Zebra Mussel Monitoring Project (ZMMP)

Lake Tawakoni

About Lake Tawakoni

Sources for characteristics are linked from the characteristic's value. Conservation pool elevation datum is NGVD29.

Impoundment Year 1960
Drainage Area 756 mi2
Capacity 871,685 acre-ft
Conservation Pool Elevation 437 ft
Counties Hunt, Rains, Van Zandt
Primary Uses Water Supply , Recreation
Additional Resources Texas Parks and Wildlife - Lake Tawakoni
Water Data for Texas - Lake Tawakoni
Texas Water Development Board - Lake Tawakoni
Lake Status

No Texas Parks and Wildlife Status.

Lake Map

Blue triangles show USGS data-collection locations.

Zebra Mussel Detection Data

Larvae (Veliger) Detections
Most Recent Detection First Date Detected
06/03/2020 Not Detected 06/30/2016

Larvae detection counts are averaged across all sampling sites.

Zebra mussels typically spawn in the spring and autumn as microscopic, free swimming larvae called 'veligers'. The USGS uses fine mesh nets to sample for larvae during the spawning season.

Adult or Juvenile Detections
Most Recent Detection First Date Detected
07/26/2016 Not Detected 06/30/2016

Adult detection counts are averaged across all sampling sites.

At the end of their larval stage, zebra mussels attach to a substrate and metamorphose into juveniles. The USGS conducts both visual and SCUBA inspections, and deploys artificial substrates as passive samplers, to get a estimate of the juvenile and adult zebra mussel populations.

Water Quality Data

Water-quality monitoring is important for studies of zebra mussel survival, growth, and reproduction. Water-quality data are also important for risk assessments for zebra mussel infestation.