EXHIBIT 10.42 [COMPASS BANK LETTERHEAD] October 12, 1999 Mr. Steven H. Mikel President & CEO Southern Mineral Corporation 1201 Louisiana Street, Suite 3350 Houston, Texas 77002-5609 RE: Amended and Restated Credit Agreement dated June 19, 1998, by and between Southern Mineral Corporation, SMC Ecuador, Inc., SMC Production Co., BEC Energy, Inc., Amerac Energy Corporation, Compass Bank and First Union National Bank (as subsequently amended, restated, and/or supplemented, the "Credit Agreement") Dear Steve: Section 2.5 (a) of the Credit Agreement shall be amended to change the date of October 15, 1999 to October 22, 1999. Except as expressly provided herein, the Credit Agreement and the other Loan Documents shall remain in full force and effect in accordance with their respective terms and this letter shall not be construed to: (i) impair the validity, perfection or priority of any lien or security interest securing the Obligations; (ii) waive or impair any rights, powers or remedies of the Agent and the Lenders under the Credit Agreement and the other Loan Documents; or (iii) grant any forbearance periods or extend the term of the Credit Agreement or the time for payment of any of the Obligations, except as expressly provided herein. No Event of Default and no Default is waived or remedied by the execution of this letter by the Lenders, and any such Default or Event of Default heretofore arising and currently continuing shall continue after the execution and delivery hereof. Nothing contained in this letter, nor any past indulgence by the Lenders, nor any prior waiver or consents or any waivers or consents which may hereafter be granted nor any other action or inaction on behalf of the Lenders (i) shall constitute or be deemed to constitute a waiver of any Defaults or Events of Default which exist or may exist under the Credit Agreement or any other Loan Document, or (ii) shall constitute or be deemed to constitute an election of remedies by the Lenders or a waiver of any of the rights or remedies of the Lenders provided in the Credit Agreement or the other Loan Documents or otherwise afforded at law or in equity. Mr. Steven H. Mikel October 12, 1999 Page 2 All capitalized terms not otherwise defined herein shall have the same meaning as set forth in the Credit Agreement. As additional consideration for the waiver granted herein by the Lenders, the Borrower and Co-Borrowers hereby release the Agent and the Lenders from any and all known or suspected claims, actions, demands, or causes of action of whatever kind or character arising on or prior to the date hereof. IT IS EXPRESSLY AGREED THAT THE CLAIMS RELEASED BY THE BORROWER AND THE CO-BORROWERS HEREBY INCLUDE THOSE ARISING FROM OR IN ANY MANNER ATTRIBUTABLE TO THE NEGLIGENCE (SOLE, CONCURRENT, ORDINARY, OR OTHER WISE), OF THE AGENT AND THE LENDERS, THEIR RESPECTIVE REPRESENTATIVES, AGENTS, OFFICERS, DIRECTORS, EMPLOYEES, SUCCESSORS AND ASSIGNS. Notwithstanding any provision of this modification or any other Loan Document, this section shall remain in full force and effect and shall survive the delivery and payment of the Notes, this modification and the other Loan Documents and the making, extension, renewal, modification, amendment or restatement of any thereof. THIS LETTER, THE CREDIT AGREEMENT AND THE OTHER WRITTEN LOAN DOCUMENTS REPRESENT, COLLECTIVELY, THE FINAL AGREEMENT BETWEEN THE PARTIES AND MAY NOT BE CONTRADICTED BY EVIDENCE OF PRIOR, CONTEMPORANEOUS, OR SUBSEQUENT ORAL AGREEMENTS OF THE PARTIES. THERE ARE NO UNWRITTEN ORAL AGREEMENTS BETWEEN THE PARTIES. Sincerely, COMPASS BANK By:/s/ Dorothy Marchand Wilson ----------------------------- Dorothy Marchand Wilson Senior Vice President FIRST UNION NATIONAL BANK /s/ Robert R. Wetteroff By: __________________________ Robert R. Wetteroff Senior Vice President Its:__________________________ Mr. Steven H. Mikel October 12, 1999 Page 3 ACKNOWLEDGED AND AGREED: SOUTHERN MINERAL CORPORATION /s/ Steven H. Mikel - ---------------------------- Steven H. Mikel President TYPE: EX-21.1 SEQUENCE: 7 EXHIBIT 21.1 OTHER NAME UNDER WHICH JURISDICTION OF NAME OF SUBSIDIARY SUBSIDIARY CONDUCTS BUSINESS INCORPORATION Neutrino Resources Inc. None Alberta, Canada SMC Production Co. None Texas BEC Energy, Inc. None Texas SMC Ecuador, Inc. None Delaware Amerac Energy Corporation None Delaware Spruce Hills Production Company, Inc. None Delaware [GILBERT LAUSTSEN JUNG ASSOCIATES LTD. LETTER HEAD] LETTER OF CONSENT TO: Southern Mineral Corporation The Securities and Exchange Commission Re: Neutrino Resources Inc. ----------------------- We refer to the following report prepared by Gilbert Laustsen Jung Associates Ltd.: . the Reserve Determination and Evaluation of the Canadian Oil and Gas Properties of Neutrino Resources Inc. effective January 1, 2000, dated January 6, 2000. We hereby consent to the use of our name, reference to and excerpts from the said reports by Southern Mineral Corporation in its annual report and SEC 10 K filing. Yours very truly, GILBERT LAUSTSEN JUNG ASSOCIATES LTD. /s/ Wayne W. Chow -------------------------- Wayne W. Chow, P. Eng. Vice-President Calgary, Alberta Date: March 28, 2000 [CHAPMAN LETTER HEAD APPEARS HERE] March 28, 2000 Neutrino Resources Inc. 1400, 300 - 5th Avenue SW Calgary, Alberta T2P 3C4 Attention: Mr. Al Smith Dear Sir: Re: Neutrino Resources Inc. (the "Company") Consent Letter --------------------------------------- We hereby consent to the use of and reference to our name and material from our report entitled "Neutrino Resources Inc., Reserve and Economic Evaluation Constant Price/No Cost Escalation Case", dated January 6, 2000 and any other associated reports in the Company's annual report and in any required filings with the Securities Exchange Commission (SEC) or any other securities regulatory bodies. Yours very truly, Chapman Petroleum Engineering Ltd. /s/ C. W. Chapman - ------------------------ C. W. Chapman P. Eng. President CWC/hmh/2686 PERMIT TO PRACTICE CHAPMAN PETROLEUM ENGINEERING LTD Signature:/s/ C. W. Chapman -------------------- Date: 3/28/00 ----------------------- PERMIT NUMBER: P 4201 The Association of Professional Engineers, Geologists and Geophysicists of Alberta