In 1814, the Boston and Roxbury Mill Corporation was chartered to construct a milldam, which would also serve as a toll road connecting Boston to Watertown, bypassing Boston Neck. The dam prevented the natural tides from flushing sewage out to sea, creating severe sanitary and odor problems. With costs higher and power lower than expected, in the end, the project was an economic failure, and in 1857 a massive project was begun to "make land" by filling the area enclosed by the dam.