Kan. Stat. § 13-1016
Any person through whose lands such flushing-ditch or conduit, discharging-sewer or outlet may be constructed, or who would be otherwise damaged, may give consent thereto in writing, and such writing, with formal acknowledgment, may be recorded in the office of the register of deeds of the proper county, and thenceforth the city shall have the same right to construct and maintain such flushing-ditch or conduit, discharging-sewer or outlet as though such lands and right-of-way had been formally condemned. All costs and expenses occasioned by such condemnation for and the construction of such flushing-ditch or conduit, discharging-sewer or outlet beyond the city limits shall be assessed against the lots and pieces of land in the district or districts for which the same was constructed: Provided, That no sewer be permitted to empty into any stream from which a water supply is obtained within three miles above the point where said water supply is obtained.
K.S.A. 13-1016