In 1916, the completion of the Lake Washington Ship Canal re-plumbed Lake Washington’s path to the Puget Sound. The Lake’s elevation dropped 9 feet, and its 770 square mile watershed was taken from the Duwamish and (now extinct) Black Rivers. Collateral damage included reduction of the Lake’s acreage of wetland and slough from 1,000 to 74; reduction of its mileage of shoreline from 82 to 72; lost habitats for plants, mammals, birds and fish (already fighting migratory re-routing). Additional landfills, reclamations, dredging, and routing of streams to city sewers completed the transformation. The Lake was spared the plans of some to significantly industrialize its waterfront, and while 78 percent of its perimeter has been devoted to residential land use, small portions have kept intact the old-growth forest that once covered its banks.