Conn. Gen. Stat. § 26-138: Draining for taking fish.

No person, firm, corporation or municipality or political subdivision thereof shall intentionally drain the water from any stream, lake, pond, reservoir or other impoundment for the purpose of taking fish therefrom or shall so drain such water for any other purpose to the point where the life of fish therein is endangered unless notice has been given to the commissioner at least forty-eight hours before such draining commences and in each such case representatives of the department shall be permitted to enter upon such property to determine whether the removal or salvage of fish would be necessary, and to carry out such operations.