AmeriGas Partners, L.P.

Energy Transfer Partners, L.P.

Enterprise Products Partners L.P.

Exterran Partners, L.P.

Ferrellgas Partners, L.P.

Linn Energy, LLC

Magellan Midstream Partners, L.P.

Natural Resource Partners L.P.

NuStar Energy L.P.

ONEOK Partners, L.P.

Plains All American Pipeline, L.P.

TC PipeLines, LP.