It consisted of 25 square miles (65 km2) within the exterior boundaries of the Reserve. Within the Reserve were the villages of Upper Tawa Town and the Lower Tawa Town. Lower Tawa Town, present-day Ottawa, Ohio, is reported to be the last Ottawa reservation active in Ohio. The area of the reserve was part of the Great Black Swamp, and was not generally settled by whites until after the Civil War. The Reserve was ceded and dissolved under the 1831 Treaty of Miami Bay of Lake Erie (7 Stat.359). In 1898, Charles Royce in Eighteenth Annual Report enumerated the Blanchard's Fork Reserve as Tract 167.