In 1931, the LADWP made the decision to permanently keep the Hollywood Reservoir lowered, and keep it to no more than 4,000 acre-feet (4,900,000 m3).
In 1931, the LADWP made the decision to keep the Hollywood Reservoir's water level permanently low, ensuring it does not exceed 4,000 acre-feet (4,900,000 m³) of water.