitted to Agent in immediately
          available funds, then:

                                   (a)  If Borrower has failed to make such
          payment, each Lender shall forthwith on demand repay to Agent the
          amount of such assumed payment made available to such Lender,
          together with interest thereon in respect of each day from and
          including the date such amount was made available by Agent to
          such Lender to the date such amount is repaid to Agent at the
          Federal Funds Rate;

                                   (b)  If any Lender has failed to make
          such payment, Agent shall be entitled to recover such
          corresponding amount on demand from such Lender. If such Lender
          does not pay such corresponding amount forthwith upon Agent's
          demand therefor, Agent shall promptly notify Borrower, and
          Borrower shall pay such corresponding amount to Agent. Agent
          shall also be entitled to recover from such Lender interest on
          such

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          corresponding amount in respect of each day from and including
          the date such corresponding amount was made available by Agent to
          Borrower to the date such corresponding amount is recovered by
          Agent: (1) from such Lender at a rate per annum equal to the
          daily Federal Funds Rate, and (2) from Borrower, at a rate per
          annum equal to the interest rate applicable to such borrowing.
          Nothing herein shall be deemed to relieve any Lender from its
          obligation to fulfill its Commitment or to prejudice any rights
          which Agent or Borrower may have against any Lender as a result
          of any default by such Lender hereunder.

               2.   Loan Documents. All references in any document to the
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Credit Agreement shall refer to the Credit Agreement, as amended pursuant
to this Amendment.

                3.  Representations and Warranties. Borrower hereby certifies to
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Lenders that as of the date of (and after giving effect to) this Amendment,
except as heretofore disclosed to and waived by Lenders: (a) all of Borrower's
representations and warranties contained in the Credit Agreement are true,
accurate and complete in all material respects, and (b) no Default or Event of
Default has occurred and is continuing under the Credit Agreement.

                4.  Continuation of the Credit Agreement. Except as specified in
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this Amendment, the provisions of the Credit Agreement shall remain in full
force and effect, and if there is a conflict between the terms of this Amendment
and those of the Credit Agreement, the terms of this Amendment shall control.
Borrower hereby ratifies, confirms and adopts the Credit Agreement, as amended
hereby.

                5.  Expenses. Borrower shall pay all reasonable expenses
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incurred in connection with the transactions contemplated by this Amendment,
including without limitation all reasonable fees and reasonable expenses of
Lenders' attorneys and all recording and filing fees, charges and expenses.

                6.  Miscellaneous.  This Amendment shall be governed by and
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construed under the laws of the State of Colorado and shall be binding upon and
inure to the benefit of the parties hereto and their successors and assigns.
This Amendment and any and all documents to be delivered in connection herewith
may be executed in any number of counterparts, each of which shall be an
original, but all of which together shall constitute one instrument. Delivery of
this Amendment and any and all documents to be delivered in connection herewith
by any party may be effected, without limitation, by faxing a signed counterpart
of the signature page of this Amendment to BA, in care of David G. Stolfa, Esq.
(303-762-9992), (any party that effects delivery in such manner hereby agreeing
to transmit promptly to BA, in care of David G. Stolfa, Esq., an actual signed
counterpart).

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               EXECUTED as of the date first above written.

                              BASIN EXPLORATION, INC.

                              By: ___________________________________
                                  Vice President/Chief Financial
                                   Officer

                              BANK OF AMERICA, N.A., in its capacity as a
                                 Lender and as Agent for Lenders

                              By: ___________________________________
                                  Principal

                              U.S. BANK NATIONAL ASSOCIATION

                              By: ___________________________________
                                  Vice President

                              UNION BANK OF CALIFORNIA, N.A.

                              By: ___________________________________
                                  Vice President

                              By: ___________________________________
                                  Vice President

                              TORONTO DOMINION (TEXAS), INC.

