Document:

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                                EXHIBIT 10.18(b)

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                              THROUGHPUT AGREEMENT

       This Throughput Agreement is being executed and entered into by Tengasco
Pipeline Corporation ("TPC"), and Charles F. Smithers, Jr. ("Smithers") this
16 day of August, 2000.

       Pursuant to that certain Loan Agreement between TPC and Smithers dated as
of August 16, 2000, and related documents as the same may be amended from time
to time ("Loan Agreement"), Smithers and other similarly situated persons are
making available to TPC, a wholly owned subsidiary of Tengasco, Inc., a loan in
the aggregate principal amount of 5.6 million dollars, a portion of which is
being loaned by Smithers and that portion being referred to herein as the
"Loan," to provide financing for the construction of TPC's Swan Creek-Kingsport
natural gas pipeline ("Pipeline"). As an additional consideration for Smithers's
agreement to make the Loan to TPC, TPC has agreed that Smithers shall be
entitled to participate in the revenue associated with the operation of the
Pipeline to the extent described in this Agreement.

       NOW, THEREFORE, in consideration of the premises, and for other good and
valuable consideration, the receipt and sufficiency of which are acknowledged
hereby, TPC agrees as follows:

       Throughput Revenue Participation. Effective as of the commencement of
operations by the Pipeline, and each month thereafter until the Loan is paid in
full, TPC shall be liable for the payment to Smithers of Smithers's Proportional
Part of a total Throughput Fee of ten cents ($0.10) per MMBtu of natural gas
delivered through the Pipeline. The Proportional Part of the total ten-cent
Throughput Fee that Smithers is entitled to receive under this Agreement is that
portion of the ten-cent fee equal to the ratio of the Loan being made by
Smithers to the total of all amounts loaned to TPC for this pipeline financing,
currently $5.6 million. The volumes delivered through the Pipeline shall be
determined on a monthly basis and shall equal the sum of all volumes delivered
at delivery points on the pipeline, net of line losses and fuel.

       Default. In the event of any failure by TPC to perform, or cause the
performance of, any of its obligations under this Agreement, in addition to any
and all other remedies available to Smithers under this Agreement, the failure
will constitute an Event of Default under the Loan Agreement.

       Enforcement Action. In the event Smithers is required to take legal
action against TPC to enforce their right to any payments due under this
Agreement or to enforce the performance by TPC of any other obligations under
this Agreement, Smithers shall be entitled to recover from TPC all of the costs
and expenses of such legal action including without limitation attorneys fees
and court costs.

       Term. Unless earlier terminated by Smithers in its sole discretion, this
Agreement shall continue in full force and effect for so long as the Loan
remains unpaid. When at any time the Loan is paid, this Agreement shall
terminate without any further action by TPC or by Smithers and Smithers shall
release all liens upon the Pipeline in accordance with the Loan Agreement.

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       Notices and Payments. Unless changed by written notice, all payments,
volume information, notices or other communications to Smithers shall be sent to
the following address:

             Charles F. Smithers, Jr.
             200 Park Avenue, 11th Floor
             New York, NY 10166-0003

             Miscellaneous.

       (a) Successors. The provisions of this Agreement shall be binding upon
       and shall inure to the benefit of the parties hereto and their respective
       legal representatives, successors, and assigns. Smithers may not assign
       this Agreement without written consent of TPC, which consent may not be
       unreasonably withheld.

       (b) Rights Cumulative; No Waiver. The rights granted Smithers under this
       Agreement or the Loan Agreement or allowed by law or equity shall be
       cumulative and may be exercised at any time and from time to time. No
       failure on the part of Smithers to exercise, and no delay in exercising,
       any right shall be construed or deemed to be a waiver thereof, nor shall
       any single or partial exercise by Smithers of any right preclude any
       other future exercise thereof or the exercise of any other right.

       (c) Severance. If any provision of this Agreement or any application of
       any provision shall have been declared invalid, illegal or unenforceable
       by any court or agency of competent jurisdiction, such declaration shall
       not affect or impair the validity, legality and enforceability of any
       other provisions of this Agreement or of the Loan Agreement or any other
       application of such provisions.

       (d) Amendment. This Agreement may not be amended, modified or changed,
       nor shall any waiver of any provision hereof be effective, except by an
       instrument in writing signed by the party against whom enforcement of the
       amendment, modification, change, or waiver is sought.

       (e) Choice of Law. This Agreement shall be governed by and construed in
       accordance with the laws of the State of Tennessee.

       (f) Interpretation. All terms not otherwise defined in this Agreement
       shall have the meanings ascribed to them in the Loan Agreement.

       (g) Counterparts. This document may be executed in counterparts, all of
       which executed counterparts shall together constitute a single document.
       Signature and acknowledgment pages may be detached from the counterparts
       and attached to a single copy of this document to physically form one
       document.

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      IN WITNESS WHEREOF, Smithers and TPC have executed this agreement as of
the day and year first above written.

                                     TENGASCO PIPELINE CORPORATION

                                     BY: /s/ Robert M. Carter
                                        --------------------------------------
                                           Robert M. Carter, President

                                         /s/ Charles F. Smithers, Jr.
                                        --------------------------------------
                                           Charles F. Smithers, Jr.

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                                 EXHIBIT 10.19

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                                 LOAN AGREEMENT

       LOAN AGREEMENT, dated August 16, 2000 between Tengasco Pipeline
Corporation, a Tennessee corporation, ("Borrower"), and Nick Nishiwaki
("Lender").

