Exhibit 10.4

OMNIBUS AMENDMENT

                        This OMNIBUS AMENDMENT (this “ Amendment ”) to the TECO
Guaranties (as defined below), dated as of October 31, 2001, by and among TECO
Energy, Inc. (“ Guarantor ”) and Administrative Agent (as defined below).

W I T N E S S E T H:

                        WHEREAS, Union Power Partners, L.P., a Delaware limited
partnership (“ El Dorado Borrower ”), Citibank, N.A., as administrative agent
(in such capacity, “ El Dorado Administrative Agent ”), Societe Generale, as LC
Bank (“ LC Bank ”) and the other financial institutions named therein (the “
Banks ”) have entered into that certain Union Power Project Credit Agreement,
dated as of May 31, 2001 (the “ Credit Agreement ”), pursuant to which the Banks
agreed to make certain advances of credit to El Dorado Borrower in the amounts
specified and on the terms and subject to the conditions set forth therein;

                        WHEREAS, El Dorado Borrower, Citibank, N.A., as
administrative agent (in such capacity, “ El Dorado Bridge Administrative Agent
” and, together with El Dorado Administrative Agent, “ Administrative Agent ”),
and the other financial institutions named therein (the “ Bridge Banks ”) have
entered into that certain Union Power Project Bridge Loan Agreement, dated as of
May 31, 2001 (the “ Bridge Loan Agreement ”), pursuant to which the Bridge Banks
agreed to make certain advances of credit to El Dorado Borrower in the amounts
specified and on the terms and subject to the conditions set forth therein;

                        WHEREAS, Guarantor has entered into that certain Equity
Bridge Guaranty, dated as of May 31, 2001 (the “ Equity Bridge Guaranty ”), in
favor of El Dorado Bridge Administrative Agent, pursuant to which Guarantor
guaranteed the obligations of El Dorado Borrower under the Bridge Loan
Agreement;

                        WHEREAS, Guarantor has entered into that certain Equity
Contribution Guaranty, dated as of May 31, 2001 (the “ Equity Contribution
Guaranty ” and, together with the “Equity Bridge Guaranty”, the “ TECO
Guaranties ”), in favor of El Dorado Administrative Agent, pursuant to which
Guarantor guaranteed the equity contribution obligations of the partners of El
Dorado Borrower under that certain Equity Contribution Agreement (as defined in
the Credit Agreement); and

                        WHEREAS, Guarantor has requested that the definition of
the term “Contingent Obligation” and Section 4.3(b) of each TECO Guaranty be
modified as set forth herein to clarify that a structured finance transaction
being contemplated by Guarantor does not trigger certain covenants of Guarantor
set forth in such TECO Guaranties.

AGREEMENT

                        NOW THEREFORE, in consideration of the premises and
mutual agreements herein contained and for other good and valuable
consideration, the receipt and sufficiency of

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which are hereby acknowledged, the parties hereto, intending to be legally
bound, agree to amend the TECO Guaranties as follows:

                        Section 1.    Definitions and Interpretation .
Capitalized terms used herein and not otherwise defined herein shall have the
meanings set forth in the TECO Guaranties.

                        Section 2.    Amendments to TECO Guaranties .

                        2.1    Definition of Contingent Obligation . The
definition of the term “Contingent Obligation” in each of the TECO Guaranties is
hereby amended by deleting the last sentence of such definition and adding in
lieu thereof:

> > “The amount of any Contingent Obligation shall be deemed to be the maximum
> > probable liability in respect thereof (assuming such Person is required to
> > perform thereunder) as determined in good faith by Guarantor”.

                        2.2    Section 4.3(b) . Section 4.3(b) of each TECO
Guaranty is hereby amended by deleting the word “its” in the fourth line thereof
and adding in lieu thereof the phrase “any Significant Subsidiary’s”.

                        Section 3.    Miscellaneous .

                        3.1    Execution and Effectiveness of this Amendment .
This Amendment, once executed, shall be construed as an omnibus amendment to the
TECO Guaranties. This Amendment shall be effective as of the date hereof upon
the execution and delivery of this Amendment by the parties hereto.

                        3.2    Headings . Headings herein are for convenience
only and shall not be relied upon in interpreting or enforcing this Amendment.

                        3.3    Counterparts . This Amendment may be executed in
any number of counterparts and by the different parties hereto on separate
counterparts, each of which when so executed and delivered shall be an original,
but all of which shall together constitute one and the same instrument.

                        3.4    Severability . Any provision of this Amendment
held to be invalid, illegal or unenforceable in any jurisdiction shall, as to
such jurisdiction, be ineffective to the extent of such invalidity, illegality
or unenforceability without affecting the validity, legality and enforceability
of the remaining provisions hereof; and the invalidity of a particular provision
in a particular jurisdiction shall not invalidate such provision in any other
jurisdiction.

                        3.5    Governing Law . This Amendment shall be governed
by, and construed in accordance with, the law of the State of New York.

                        3.6    No Other Amendments . This Amendment is made in
amendment and modification of, but not extinguishment of, the obligations of
Guarantor set forth in the TECO Guaranties, and, except as specifically modified
pursuant to the terms of this Amendment, the terms and conditions of the TECO
Guaranties hall remain in full force and effect. Nothing

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herein shall limit in any way the rights and remedies of the parties hereto
under the TECO Guaranties. Except as otherwise expressly provided herein, the
execution, delivery and performance by the parties hereto of this Amendment
shall not constitute a waiver, forbearance or other indulgence with respect to
any of the TECO Guaranties amended hereby.

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