DCP Midstream Partners , LP ( NYSE : DPM ) , is a midstream master limited partnership that gathers , treats , processes , transports and markets natural gas , transports and markets natural gas liquids , and is a leading wholesale distributor of propane . DCP Midstream Partners , LP , is managed by its general partner , DCP Midstream GP , LLC , which is wholly owned by DCP Midstream , LLC , a joint venture between Spectra Energy and ConocoPhillips . For more information , visit the DCP Midstream Partners , LP , Web site at http : / / www.dcppartners.com.