Before the grade of any road, parkway, boulevard, or street, or part thereof, under the control and management of the board of park commissioners, which has been established, shall be changed, if the property owners affected thereby shall not have waived all claim to damages therefor, the board shall proceed to exercise the power of eminent domain in accordance with K.S.A. 26-501 to 26-516, inclusive.
K.S.A. 13-1326