Authorities have destroyed more than 4,500 marijuana plants found along the Centennial Wash near Wenden, about 100 miles northwest of Phoenix.

Federal and state investigators say the plants were 3- to 6-feet high and located in four separate plots throughout the one-acre site. They say the plants were located in a grove of salt cedar trees.

Each site had a pump and underground drip system. No arrests have been made in the case.