After the Civil War, a state agency called the Internal Improvement Fund (IIF), whose purpose was to improve Florida's roads, canals, and rail lines, was discovered to be deeply in debt. The IIF found a Pennsylvania real estate developer named Hamilton Disston interested in implementing plans to drain the land for agriculture. Disston purchased 4,000,000 acres (16,000 km2) of land for $1 million in 1881,[107] and he began constructing canals near St. Cloud. At first, the canals seemed to work in lowering the water levels in the wetlands surrounding the rivers.[108] They were effective in lowering the groundwater, but it became apparent that their capacity was insufficient for the wet season.[109] Although Disston's canals did not drain well, his purchase primed the economy of Florida. It made news and attracted tourists and land buyers. Within four years property values doubled, and the population increased significantly.[107]