Crestwood Equity Partners LP is a holding and master limited partnership (MLP) company. The Company develops, acquires, owns or controls, and operates assets and operations within the energy midstream sector. Its segments include gathering and processing (G&P), which includes its natural gas, crude oil and produced water G&P operations; storage and transportation, which includes its natural gas and crude oil storage and transportation operations, and marketing, supply and logistics, which includes its natural gas liquid (NGL) supply and logistics business, crude oil storage and rail loading facilities and fleet, and salt production business. It provides infrastructure solutions to service natural gas and crude oil shale plays across the United States. It owns and operates a portfolio of crude oil and natural gas gathering, processing, storage and transportation assets. The Company's operating assets are owned by or through its subsidiary, Crestwood Midstream Partners LP.