Navarro County sheriff's deputies helped harvest and then confiscate more than $7 million worth of marijuana near a levee system.
Capt. Elmer Tanner said removal of the marijuana plot, about 5,000 plants, began Monday.
No arrests were immediately made, but Tanner says some individuals are under investigation. Two camp sites were located.
Chief Deputy Mike Cox put a street value on the marijuana, discovered Saturday during aerial surveillance by law officers, at $7.5 million.
Cox told the Corsicana Daily Sun that an elaborate pipe system provided irrigation, drawing water from creek bottoms.