The Ohio River Base consisted of the Congress Lands East of Scioto River, and Congress Lands North of Old Seven Ranges. These surveys had vertical rows of six mile square
townships called
Ranges. These ranges were numbered from '''
Ellicott's Line, the boundary between Ohio and Pennsylvania, also known as the Eastern Ohio
Meridian'''. The townships within each range were surveyed north and south from the
baseline called the “Geographer’s Line” at 40 degrees 38 minutes north, which runs west from the north bank of the
Ohio River where it exits Pennsylvania, at a place now called the
Beginning Point of the U.S. Public Land Survey. The townships were not numbered from the baseline, but from south to north beginning with the first partial township in each range formed next to the Ohio River. Thus, townships in adjacent ranges rarely had the same number. This system extended the original numbering plan from the
Seven Ranges. There being no east ranges or south townships, plats are designated “Township X of Range Y of Ohio River Survey” with no need for north or west designations. Surveys on the Ohio River Base also consist of the
Ohio Company and the Seven Ranges. The Seven Ranges were sold in the same manner, and could be considered Congress Lands, but get a special category to itself. ==Congress Lands West of Miami River==