                              By: ___________________________________
                                  Vice President

                                      -4---------------------------------------------------------------------------------
                       InteliData Technologies Corporation
                       1998 Chief Executive Officer's Plan
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                                    ARTICLE I

                                   DEFINITIONS

     Terms used  herein and not  otherwise  defined  shall have the  meaning set
forth in the Agreement.

     1.1  "Administrator" means the Committee.

     1.2 "Affiliate" means any "subsidiary" or "parent"  corporation (within the
meaning of Section 424 of the Code) of the Company.

     1.3  "Agreement"  means a written  agreement  (including  any  amendment or
supplement thereto) between the Company and the Participant specifying the terms
and conditions of an Option granted to such Participant.

     1.4  "Board" means the Board of Directors of the Company.

     1.5  "Code" means the Internal Revenue Code of 1986, and any amendments
thereto.

     1.6  "Committee" means the Compensation Committee of the Board.

     1.7  "Common Stock" means the common stock of the Company.

     1.8  "Company" means InteliData Technologies Corporation.

     1.9  "Employment  Agreement"  means the  Employment  Agreement  between the
Company and the Participant dated as of April 5, 1999.

     1.10  "Option"  means a stock  option that  entitles the holder to purchase
from the  Company a stated  number  of  shares of Common  Stock at the price set
forth in an Agreement.

     1.11 "Participant" means Alfred S. Dominick, Jr.
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     1.12 "Plan" means the InteliData Technologies Corporation 1998 Chief
Executive Officer's Plan.

     1.13 "Stock  Award"  means Common Stock  awarded to the  Participant  under
Article VI.

     1.14 "Termination Event" shall have the meaning set forth in Article VIII.

                                   ARTICLE II
                                    PURPOSES

     The Plan is intended to induce the Participant to become an employee of the
Company by enabling the  Participant to participate in the future success of the
Company and its  Affiliates  and to associate  his  interests  with those of the
Company and its shareholders. The proceeds received by the Company from the sale
of Common  Stock  pursuant  to this  Plan  shall be used for  general  corporate
purposes.
                                   ARTICLE III
                                 ADMINISTRATION

     The Plan shall be administered by the  Administrator.  Notwithstanding  any
such conditions,  the Administrator may, in its discretion,  accelerate the time
at which any Option may be exercised.  In addition, the Administrator shall have
complete  authority to interpret  all  provisions of this Plan; to prescribe the
form  of  Agreements;  to  adopt,  amend,  and  rescind  rules  and  regulations
pertaining  to  the   administration   of  the  Plan;  and  to  make  all  other
determinations  necessary or advisable for the  administration of this Plan. The
express grant in the Plan of any specific power to the  Administrator  shall not
be  construed  as limiting  any power or  authority  of the  Administrator.  Any
decision made, or action taken, by the  Administrator  or in connection with the
administration  of  this  Plan  shall  be  final  and  conclusive.  Neither  the
Administrator  nor any member of the Committee  shall be liable for any act done
in good  faith  with  respect  to this Plan or any  Option or Stock  Award.  All
expenses of administering this Plan shall be borne by the Company.

                                   ARTICLE IV
                              STOCK SUBJECT TO PLAN

     4.1  Shares Issued.  Upon the award of shares of Common Stock pursuant to
          -------------
a Stock Award,  the Company may issue shares of Common Stock from its authorized
but  unissued  Common  Stock.  Upon the  exercise  of any Option the Company may
deliver to the  Participant (or the  Participant's  broker if the Participant so
directs), shares of Common Stock from its authorized but unissued Common Stock.

<PAGE>

     4.2  Aggregate  Limit. The maximum aggregate number of shares of Common
          -----------------
Stock that may be issued under this Plan  pursuant to the exercise of Options is
1,200,000  shares.  The maximum  aggregate number of shares of Common Stock that
may be issued  under this Plan as Stock  Awards is 200,000  shares.  The maximum
aggregate  number of shares that may be issued  under this Plan shall be subject
to adjustment as provided in Article VII.

                                    ARTICLE V
                                     OPTIONS

     5.1  Award.  The Administrator will specify the number of shares of Common
          -----
Stock to be covered by an award of an Option.

