Relating to the registration of reservoirs within the Big Butte Creek drainage area.

Allows owner of reservoir located on specified property within Big Butte Creek drainage area to register reservoir with Water Resources Department. Establishes application and qualification deadlines. Exempts registered reservoir from water right permit and water right certificate requirements. Prohibits diversion or other uses, except for suppressing or extinguishing fire, of reservoir water. Makes reservoir use subservient to water rights. Requires property owner to measure and report flows into and out of reservoir. Requires department to order removal of reservoir if not registered. Requires department to cancel registration and order removal of reservoir if reservoir ceases to meet requirements.