Permission is hereby granted for the maintenance and use of all dams or bridges constructed on or before the effective date of this chapter, provided that all such dams or bridges and the maintenance and use thereof shall be subject to all the provisions of this chapter relating to dams and bridges, and upon the refusal or failure of a proprietor or lessee of any such dam or bridge to comply with this chapter, the county administrator shall order such dam or bridge closed and the river or stream placed on its original condition, and if such order is not complied within 60 days, the county administrator shall have the same done and bill the owner for the work. Upon the owner's failure to pay such bill by tax billing time, such bill shall be placed upon the tax bill of the owner(s) so delinquent and collected as taxes are collected.