The employees use the mechanical means to remove trash and debris from the waterways and lakes. Chemical means are used to control the growth and spreading of aquatic plants. Triploid grass carp, introduced into the waterways and lakes throughout the city, are the biological means of maintaining the water. The triploid grass carp feed off the submersed aquatic plants and help keep the amount under control. By using these 3 (three) methods, the appearance and effectiveness of the waterway system can benefit greatly.