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) 12/11/2006
	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	12/18/2006		P		266,049(3)	D	$4.42	0(3)	I	See Footnote(1)(4)(5)
Common Units	12/18/2006		P		266,049(2)	A	$4.42	405,486(2)	I	See Footnote(1)(4)(5)

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)

1. Name and Address of Reporting Person* Cushing Fund, 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)

1. Name and Address of Reporting Person* Cushing MLP Opportunity Fund I, 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"), The Cushing Fund, LP ("Cushing Fund"), The Cushing MLP Opportunity Fund I, LP ("Opportunity Fund") or Jerry V. Swank ("Mr. Swank") is or was for the purposes of Section 16(a) of the Securities Exchange Act of 1934, as amended, the beneficial owner of any of the common units of Rio Vista Energy Partners LP ("Common Units") held by Swank MLP Convergence Fund, LP ("Convergence Fund"), Cushing Fund, Opportunity Fund or in the total return equity swap agreement entered into by The Cushing Fund (Offshore), Ltd. ("Cushing Offshore"). Pursuant to Rule 16a-1, Swank Capital, Income Advisors, Cushing Fund, Opportunity Fund and Mr. Swank disclaim such beneficial ownership.

2. Swank Capital holds indirectly 405,486 Common Units through Income Advisors, of which Swank Capital is the general partner, which in turn holds Common Units through the account of Opportunity Fund. Income Advisors serves as the controlling member of the entity that controls the general partner and investment manager of Opportunity Fund. The general partner and investment manager of Opportunity Fund receive an allocation of net profits and an asset based fee, respectively. Jerry V. Swank serves as the manager of Swank Capital.

3. Swank Capital holds indirectly 0 Common Units through Income Advisors, of which Swank Capital is the general partner, which in turn holds Common Units through the account of Cushing Fund. Income Advisors serves as the general partner of Cushing Fund. Jerry V. Swank, as the manager of Swank Capital at the time of the reported transaction, 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 Cushing Fund, 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 Cushing Fund.

4. Swank Capital holds indirectly 30,768 Common Units through Income Advisors, of which Swank Capital is the general partner, which in turn holds Common Units through the account of Convergence Fund. Income Advisors serves as the general partner of Convergence Fund. Jerry V. Swank, as the manager of Swank Capital, controls 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 Convergence Fund, which hold the Common Units. Jerry V. Swank, as the Manager of Swank Capital at the time of purchase, controlled the dispostion and voting of the Common Units. Mr. Swank holds a limited partner interest in Convergence Fund.

5. Cushing Offshore is party to a total return equity swap agreement with respect to 49,748 shares of Common Units. Income Advisors is the investment manager of Cushing Offshore and receives an allocation of net profits and an asset based fee from Cushing Offshore. Swank Capital is the general partner of Income Advisors and owns a limited partner interest in Income Advisors. Mr. Swank is the manager of Swank Capital, and, in addition, owns shares of Cushing Offshore.

	/s/ Jerry V. Swank	12/19/2006
	Jerry V. Swank, manager of Swank Capital, L.L.C.	12/19/2006
	Jerry V. Swank, manager of Swank Capital, L.L.C., general partner of Swank Energy Income Advisors, L.P.	12/19/2006
	Jerry V. Swank, manager of Swank Capital, L.L.C., general partner of Swank Energy Income Advisors, L.P., general partner of The Cushing Fund, LP	12/19/2006
	Jerry V. Swank, manager of Swank Capital, L.L.C., general partner of Swank Energy Income Advisors, L.P., member of Carbon County GP I, LLC, general partner of Carbon County Partners I, L.P., general partner of The Cushing MLP Opportunity Fund I, LP	12/19/2006
	** Signature of Reporting Person	Date
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* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
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