Wyoming constitution
Article 13: municipal corporations
Section 5

Municipal corporations shall have the same right as individuals to acquire rights by prior appropriation and otherwise to the use of water for domestic and municipal purposes, and the legislature shall provide by law for the exercise upon the part of incorporated cities, towns and villages of the right of eminent domain for the purpose of acquiring from prior appropriators upon the payment of just compensation, such water as may be necessary for the well being thereof and for domestic uses.