     5.2  Option Price.   The price per share for Common Stock purchased on the
          -------------
exercise of an Option shall be determined by the Administrator on the date
of grant

     5.3  Payment. Unless otherwise  provided by the Agreement,  payment of the
          --------
Option  price  shall  be made in cash  or a cash  equivalent  acceptable  to the
Administrator.  If the Agreement provides,  payment of all or part of the Option
price may be made by  surrendering  shares of Common  Stock to the  Company.  If
Common Stock is used to pay all or part of the Option price, the sum of the cash
and  cash  equivalent  and  the  fair  market  value  (determined  as of the day
preceding the date of exercise) of the shares  surrendered must not be less than
the Option price of the shares for which the Option is being exercised.

                                   ARTICLE VI
                                  STOCK AWARDS

     The Administrator may grant a Stock Award to the Participant and such award
shall  specify the number of shares of Common Stock  covered by the Stock Award;
provided,  however,  that the  Participant may not receive Stock Awards for more
than 200,000 shares of Common Stock.

                                   ARTICLE VII
                     ADJUSTMENT UPON CHANGE IN COMMON STOCK

     The maximum  number of shares as to which  Options and Stock  Awards may be
granted under this Plan, the terms of outstanding Stock Awards and Options,  and
the per individual limitations on the number of shares or for which Stock Awards
and Options may be granted,  shall be adjusted as the Committee  shall determine
to be  equitably  required  in the event that (a) the Company (i) effects one or
more stock dividends, stock split-ups,  subdivisions or consolidations of shares
or (ii) engages in a transaction to which Section 424 of the Code applies
<PAGE>

or (b) there  occurs any other event  which,  in the  judgment of the  Committee
necessitates such action.  Any determination  made under this Article VII by the
Committee shall be final and conclusive.

                                  ARTICLE VIII
                           Effect of Change Of Control

     In the event of termination of Participant's employment within one (1) year
following a Change in Control (as defined in the Employment Agreement) either by
the Company other than for Cause (as defined in the Employment  Agreement) or by
Participant  for Good Reason (as defined in the Employment  Agreement)  (each, a
"Termination  Event"),  the entire Option shall become  immediately  exercisable
through the earlier of (i) the second  anniversary  of the  Termination  Date or
(ii) the  Expiration  Date,  and the Common Stock  issuable upon exercise of the
Option shall be subject to adjustment  in accordance  with Article VII hereof in
the event of any changes  affecting  the Common Stock as a result of such Change
in Control.

     In the event that any payment to the Participant under this Article VIII is
subject to any  federal  or state  excise  tax,  the  Company  shall pay to such
Participant an additional amount equal to any such excise tax imposed,  pursuant
to terms of the Employment Agreement.

     Notwithstanding  anything to the contrary set forth in the  Agreement,  the
provisions of this Article VIII shall not apply to the Participant if, prior to
                   ------------
the date on which a Change in Control  takes place (i) the Option ceases to vest
for any of the reasons set forth in Section 5(b) of the  Agreement,  or (ii) the
Participant  ceases to serve in his current position within the group that is of
equal or greater  responsibility that the position held by the Participant as of
the Grant Date as may be reasonably determined by the Committee.  Otherwise, the
provisions of this Article VIII shall apply to Participant.
                   ------------

                                   ARTICLE IX
                                    AMENDMENT

     The  Board may amend or  terminate  this Plan from time to time;  provided,
however,  that no amendment may become effective until  shareholder  approval is
obtained if (i) the amendment increases the aggregate number of shares of Common
Stock that may be issued under the Plan, (ii) the amendment changes the class of
individuals  eligible to become  Participants or (iii) the amendment  materially
increases the benefits that may be provided under the Plan. No amendment  shall,
without  the  Participant's  consent,   adversely  affect  any  rights  of  such
Participant  under  any  Stock  Award or  Option  outstanding  at the time  such
amendment is made.

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