                                   WITNESSETH:

       WHEREAS, the Borrower has requested that the Lender make the loan (as
hereinafter defined) and the Lender has agreed to make the Loan on and subject
to the terms and conditions hereof;

       NOW, THEREFORE, each of the parties hereto, for good and valuable
consideration, the receipt and sufficiency of which is hereby acknowledged,
hereby agree as follows:

                                   AGREEMENT:

1.     Subject to the terms and conditions hereof, the Lender hereby agrees to
       make a loan (the "Loan") to the Borrower in the amount of $2,000,000 to
       be made available as follows: $300,000 on August 16, 2000 and the
       remainder to be made available as follows: $1.7 million on September 7,
       2000.

2.     The Borrower hereby unconditionally promises to pay to the Lender the
       full outstanding principal amount of the Loan, together with all unpaid
       interest thereon and all other outstanding unpaid amounts owing to the
       Lender under or in connection with the Loan Documents, on or before
       August 16, 2005. The Borrower hereby agrees to pay interest on the unpaid
       principal amount of the Loan at the rate of 10.75% payable monthly with
       the first payment due on March 16, 2001. The Loan shall be evidenced by a
       Note in the form attached hereto.

3.     As part consideration for making the Loan, Borrower will pay Lender a
       throughput fee in accordance with the form of Throughput Agreement
       attached hereto, while the Loan is outstanding.

4.     The principal of the Note may be prepaid, in whole or in part, at any
       time.

5.     If all or a portion of any interest payment shall not be paid when due,
       such overdue amount shall, to the fullest extent permitted by law, bear
       interest at a rate of 10.75% per annum.

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6.     All payments to be made by the Borrower to the Lender at the following
       address:

                         50 E. Hartsdale Avenue, #8F
                         Hartsdale, NY 10530

       or such other address as the Lender may from time to time designate.

7.     The Loan is secured by a first lien upon all the pipeline properties,
       rights of way, and facilities owned by Borrower and to be constructed
       with the proceeds of the Loan.

8.     In the event the Borrower fails to pay any principal of or interest on
       the Loan when due and payment, or application is made by the Borrower for
       the appointment of a receiver, trustee or custodian for any of the
       Borrower's assets; or a petition under any section or chapter of the
       federal Bankruptcy Code or any similar law shall be filed by the
       Borrower; or the Borrower makes an assignment for the benefit of its
       creditors or any case or proceeding is filed by the Borrower for its
       dissolution, liquidation or termination and the Borrower shall fail to
       sure such default within ten (10) days of the receipt of written notice
       from the Lender, the balance due under the Note may, at the option of the
       Lender be declared, and immediately shall become, due and payable.

9.     The Borrower agrees unconditionally upon demand to pay or reimburse the
       Lender for ail reasonable out-of-pocket costs, expenses and
       disbursements, including but not limited to fees and expenses of counsel,
       incurred by Lender in connection with the enforcement of this Agreement.

10.    No course of dealing and no delay or failure of the Lender in exercising
       any right, power, remedy or privilege under this Agreement shall affect
       any other or future exercise thereof or operate as a waiver thereof.

11.    This Agreement and the other Loan Documents shall be binding upon and
       inure to the benefit of the successors and assigns of the Borrower and
       the Lender.

12.    Except as otherwise expressly provided for in this Agreement, the
       Borrower waives presentment, demand and protest and notice of
       presentment, protest, default, nonpayment, maturity, release, compromise,
       settlement, extension or renewal of any and all commercial paper,
       accounts, contract rights, documents, instruments, chattel paper and
       guarantees at any time held by the Lender on which the Borrower may in
       any way be liable and hereby ratifies and confirms whatever the Lender
       may do in this regard; and (ii) the benefit of all valuation,
       appraisement and exemption laws.

13.    Except as otherwise provided herein, any notice or other written
       communication required hereunder shall be in writing, and shall be deemed
       to have been validly served, given or delivered (i) upon deposit in the
       United States mail, with proper

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       postage prepaid, (ii) by hand delivery, (iii) by overnight express mail
       courier, or (iv) by telecopier, and addressed to the party to be notified
       at the address set forth below or to such other address as each party may
       designate for itself in writing by like notice.

             To the Lender:

                   50 E. Hartsdale Avenue, #8F
                   Hartsdale, NY 10530

       To the Borrower:

                   Tengasco Pipeline Corporation
                   603 Main Avenue, Suite 500
                   Knoxville, TN 37902
                   Facsimile: (865) 523-9894

14.    This Agreement represents the entire agreement between the parties and
       may not be amended, modified or changed, except by a writing executed by
       both parties.

15.    This Agreement may be executed in counterparts.

       IN WITNESS WHEREOF, and intending to be legally bound hereby, this
 Agreement has been duly signed, sealed and delivered by the undersigned as of
 the day and year specified at the beginning hereof.

ATTEST:                              BORROWER
                                     TENGASCO PIPELINE CORPORATION

/s/ Elizabeth A. Wendelken           By: /s/ Robert M. Carter
---------------------------------       --------------------------------------
Elizabeth A. Wendelken, Secretary          Robert M. Carter, President

                                     LENDER

                                     /s/ Nick Nishiwaki
                                     -----------------------------------------
                                     Nick Nishiwaki

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