"Maintain and protect" means to preserve the existing and designated uses of surface waters.
N.H. Admin. Code § Env-Wq 1702.25
(See Revision Note #1 at chapter heading for Env-Wq 1700) #7151, eff 12-10-99; ss by #9034, INTERIM, eff 12-10-07; ss by #9162, eff 5-21-08 (See Revision Note #2 at chapter heading for Env-Wq 1700)