AUSTIN (KXAN) — The city of Austin will look into lowering Lake Austin next year. It’s to fight back against the invasive hydrilla, but city leaders think they are not as effective as believed.
Hydrilla is a type of aquatic plant that grows close together. It can get caught in boat rudders and propellers, which makes it troublesome for fishers. The plant can also choke off waterways, which can lead to flooding.
Previously, the city of Austin released sterile carp into the lake back in July to control the spread of hydrilla. However, with the fish nearing the end of their lifespan, the invasive aquatic plants are returning.
Another method is lowering the lakes by 10 feet. These drawdowns help slow down the plant’s growth, but in a memo released last Friday by the Austin Watershed Protection, it said this method is actually helping the plant by reducing competition. The memo also went on to say that this drying period negatively impacts the native aquatic wildlife.
Another concern is the impact on nearby businesses. Some local businesses near Lake Austin depend on the stable lake levels, according to the city.
Right now, a cross-departmental working group is evaluating options for a potential drawdown next year. If it’s approved, the city will notify property owners in Lake Austin so they can be prepared for any repairs, maintenance or operations needed, according to the city.
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