this lake system has been greatly impacted from human activities. it has been extensively modified and reduced in size by dredge and fill activities from urban and residential development; several lakes were completely filled and built upon. the lakes were probably dredged contemporaneous with canal construction in the 1920s or earlier. it is likely that filling of the adjacent wetlands for residential construction occurred at the same time or later. square lake and its oxbow lake were dredged for fill in the 1960s and additional dredging occurred in the north lobe of lake osborne in the 1970s.