SDCL § 31-21-6: Benefits to landowner as factor in fixing damages--Fixing damages by agreement--Writing and filing agreement--Agreement as conclusive.

In all cases under this chapter the township board of supervisors or board of county commissioners shall estimate the advantage and benefits the laying out and opening of such ditch will confer upon the owner of any land through which such ditch may run, as well as the disadvantages. The damages sustained by reason of laying out and opening such ditch may be ascertained by the agreement of the owner and the township supervisors or county commissioners, in which case every agreement and release shall be in writing and filed in the office of the township clerk or county auditor and shall forever preclude such owner from all further claims for damages.