The Canal Maintenance Division is responsible for
keeping the waterways and lakes free of debris and aquatic plants. The division
has developed a schedule and a system to control the spread of aquatic plants.
The employees of this division use mechanical, biological, and chemical means
to keep the waterways and canals free from aquatic plants and trash. The
employees use the mechanical means to remove trash and debris from the waterways
and lakes. The chemical means are used to control the growth and spreading of
aquatic plants. Below is a chart of the types of chemicals that the Canal Maintenance
Division uses and what they treat. The biological means are the use of triploid
grass carp introduced into the waterways and lakes throughout the city. The division
introduced 3,000 triploid grass carp in 1988. The triploid grass carp feed off
the submersed aquatic plants that grow in the waterway and lakes. By using these
three methods the appearance and effectiveness of the waterway system will benefit
greatly. | 
