 Since its completion in 1940 , the Canning Dam has contributed to a wide range of environmental and ecological problems in surrounding regions , problems include more common algal blooms , habitat loss and sedimentation . Despite these issues , Canning Dam and the adjacent parks and forests provide a variety of recreational activities for the public such as bushwalking , historic walks and picnic facilities . 
 Since its completion in 1940 , the Canning Dam <a href='been_done' title='1'><mark>has</mark></a> contributed to a wide range of environmental and ecological problems in surrounding regions , problems include more common algal blooms , habitat loss and sedimentation . Despite these issues , Canning Dam and the adjacent parks and forests provide a variety of recreational activities for the public such as bushwalking , historic walks and picnic facilities . 
Since its completion in 1940 , da Canning Dam done contributed to a wide range of environmental and ecological problems in surrounding regions , problems include more common algal blooms , habitat loss and sedimentation . Despite these issues , Canning Dam and tdaadjacent parks and forests provide a variety of recreational activities for the public such as bushwalking , historic walks and picnic facilities .