Alliance Resource Partners, L.P.

AmeriGas Partners, L.P.

DCP Midstream Partners, L.P.

Energy Transfer Partners, L.P.

Enterprise Products Partners, L.P.

EV Energy Partners, L.P.

Exterran Partners, L.P.

Ferrellgas Partners, L.P.

Genesis Energy, L.P.

Inergy, L.P.

Kinder Morgan Energy Partners, L.P.

MarkWest Energy Partners, L.P.

Martin Midstream Partners, L.P.

Natural Resource Partners, L.P.

Penn Virginia Resource Partners, L.P.

StoneMor Partners, L.P.