R.I. Gen. Laws § 45-32-25: Property devoted to other public use.

If any of the real property, estate, or interest in it, included within the project area is devoted to a public use, it may nevertheless be acquired, and the taking shall be effective; provided, that no real property or estate or interest in it belonging to a city or town or to the state government shall be acquired without its consent, and that no real property or estate or interest in it belonging to a public utility may be acquired without the approval of the division of public utilities or other officer or tribunal having regulatory power over the utility. Any real property or estate, or interest in it, already owned or acquired by the agency may nevertheless be included within the taking for the purpose of acquiring any outstanding interest in the real property.