Miller and Lux were not any newer to the San Joaquin Valley than had been Haggin, but were the driving influence on valley agribusiness until well into the early 20th century. The corporation had begun acquiring land in the valley in 1858, eventually holding sway over an enormous swath reaching from the Kern River in the south to the Chowchilla River in the north. Much of the land that Miller and Lux acquired was swamp and marsh, which was considered virtually worthless. However, with their huge capital, they could afford to drain thousands of acres of it, beginning an enormous environmental change that eventually resulted in the loss of over 95 percent of the wetlands adjoining the San Joaquin River and Tulare Basin.