Idaho Code § 42-4402

It is hereby recognized by the legislature that the protection of life and property from the containment of water stored for irrigation, the storage of winter flows and excess waters for irrigation purposes, and flood waters are of great importance to this state. It is therefore declared to be the policy of the state to provide for the storage and containment of irrigation water and the prevention of flood damage in a manner consistent with the conservation and wise development of our water resources and thereby to protect and promote the health, safety and general welfare of the people of this state.