The Aquatic Weed Program involves the maintenance application of chemical herbicides to reduce vegetation growth in canals, ponds, lakes and ditches. The maintenance application is done to minimize drainage flow restrictions and assure design or natural conveyance capacity. Algae growth control is also covered. The Aquatic Weed Control Program includes County staff that are licensed in herbicide application and qualified contractors who are also licensed in herbicide use and application. Each selected contractor is chosen every two years by the County's Purchasing Department in a competitive bidding process.
Spraying for Algae Control
Contracted Spray Site Locations
The County's geodatabase keeps track of the location of ponds, lakes canals and drainage flow-ways that have been sprayed by contractors. These sprayed areas either the County owns or the County has legal control.
Controlling algae also helps improve water quality for water-dwelling fish and other critters by increasing oxygen demand by the algae and depleting the oxygen for fish and other marine life.
Triploid Grass Carps Released in Lake Conley
On November 3, 2016, the Public Works Department stocked 300 triploid grass carps at Lake Conley in an effort to control nuisance vegetation in the Lake. Grass carp, sterile version of the white amur, is a long slender silver colored fish which can grow up to 100 pounds and feed almost exclusively on aquatic plants. These fish can eat two to three times their weight every day and may gain 5-10 pounds in a year. The Public Works Department has stocked grass carps in this water body several times during the past years and will continue to do so, since it has been a very effective biological control agent.