Changing water levels occasionally expose the reservoir banks, which become a popular feeding ground for small wading birds, including common sandpipers, green sandpipers and little ringed plovers.
Environmental groups strongly opposed construction because the bay was an important feeding ground for birds, which would be lost following impoundment.
Some creatures have benefited - golf courses provide perfect browse for kangaroos and a landfill site is an important feeding ground for ibises but many have suffered.