Williston Basin Interstate Pipeline Company provides natural gas transportation, underground storage and gathering services through an interstate pipeline system located in Montana, North Dakota, South Dakota and Wyoming. Williston Basin is an indirect subsidiary of MDU Resources Group, Inc., a multidimensional natural resource enterprise traded on the New York Stock Exchange as “MDU.”

MDU Resources includes natural gas and oil production, construction materials and contracting, electric and natural gas utilities, natural gas pipelines and energy services, and utility services.