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Township and Range:
The Bureau of Land Management (BLM) established survey meridians and base lines that were the starting points for each region of townships. Originally surveyors named the earliest pairs by number (the first through sixth principal meridians); the rest are named for geographic features.
A township is both a square six miles long on each side as well as the method to locate the north-south (horizontal) row from the base line where the township lies. In the graphic below, the township is located at Township 1 North because it is in the first row north of the base line. Ranges are rows of townships east or west of the meridian (vertical). In the graphic, the township is located at Range 1 East because it is in the first row to the east of the principal meridian.
Within each township are 36 sections, each one-mile square. Each section contains 640 acres. The sections are numbered from 1 to 36 in the following order:
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