R.I. Gen. Laws § 1-3-4
The airport corporation shall formulate, adopt, and revise, when necessary for planning, an airport airspace plan for each publicly owned airport in the state. Each plan shall indicate the circumstances under which structures and trees are, or would be, airport hazards; the area within which measures for the protection of the airport's navigable airspace, including aerial approaches, should be taken; and what the height limits and other objectives of those measures should be. In adopting or revising any airspace plan, the airport corporation shall consider, among other things, the character of flying operations expected to be conducted at the airport; the traffic pattern and regulations affecting flying operations at the airport; the nature of the terrain; the height of existing structures and trees above the level of the airport; and the possibility of lowering or removing existing obstructions. The airport corporation may obtain and consider the views of the agency of the federal government charged with the fostering of civil aeronautics as to the aerial approaches and other regulated airspace necessary to safe flying operations at the airport.
R.I. Gen. Laws § 1-3-4