Idaho Code § 42-3601
Erosion, floodwater, and sediment damages in the watersheds of the rivers and streams of the state of Idaho, causing loss of life and damage to property, constitute a menace to the welfare of the citizens of Idaho; and it is the sense of the legislature of the state of Idaho that the state of Idaho should cooperate with the United States of America, with any political subdivision or public agency in the state of Idaho and with any private person, association, corporation or group of persons, or any agent or agency of any of the foregoing now or hereafter having authority to so cooperate for the purpose of preventing such damages and of furthering the conservation, development, utilization, and disposal of water in Idaho and thereby of preserving and protecting the land and water resources of the state of Idaho.
Idaho Code § 42-3601