Lake Managua only in 2009 that a modern wastewater treatment plant (built and operated by the British company Biwater) was opened in Managua, but even it treats only 40% of the city's wastewater. The lake today has no stable outlet, with only occasional floods to Lake Nicaragua through the Tipitapa River. Pollutants are thus concentrated. Despite the pollution, some of the people of Managua still live along the lake's shores and eat the fish. In 2007 the "malecón" area was dredged and the sediment hauled off on barges. A strong odor which permeated the area from the sediment disappeared. A stone rip-rap
Managua Somoza García and his family (1936–1979), the city was rebuilt and began to grow rapidly. New government buildings were erected, industry developed, and universities were established. The city's development caught the attention of Irving Fields and Albert Gamse, who composed a musical piece about the city that became popular in the 1940s through the performances of Freddy Martin, Guy Lombardo and Kay Kyser. Managua had become Central America's most developed city. Today's references differentiate the pre-1970s Managua by labeling it as "La Antigua Ciudad," which in English translates to "The Ancient City" or "The Old City". Managua's progress came to