City Urges Boaters to Help Prevent Introduction of Invasive Plants in Lake Arlington

Despite four months having passed since the initial confirmation of giant salvinia at Lake Fork, which lies roughly 90 miles east of Arlington, the battle continues with this invasive species. Since November, two herbicide treatments have been performed with another one scheduled sometime this April.

During growing season, giant salvinia can double in size every two weeks if left untreated. It damages the aquatic ecosystem by outgrowing and replacing the native plants that have provided food and habitat for the native animals and waterfowl. Furthermore it blocks out sunlight and decreases oxygen concentrations to the harm of the fish and other aquatic species.

The cause of this outbreak is due to uneducated boaters not taking the necessary precautions and maintenance steps to prevent the introduction of the invasive species.

At the City of Arlington Parks and Recreation Department, we consider it a necessity for all boaters to take the proper preventative steps before and after entering the water. We ask that all boaters and watercraft users take a few minutes to review the proper maintenance steps in order to ensure that they are not at risk for bringing invasive species into the water.

With your help, we can ensure that all aquatic ecosystems in Arlington are available for continued public use and are safe and clean for years to come.

Click here to read more about giant salvinia and click here to learn about how you can help protect our waters.

Articles Giant Salvinia 04-26-16

Below you will find the original story regarding the outbreak at Lake Fork and above you will find a video from the Texas Parks and Wildlife about how to properly clean, drain, and dry your boat.

The Texas Parks and Wildlife Department has confirmed the presence of giant salvinia in Chaney Branch on Lake Fork. The infestation appears to be confined to this branch and another small cove west of the dam and occupies an estimated 3.25 acres. Judging by the distribution and age of the plants, it is apparent it has been in place for several months. As is the case for other introductions in East Texas, the plants were most likely introduced to the lake by boat trailer.

Lake Fork’s controlling authority, the Sabine River Authority (SRA), immediately closed boat ramps at Chaney Point South and Secret Haven, which are located at the westernmost end of Chaney Branch, in order to eliminate any further risk of spreading this invasive plant. The SRA has also conducted reconnaissance at bridge crossings and conducted shoreline surveys by boat to look for additional infestations.

Crews from the SRA and TPWD have physically removed salvinia plants and placed them in garbage bags for disposal. Additionally, crews have placed approximately 1,100 feet of floating boom across the creek, containing the infestation within the 90-acre cove.

SRA staff has also installed a floating sign and lights to alert boaters to the presence of the floating boom.

TPWD staff will be conducting a chemical treatment using glyphosate. All efforts will be made to protect beneficial aquatic plants while focusing treatment on killing the invasive giant salvinia. TPWD will continue to conduct additional surveys to check for the spread of the plant to other areas of the lake, and additional physical removals will be done if necessary.

Efforts to increase public awareness will be increased by installing warning signs at major boat ramps. Boaters and property owners are urged to clean, drain, and dry their boats and trailers in between trips and to report additional infestations outside of the Chaney Branch area by calling (903) 593-5077, (903) 570-5745, or by emailing

Giant salvinia is a floating fern native to Brazil. It reproduces by budding and spreads easily by the movement of wind and water currents. Giant salvinia grows rapidly and can double in coverage in a week. Uncontrolled, giant salvinia can impede navigation, block sunlight from reaching the water and hamper fishing.

This incident is a painful reminder of the importance of cleaning all plant material from your boat, trailer, and towing vehicle and draining your boat before leaving a lake. Transportation of aquatic invasive species is illegal in Texas.

For more information on giant salvinia and other invasive species, visit