X0303 4 2010-06-22 0 0001364541 EAGLE ROCK ENERGY PARTNERS L P EROC 0001398356 HENDRICKSON STEVEN G EAGLE ROCK ENERGY PARTNERS, L.P. P.O. BOX 2968 HOUSTON TX 77252 0 1 0 0 SVP, Technical Evaluations Common Units Representing Limited Partner Interest 2010-06-22 4 S 0 18500 5.2407 D 120221 D Common Units Representing Limited Partner Interest 2010-06-22 4 X 0 38507 2.50 A 158728 D Subscription Rights 2.50 2010-06-22 4 X 0 38507 0 D 2010-06-01 2010-06-30 Common Units and Warrants 38507 0 D Warrants 6 2010-06-22 4 X 0 38507 2.50 A 2010-08-15 2012-05-15 Common Units 38507 38507 D Represents common units that will be received, after the close of the rights offering, from the exercise of subscription rights. Represents the exercise price of each subscription right entitling the holder to acquire, for $2.50 in cash, (i) one common unit and (ii) one warrant to purchase an additional common unit for $6.00 on the dates specified in Footnote 5. Each Warrant entitles the holder to acquire, for $6.00 in cash, one common unit on the dates specified in Footnote 5. Represents warrants that will be received, after the close of the rights offering, from the exercise of subscription rights. Warrants are only exercisable on each of August 15, 2010, November 15, 2010, March 15, 2011, May 15, 2011, August 15, 2011, November 15, 2011, March 15, 2012 and May 15, 2012. The warrants will be freely tradeable starting on or about July 1, 2010 until May 15, 2012. Represents common units sold by the reporting person to generate proceeds to fund the exercise of 38,507 subscription rights. The reporting person is Senior Vice President, Technical Evaluation of Eagle Rock Energy G&P, LLC the general partner of Eagle Rock Energy GP, L.P. the general partner of registrant. /s/ Charles C. Boettcher, Attorney-In-Fact 2010-06-23