"To mine" means to remove usable earth materials by excavating, dredging, blasting, or any other means which significantly alters the characteristics of the terrain or occurs in or on the borders of surface waters of the state.
N.H. Admin. Code § Env-Wq 1502.72
(See Revision Note #1 at chapter heading for Env-Wq 1500) #9343, eff 1-1-09