 By 1920, the Corps of Engineers had dropped the dam idea and instead proposed creating a deep lake on one side of the Anacostia River by linking several of the mid-river islands it had built with dikes.That same year, Congress specifically prohibited the Corps from extending Anacostia Park beyond Benning Bridge, which forced the Corps to drop its plans for a drawbridge.In late 1922, dredging temporarily ceased after funding for continued dredging ran out.