When the Rio Tinto mining company decided to increase its output of iron ore by 25% in its Marandoo location, it had to deal with an unexpected problem: an excess of water in the deep reaches of the mine. Because freshwater is a scarce resource in this region of Australia, Rio Tinto's challenge was to come up with a comprehensive water strategy for the region. This case is used in Darden's "Economics of Water" course elective.