N.D. Cent. Code § 40-34-15
If it is deemed expedient for the safety and health of the people, municipalities of this state may enter into agreements with each other, or jointly or severally with governmental agencies or municipalities outside the state, to erect and maintain intercepting sewers and sewage treatment plants, or may enter into contracts with governmental agencies or municipalities outside the state to furnish to such extraterritorial agencies or municipalities sewage disposal for such compensation and upon such terms and conditions as the parties under such agreement may stipulate. Whenever it shall be convenient or necessary as determined by a majority vote of the governing body or the respective governing bodies of such governmental agencies or municipalities, they may acquire, purchase, own, or maintain lands and personal property within or without this state and may improve the same and erect structures thereon, including dams and damsites. If the governing body of a municipality or the respective governing bodies of municipalities shall determine to do so by a resolution adopted by a majority vote thereof, such municipalities may erect dams upon streams, watercourses, or other bodies of water located within or without this state, or constituting in whole or in part the boundary waters of this state, and may alter or improve the bed, banks, or courses of such streams, watercourses, or bodies of water. In the enjoyment of such power, municipalities may purchase and hold property within and without this state and, subject to chapter 32-15, may exercise the right of eminent domain as provided by the laws of this state, and may enter into contracts and engagements with persons, firms, corporations, limited liability companies, or with municipalities or governmental agencies located without this state for like purposes.
N.D.C.C. § 40-34-15