Lake Amistad Infested with Zebra Mussels

Date:
March 20, 2024
Contact: Amistad Visitor Center, 830-775-7492

We thank those persons who have been good stewards of Amistad National Recreation Area by cleaning, draining, and drying their vessels, to help protect the reservoir from aquatic invasive species.

Unfortunately, we recently detected adult zebra mussels in some areas along the lakeshore, indicating that an established population is present in the lake. The Texas Parks and Wildlife Department (TPWD) has designated the Amistad Reservoir as "infested" for invasive zebra mussels.

Zebra mussels can damage ecosystems, infrastructure, and fisheries. The NPS is monitoring the extent of the mussel infestation.

As per Texas State law, persons approaching or leaving public freshwater lakes are required to clean, drain, and dry their boats so that any invasive species are not spread to other waterbodies.

We are continuing to conduct boat inspections, which will help prevent the introduction of quagga mussels and other aquatic invasive species into Lake Amistad, that are harmful to the environment.

Before leaving the recreation area:

• Drain all water from your watercraft.
• Inspect equipment and remove any visible mud, plants, or animals.
• Dispose of unwanted bait and other animals or plants in the trash.
• Dry boat, trailer, and all equipment thoroughly. CD3 waterless cleaning units are available at Diablo East, Southwinds Marina, Rough Canyon and Box Canon boat ramps.

The ecosystem of the lake and the fisheries is currently healthy, and we need your help to protect the lake for your enjoyment and that of future generations.

Thank you,

Chris Ryan
Superintendent
Amistad National Recreation Area

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