Mo. Rev. Stat. § 60.195
The several county commissions in this state are hereby authorized, in all cases wherein they shall consider it to be the interest of their counties, to obtain from the Missouri department of agriculture a certified copy of so much of the field notes of all surveys lying within their counties, respectively, which have been and may be made by the United States, as relates to the description of the township, section, fractional section, quarter section and legal subdivisional corners, the variation of the needle at which the east and west boundaries of township or range lines were run, the length of the north and south, as well as east and west sectional lines; also, the fallings of all east and west township and sectional lines the same to be filed in the office of the county surveyor of their counties, respectively.
§ 60.195, RSMo