Appurtenant rights are preserved. Nothing in this part shall be construed to deny the exercise of an appurtenant right , including access by the holder thereof to conduct activities necessary to assure the use, delivery, and quality of water including temperature and turbidity, that shall not be unreasonably withheld. A permit for water use based on an existing appurtenant right shall be issued upon application. The permit shall be subject to §§ 174C-26 and 174C-27 and 174C-58 to 174C-62.