Mo. Rev. Stat. § 245.410
Whenever the right-of-way shall be obtained as provided in section 245.385 over any right-of-way of any railroad, tramway or embankment, either by voluntary relinquishment of the same or by condemnation proceedings, it shall be the duty of such railway company or other person or corporation owning such embankment, to construct its roadbed or other embankment, as high as the top of such levee, without opening between the points connecting such levee and the railroad track, roadbed or other embankments, and in case any such person or corporation shall fail or refuse to so construct its embankment within six months after the building of such adjacent levee, such person or corporation shall be liable in damages for all injuries of every character sustained by such levee district, or any person by reason of its failure to so construct its embankment.
§ 245.410, RSMo