The machine now rests in Florida's Collier Seminole State Park, near the end of the work it completed in 1928. Two engineers with their crews ran the dredge 18 hours a day. The limestone was broken up by blasting, the project consuming over 2,500,000 sticks of dynamite. The material was moved one yard3 at a time, as that is the capacity of the bucket.
Though by modern standards this is a very "primitive" machine, it is so ingenious in its design and its accomplishment so important to the development of South Florida that the American Society of Mechanical Engineers (ASME) has recognized it for its historic significance.
And How it Walks
This Bay City Walking Dredge, also called the Monegan Walking Dredge, is listed on The National Register of Historic Places.
More on ASME web page.