The replat of a platted subdivision extinguishes the rights in the public and the public easements and rights-of-way created in the original plat as set forth in the replat or to the extent they are inconsistent with the replat. Any private easements shown on a plat cannot be extinguished without joinder of the parties benefitted by the private easement.
SDCL app TO CHAPTER 43-30 § 19-09