Mo. Rev. Stat. § 272.280

If the parties cannot agree as to the part each shall have and keep in repair, either of them may apply to a circuit or associate circuit judge of the county who shall forthwith summon three disinterested householders of the township to appear on the premises, giving three days' notice to each of the parties of the time and place where said viewers shall meet, and the viewers shall, under oath, designate the portion to be kept in repair by each of the parties interested, and notify them in writing of the same.