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* Eagle Rock Holdings, L.P. (Last) (First) (Middle) 1415 LOUISIANA STREET, SUITE 2700 (Street) HOUSTON TX 77002 (City) (State) (Zip)	2. Issuer Name and Ticker or Trading Symbol EAGLE ROCK ENERGY PARTNERS L P [ EROC ]	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) 07/30/2010
	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 representing limited partner interests	07/30/2010		P		1,000,000(1)	A	(2)	20,083,324	D(1)(3)(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* Eagle Rock Holdings, L.P. (Last) (First) (Middle) 1415 LOUISIANA STREET, SUITE 2700 (Street) HOUSTON TX 77002 (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* Eagle Rock GP, LLC (Last) (First) (Middle) 1415 LOUISIANA STREET, SUITE 2700 (Street) HOUSTON TX 77002 (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* Montierra Minerals & Production, L.P. (Last) (First) (Middle) 24 GREENWAY PLAZA, SUITE 450 (Street) HOUSTON TX 77046 (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* Montierra Management LLC (Last) (First) (Middle) 24 GREENWAY PLAZA, SUITE 450 (Street) HOUSTON TX 77046 (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* Natural Gas Partners VII, L.P. (Last) (First) (Middle) 125 E. JOHN CARPENTER FREEWAY, SUITE 600 (Street) IRVING TX 75062 (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* Natural Gas Partners VIII, L.P. (Last) (First) (Middle) 125 E. JOHN CARPENTER FREEWAY, SUITE 600 (Street) IRVING TX 75062 (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* NGP Income Management, L.L.C. (Last) (First) (Middle) 125 E. JOHN CARPENTER FREEWAY, SUITE 600 (Street) IRVING TX 75062 (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. On July 30, 2010, Eagle Rock Energy Partners, L.P. (the "Issuer") issued 1,000,000 common units to Eagle Rock Holdings, L.P. ("Holdings") as consideration for the Issuer's exercise of the option to acquire all of the membership interests in Eagle Rock Energy G&P, LLC and all of the limited partner interests in Eagle Rock Energy GP, L.P. from Holdings (collectively, the "Interests"), as described in the Amended and Restated Securities Purchase and Global Transaction Agreement dated January 12, 2010 (the "Agreement").

2. In accordance with the Agreement, Holdings acquired 1,000,000 common units in exchange for the Interests, which have a market value equal to the closing price of the common units on July 30, 2010, the date the common units were acquired by Holdings.

3. Natural Gas Partners VII, L.P. ("NGP VII") and Natural Gas Partners VIII, L.P. collectively own a majority of the LP interest in Holdings and control the general partner of Holdings. NGP VII owns a majority of the LP interest in Montierra Minerals & Production, L.P. ("Montierra Minerals") and controls the general partner of Montierra Minerals. NGP VII is the sole member of NGP Income Management, L.L.C.

4. Kenneth A. Hersh may be deemed to share dispositive power over the units held by NGP VII, thus, he may also be deemed to be the beneficial owner of these units. This report is filed in connection with the Form 4 filed today by Kenneth A. Hersh.

5. The reporting persons disclaim beneficial ownership of the reported securities except to the extent of their pecuniary interests therein, and this report shall not be deemed an admission that the reporting persons are the beneficial owners of the reported securities for purposes of Section 16 or for any other purpose.

	Eagle Rock Holdings, L.P., By its general partner, Eagle Rock GP, L.L.C., By /s/ Kenneth A. Hersh, Manager	07/30/2010
	Eagle Rock GP, L.L.C., By /s/ Kenneth A. Hersh, Manager	07/30/2010
	Montierra Minerals & Production, L.P., By its general partner, Montierra Management LLC, By /s/ Joseph A. Mills, Chief Executive Officer	07/30/2010
	Montierra Management LLC, By /s/ Joseph A. Mills, Chief Executive Officer	07/30/2010
	Natural Gas Partners VII, L.P., By its general partner, G.F.W. Energy VII, L.P., By its general partner, GFW VII, L.L.C., By /s/ Kenneth A. Hersh, Authorized Member	07/30/2010
	Natural Gas Partners VIII, L.P., By its general partner, G.F.W. Energy VIII, L.P., By its general partner, GFW VIII, L.L.C., By /s/ Kenneth A. Hersh, Authorized Member	07/30/2010
	NGP Income Management, L.L.C., By /s/ Tony R. Weber, President	07/30/2010
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
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