<PAGE>
                                                                 Exhibit 10.30
                                 REVOLVING NOTE

$500,000                                                      New York, New York
Note No.1                                                       September 8,2006

     For value received, the undersigned, SNOWFLAKE WHITE MOUNTAIN POWER, LLC,
an Arizona limited liability company, RENEGY, LLC, an Arizona limited liability
company, and RENEGY TRUCKING, LLC, an Arizona limited liability company
(collectively, "Borrowers"). unconditionally jointly and severally promise to
pay to Cobank, ACB ("Lender"), at the office of CoBank, ACB, acting as
administrative agent under the Credit Agreement described below, located at 5500
Quebec Street, Greenwood Village, CO 80111, in lawful money of the United States
of America and in immediately available funds, the principal amount of FIVE
HUNDRED THOUSAND DOLLARS ($500,000), or if less, the aggregate unpaid and
outstanding principal amount of the Revolving Loans advanced by Lender to
Borrowers pursuant to that certain Credit Agreement, dated as of September 1,
2006 (as amended, supplemented or otherwise modified from time to time, the
"Credit Agreement"), by and among Borrowers, CoBank, ACB, as letter of credit
issuer, CoBank, ACB, as lead arranger, administrative agent and collateral
agent, and Lender and other the financial institutions from time to time parties
thereto as lenders (collectively, the "Lenders"), and all other amounts owed by
Borrowers to Lender hereunder.

     This is one of the Revolving Notes referred to in the Credit Agreement and
is entitled to the benefits thereof and is subject to all terms, provisions and
conditions thereof. Capitalized terms used and not defined herein shall have the
meanings set forth in the Credit Agreement.

     This Revolving Note is made in connection with and is secured by, among
other instruments, the provisions of the Collateral Documents. Reference is
hereby made to the Credit Agreement and the Collateral Documents for the
provisions, among others, with respect to the custody and application of the
Collateral, the nature and extent of the security provided thereunder, the
rights, duties and obligations of Borrowers and the rights of the holder of this
Revolving Note.

     The principal amount hereof is payable in accordance with the Credit
Agreement, and such principal amount may be prepaid solely in accordance with
the Credit Agreement.

     Borrowers further agrees to pay, in lawful money of the United States of
America and in immediately available funds, interest from the date hereof on the
unpaid and outstanding principal amount hereof until such unpaid and outstanding
principal amount shall become due and payable (whether at stated maturity, by
acceleration or otherwise) at the rates of interest and at the times set forth
in the Credit Agreement, and Borrowers agree to pay all other fees and costs
owed to Lender under the Credit Agreement at the times specified in, and
otherwise in accordance with, the Credit Agreement.

     If any payment on this Revolving Note becomes due and payable on a date
which is not a Business Day, such payment shall be made on the preceding or next
succeeding Business Day, in either case in accordance with the terms of the
Credit Agreement.

<PAGE>

     Upon the occurrence and during the continuation of any one or more Events
of Default, all amounts then remaining unpaid on this Revolving Note may become
or be declared to be immediately due and payable as provided in the Credit
Agreement and the other Credit Documents. Borrowers hereby expressly waive
notice of default, presentment or demand for payment, protest or notice of
nonpayment or dishonor, or notices or demands of any kind.

     Recourse under this Revolving Note shall be limited as provided in Article
9 of the Credit Agreement.

     Borrowers agree to pay costs and expenses of Lender, including attorneys'
fees, incurred in connection with the interpretation or enforcement of this
Revolving Note, at the times specified in, and otherwise in accordance with, the
Credit Agreement.

            [The Remainder of this Page is Intentionally Left Blank]


                                        2

<PAGE>

     THIS REVOLVING NOTE HAS BEEN EXECUTED AND DELIVERED IN AND SHALL BE
CONSTRUED AND INTERPRETED IN ACCORDANCE WITH AND GOVERNED BY THE LAWS OF THE
STATE OF NEW YORK, WITHOUT REFERENCE TO CONFLICTS OF LAWS (OTHER THAN SECTIONS
5-1401 AND 5-1402 OF THE NEW YORK GENERAL OBLIGATIONS LAW).

                                        SNOWFLAKE WHITE MOUNTAIN POWER, LLC,
                                        an Arizona limited liability company


                                        By: /s/ Robert M. Worsley
                                            ------------------------------------
                                        Name: Robert M. Worsley
                                        Title: Manager


                                        RENEGY, LLC
                                        an Arizona limited liability company


                                        By: /s/ Robert M. Worsley
                                            ------------------------------------
                                        Name: Robert M. Worsley
                                        Title: Manager


                                        RENEGY TRUCKING, LLC
                                        an Arizona limited liability company


                                        By: /s/ Robert M. Worsley
                                            ------------------------------------
                                        Name: Robert M. Worsley
                                        Title: Manager

                        Signature Page to Revolving Note