Minn. Stat. § 389.02

The county surveyor may appoint deputies as the county surveyor deems necessary, and is responsible for the faithful and correct performance of their duties. The county surveyor shall (1) make all surveys within the county ordered by any court, public board, or officer, (2) keep a fair and correct record of each survey made by the office, in a file to be provided by the county board, to be turned over to a successor in office, and (3) assign each survey a unique number and preserve a copy of the field notes, which shall be complete and accurate, and calculations of each survey, with its number properly endorsed thereon. The surveyor must furnish to any person requesting it a copy of the field notes, calculations and survey number.