SEC Form 4

FORM 4		UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934 or Section 30(h) of the Investment Company Act of 1940	OMB APPROVAL OMB Number: 3235-0287 Estimated average burden hours per response: 0.5
	Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

1. Name and Address of Reporting Person* Swank Jerry V (Last) (First) (Middle) 3300 OAK LAWN AVE, SUITE 650 (Street) DALLAS TX 75219 (City) (State) (Zip)	2. Issuer Name and Ticker or Trading Symbol RIO VISTA ENERGY PARTNERS LP [ RVEP ]	5. Relationship of Reporting Person(s) to Issuer (Check all applicable) Director X 10% Owner Officer (give title below) Other (specify below)
	3. Date of Earliest Transaction (Month/Day/Year) 09/01/2006
	4. If Amendment, Date of Original Filed (Month/Day/Year)	6. Individual or Joint/Group Filing (Check Applicable Line) Form filed by One Reporting Person X Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price
Common Units	09/01/2006		P		18,000(1)	A	$5.25	295,918	I	See Footnote(2)

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

1. Name and Address of Reporting Person* Swank Jerry V (Last) (First) (Middle) 3300 OAK LAWN AVE, SUITE 650 (Street) DALLAS TX 75219 (City) (State) (Zip) Relationship of Reporting Person(s) to Issuer Director X 10% Owner Officer (give title below) Other (specify below)

1. Name and Address of Reporting Person* Swank Capital, LLC (Last) (First) (Middle) 3300 OAK LAWN AVE, SUITE 650 (Street) DALLAS TX 75219 (City) (State) (Zip) Relationship of Reporting Person(s) to Issuer Director X 10% Owner Officer (give title below) Other (specify below)

1. Name and Address of Reporting Person* Swank Energy Income Advisors, LP (Last) (First) (Middle) 3300 OAK LAWN AVE, SUITE 650 (Street) DALLAS TX 75219 (City) (State) (Zip) Relationship of Reporting Person(s) to Issuer Director X 10% Owner Officer (give title below) Other (specify below)

Explanation of Responses:

1. The filing of this Form 4 shall not be construed as an admission that Swank Capital, L.L.C. ("Swank Capital"), Swank Energy Income Advisors, L.P. ("Income Advisors") or Jerry V. Swank ("Mr. Swank") are or were for the purposes of Section 16(a) of the Securities Exchange Act of 1934, as amended, the beneficial owners of any of the Common Units owned by The Cushing Fund, L.P. (the "Cushing Fund") or Swank MLP Convergence Fund, LP. (the "Convergence Fund", together with the Cushing Fund, the "Funds"). Pursuant to Rule 16a-1, Swank Capital, Income Advisors, and Mr. Swank disclaim such beneficial ownership.

2. Swank Capital, L.L.C. ("Swank Capital") holds indirectly Common Units of Rio Vista Energy Partners LP through Swank Energy Income Advisors, L.P. ("Income Advisors"), of which Swank Capital is the general partner, which in turn holds 266,049 Common Units through the account of the Cushing Fund, and 29,869 Common Units through the account of the Convergence Fund. Income Advisors serves as the general partner of the Funds. Jerry V. Swank, as the manager of Swank Capital at the time of purchase, controlled the disposition and voting of the Common Units. Swank Capital holds a partnership interest in Income Advisors. Income Advisors receives an allocation of net profits and an asset based fee from and holds a partnership interest in the Funds, which hold the Common Units. Jerry V. Swank, as the Manager of Swank Capital at the time of purchase, controlled the disposition and voting of the Common Units. Mr. Swank holds a limited partner interest in the Funds.

	/s/ Jerry V. Swank	09/06/2006
	Jerry V. Swank, manager of Swank Capital, L.L.C.	09/06/2006
	Jerry V. Swank, manager of Swank Capital, L.L.C., general partner of Swank Energy Income Advisors, L.P.	09/06/2006
	** Signature of Reporting Person	Date
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