SDCL § 19-19-301: Presumptions in civil cases.

In all civil actions and proceedings, unless otherwise provided for by statute or by this chapter, a presumption imposes on the party against whom it is directed the burden of going forward with evidence to rebut or meet the presumption, but does not shift to such party the burden of proof in the sense of the risk of nonpersuasion, which remains throughout the trial upon the party on whom it was originally cast. When substantial, credible evidence has been introduced to rebut the presumption, it shall disappear from the action or proceeding, and the jury shall not be instructed thereon.