NGL Energy Partners announced in December that it had closed an agreement to sell five disposal wells serving the Bakken to an affiliate of Tallgrass Energy for $91 million in cash.

The sale, first announced in November, was reported to include five saltwater disposal wells in McKenzie and Dunn Counties, N.D. The company said it decided to end saltwater disposal operations where it does not have a dominant position in order to increase focus on the Permian Basin.

According to Mike Krimbill, NGL Energy CEO, the sale reduces company’s bank leverage as part of its “shift to a self-funding model and a continued focus on balance sheet strength and financial flexibility.”

For Tallgrass Energy, the addition of five disposal wells in North Dakota expands the company’s presence in the Bakken, said David G. Dahaemers Jr., president and CEO.“This acquisition further expands our position as a leading provider of midstream water solutions in five of the nation’s most rapidly growing production regions.”

The five Bakken disposal facilities were part of NGL’s asset base of 84 water treatment and disposal facilities in seven basins. Of the remaining 116 disposal wells in its portfolio, 41 are in the Permian, 24 in the Eagle Ford, 12 in the DJ, two in the Granite Wash, one in the Pinedale Anticline and one in the Eaglebine. As of August, NGL Energy claimed a combined disposal capacity of approximately 3 MM BWPD.